<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:xhtml="http://www.w3.org/1999/xhtml">
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-two-vectors/sssssm8y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-two-vectors/sssssm8y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-two-vectors/sssssm8y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-two-vectors/sssssm8y"/>
      <lastmod>2026-11-02T12:09:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-two-vectors/sssssm8y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-two-vectors/sssssm8y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-two-vectors/sssssm8y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-two-vectors/sssssm8y"/>
      <lastmod>2026-11-02T12:09:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/identify-the-shape-names/sssssm8a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identify-the-shape-names/sssssm8a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identify-the-shape-names/sssssm8a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identify-the-shape-names/sssssm8a"/>
      <lastmod>2026-11-02T11:56:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/identify-the-shape-names/sssssm8a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identify-the-shape-names/sssssm8a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identify-the-shape-names/sssssm8a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identify-the-shape-names/sssssm8a"/>
      <lastmod>2026-11-02T11:56:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-empirical-rule-of-normal-distribution/sssssm8c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-empirical-rule-of-normal-distribution/sssssm8c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-empirical-rule-of-normal-distribution/sssssm8c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-empirical-rule-of-normal-distribution/sssssm8c"/>
      <lastmod>2026-11-02T12:20:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-empirical-rule-of-normal-distribution/sssssm8c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-empirical-rule-of-normal-distribution/sssssm8c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-empirical-rule-of-normal-distribution/sssssm8c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-empirical-rule-of-normal-distribution/sssssm8c"/>
      <lastmod>2026-11-02T12:20:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-with-parallelograms/sssssm8r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-with-parallelograms/sssssm8r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-with-parallelograms/sssssm8r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-with-parallelograms/sssssm8r"/>
      <lastmod>2026-11-01T20:53:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-with-parallelograms/sssssm8r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-with-parallelograms/sssssm8r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-with-parallelograms/sssssm8r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-with-parallelograms/sssssm8r"/>
      <lastmod>2026-11-01T20:53:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-and-its-related-terms-activity-1/sssssm8h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-its-related-terms-activity-1/sssssm8h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-its-related-terms-activity-1/sssssm8h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-its-related-terms-activity-1/sssssm8h"/>
      <lastmod>2026-11-01T19:26:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-and-its-related-terms-activity-1/sssssm8h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-its-related-terms-activity-1/sssssm8h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-its-related-terms-activity-1/sssssm8h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-its-related-terms-activity-1/sssssm8h"/>
      <lastmod>2026-11-01T19:26:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformations-of-logarithmic-functions-negative-k-only/sssssm8t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-of-logarithmic-functions-negative-k-only/sssssm8t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-of-logarithmic-functions-negative-k-only/sssssm8t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-of-logarithmic-functions-negative-k-only/sssssm8t"/>
      <lastmod>2026-11-02T17:37:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformations-of-logarithmic-functions-negative-k-only/sssssm8t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-of-logarithmic-functions-negative-k-only/sssssm8t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-of-logarithmic-functions-negative-k-only/sssssm8t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-of-logarithmic-functions-negative-k-only/sssssm8t"/>
      <lastmod>2026-11-02T17:37:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/stratified-systematic-cluster-and-simple-random-sampling/sssssm8x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/stratified-systematic-cluster-and-simple-random-sampling/sssssm8x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/stratified-systematic-cluster-and-simple-random-sampling/sssssm8x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/stratified-systematic-cluster-and-simple-random-sampling/sssssm8x"/>
      <lastmod>2026-11-01T23:18:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/stratified-systematic-cluster-and-simple-random-sampling/sssssm8x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/stratified-systematic-cluster-and-simple-random-sampling/sssssm8x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/stratified-systematic-cluster-and-simple-random-sampling/sssssm8x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/stratified-systematic-cluster-and-simple-random-sampling/sssssm8x"/>
      <lastmod>2026-11-01T23:18:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a1-nrns-1-cube-roots-geometric-demonstration/sssssm8i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a1-nrns-1-cube-roots-geometric-demonstration/sssssm8i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a1-nrns-1-cube-roots-geometric-demonstration/sssssm8i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a1-nrns-1-cube-roots-geometric-demonstration/sssssm8i"/>
      <lastmod>2026-11-01T21:38:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a1-nrns-1-cube-roots-geometric-demonstration/sssssm8i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a1-nrns-1-cube-roots-geometric-demonstration/sssssm8i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a1-nrns-1-cube-roots-geometric-demonstration/sssssm8i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a1-nrns-1-cube-roots-geometric-demonstration/sssssm8i"/>
      <lastmod>2026-11-01T21:38:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sum-to-100-by-brana1/sssssm8o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-to-100-by-brana1/sssssm8o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-to-100-by-brana1/sssssm8o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-to-100-by-brana1/sssssm8o"/>
      <lastmod>2026-11-02T17:42:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sum-to-100-by-brana1/sssssm8o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-to-100-by-brana1/sssssm8o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-to-100-by-brana1/sssssm8o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-to-100-by-brana1/sssssm8o"/>
      <lastmod>2026-11-02T17:42:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/division-of-fractions-by-beena-mavani/sssssmus</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/division-of-fractions-by-beena-mavani/sssssmus"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/division-of-fractions-by-beena-mavani/sssssmus"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/division-of-fractions-by-beena-mavani/sssssmus"/>
      <lastmod>2026-11-02T13:35:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/division-of-fractions-by-beena-mavani/sssssmus</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/division-of-fractions-by-beena-mavani/sssssmus"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/division-of-fractions-by-beena-mavani/sssssmus"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/division-of-fractions-by-beena-mavani/sssssmus"/>
      <lastmod>2026-11-02T13:35:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilation-factor-of-parabola/sssssmu7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-factor-of-parabola/sssssmu7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-factor-of-parabola/sssssmu7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-factor-of-parabola/sssssmu7"/>
      <lastmod>2026-11-01T23:39:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilation-factor-of-parabola/sssssmu7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-factor-of-parabola/sssssmu7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-factor-of-parabola/sssssmu7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-factor-of-parabola/sssssmu7"/>
      <lastmod>2026-11-01T23:39:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/division-decision/sssssmun</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/division-decision/sssssmun"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/division-decision/sssssmun"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/division-decision/sssssmun"/>
      <lastmod>2026-11-02T02:56:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/division-decision/sssssmun</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/division-decision/sssssmun"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/division-decision/sssssmun"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/division-decision/sssssmun"/>
      <lastmod>2026-11-02T02:56:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graph-the-derivative-function/sssssmu2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-the-derivative-function/sssssmu2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-the-derivative-function/sssssmu2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-the-derivative-function/sssssmu2"/>
      <lastmod>2026-11-02T02:54:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graph-the-derivative-function/sssssmu2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-the-derivative-function/sssssmu2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-the-derivative-function/sssssmu2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-the-derivative-function/sssssmu2"/>
      <lastmod>2026-11-02T02:54:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-umbrella/sssssmuk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-umbrella/sssssmuk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-umbrella/sssssmuk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-umbrella/sssssmuk"/>
      <lastmod>2026-11-02T13:39:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-umbrella/sssssmuk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-umbrella/sssssmuk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-umbrella/sssssmuk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-umbrella/sssssmuk"/>
      <lastmod>2026-11-02T13:39:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proportional-segments-demo/sssssmuz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proportional-segments-demo/sssssmuz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proportional-segments-demo/sssssmuz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proportional-segments-demo/sssssmuz"/>
      <lastmod>2026-11-02T18:21:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proportional-segments-demo/sssssmuz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proportional-segments-demo/sssssmuz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proportional-segments-demo/sssssmuz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proportional-segments-demo/sssssmuz"/>
      <lastmod>2026-11-02T18:21:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiple-integrals-example-in-spherical-coordinates/sssssmu0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiple-integrals-example-in-spherical-coordinates/sssssmu0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiple-integrals-example-in-spherical-coordinates/sssssmu0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiple-integrals-example-in-spherical-coordinates/sssssmu0"/>
      <lastmod>2026-11-01T22:08:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiple-integrals-example-in-spherical-coordinates/sssssmu0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiple-integrals-example-in-spherical-coordinates/sssssmu0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiple-integrals-example-in-spherical-coordinates/sssssmu0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiple-integrals-example-in-spherical-coordinates/sssssmu0"/>
      <lastmod>2026-11-01T22:08:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-by-fred-del-pin/sssssmud</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-by-fred-del-pin/sssssmud"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-by-fred-del-pin/sssssmud"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-by-fred-del-pin/sssssmud"/>
      <lastmod>2026-11-01T20:45:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-by-fred-del-pin/sssssmud</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-by-fred-del-pin/sssssmud"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-by-fred-del-pin/sssssmud"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-by-fred-del-pin/sssssmud"/>
      <lastmod>2026-11-01T20:45:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/investigating-the-ellipse-foci-distances-and-geometric-properties/sssssmuf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-the-ellipse-foci-distances-and-geometric-properties/sssssmuf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-the-ellipse-foci-distances-and-geometric-properties/sssssmuf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-the-ellipse-foci-distances-and-geometric-properties/sssssmuf"/>
      <lastmod>2026-11-02T13:36:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/investigating-the-ellipse-foci-distances-and-geometric-properties/sssssmuf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-the-ellipse-foci-distances-and-geometric-properties/sssssmuf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-the-ellipse-foci-distances-and-geometric-properties/sssssmuf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-the-ellipse-foci-distances-and-geometric-properties/sssssmuf"/>
      <lastmod>2026-11-02T13:36:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inflating-a-tetrahedron-onto-a-sphere/sssssmu8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inflating-a-tetrahedron-onto-a-sphere/sssssmu8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inflating-a-tetrahedron-onto-a-sphere/sssssmu8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inflating-a-tetrahedron-onto-a-sphere/sssssmu8"/>
      <lastmod>2026-11-02T18:18:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inflating-a-tetrahedron-onto-a-sphere/sssssmu8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inflating-a-tetrahedron-onto-a-sphere/sssssmu8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inflating-a-tetrahedron-onto-a-sphere/sssssmu8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inflating-a-tetrahedron-onto-a-sphere/sssssmu8"/>
      <lastmod>2026-11-02T18:18:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mobilis-in-mobili-symmetry-generalised/sssssmuu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mobilis-in-mobili-symmetry-generalised/sssssmuu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mobilis-in-mobili-symmetry-generalised/sssssmuu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mobilis-in-mobili-symmetry-generalised/sssssmuu"/>
      <lastmod>2026-11-01T23:22:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mobilis-in-mobili-symmetry-generalised/sssssmuu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mobilis-in-mobili-symmetry-generalised/sssssmuu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mobilis-in-mobili-symmetry-generalised/sssssmuu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mobilis-in-mobili-symmetry-generalised/sssssmuu"/>
      <lastmod>2026-11-01T23:22:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/euler-s-method-demo/sssssmu5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euler-s-method-demo/sssssmu5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euler-s-method-demo/sssssmu5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euler-s-method-demo/sssssmu5"/>
      <lastmod>2026-11-01T21:10:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/euler-s-method-demo/sssssmu5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euler-s-method-demo/sssssmu5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euler-s-method-demo/sssssmu5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euler-s-method-demo/sssssmu5"/>
      <lastmod>2026-11-01T21:10:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-distance-quiz-on-coordinate-plane-v2/sssssmub</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-distance-quiz-on-coordinate-plane-v2/sssssmub"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-distance-quiz-on-coordinate-plane-v2/sssssmub"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-distance-quiz-on-coordinate-plane-v2/sssssmub"/>
      <lastmod>2026-11-02T00:16:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-distance-quiz-on-coordinate-plane-v2/sssssmub</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-distance-quiz-on-coordinate-plane-v2/sssssmub"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-distance-quiz-on-coordinate-plane-v2/sssssmub"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-distance-quiz-on-coordinate-plane-v2/sssssmub"/>
      <lastmod>2026-11-02T00:16:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/r-ssler-attractor/sssssmu3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/r-ssler-attractor/sssssmu3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/r-ssler-attractor/sssssmu3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/r-ssler-attractor/sssssmu3"/>
      <lastmod>2026-11-02T16:56:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/r-ssler-attractor/sssssmu3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/r-ssler-attractor/sssssmu3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/r-ssler-attractor/sssssmu3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/r-ssler-attractor/sssssmu3"/>
      <lastmod>2026-11-02T16:56:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/screw-bisection-of-a-cube/sssssmuq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/screw-bisection-of-a-cube/sssssmuq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/screw-bisection-of-a-cube/sssssmuq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/screw-bisection-of-a-cube/sssssmuq"/>
      <lastmod>2026-11-01T23:57:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/screw-bisection-of-a-cube/sssssmuq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/screw-bisection-of-a-cube/sssssmuq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/screw-bisection-of-a-cube/sssssmuq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/screw-bisection-of-a-cube/sssssmuq"/>
      <lastmod>2026-11-01T23:57:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-function-examples-with-geometric-constructions/sssssmu1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-function-examples-with-geometric-constructions/sssssmu1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-function-examples-with-geometric-constructions/sssssmu1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-function-examples-with-geometric-constructions/sssssmu1"/>
      <lastmod>2026-11-01T21:11:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-function-examples-with-geometric-constructions/sssssmu1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-function-examples-with-geometric-constructions/sssssmu1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-function-examples-with-geometric-constructions/sssssmu1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-function-examples-with-geometric-constructions/sssssmu1"/>
      <lastmod>2026-11-01T21:11:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-transformations-of-a-dome/sssssmum</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-of-a-dome/sssssmum"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-of-a-dome/sssssmum"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-of-a-dome/sssssmum"/>
      <lastmod>2026-11-01T20:45:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-transformations-of-a-dome/sssssmum</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-of-a-dome/sssssmum"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-of-a-dome/sssssmum"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-of-a-dome/sssssmum"/>
      <lastmod>2026-11-01T20:45:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-the-nets-of-prisms/sssssmuj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-nets-of-prisms/sssssmuj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-nets-of-prisms/sssssmuj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-nets-of-prisms/sssssmuj"/>
      <lastmod>2026-11-02T12:49:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-the-nets-of-prisms/sssssmuj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-nets-of-prisms/sssssmuj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-nets-of-prisms/sssssmuj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-nets-of-prisms/sssssmuj"/>
      <lastmod>2026-11-02T12:49:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-pyramid-construction-by-n-roach/sssssmup</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-pyramid-construction-by-n-roach/sssssmup"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-pyramid-construction-by-n-roach/sssssmup"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-pyramid-construction-by-n-roach/sssssmup"/>
      <lastmod>2026-11-02T18:19:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-pyramid-construction-by-n-roach/sssssmup</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-pyramid-construction-by-n-roach/sssssmup"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-pyramid-construction-by-n-roach/sssssmup"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-pyramid-construction-by-n-roach/sssssmup"/>
      <lastmod>2026-11-02T18:19:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-cross-sections-of-a-cube-along-a-space-diagonal/sssssmuw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-cross-sections-of-a-cube-along-a-space-diagonal/sssssmuw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-cross-sections-of-a-cube-along-a-space-diagonal/sssssmuw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-cross-sections-of-a-cube-along-a-space-diagonal/sssssmuw"/>
      <lastmod>2026-11-02T17:08:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-cross-sections-of-a-cube-along-a-space-diagonal/sssssmuw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-cross-sections-of-a-cube-along-a-space-diagonal/sssssmuw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-cross-sections-of-a-cube-along-a-space-diagonal/sssssmuw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-cross-sections-of-a-cube-along-a-space-diagonal/sssssmuw"/>
      <lastmod>2026-11-02T17:08:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformations-of-sine-and-cosine/sssssmu6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-of-sine-and-cosine/sssssmu6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-of-sine-and-cosine/sssssmu6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-of-sine-and-cosine/sssssmu6"/>
      <lastmod>2026-11-01T23:13:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformations-of-sine-and-cosine/sssssmu6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-of-sine-and-cosine/sssssmu6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-of-sine-and-cosine/sssssmu6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-of-sine-and-cosine/sssssmu6"/>
      <lastmod>2026-11-01T23:13:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-function-graph/sssssmug</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-function-graph/sssssmug"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-function-graph/sssssmug"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-function-graph/sssssmug"/>
      <lastmod>2026-11-02T16:46:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-function-graph/sssssmug</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-function-graph/sssssmug"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-function-graph/sssssmug"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-function-graph/sssssmug"/>
      <lastmod>2026-11-02T16:46:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-between-two-planes-by-arifshazia314/sssssmu9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-by-arifshazia314/sssssmu9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-two-planes-by-arifshazia314/sssssmu9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-by-arifshazia314/sssssmu9"/>
      <lastmod>2026-11-02T16:45:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-between-two-planes-by-arifshazia314/sssssmu9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-by-arifshazia314/sssssmu9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-two-planes-by-arifshazia314/sssssmu9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-by-arifshazia314/sssssmu9"/>
      <lastmod>2026-11-02T16:45:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-demo-by-steve-phelps/sssssmue</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-demo-by-steve-phelps/sssssmue"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-demo-by-steve-phelps/sssssmue"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-demo-by-steve-phelps/sssssmue"/>
      <lastmod>2026-11-02T18:13:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-demo-by-steve-phelps/sssssmue</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-demo-by-steve-phelps/sssssmue"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-demo-by-steve-phelps/sssssmue"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-demo-by-steve-phelps/sssssmue"/>
      <lastmod>2026-11-02T18:13:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-game-trapezoid-cc/sssssmuv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-game-trapezoid-cc/sssssmuv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-game-trapezoid-cc/sssssmuv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-game-trapezoid-cc/sssssmuv"/>
      <lastmod>2026-11-02T09:35:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-game-trapezoid-cc/sssssmuv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-game-trapezoid-cc/sssssmuv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-game-trapezoid-cc/sssssmuv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-game-trapezoid-cc/sssssmuv"/>
      <lastmod>2026-11-02T09:35:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inscribed-circle-of-a-triangle/sssssmu4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inscribed-circle-of-a-triangle/sssssmu4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inscribed-circle-of-a-triangle/sssssmu4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inscribed-circle-of-a-triangle/sssssmu4"/>
      <lastmod>2026-11-01T21:08:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inscribed-circle-of-a-triangle/sssssmu4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inscribed-circle-of-a-triangle/sssssmu4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inscribed-circle-of-a-triangle/sssssmu4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inscribed-circle-of-a-triangle/sssssmu4"/>
      <lastmod>2026-11-01T21:08:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/addition-to-one-hundred/sssssmul</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-to-one-hundred/sssssmul"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-to-one-hundred/sssssmul"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-to-one-hundred/sssssmul"/>
      <lastmod>2026-11-02T16:37:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/addition-to-one-hundred/sssssmul</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-to-one-hundred/sssssmul"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-to-one-hundred/sssssmul"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-to-one-hundred/sssssmul"/>
      <lastmod>2026-11-02T16:37:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-vector-magnitude-calculation/sssssmuy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-vector-magnitude-calculation/sssssmuy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-vector-magnitude-calculation/sssssmuy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-vector-magnitude-calculation/sssssmuy"/>
      <lastmod>2026-11-01T21:22:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-vector-magnitude-calculation/sssssmuy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-vector-magnitude-calculation/sssssmuy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-vector-magnitude-calculation/sssssmuy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-vector-magnitude-calculation/sssssmuy"/>
      <lastmod>2026-11-01T21:22:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplication-bingo-game/sssssmua</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-bingo-game/sssssmua"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-bingo-game/sssssmua"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-bingo-game/sssssmua"/>
      <lastmod>2026-11-02T16:42:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplication-bingo-game/sssssmua</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-bingo-game/sssssmua"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-bingo-game/sssssmua"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-bingo-game/sssssmua"/>
      <lastmod>2026-11-02T16:42:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/point-on-an-ellipse-farthest-from-a-given-point/sssssmuc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-on-an-ellipse-farthest-from-a-given-point/sssssmuc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-on-an-ellipse-farthest-from-a-given-point/sssssmuc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-on-an-ellipse-farthest-from-a-given-point/sssssmuc"/>
      <lastmod>2026-11-02T18:48:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/point-on-an-ellipse-farthest-from-a-given-point/sssssmuc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-on-an-ellipse-farthest-from-a-given-point/sssssmuc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-on-an-ellipse-farthest-from-a-given-point/sssssmuc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-on-an-ellipse-farthest-from-a-given-point/sssssmuc"/>
      <lastmod>2026-11-02T18:48:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-with-random-point-in-equilateral-triangle/sssssmur</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-with-random-point-in-equilateral-triangle/sssssmur"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-with-random-point-in-equilateral-triangle/sssssmur"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-with-random-point-in-equilateral-triangle/sssssmur"/>
      <lastmod>2026-11-01T21:29:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-with-random-point-in-equilateral-triangle/sssssmur</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-with-random-point-in-equilateral-triangle/sssssmur"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-with-random-point-in-equilateral-triangle/sssssmur"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-with-random-point-in-equilateral-triangle/sssssmur"/>
      <lastmod>2026-11-01T21:29:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-calculation-of-solid-of-revolution/sssssmuh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-calculation-of-solid-of-revolution/sssssmuh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-calculation-of-solid-of-revolution/sssssmuh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-calculation-of-solid-of-revolution/sssssmuh"/>
      <lastmod>2026-11-01T19:11:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-calculation-of-solid-of-revolution/sssssmuh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-calculation-of-solid-of-revolution/sssssmuh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-calculation-of-solid-of-revolution/sssssmuh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-calculation-of-solid-of-revolution/sssssmuh"/>
      <lastmod>2026-11-01T19:11:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/butterfly-effect-in-fraction-addition/sssssmut</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/butterfly-effect-in-fraction-addition/sssssmut"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/butterfly-effect-in-fraction-addition/sssssmut"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/butterfly-effect-in-fraction-addition/sssssmut"/>
      <lastmod>2026-11-01T20:52:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/butterfly-effect-in-fraction-addition/sssssmut</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/butterfly-effect-in-fraction-addition/sssssmut"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/butterfly-effect-in-fraction-addition/sssssmut"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/butterfly-effect-in-fraction-addition/sssssmut"/>
      <lastmod>2026-11-01T20:52:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exterior-angles-of-polygons-by-tim-brzezinski/sssssmux</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angles-of-polygons-by-tim-brzezinski/sssssmux"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angles-of-polygons-by-tim-brzezinski/sssssmux"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angles-of-polygons-by-tim-brzezinski/sssssmux"/>
      <lastmod>2026-11-02T12:33:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exterior-angles-of-polygons-by-tim-brzezinski/sssssmux</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angles-of-polygons-by-tim-brzezinski/sssssmux"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angles-of-polygons-by-tim-brzezinski/sssssmux"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angles-of-polygons-by-tim-brzezinski/sssssmux"/>
      <lastmod>2026-11-02T12:33:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-graph-transformations/sssssmui</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-graph-transformations/sssssmui"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-graph-transformations/sssssmui"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-graph-transformations/sssssmui"/>
      <lastmod>2026-11-02T02:45:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-graph-transformations/sssssmui</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-graph-transformations/sssssmui"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-graph-transformations/sssssmui"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-graph-transformations/sssssmui"/>
      <lastmod>2026-11-02T02:45:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-views/sssssmuo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-views/sssssmuo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-views/sssssmuo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-views/sssssmuo"/>
      <lastmod>2026-11-01T20:57:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-views/sssssmuo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-views/sssssmuo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-views/sssssmuo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-views/sssssmuo"/>
      <lastmod>2026-11-01T20:57:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/epsilon-delta-definition-of-limits-demo/sssssm5s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/epsilon-delta-definition-of-limits-demo/sssssm5s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/epsilon-delta-definition-of-limits-demo/sssssm5s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/epsilon-delta-definition-of-limits-demo/sssssm5s"/>
      <lastmod>2026-11-02T18:18:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/epsilon-delta-definition-of-limits-demo/sssssm5s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/epsilon-delta-definition-of-limits-demo/sssssm5s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/epsilon-delta-definition-of-limits-demo/sssssm5s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/epsilon-delta-definition-of-limits-demo/sssssm5s"/>
      <lastmod>2026-11-02T18:18:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-normal-distribution/sssssm57</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-normal-distribution/sssssm57"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-normal-distribution/sssssm57"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-normal-distribution/sssssm57"/>
      <lastmod>2026-11-01T21:28:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-normal-distribution/sssssm57</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-normal-distribution/sssssm57"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-normal-distribution/sssssm57"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-normal-distribution/sssssm57"/>
      <lastmod>2026-11-01T21:28:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangles-with-3-common-measures-practice/sssssm5n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangles-with-3-common-measures-practice/sssssm5n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangles-with-3-common-measures-practice/sssssm5n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangles-with-3-common-measures-practice/sssssm5n"/>
      <lastmod>2026-11-02T02:02:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangles-with-3-common-measures-practice/sssssm5n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangles-with-3-common-measures-practice/sssssm5n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangles-with-3-common-measures-practice/sssssm5n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangles-with-3-common-measures-practice/sssssm5n"/>
      <lastmod>2026-11-02T02:02:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-decomposition-workbench/sssssm52</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-decomposition-workbench/sssssm52"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-decomposition-workbench/sssssm52"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-decomposition-workbench/sssssm52"/>
      <lastmod>2026-11-02T17:57:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-decomposition-workbench/sssssm52</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-decomposition-workbench/sssssm52"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-decomposition-workbench/sssssm52"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-decomposition-workbench/sssssm52"/>
      <lastmod>2026-11-02T17:57:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/infinite-series-of-squares/sssssm5k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/infinite-series-of-squares/sssssm5k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/infinite-series-of-squares/sssssm5k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/infinite-series-of-squares/sssssm5k"/>
      <lastmod>2026-11-01T23:17:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/infinite-series-of-squares/sssssm5k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/infinite-series-of-squares/sssssm5k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/infinite-series-of-squares/sssssm5k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/infinite-series-of-squares/sssssm5k"/>
      <lastmod>2026-11-01T23:17:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/projectile-motion-by-tan-seng-kwang/sssssm5z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/projectile-motion-by-tan-seng-kwang/sssssm5z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/projectile-motion-by-tan-seng-kwang/sssssm5z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/projectile-motion-by-tan-seng-kwang/sssssm5z"/>
      <lastmod>2026-11-02T00:11:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/projectile-motion-by-tan-seng-kwang/sssssm5z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/projectile-motion-by-tan-seng-kwang/sssssm5z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/projectile-motion-by-tan-seng-kwang/sssssm5z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/projectile-motion-by-tan-seng-kwang/sssssm5z"/>
      <lastmod>2026-11-02T00:11:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/segment-addition-postulate-problem/sssssm50</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-problem/sssssm50"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/segment-addition-postulate-problem/sssssm50"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-problem/sssssm50"/>
      <lastmod>2026-11-02T09:15:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/segment-addition-postulate-problem/sssssm50</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-problem/sssssm50"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/segment-addition-postulate-problem/sssssm50"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-problem/sssssm50"/>
      <lastmod>2026-11-02T09:15:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-inequality-discovery-lesson/sssssm5d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-inequality-discovery-lesson/sssssm5d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-inequality-discovery-lesson/sssssm5d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-inequality-discovery-lesson/sssssm5d"/>
      <lastmod>2026-11-02T18:19:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-inequality-discovery-lesson/sssssm5d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-inequality-discovery-lesson/sssssm5d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-inequality-discovery-lesson/sssssm5d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-inequality-discovery-lesson/sssssm5d"/>
      <lastmod>2026-11-02T18:19:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadrifolium-as-a-projection-of-a-tennis-ball-curve/sssssm5f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrifolium-as-a-projection-of-a-tennis-ball-curve/sssssm5f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrifolium-as-a-projection-of-a-tennis-ball-curve/sssssm5f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrifolium-as-a-projection-of-a-tennis-ball-curve/sssssm5f"/>
      <lastmod>2026-11-02T16:43:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadrifolium-as-a-projection-of-a-tennis-ball-curve/sssssm5f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrifolium-as-a-projection-of-a-tennis-ball-curve/sssssm5f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrifolium-as-a-projection-of-a-tennis-ball-curve/sssssm5f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrifolium-as-a-projection-of-a-tennis-ball-curve/sssssm5f"/>
      <lastmod>2026-11-02T16:43:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-and-sun-projection-demonstration/sssssm58</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-and-sun-projection-demonstration/sssssm58"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-and-sun-projection-demonstration/sssssm58"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-and-sun-projection-demonstration/sssssm58"/>
      <lastmod>2026-11-02T00:32:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-and-sun-projection-demonstration/sssssm58</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-and-sun-projection-demonstration/sssssm58"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-and-sun-projection-demonstration/sssssm58"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-and-sun-projection-demonstration/sssssm58"/>
      <lastmod>2026-11-02T00:32:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-demonstration-by-line-merethe-fagereng/sssssm5u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-demonstration-by-line-merethe-fagereng/sssssm5u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-demonstration-by-line-merethe-fagereng/sssssm5u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-demonstration-by-line-merethe-fagereng/sssssm5u"/>
      <lastmod>2026-11-01T23:40:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-demonstration-by-line-merethe-fagereng/sssssm5u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-demonstration-by-line-merethe-fagereng/sssssm5u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-demonstration-by-line-merethe-fagereng/sssssm5u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-demonstration-by-line-merethe-fagereng/sssssm5u"/>
      <lastmod>2026-11-01T23:40:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/locus-of-a-parabola-by-angelina-s-t-lam/sssssm55</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-of-a-parabola-by-angelina-s-t-lam/sssssm55"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-of-a-parabola-by-angelina-s-t-lam/sssssm55"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-of-a-parabola-by-angelina-s-t-lam/sssssm55"/>
      <lastmod>2026-11-02T17:56:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/locus-of-a-parabola-by-angelina-s-t-lam/sssssm55</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-of-a-parabola-by-angelina-s-t-lam/sssssm55"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-of-a-parabola-by-angelina-s-t-lam/sssssm55"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-of-a-parabola-by-angelina-s-t-lam/sssssm55"/>
      <lastmod>2026-11-02T17:56:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-green-star-shape-with-red-borders/sssssm5b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-green-star-shape-with-red-borders/sssssm5b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-green-star-shape-with-red-borders/sssssm5b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-green-star-shape-with-red-borders/sssssm5b"/>
      <lastmod>2026-11-02T02:32:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-green-star-shape-with-red-borders/sssssm5b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-green-star-shape-with-red-borders/sssssm5b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-green-star-shape-with-red-borders/sssssm5b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-green-star-shape-with-red-borders/sssssm5b"/>
      <lastmod>2026-11-02T02:32:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perimeter-and-area-of-a-rectangle/sssssm53</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-and-area-of-a-rectangle/sssssm53"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-and-area-of-a-rectangle/sssssm53"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-and-area-of-a-rectangle/sssssm53"/>
      <lastmod>2026-11-02T02:56:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perimeter-and-area-of-a-rectangle/sssssm53</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-and-area-of-a-rectangle/sssssm53"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-and-area-of-a-rectangle/sssssm53"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-and-area-of-a-rectangle/sssssm53"/>
      <lastmod>2026-11-02T02:56:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/thread-art-with-mod-multiplication/sssssm5q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/thread-art-with-mod-multiplication/sssssm5q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/thread-art-with-mod-multiplication/sssssm5q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/thread-art-with-mod-multiplication/sssssm5q"/>
      <lastmod>2026-11-02T18:20:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/thread-art-with-mod-multiplication/sssssm5q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/thread-art-with-mod-multiplication/sssssm5q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/thread-art-with-mod-multiplication/sssssm5q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/thread-art-with-mod-multiplication/sssssm5q"/>
      <lastmod>2026-11-02T18:20:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logarithmic-transformation-4/sssssm51</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-transformation-4/sssssm51"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-transformation-4/sssssm51"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-transformation-4/sssssm51"/>
      <lastmod>2026-11-01T23:20:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logarithmic-transformation-4/sssssm51</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-transformation-4/sssssm51"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-transformation-4/sssssm51"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-transformation-4/sssssm51"/>
      <lastmod>2026-11-01T23:20:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modeling-equations-with-bar-models/sssssm5m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modeling-equations-with-bar-models/sssssm5m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modeling-equations-with-bar-models/sssssm5m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modeling-equations-with-bar-models/sssssm5m"/>
      <lastmod>2026-11-01T21:55:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modeling-equations-with-bar-models/sssssm5m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modeling-equations-with-bar-models/sssssm5m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modeling-equations-with-bar-models/sssssm5m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modeling-equations-with-bar-models/sssssm5m"/>
      <lastmod>2026-11-01T21:55:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hydrostatic-pressure-and-buoyancy-demo/sssssm5j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hydrostatic-pressure-and-buoyancy-demo/sssssm5j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hydrostatic-pressure-and-buoyancy-demo/sssssm5j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hydrostatic-pressure-and-buoyancy-demo/sssssm5j"/>
      <lastmod>2026-11-01T23:12:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hydrostatic-pressure-and-buoyancy-demo/sssssm5j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hydrostatic-pressure-and-buoyancy-demo/sssssm5j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hydrostatic-pressure-and-buoyancy-demo/sssssm5j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hydrostatic-pressure-and-buoyancy-demo/sssssm5j"/>
      <lastmod>2026-11-01T23:12:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dandelin-sphere-demonstration/sssssm5p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dandelin-sphere-demonstration/sssssm5p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dandelin-sphere-demonstration/sssssm5p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dandelin-sphere-demonstration/sssssm5p"/>
      <lastmod>2026-11-02T18:35:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dandelin-sphere-demonstration/sssssm5p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dandelin-sphere-demonstration/sssssm5p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dandelin-sphere-demonstration/sssssm5p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dandelin-sphere-demonstration/sssssm5p"/>
      <lastmod>2026-11-02T18:35:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-trigonometric-ratios-by-s-sharma/sssssm5w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-trigonometric-ratios-by-s-sharma/sssssm5w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-trigonometric-ratios-by-s-sharma/sssssm5w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-trigonometric-ratios-by-s-sharma/sssssm5w"/>
      <lastmod>2026-11-01T23:20:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-trigonometric-ratios-by-s-sharma/sssssm5w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-trigonometric-ratios-by-s-sharma/sssssm5w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-trigonometric-ratios-by-s-sharma/sssssm5w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-trigonometric-ratios-by-s-sharma/sssssm5w"/>
      <lastmod>2026-11-01T23:20:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/revenue-cost-profit-intro/sssssm56</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/revenue-cost-profit-intro/sssssm56"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/revenue-cost-profit-intro/sssssm56"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/revenue-cost-profit-intro/sssssm56"/>
      <lastmod>2026-11-02T02:35:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/revenue-cost-profit-intro/sssssm56</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/revenue-cost-profit-intro/sssssm56"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/revenue-cost-profit-intro/sssssm56"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/revenue-cost-profit-intro/sssssm56"/>
      <lastmod>2026-11-02T02:35:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coordinate-point-construction/sssssm5g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinate-point-construction/sssssm5g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinate-point-construction/sssssm5g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinate-point-construction/sssssm5g"/>
      <lastmod>2026-11-01T19:31:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coordinate-point-construction/sssssm5g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinate-point-construction/sssssm5g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinate-point-construction/sssssm5g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinate-point-construction/sssssm5g"/>
      <lastmod>2026-11-01T19:31:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-tangent-types-illustrator/sssssm59</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-tangent-types-illustrator/sssssm59"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-tangent-types-illustrator/sssssm59"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-tangent-types-illustrator/sssssm59"/>
      <lastmod>2026-11-01T21:38:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-tangent-types-illustrator/sssssm59</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-tangent-types-illustrator/sssssm59"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-tangent-types-illustrator/sssssm59"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-tangent-types-illustrator/sssssm59"/>
      <lastmod>2026-11-01T21:38:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cuboid-and-its-net-by-k-nirmala-devi/sssssm5e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cuboid-and-its-net-by-k-nirmala-devi/sssssm5e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cuboid-and-its-net-by-k-nirmala-devi/sssssm5e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cuboid-and-its-net-by-k-nirmala-devi/sssssm5e"/>
      <lastmod>2026-11-01T20:40:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cuboid-and-its-net-by-k-nirmala-devi/sssssm5e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cuboid-and-its-net-by-k-nirmala-devi/sssssm5e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cuboid-and-its-net-by-k-nirmala-devi/sssssm5e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cuboid-and-its-net-by-k-nirmala-devi/sssssm5e"/>
      <lastmod>2026-11-01T20:40:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-trigonometry-by-sally-booth/sssssm5v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-trigonometry-by-sally-booth/sssssm5v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-trigonometry-by-sally-booth/sssssm5v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-trigonometry-by-sally-booth/sssssm5v"/>
      <lastmod>2026-11-02T18:27:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-trigonometry-by-sally-booth/sssssm5v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-trigonometry-by-sally-booth/sssssm5v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-trigonometry-by-sally-booth/sssssm5v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-trigonometry-by-sally-booth/sssssm5v"/>
      <lastmod>2026-11-02T18:27:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-distribution-and-hypothesis-testing/sssssm54</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-and-hypothesis-testing/sssssm54"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-and-hypothesis-testing/sssssm54"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-and-hypothesis-testing/sssssm54"/>
      <lastmod>2026-11-02T17:43:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-distribution-and-hypothesis-testing/sssssm54</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-and-hypothesis-testing/sssssm54"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-and-hypothesis-testing/sssssm54"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-and-hypothesis-testing/sssssm54"/>
      <lastmod>2026-11-02T17:43:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hypothesis-testing-for-proportion-using-binomial-distribution/sssssm5l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hypothesis-testing-for-proportion-using-binomial-distribution/sssssm5l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hypothesis-testing-for-proportion-using-binomial-distribution/sssssm5l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hypothesis-testing-for-proportion-using-binomial-distribution/sssssm5l"/>
      <lastmod>2026-11-01T23:46:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hypothesis-testing-for-proportion-using-binomial-distribution/sssssm5l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hypothesis-testing-for-proportion-using-binomial-distribution/sssssm5l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hypothesis-testing-for-proportion-using-binomial-distribution/sssssm5l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hypothesis-testing-for-proportion-using-binomial-distribution/sssssm5l"/>
      <lastmod>2026-11-01T23:46:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-in-sphere-tetrahedron/sssssm5y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-in-sphere-tetrahedron/sssssm5y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-in-sphere-tetrahedron/sssssm5y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-in-sphere-tetrahedron/sssssm5y"/>
      <lastmod>2026-11-01T23:26:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-in-sphere-tetrahedron/sssssm5y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-in-sphere-tetrahedron/sssssm5y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-in-sphere-tetrahedron/sssssm5y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-in-sphere-tetrahedron/sssssm5y"/>
      <lastmod>2026-11-01T23:26:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-by-jaredwarner4/sssssm5a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-by-jaredwarner4/sssssm5a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-by-jaredwarner4/sssssm5a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-by-jaredwarner4/sssssm5a"/>
      <lastmod>2026-11-02T18:19:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-by-jaredwarner4/sssssm5a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-by-jaredwarner4/sssssm5a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-by-jaredwarner4/sssssm5a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-by-jaredwarner4/sssssm5a"/>
      <lastmod>2026-11-02T18:19:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-parametric-curves-integral-demo/sssssm5c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-parametric-curves-integral-demo/sssssm5c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-parametric-curves-integral-demo/sssssm5c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-parametric-curves-integral-demo/sssssm5c"/>
      <lastmod>2026-11-01T19:29:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-parametric-curves-integral-demo/sssssm5c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-parametric-curves-integral-demo/sssssm5c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-parametric-curves-integral-demo/sssssm5c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-parametric-curves-integral-demo/sssssm5c"/>
      <lastmod>2026-11-01T19:29:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-lines-with-y-intercept-1-or-1/sssssm5r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-lines-with-y-intercept-1-or-1/sssssm5r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-lines-with-y-intercept-1-or-1/sssssm5r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-lines-with-y-intercept-1-or-1/sssssm5r"/>
      <lastmod>2026-11-02T00:26:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-lines-with-y-intercept-1-or-1/sssssm5r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-lines-with-y-intercept-1-or-1/sssssm5r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-lines-with-y-intercept-1-or-1/sssssm5r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-lines-with-y-intercept-1-or-1/sssssm5r"/>
      <lastmod>2026-11-02T00:26:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-on-parabola/sssssm5h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-on-parabola/sssssm5h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-on-parabola/sssssm5h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-on-parabola/sssssm5h"/>
      <lastmod>2026-11-02T12:28:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-on-parabola/sssssm5h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-on-parabola/sssssm5h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-on-parabola/sssssm5h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-on-parabola/sssssm5h"/>
      <lastmod>2026-11-02T12:28:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-construction-of-the-perpendicular-bissector/sssssm5t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-construction-of-the-perpendicular-bissector/sssssm5t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-construction-of-the-perpendicular-bissector/sssssm5t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-construction-of-the-perpendicular-bissector/sssssm5t"/>
      <lastmod>2026-11-02T17:06:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-construction-of-the-perpendicular-bissector/sssssm5t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-construction-of-the-perpendicular-bissector/sssssm5t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-construction-of-the-perpendicular-bissector/sssssm5t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-construction-of-the-perpendicular-bissector/sssssm5t"/>
      <lastmod>2026-11-02T17:06:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-unfolding/sssssm5x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-unfolding/sssssm5x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-unfolding/sssssm5x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-unfolding/sssssm5x"/>
      <lastmod>2026-11-01T23:11:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-unfolding/sssssm5x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-unfolding/sssssm5x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-unfolding/sssssm5x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-unfolding/sssssm5x"/>
      <lastmod>2026-11-01T23:11:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-trigonometry-via-similar-triangles/sssssm5i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-trigonometry-via-similar-triangles/sssssm5i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-trigonometry-via-similar-triangles/sssssm5i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-trigonometry-via-similar-triangles/sssssm5i"/>
      <lastmod>2026-11-02T09:35:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-trigonometry-via-similar-triangles/sssssm5i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-trigonometry-via-similar-triangles/sssssm5i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-trigonometry-via-similar-triangles/sssssm5i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-trigonometry-via-similar-triangles/sssssm5i"/>
      <lastmod>2026-11-02T09:35:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lorenz-attractor/sssssm5o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lorenz-attractor/sssssm5o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lorenz-attractor/sssssm5o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lorenz-attractor/sssssm5o"/>
      <lastmod>2026-11-02T09:33:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lorenz-attractor/sssssm5o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lorenz-attractor/sssssm5o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lorenz-attractor/sssssm5o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lorenz-attractor/sssssm5o"/>
      <lastmod>2026-11-02T09:33:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-and-perimeter-polygon-measurement-and-fractal-iteration/sssssmbs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-and-perimeter-polygon-measurement-and-fractal-iteration/sssssmbs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-and-perimeter-polygon-measurement-and-fractal-iteration/sssssmbs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-and-perimeter-polygon-measurement-and-fractal-iteration/sssssmbs"/>
      <lastmod>2026-11-01T19:15:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-and-perimeter-polygon-measurement-and-fractal-iteration/sssssmbs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-and-perimeter-polygon-measurement-and-fractal-iteration/sssssmbs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-and-perimeter-polygon-measurement-and-fractal-iteration/sssssmbs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-and-perimeter-polygon-measurement-and-fractal-iteration/sssssmbs"/>
      <lastmod>2026-11-01T19:15:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-moment-method-moment-diagram-by-parts-cantilever-beam/sssssmb7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-moment-method-moment-diagram-by-parts-cantilever-beam/sssssmb7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-moment-method-moment-diagram-by-parts-cantilever-beam/sssssmb7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-moment-method-moment-diagram-by-parts-cantilever-beam/sssssmb7"/>
      <lastmod>2026-11-02T09:48:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-moment-method-moment-diagram-by-parts-cantilever-beam/sssssmb7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-moment-method-moment-diagram-by-parts-cantilever-beam/sssssmb7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-moment-method-moment-diagram-by-parts-cantilever-beam/sssssmb7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-moment-method-moment-diagram-by-parts-cantilever-beam/sssssmb7"/>
      <lastmod>2026-11-02T09:48:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lz-8-6-1-3-scatter-plots-spreadsheet/sssssmbn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lz-8-6-1-3-scatter-plots-spreadsheet/sssssmbn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lz-8-6-1-3-scatter-plots-spreadsheet/sssssmbn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lz-8-6-1-3-scatter-plots-spreadsheet/sssssmbn"/>
      <lastmod>2026-11-02T18:34:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lz-8-6-1-3-scatter-plots-spreadsheet/sssssmbn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lz-8-6-1-3-scatter-plots-spreadsheet/sssssmbn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lz-8-6-1-3-scatter-plots-spreadsheet/sssssmbn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lz-8-6-1-3-scatter-plots-spreadsheet/sssssmbn"/>
      <lastmod>2026-11-02T18:34:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/eigenvectors/sssssmb2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eigenvectors/sssssmb2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eigenvectors/sssssmb2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eigenvectors/sssssmb2"/>
      <lastmod>2026-11-01T21:27:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/eigenvectors/sssssmb2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eigenvectors/sssssmb2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eigenvectors/sssssmb2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eigenvectors/sssssmb2"/>
      <lastmod>2026-11-01T21:27:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quiz-circle-graphing-eq-in-standard-form/sssssmbk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-circle-graphing-eq-in-standard-form/sssssmbk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-circle-graphing-eq-in-standard-form/sssssmbk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-circle-graphing-eq-in-standard-form/sssssmbk"/>
      <lastmod>2026-11-01T21:29:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quiz-circle-graphing-eq-in-standard-form/sssssmbk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-circle-graphing-eq-in-standard-form/sssssmbk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-circle-graphing-eq-in-standard-form/sssssmbk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-circle-graphing-eq-in-standard-form/sssssmbk"/>
      <lastmod>2026-11-01T21:29:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fifth-egg/sssssmbz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fifth-egg/sssssmbz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fifth-egg/sssssmbz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fifth-egg/sssssmbz"/>
      <lastmod>2026-11-02T02:14:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fifth-egg/sssssmbz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fifth-egg/sssssmbz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fifth-egg/sssssmbz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fifth-egg/sssssmbz"/>
      <lastmod>2026-11-02T02:14:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/where-is-the-circumcenter-of-horry-county/sssssmb0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/where-is-the-circumcenter-of-horry-county/sssssmb0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/where-is-the-circumcenter-of-horry-county/sssssmb0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/where-is-the-circumcenter-of-horry-county/sssssmb0"/>
      <lastmod>2026-11-01T21:52:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/where-is-the-circumcenter-of-horry-county/sssssmb0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/where-is-the-circumcenter-of-horry-county/sssssmb0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/where-is-the-circumcenter-of-horry-county/sssssmb0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/where-is-the-circumcenter-of-horry-county/sssssmb0"/>
      <lastmod>2026-11-01T21:52:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/p12-fw-formulas-plus-question-solutions-functions-histograms-and-complex-numb/sssssmbd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p12-fw-formulas-plus-question-solutions-functions-histograms-and-complex-numb/sssssmbd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p12-fw-formulas-plus-question-solutions-functions-histograms-and-complex-numb/sssssmbd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p12-fw-formulas-plus-question-solutions-functions-histograms-and-complex-numb/sssssmbd"/>
      <lastmod>2026-11-02T09:02:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/p12-fw-formulas-plus-question-solutions-functions-histograms-and-complex-numb/sssssmbd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p12-fw-formulas-plus-question-solutions-functions-histograms-and-complex-numb/sssssmbd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p12-fw-formulas-plus-question-solutions-functions-histograms-and-complex-numb/sssssmbd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p12-fw-formulas-plus-question-solutions-functions-histograms-and-complex-numb/sssssmbd"/>
      <lastmod>2026-11-02T09:02:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/observation-platform-2/sssssmbf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/observation-platform-2/sssssmbf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/observation-platform-2/sssssmbf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/observation-platform-2/sssssmbf"/>
      <lastmod>2026-11-02T11:59:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/observation-platform-2/sssssmbf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/observation-platform-2/sssssmbf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/observation-platform-2/sssssmbf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/observation-platform-2/sssssmbf"/>
      <lastmod>2026-11-02T11:59:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/least-squares-2a/sssssmb8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/least-squares-2a/sssssmb8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/least-squares-2a/sssssmb8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/least-squares-2a/sssssmb8"/>
      <lastmod>2026-11-01T21:14:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/least-squares-2a/sssssmb8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/least-squares-2a/sssssmb8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/least-squares-2a/sssssmb8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/least-squares-2a/sssssmb8"/>
      <lastmod>2026-11-01T21:14:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-msbuist/sssssmbu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-msbuist/sssssmbu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-msbuist/sssssmbu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-msbuist/sssssmbu"/>
      <lastmod>2026-11-02T18:16:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-msbuist/sssssmbu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-msbuist/sssssmbu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-msbuist/sssssmbu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-msbuist/sssssmbu"/>
      <lastmod>2026-11-02T18:16:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/huh-constructions/sssssmb5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/huh-constructions/sssssmb5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/huh-constructions/sssssmb5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/huh-constructions/sssssmb5"/>
      <lastmod>2026-11-02T17:46:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/huh-constructions/sssssmb5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/huh-constructions/sssssmb5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/huh-constructions/sssssmb5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/huh-constructions/sssssmb5"/>
      <lastmod>2026-11-02T17:46:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-chest-measurements/sssssmbb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-chest-measurements/sssssmbb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-chest-measurements/sssssmbb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-chest-measurements/sssssmbb"/>
      <lastmod>2026-11-01T21:10:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-chest-measurements/sssssmbb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-chest-measurements/sssssmbb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-chest-measurements/sssssmbb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-chest-measurements/sssssmbb"/>
      <lastmod>2026-11-01T21:10:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-fractions-by-loh-yan-xiang/sssssmb3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-fractions-by-loh-yan-xiang/sssssmb3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-fractions-by-loh-yan-xiang/sssssmb3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-fractions-by-loh-yan-xiang/sssssmb3"/>
      <lastmod>2026-11-02T03:04:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-fractions-by-loh-yan-xiang/sssssmb3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-fractions-by-loh-yan-xiang/sssssmb3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-fractions-by-loh-yan-xiang/sssssmb3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-fractions-by-loh-yan-xiang/sssssmb3"/>
      <lastmod>2026-11-02T03:04:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-probability-demo/sssssmbq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-probability-demo/sssssmbq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-probability-demo/sssssmbq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-probability-demo/sssssmbq"/>
      <lastmod>2026-11-02T07:10:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-probability-demo/sssssmbq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-probability-demo/sssssmbq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-probability-demo/sssssmbq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-probability-demo/sssssmbq"/>
      <lastmod>2026-11-02T07:10:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-d-example-sssssr2z/sssssmb1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-d-example-sssssr2z/sssssmb1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-d-example-sssssr2z/sssssmb1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-d-example-sssssr2z/sssssmb1"/>
      <lastmod>2026-11-02T17:55:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-d-example-sssssr2z/sssssmb1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-d-example-sssssr2z/sssssmb1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-d-example-sssssr2z/sssssmb1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-d-example-sssssr2z/sssssmb1"/>
      <lastmod>2026-11-02T17:55:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parametric-area-calculation/sssssmbm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-area-calculation/sssssmbm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-area-calculation/sssssmbm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-area-calculation/sssssmbm"/>
      <lastmod>2026-11-01T19:30:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parametric-area-calculation/sssssmbm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-area-calculation/sssssmbm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-area-calculation/sssssmbm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-area-calculation/sssssmbm"/>
      <lastmod>2026-11-01T19:30:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-and-octagon/sssssmbj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-and-octagon/sssssmbj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-and-octagon/sssssmbj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-and-octagon/sssssmbj"/>
      <lastmod>2026-11-01T23:34:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-and-octagon/sssssmbj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-and-octagon/sssssmbj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-and-octagon/sssssmbj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-and-octagon/sssssmbj"/>
      <lastmod>2026-11-01T23:34:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intro-to-scalar-multiplication-of-vectors/sssssmbp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intro-to-scalar-multiplication-of-vectors/sssssmbp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intro-to-scalar-multiplication-of-vectors/sssssmbp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intro-to-scalar-multiplication-of-vectors/sssssmbp"/>
      <lastmod>2026-11-02T12:51:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intro-to-scalar-multiplication-of-vectors/sssssmbp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intro-to-scalar-multiplication-of-vectors/sssssmbp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intro-to-scalar-multiplication-of-vectors/sssssmbp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intro-to-scalar-multiplication-of-vectors/sssssmbp"/>
      <lastmod>2026-11-02T12:51:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-and-subtracting-integers/sssssmbw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-and-subtracting-integers/sssssmbw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-and-subtracting-integers/sssssmbw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-and-subtracting-integers/sssssmbw"/>
      <lastmod>2026-11-02T13:45:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-and-subtracting-integers/sssssmbw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-and-subtracting-integers/sssssmbw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-and-subtracting-integers/sssssmbw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-and-subtracting-integers/sssssmbw"/>
      <lastmod>2026-11-02T13:45:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-2-dimensions/sssssmb6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-2-dimensions/sssssmb6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-2-dimensions/sssssmb6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-2-dimensions/sssssmb6"/>
      <lastmod>2026-11-02T16:46:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-2-dimensions/sssssmb6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-2-dimensions/sssssmb6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-2-dimensions/sssssmb6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-2-dimensions/sssssmb6"/>
      <lastmod>2026-11-02T16:46:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/calculate-the-volume-of-a-cylinder/sssssmbg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculate-the-volume-of-a-cylinder/sssssmbg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculate-the-volume-of-a-cylinder/sssssmbg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculate-the-volume-of-a-cylinder/sssssmbg"/>
      <lastmod>2026-11-02T16:34:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/calculate-the-volume-of-a-cylinder/sssssmbg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculate-the-volume-of-a-cylinder/sssssmbg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculate-the-volume-of-a-cylinder/sssssmbg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculate-the-volume-of-a-cylinder/sssssmbg"/>
      <lastmod>2026-11-02T16:34:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prism-construction-demo/sssssmb9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-construction-demo/sssssmb9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-construction-demo/sssssmb9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-construction-demo/sssssmb9"/>
      <lastmod>2026-11-02T18:59:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prism-construction-demo/sssssmb9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-construction-demo/sssssmb9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-construction-demo/sssssmb9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-construction-demo/sssssmb9"/>
      <lastmod>2026-11-02T18:59:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-properties-of-isosceles-trapezoids/sssssmbe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-properties-of-isosceles-trapezoids/sssssmbe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-properties-of-isosceles-trapezoids/sssssmbe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-properties-of-isosceles-trapezoids/sssssmbe"/>
      <lastmod>2026-11-02T09:01:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-properties-of-isosceles-trapezoids/sssssmbe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-properties-of-isosceles-trapezoids/sssssmbe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-properties-of-isosceles-trapezoids/sssssmbe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-properties-of-isosceles-trapezoids/sssssmbe"/>
      <lastmod>2026-11-02T09:01:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-and-intersection-demonstration-by-d-jayaseelan/sssssmbv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-and-intersection-demonstration-by-d-jayaseelan/sssssmbv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-and-intersection-demonstration-by-d-jayaseelan/sssssmbv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-and-intersection-demonstration-by-d-jayaseelan/sssssmbv"/>
      <lastmod>2026-11-02T14:58:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-and-intersection-demonstration-by-d-jayaseelan/sssssmbv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-and-intersection-demonstration-by-d-jayaseelan/sssssmbv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-and-intersection-demonstration-by-d-jayaseelan/sssssmbv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-and-intersection-demonstration-by-d-jayaseelan/sssssmbv"/>
      <lastmod>2026-11-02T14:58:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-construction-example-by-aubrey/sssssmb4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-example-by-aubrey/sssssmb4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-example-by-aubrey/sssssmb4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-example-by-aubrey/sssssmb4"/>
      <lastmod>2026-11-01T23:12:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-construction-example-by-aubrey/sssssmb4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-example-by-aubrey/sssssmb4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-example-by-aubrey/sssssmb4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-example-by-aubrey/sssssmb4"/>
      <lastmod>2026-11-01T23:12:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/why-we-use-limits/sssssmbl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/why-we-use-limits/sssssmbl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/why-we-use-limits/sssssmbl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/why-we-use-limits/sssssmbl"/>
      <lastmod>2026-11-01T19:17:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/why-we-use-limits/sssssmbl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/why-we-use-limits/sssssmbl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/why-we-use-limits/sssssmbl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/why-we-use-limits/sssssmbl"/>
      <lastmod>2026-11-01T19:17:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangents-to-parametric-curves/sssssmby</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangents-to-parametric-curves/sssssmby"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangents-to-parametric-curves/sssssmby"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangents-to-parametric-curves/sssssmby"/>
      <lastmod>2026-11-02T12:22:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangents-to-parametric-curves/sssssmby</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangents-to-parametric-curves/sssssmby"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangents-to-parametric-curves/sssssmby"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangents-to-parametric-curves/sssssmby"/>
      <lastmod>2026-11-02T12:22:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-construction-by-p-porras/sssssmba</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-construction-by-p-porras/sssssmba"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-construction-by-p-porras/sssssmba"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-construction-by-p-porras/sssssmba"/>
      <lastmod>2026-11-02T13:58:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-construction-by-p-porras/sssssmba</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-construction-by-p-porras/sssssmba"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-construction-by-p-porras/sssssmba"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-construction-by-p-porras/sssssmba"/>
      <lastmod>2026-11-02T13:58:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sum-of-exterior-angles-of-polygons-by-venkuchimal/sssssmbc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-exterior-angles-of-polygons-by-venkuchimal/sssssmbc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-exterior-angles-of-polygons-by-venkuchimal/sssssmbc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-exterior-angles-of-polygons-by-venkuchimal/sssssmbc"/>
      <lastmod>2026-11-02T16:53:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sum-of-exterior-angles-of-polygons-by-venkuchimal/sssssmbc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-exterior-angles-of-polygons-by-venkuchimal/sssssmbc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-exterior-angles-of-polygons-by-venkuchimal/sssssmbc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-exterior-angles-of-polygons-by-venkuchimal/sssssmbc"/>
      <lastmod>2026-11-02T16:53:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/limits-rates-of-change-and-tangent-lines-by-jerryl/sssssmbr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-rates-of-change-and-tangent-lines-by-jerryl/sssssmbr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-rates-of-change-and-tangent-lines-by-jerryl/sssssmbr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-rates-of-change-and-tangent-lines-by-jerryl/sssssmbr"/>
      <lastmod>2026-11-02T15:31:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/limits-rates-of-change-and-tangent-lines-by-jerryl/sssssmbr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-rates-of-change-and-tangent-lines-by-jerryl/sssssmbr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-rates-of-change-and-tangent-lines-by-jerryl/sssssmbr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-rates-of-change-and-tangent-lines-by-jerryl/sssssmbr"/>
      <lastmod>2026-11-02T15:31:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilations-of-line-segments/sssssmbh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-of-line-segments/sssssmbh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-of-line-segments/sssssmbh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-of-line-segments/sssssmbh"/>
      <lastmod>2026-11-02T18:40:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilations-of-line-segments/sssssmbh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-of-line-segments/sssssmbh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-of-line-segments/sssssmbh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-of-line-segments/sssssmbh"/>
      <lastmod>2026-11-02T18:40:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-sphere-compared-to-volume-of-hemisphere/sssssmbt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-sphere-compared-to-volume-of-hemisphere/sssssmbt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-sphere-compared-to-volume-of-hemisphere/sssssmbt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-sphere-compared-to-volume-of-hemisphere/sssssmbt"/>
      <lastmod>2026-11-02T00:53:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-sphere-compared-to-volume-of-hemisphere/sssssmbt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-sphere-compared-to-volume-of-hemisphere/sssssmbt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-sphere-compared-to-volume-of-hemisphere/sssssmbt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-sphere-compared-to-volume-of-hemisphere/sssssmbt"/>
      <lastmod>2026-11-02T00:53:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-number-and-geometry-demonstration/sssssmbx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-and-geometry-demonstration/sssssmbx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-and-geometry-demonstration/sssssmbx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-and-geometry-demonstration/sssssmbx"/>
      <lastmod>2026-11-01T21:12:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-number-and-geometry-demonstration/sssssmbx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-and-geometry-demonstration/sssssmbx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-and-geometry-demonstration/sssssmbx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-and-geometry-demonstration/sssssmbx"/>
      <lastmod>2026-11-01T21:12:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/24-point-circle/sssssmbi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/24-point-circle/sssssmbi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/24-point-circle/sssssmbi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/24-point-circle/sssssmbi"/>
      <lastmod>2026-11-02T11:04:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/24-point-circle/sssssmbi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/24-point-circle/sssssmbi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/24-point-circle/sssssmbi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/24-point-circle/sssssmbi"/>
      <lastmod>2026-11-02T11:04:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-investigation-of-dot-product-by-tobibrooks/sssssmbo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-investigation-of-dot-product-by-tobibrooks/sssssmbo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-investigation-of-dot-product-by-tobibrooks/sssssmbo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-investigation-of-dot-product-by-tobibrooks/sssssmbo"/>
      <lastmod>2026-11-01T23:30:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-investigation-of-dot-product-by-tobibrooks/sssssmbo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-investigation-of-dot-product-by-tobibrooks/sssssmbo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-investigation-of-dot-product-by-tobibrooks/sssssmbo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-investigation-of-dot-product-by-tobibrooks/sssssmbo"/>
      <lastmod>2026-11-01T23:30:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-as-parallelogram-with-2-fixed-equal-sides/sssssm3s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-as-parallelogram-with-2-fixed-equal-sides/sssssm3s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-as-parallelogram-with-2-fixed-equal-sides/sssssm3s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-as-parallelogram-with-2-fixed-equal-sides/sssssm3s"/>
      <lastmod>2026-11-02T13:56:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-as-parallelogram-with-2-fixed-equal-sides/sssssm3s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-as-parallelogram-with-2-fixed-equal-sides/sssssm3s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-as-parallelogram-with-2-fixed-equal-sides/sssssm3s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-as-parallelogram-with-2-fixed-equal-sides/sssssm3s"/>
      <lastmod>2026-11-02T13:56:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-problem-with-ellipse-rotation-and-standard-deviation/sssssm37</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-problem-with-ellipse-rotation-and-standard-deviation/sssssm37"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-problem-with-ellipse-rotation-and-standard-deviation/sssssm37"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-problem-with-ellipse-rotation-and-standard-deviation/sssssm37"/>
      <lastmod>2026-11-02T18:01:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-problem-with-ellipse-rotation-and-standard-deviation/sssssm37</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-problem-with-ellipse-rotation-and-standard-deviation/sssssm37"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-problem-with-ellipse-rotation-and-standard-deviation/sssssm37"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-problem-with-ellipse-rotation-and-standard-deviation/sssssm37"/>
      <lastmod>2026-11-02T18:01:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-experiment/sssssm3n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-experiment/sssssm3n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-experiment/sssssm3n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-experiment/sssssm3n"/>
      <lastmod>2026-11-02T18:01:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-experiment/sssssm3n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-experiment/sssssm3n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-experiment/sssssm3n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-experiment/sssssm3n"/>
      <lastmod>2026-11-02T18:01:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-vs-regular-curves/sssssm32</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-vs-regular-curves/sssssm32"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-vs-regular-curves/sssssm32"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-vs-regular-curves/sssssm32"/>
      <lastmod>2026-11-01T19:16:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-vs-regular-curves/sssssm32</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-vs-regular-curves/sssssm32"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-vs-regular-curves/sssssm32"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-vs-regular-curves/sssssm32"/>
      <lastmod>2026-11-01T19:16:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-extension/sssssm3k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-extension/sssssm3k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-extension/sssssm3k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-extension/sssssm3k"/>
      <lastmod>2026-11-01T19:27:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-extension/sssssm3k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-extension/sssssm3k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-extension/sssssm3k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-extension/sssssm3k"/>
      <lastmod>2026-11-01T19:27:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-limits-by-regina-greiwe-jackson/sssssm3z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-limits-by-regina-greiwe-jackson/sssssm3z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-limits-by-regina-greiwe-jackson/sssssm3z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-limits-by-regina-greiwe-jackson/sssssm3z"/>
      <lastmod>2026-11-02T11:47:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-limits-by-regina-greiwe-jackson/sssssm3z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-limits-by-regina-greiwe-jackson/sssssm3z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-limits-by-regina-greiwe-jackson/sssssm3z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-limits-by-regina-greiwe-jackson/sssssm3z"/>
      <lastmod>2026-11-02T11:47:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-conic-sections/sssssm30</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-conic-sections/sssssm30"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-conic-sections/sssssm30"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-conic-sections/sssssm30"/>
      <lastmod>2026-11-02T00:40:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-conic-sections/sssssm30</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-conic-sections/sssssm30"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-conic-sections/sssssm30"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-conic-sections/sssssm30"/>
      <lastmod>2026-11-02T00:40:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transforming-parabolas/sssssm3d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transforming-parabolas/sssssm3d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transforming-parabolas/sssssm3d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transforming-parabolas/sssssm3d"/>
      <lastmod>2026-11-02T17:07:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transforming-parabolas/sssssm3d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transforming-parabolas/sssssm3d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transforming-parabolas/sssssm3d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transforming-parabolas/sssssm3d"/>
      <lastmod>2026-11-02T17:07:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/array-of-dots-adjustable-dot-grid/sssssm3f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/array-of-dots-adjustable-dot-grid/sssssm3f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/array-of-dots-adjustable-dot-grid/sssssm3f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/array-of-dots-adjustable-dot-grid/sssssm3f"/>
      <lastmod>2026-11-01T22:04:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/array-of-dots-adjustable-dot-grid/sssssm3f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/array-of-dots-adjustable-dot-grid/sssssm3f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/array-of-dots-adjustable-dot-grid/sssssm3f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/array-of-dots-adjustable-dot-grid/sssssm3f"/>
      <lastmod>2026-11-01T22:04:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-cylinder-by-mohammed/sssssm38</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cylinder-by-mohammed/sssssm38"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cylinder-by-mohammed/sssssm38"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cylinder-by-mohammed/sssssm38"/>
      <lastmod>2026-11-02T17:17:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-a-cylinder-by-mohammed/sssssm38</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cylinder-by-mohammed/sssssm38"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cylinder-by-mohammed/sssssm38"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cylinder-by-mohammed/sssssm38"/>
      <lastmod>2026-11-02T17:17:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-and-ellipse-interaction-demo/sssssm3u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-and-ellipse-interaction-demo/sssssm3u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-and-ellipse-interaction-demo/sssssm3u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-and-ellipse-interaction-demo/sssssm3u"/>
      <lastmod>2026-11-01T21:34:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-and-ellipse-interaction-demo/sssssm3u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-and-ellipse-interaction-demo/sssssm3u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-and-ellipse-interaction-demo/sssssm3u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-and-ellipse-interaction-demo/sssssm3u"/>
      <lastmod>2026-11-01T21:34:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/analog-clock-simulation/sssssm35</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/analog-clock-simulation/sssssm35"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/analog-clock-simulation/sssssm35"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/analog-clock-simulation/sssssm35"/>
      <lastmod>2026-11-02T17:07:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/analog-clock-simulation/sssssm35</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/analog-clock-simulation/sssssm35"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/analog-clock-simulation/sssssm35"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/analog-clock-simulation/sssssm35"/>
      <lastmod>2026-11-02T17:07:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logarithmic-calculations/sssssm3b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-calculations/sssssm3b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-calculations/sssssm3b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-calculations/sssssm3b"/>
      <lastmod>2026-11-01T23:24:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logarithmic-calculations/sssssm3b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-calculations/sssssm3b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-calculations/sssssm3b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-calculations/sssssm3b"/>
      <lastmod>2026-11-01T23:24:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/truncated-icosidodecahedron-relationship-between-average-distance-and-truncatio/sssssm33</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-icosidodecahedron-relationship-between-average-distance-and-truncatio/sssssm33"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-icosidodecahedron-relationship-between-average-distance-and-truncatio/sssssm33"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-icosidodecahedron-relationship-between-average-distance-and-truncatio/sssssm33"/>
      <lastmod>2026-11-01T19:30:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/truncated-icosidodecahedron-relationship-between-average-distance-and-truncatio/sssssm33</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-icosidodecahedron-relationship-between-average-distance-and-truncatio/sssssm33"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-icosidodecahedron-relationship-between-average-distance-and-truncatio/sssssm33"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-icosidodecahedron-relationship-between-average-distance-and-truncatio/sssssm33"/>
      <lastmod>2026-11-01T19:30:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/one-sided-limits-exercise/sssssm3q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-sided-limits-exercise/sssssm3q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-sided-limits-exercise/sssssm3q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-sided-limits-exercise/sssssm3q"/>
      <lastmod>2026-11-02T17:39:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/one-sided-limits-exercise/sssssm3q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-sided-limits-exercise/sssssm3q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-sided-limits-exercise/sssssm3q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-sided-limits-exercise/sssssm3q"/>
      <lastmod>2026-11-02T17:39:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hexagons-around-hexagon/sssssm31</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagons-around-hexagon/sssssm31"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagons-around-hexagon/sssssm31"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagons-around-hexagon/sssssm31"/>
      <lastmod>2026-11-01T19:32:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hexagons-around-hexagon/sssssm31</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagons-around-hexagon/sssssm31"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagons-around-hexagon/sssssm31"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagons-around-hexagon/sssssm31"/>
      <lastmod>2026-11-01T19:32:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/centroid-demonstration-by-josh-rollins/sssssm3m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/centroid-demonstration-by-josh-rollins/sssssm3m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/centroid-demonstration-by-josh-rollins/sssssm3m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/centroid-demonstration-by-josh-rollins/sssssm3m"/>
      <lastmod>2026-11-02T18:21:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/centroid-demonstration-by-josh-rollins/sssssm3m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/centroid-demonstration-by-josh-rollins/sssssm3m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/centroid-demonstration-by-josh-rollins/sssssm3m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/centroid-demonstration-by-josh-rollins/sssssm3m"/>
      <lastmod>2026-11-02T18:21:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/central-and-inscribed-angles/sssssm3j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/central-and-inscribed-angles/sssssm3j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/central-and-inscribed-angles/sssssm3j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/central-and-inscribed-angles/sssssm3j"/>
      <lastmod>2026-11-01T19:20:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/central-and-inscribed-angles/sssssm3j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/central-and-inscribed-angles/sssssm3j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/central-and-inscribed-angles/sssssm3j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/central-and-inscribed-angles/sssssm3j"/>
      <lastmod>2026-11-01T19:20:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/eigenvectors-and-parametric-curves/sssssm3p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eigenvectors-and-parametric-curves/sssssm3p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eigenvectors-and-parametric-curves/sssssm3p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eigenvectors-and-parametric-curves/sssssm3p"/>
      <lastmod>2026-11-01T21:21:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/eigenvectors-and-parametric-curves/sssssm3p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eigenvectors-and-parametric-curves/sssssm3p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eigenvectors-and-parametric-curves/sssssm3p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eigenvectors-and-parametric-curves/sssssm3p"/>
      <lastmod>2026-11-01T21:21:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-ratios-by-axel-ambert-morales/sssssm3w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-by-axel-ambert-morales/sssssm3w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-by-axel-ambert-morales/sssssm3w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-by-axel-ambert-morales/sssssm3w"/>
      <lastmod>2026-11-02T12:57:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-ratios-by-axel-ambert-morales/sssssm3w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-by-axel-ambert-morales/sssssm3w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-by-axel-ambert-morales/sssssm3w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-by-axel-ambert-morales/sssssm3w"/>
      <lastmod>2026-11-02T12:57:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangles/sssssm36</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangles/sssssm36"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangles/sssssm36"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangles/sssssm36"/>
      <lastmod>2026-11-02T17:05:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangles/sssssm36</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangles/sssssm36"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangles/sssssm36"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangles/sssssm36"/>
      <lastmod>2026-11-02T17:05:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-calculation-and-differentiation-of-cones-cylinders-and-spheres/sssssm3g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-calculation-and-differentiation-of-cones-cylinders-and-spheres/sssssm3g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-calculation-and-differentiation-of-cones-cylinders-and-spheres/sssssm3g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-calculation-and-differentiation-of-cones-cylinders-and-spheres/sssssm3g"/>
      <lastmod>2026-11-01T19:05:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-calculation-and-differentiation-of-cones-cylinders-and-spheres/sssssm3g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-calculation-and-differentiation-of-cones-cylinders-and-spheres/sssssm3g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-calculation-and-differentiation-of-cones-cylinders-and-spheres/sssssm3g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-calculation-and-differentiation-of-cones-cylinders-and-spheres/sssssm3g"/>
      <lastmod>2026-11-01T19:05:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/creating-mathematical-models/sssssm39</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/creating-mathematical-models/sssssm39"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/creating-mathematical-models/sssssm39"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/creating-mathematical-models/sssssm39"/>
      <lastmod>2026-11-02T18:56:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/creating-mathematical-models/sssssm39</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/creating-mathematical-models/sssssm39"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/creating-mathematical-models/sssssm39"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/creating-mathematical-models/sssssm39"/>
      <lastmod>2026-11-02T18:56:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-n-nth-roots-of-a-complex-number/sssssm3e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-n-nth-roots-of-a-complex-number/sssssm3e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-n-nth-roots-of-a-complex-number/sssssm3e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-n-nth-roots-of-a-complex-number/sssssm3e"/>
      <lastmod>2026-11-02T09:47:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-n-nth-roots-of-a-complex-number/sssssm3e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-n-nth-roots-of-a-complex-number/sssssm3e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-n-nth-roots-of-a-complex-number/sssssm3e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-n-nth-roots-of-a-complex-number/sssssm3e"/>
      <lastmod>2026-11-02T09:47:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-sketcher/sssssm3v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-sketcher/sssssm3v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-sketcher/sssssm3v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-sketcher/sssssm3v"/>
      <lastmod>2026-11-02T18:51:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-sketcher/sssssm3v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-sketcher/sssssm3v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-sketcher/sssssm3v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-sketcher/sssssm3v"/>
      <lastmod>2026-11-02T18:51:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quantitative-qualitative-designators/sssssm34</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quantitative-qualitative-designators/sssssm34"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quantitative-qualitative-designators/sssssm34"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quantitative-qualitative-designators/sssssm34"/>
      <lastmod>2026-11-02T16:45:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quantitative-qualitative-designators/sssssm34</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quantitative-qualitative-designators/sssssm34"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quantitative-qualitative-designators/sssssm34"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quantitative-qualitative-designators/sssssm34"/>
      <lastmod>2026-11-02T16:45:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallel-boxplots-example/sssssm3l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-boxplots-example/sssssm3l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-boxplots-example/sssssm3l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-boxplots-example/sssssm3l"/>
      <lastmod>2026-11-02T15:11:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallel-boxplots-example/sssssm3l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-boxplots-example/sssssm3l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-boxplots-example/sssssm3l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-boxplots-example/sssssm3l"/>
      <lastmod>2026-11-02T15:11:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/22-5-angle-construction/sssssm3y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/22-5-angle-construction/sssssm3y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/22-5-angle-construction/sssssm3y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/22-5-angle-construction/sssssm3y"/>
      <lastmod>2026-11-02T12:25:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/22-5-angle-construction/sssssm3y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/22-5-angle-construction/sssssm3y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/22-5-angle-construction/sssssm3y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/22-5-angle-construction/sssssm3y"/>
      <lastmod>2026-11-02T12:25:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reciprocal-of-a-linear-function/sssssm3a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reciprocal-of-a-linear-function/sssssm3a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reciprocal-of-a-linear-function/sssssm3a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reciprocal-of-a-linear-function/sssssm3a"/>
      <lastmod>2026-11-01T22:01:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reciprocal-of-a-linear-function/sssssm3a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reciprocal-of-a-linear-function/sssssm3a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reciprocal-of-a-linear-function/sssssm3a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reciprocal-of-a-linear-function/sssssm3a"/>
      <lastmod>2026-11-01T22:01:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-completing-the-square/sssssm3c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-completing-the-square/sssssm3c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-completing-the-square/sssssm3c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-completing-the-square/sssssm3c"/>
      <lastmod>2026-11-01T23:17:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-completing-the-square/sssssm3c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-completing-the-square/sssssm3c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-completing-the-square/sssssm3c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-completing-the-square/sssssm3c"/>
      <lastmod>2026-11-01T23:17:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoids-isosceles-trapezoids/sssssm3r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoids-isosceles-trapezoids/sssssm3r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoids-isosceles-trapezoids/sssssm3r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoids-isosceles-trapezoids/sssssm3r"/>
      <lastmod>2026-11-02T00:16:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoids-isosceles-trapezoids/sssssm3r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoids-isosceles-trapezoids/sssssm3r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoids-isosceles-trapezoids/sssssm3r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoids-isosceles-trapezoids/sssssm3r"/>
      <lastmod>2026-11-02T00:16:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-equations-equilateral-triangles-interaction/sssssm3h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-equations-equilateral-triangles-interaction/sssssm3h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-equations-equilateral-triangles-interaction/sssssm3h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-equations-equilateral-triangles-interaction/sssssm3h"/>
      <lastmod>2026-11-01T21:33:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-equations-equilateral-triangles-interaction/sssssm3h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-equations-equilateral-triangles-interaction/sssssm3h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-equations-equilateral-triangles-interaction/sssssm3h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-equations-equilateral-triangles-interaction/sssssm3h"/>
      <lastmod>2026-11-01T21:33:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/least-squares-regression-line-demonstration/sssssm3t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/least-squares-regression-line-demonstration/sssssm3t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/least-squares-regression-line-demonstration/sssssm3t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/least-squares-regression-line-demonstration/sssssm3t"/>
      <lastmod>2026-11-02T00:11:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/least-squares-regression-line-demonstration/sssssm3t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/least-squares-regression-line-demonstration/sssssm3t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/least-squares-regression-line-demonstration/sssssm3t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/least-squares-regression-line-demonstration/sssssm3t"/>
      <lastmod>2026-11-02T00:11:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-equation-graphing-example-001/sssssm3x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equation-graphing-example-001/sssssm3x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equation-graphing-example-001/sssssm3x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equation-graphing-example-001/sssssm3x"/>
      <lastmod>2026-11-02T17:34:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-equation-graphing-example-001/sssssm3x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equation-graphing-example-001/sssssm3x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equation-graphing-example-001/sssssm3x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equation-graphing-example-001/sssssm3x"/>
      <lastmod>2026-11-02T17:34:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/locating-triangle-centers/sssssm3i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locating-triangle-centers/sssssm3i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locating-triangle-centers/sssssm3i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locating-triangle-centers/sssssm3i"/>
      <lastmod>2026-11-01T21:10:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/locating-triangle-centers/sssssm3i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locating-triangle-centers/sssssm3i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locating-triangle-centers/sssssm3i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locating-triangle-centers/sssssm3i"/>
      <lastmod>2026-11-01T21:10:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/venn-diagram-example/sssssm3o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-example/sssssm3o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-example/sssssm3o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-example/sssssm3o"/>
      <lastmod>2026-11-02T17:40:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/venn-diagram-example/sssssm3o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-example/sssssm3o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-example/sssssm3o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-example/sssssm3o"/>
      <lastmod>2026-11-02T17:40:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-circle-and-chord-relationship/sssssmqs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-circle-and-chord-relationship/sssssmqs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-circle-and-chord-relationship/sssssmqs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-circle-and-chord-relationship/sssssmqs"/>
      <lastmod>2026-11-02T18:08:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-circle-and-chord-relationship/sssssmqs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-circle-and-chord-relationship/sssssmqs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-circle-and-chord-relationship/sssssmqs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-circle-and-chord-relationship/sssssmqs"/>
      <lastmod>2026-11-02T18:08:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/one-variable-analysis/sssssmq7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-variable-analysis/sssssmq7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-variable-analysis/sssssmq7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-variable-analysis/sssssmq7"/>
      <lastmod>2026-11-02T18:25:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/one-variable-analysis/sssssmq7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-variable-analysis/sssssmq7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-variable-analysis/sssssmq7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-variable-analysis/sssssmq7"/>
      <lastmod>2026-11-02T18:25:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-root-part-3/sssssmqn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-part-3/sssssmqn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-part-3/sssssmqn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-part-3/sssssmqn"/>
      <lastmod>2026-11-01T23:56:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-root-part-3/sssssmqn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-part-3/sssssmqn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-part-3/sssssmqn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-part-3/sssssmqn"/>
      <lastmod>2026-11-01T23:56:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/locus-of-points-equidistant-from-two-parallel-lines/sssssmq2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-of-points-equidistant-from-two-parallel-lines/sssssmq2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-of-points-equidistant-from-two-parallel-lines/sssssmq2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-of-points-equidistant-from-two-parallel-lines/sssssmq2"/>
      <lastmod>2026-11-02T18:41:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/locus-of-points-equidistant-from-two-parallel-lines/sssssmq2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-of-points-equidistant-from-two-parallel-lines/sssssmq2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-of-points-equidistant-from-two-parallel-lines/sssssmq2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-of-points-equidistant-from-two-parallel-lines/sssssmq2"/>
      <lastmod>2026-11-02T18:41:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equiangular-and-equilateral-polygons/sssssmqk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equiangular-and-equilateral-polygons/sssssmqk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equiangular-and-equilateral-polygons/sssssmqk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equiangular-and-equilateral-polygons/sssssmqk"/>
      <lastmod>2026-11-02T03:05:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equiangular-and-equilateral-polygons/sssssmqk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equiangular-and-equilateral-polygons/sssssmqk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equiangular-and-equilateral-polygons/sssssmqk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equiangular-and-equilateral-polygons/sssssmqk"/>
      <lastmod>2026-11-02T03:05:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vectors-a-b-and-a-b-form-a-triangle/sssssmqz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-a-b-and-a-b-form-a-triangle/sssssmqz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-a-b-and-a-b-form-a-triangle/sssssmqz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-a-b-and-a-b-form-a-triangle/sssssmqz"/>
      <lastmod>2026-11-02T18:40:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vectors-a-b-and-a-b-form-a-triangle/sssssmqz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-a-b-and-a-b-form-a-triangle/sssssmqz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-a-b-and-a-b-form-a-triangle/sssssmqz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-a-b-and-a-b-form-a-triangle/sssssmqz"/>
      <lastmod>2026-11-02T18:40:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/number-of-solutions-of-simultaneous-linear-equations/sssssmq0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-of-solutions-of-simultaneous-linear-equations/sssssmq0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-of-solutions-of-simultaneous-linear-equations/sssssmq0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-of-solutions-of-simultaneous-linear-equations/sssssmq0"/>
      <lastmod>2026-11-02T02:19:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/number-of-solutions-of-simultaneous-linear-equations/sssssmq0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-of-solutions-of-simultaneous-linear-equations/sssssmq0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-of-solutions-of-simultaneous-linear-equations/sssssmq0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-of-solutions-of-simultaneous-linear-equations/sssssmq0"/>
      <lastmod>2026-11-02T02:19:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perimeter-of-irregular-shapes/sssssmqd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-of-irregular-shapes/sssssmqd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-of-irregular-shapes/sssssmqd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-of-irregular-shapes/sssssmqd"/>
      <lastmod>2026-11-01T19:03:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perimeter-of-irregular-shapes/sssssmqd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-of-irregular-shapes/sssssmqd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-of-irregular-shapes/sssssmqd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-of-irregular-shapes/sssssmqd"/>
      <lastmod>2026-11-01T19:03:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-and-function-graphing/sssssmqf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-and-function-graphing/sssssmqf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-and-function-graphing/sssssmqf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-and-function-graphing/sssssmqf"/>
      <lastmod>2026-11-01T20:44:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-and-function-graphing/sssssmqf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-and-function-graphing/sssssmqf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-and-function-graphing/sssssmqf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-and-function-graphing/sssssmqf"/>
      <lastmod>2026-11-01T20:44:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ratio-word-problem-random-questions-with-interactive-feedback/sssssmq8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratio-word-problem-random-questions-with-interactive-feedback/sssssmq8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratio-word-problem-random-questions-with-interactive-feedback/sssssmq8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratio-word-problem-random-questions-with-interactive-feedback/sssssmq8"/>
      <lastmod>2026-11-02T09:06:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ratio-word-problem-random-questions-with-interactive-feedback/sssssmq8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratio-word-problem-random-questions-with-interactive-feedback/sssssmq8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratio-word-problem-random-questions-with-interactive-feedback/sssssmq8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratio-word-problem-random-questions-with-interactive-feedback/sssssmq8"/>
      <lastmod>2026-11-02T09:06:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/partial-fraction-decomposition/sssssmqu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-fraction-decomposition/sssssmqu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-fraction-decomposition/sssssmqu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-fraction-decomposition/sssssmqu"/>
      <lastmod>2026-11-02T02:12:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/partial-fraction-decomposition/sssssmqu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-fraction-decomposition/sssssmqu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-fraction-decomposition/sssssmqu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-fraction-decomposition/sssssmqu"/>
      <lastmod>2026-11-02T02:12:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-multiplication-demonstration/sssssmq5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-multiplication-demonstration/sssssmq5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-multiplication-demonstration/sssssmq5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-multiplication-demonstration/sssssmq5"/>
      <lastmod>2026-11-02T00:43:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-multiplication-demonstration/sssssmq5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-multiplication-demonstration/sssssmq5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-multiplication-demonstration/sssssmq5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-multiplication-demonstration/sssssmq5"/>
      <lastmod>2026-11-02T00:43:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/representing-a-hole-in-a-prism-quarto-piece-model/sssssmqb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/representing-a-hole-in-a-prism-quarto-piece-model/sssssmqb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/representing-a-hole-in-a-prism-quarto-piece-model/sssssmqb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/representing-a-hole-in-a-prism-quarto-piece-model/sssssmqb"/>
      <lastmod>2026-11-01T21:38:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/representing-a-hole-in-a-prism-quarto-piece-model/sssssmqb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/representing-a-hole-in-a-prism-quarto-piece-model/sssssmqb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/representing-a-hole-in-a-prism-quarto-piece-model/sssssmqb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/representing-a-hole-in-a-prism-quarto-piece-model/sssssmqb"/>
      <lastmod>2026-11-01T21:38:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/aaa-triangle-congruence-exploration/sssssmq3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/aaa-triangle-congruence-exploration/sssssmq3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/aaa-triangle-congruence-exploration/sssssmq3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/aaa-triangle-congruence-exploration/sssssmq3"/>
      <lastmod>2026-11-02T02:37:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/aaa-triangle-congruence-exploration/sssssmq3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/aaa-triangle-congruence-exploration/sssssmq3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/aaa-triangle-congruence-exploration/sssssmq3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/aaa-triangle-congruence-exploration/sssssmq3"/>
      <lastmod>2026-11-02T02:37:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/experimental-probability-spinner-by-samantha-garcia/sssssmqq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/experimental-probability-spinner-by-samantha-garcia/sssssmqq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/experimental-probability-spinner-by-samantha-garcia/sssssmqq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/experimental-probability-spinner-by-samantha-garcia/sssssmqq"/>
      <lastmod>2026-11-01T20:54:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/experimental-probability-spinner-by-samantha-garcia/sssssmqq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/experimental-probability-spinner-by-samantha-garcia/sssssmqq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/experimental-probability-spinner-by-samantha-garcia/sssssmqq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/experimental-probability-spinner-by-samantha-garcia/sssssmqq"/>
      <lastmod>2026-11-01T20:54:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/limit-laws-demonstration/sssssmq1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limit-laws-demonstration/sssssmq1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limit-laws-demonstration/sssssmq1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limit-laws-demonstration/sssssmq1"/>
      <lastmod>2026-11-02T09:40:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/limit-laws-demonstration/sssssmq1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limit-laws-demonstration/sssssmq1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limit-laws-demonstration/sssssmq1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limit-laws-demonstration/sssssmq1"/>
      <lastmod>2026-11-02T09:40:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstrating-fraction-multiplication/sssssmqm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-fraction-multiplication/sssssmqm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-fraction-multiplication/sssssmqm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-fraction-multiplication/sssssmqm"/>
      <lastmod>2026-11-01T23:27:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstrating-fraction-multiplication/sssssmqm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-fraction-multiplication/sssssmqm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-fraction-multiplication/sssssmqm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-fraction-multiplication/sssssmqm"/>
      <lastmod>2026-11-01T23:27:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-constructions-lab/sssssmqj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-constructions-lab/sssssmqj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-constructions-lab/sssssmqj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-constructions-lab/sssssmqj"/>
      <lastmod>2026-11-02T17:54:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-constructions-lab/sssssmqj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-constructions-lab/sssssmqj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-constructions-lab/sssssmqj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-constructions-lab/sssssmqj"/>
      <lastmod>2026-11-02T17:54:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-and-probabilistic-connections-exploring-triangle-functions-and-prob/sssssmqp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-and-probabilistic-connections-exploring-triangle-functions-and-prob/sssssmqp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-and-probabilistic-connections-exploring-triangle-functions-and-prob/sssssmqp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-and-probabilistic-connections-exploring-triangle-functions-and-prob/sssssmqp"/>
      <lastmod>2026-11-02T00:47:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-and-probabilistic-connections-exploring-triangle-functions-and-prob/sssssmqp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-and-probabilistic-connections-exploring-triangle-functions-and-prob/sssssmqp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-and-probabilistic-connections-exploring-triangle-functions-and-prob/sssssmqp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-and-probabilistic-connections-exploring-triangle-functions-and-prob/sssssmqp"/>
      <lastmod>2026-11-02T00:47:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-inequality-solutions-example/sssssmqw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-inequality-solutions-example/sssssmqw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-inequality-solutions-example/sssssmqw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-inequality-solutions-example/sssssmqw"/>
      <lastmod>2026-11-02T18:25:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-inequality-solutions-example/sssssmqw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-inequality-solutions-example/sssssmqw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-inequality-solutions-example/sssssmqw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-inequality-solutions-example/sssssmqw"/>
      <lastmod>2026-11-02T18:25:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-geogebra-graphing-calculator/sssssmq6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-geogebra-graphing-calculator/sssssmq6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-geogebra-graphing-calculator/sssssmq6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-geogebra-graphing-calculator/sssssmq6"/>
      <lastmod>2026-11-01T22:11:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-geogebra-graphing-calculator/sssssmq6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-geogebra-graphing-calculator/sssssmq6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-geogebra-graphing-calculator/sssssmq6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-geogebra-graphing-calculator/sssssmq6"/>
      <lastmod>2026-11-01T22:11:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/p2-subtraction-demo/sssssmqg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p2-subtraction-demo/sssssmqg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p2-subtraction-demo/sssssmqg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p2-subtraction-demo/sssssmqg"/>
      <lastmod>2026-11-02T18:02:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/p2-subtraction-demo/sssssmqg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p2-subtraction-demo/sssssmqg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p2-subtraction-demo/sssssmqg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p2-subtraction-demo/sssssmqg"/>
      <lastmod>2026-11-02T18:02:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombicosidodecahedron-by-chris-cambr/sssssmq9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombicosidodecahedron-by-chris-cambr/sssssmq9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombicosidodecahedron-by-chris-cambr/sssssmq9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombicosidodecahedron-by-chris-cambr/sssssmq9"/>
      <lastmod>2026-11-02T13:33:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombicosidodecahedron-by-chris-cambr/sssssmq9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombicosidodecahedron-by-chris-cambr/sssssmq9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombicosidodecahedron-by-chris-cambr/sssssmq9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombicosidodecahedron-by-chris-cambr/sssssmq9"/>
      <lastmod>2026-11-02T13:33:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/limit-and-tangent-line-demonstration/sssssmqe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limit-and-tangent-line-demonstration/sssssmqe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limit-and-tangent-line-demonstration/sssssmqe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limit-and-tangent-line-demonstration/sssssmqe"/>
      <lastmod>2026-11-01T21:58:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/limit-and-tangent-line-demonstration/sssssmqe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limit-and-tangent-line-demonstration/sssssmqe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limit-and-tangent-line-demonstration/sssssmqe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limit-and-tangent-line-demonstration/sssssmqe"/>
      <lastmod>2026-11-01T21:58:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-triangle-angle-sum-theorem-by-mrs-cole/sssssmqv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-triangle-angle-sum-theorem-by-mrs-cole/sssssmqv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-triangle-angle-sum-theorem-by-mrs-cole/sssssmqv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-triangle-angle-sum-theorem-by-mrs-cole/sssssmqv"/>
      <lastmod>2026-11-02T12:57:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-triangle-angle-sum-theorem-by-mrs-cole/sssssmqv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-triangle-angle-sum-theorem-by-mrs-cole/sssssmqv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-triangle-angle-sum-theorem-by-mrs-cole/sssssmqv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-triangle-angle-sum-theorem-by-mrs-cole/sssssmqv"/>
      <lastmod>2026-11-02T12:57:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-cone-and-cube/sssssmq4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-cone-and-cube/sssssmq4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-cone-and-cube/sssssmq4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-cone-and-cube/sssssmq4"/>
      <lastmod>2026-11-02T18:58:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-cone-and-cube/sssssmq4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-cone-and-cube/sssssmq4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-cone-and-cube/sssssmq4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-cone-and-cube/sssssmq4"/>
      <lastmod>2026-11-02T18:58:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/golden-mean-music-scale-quadratic-equation/sssssmql</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/golden-mean-music-scale-quadratic-equation/sssssmql"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/golden-mean-music-scale-quadratic-equation/sssssmql"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/golden-mean-music-scale-quadratic-equation/sssssmql"/>
      <lastmod>2026-11-01T23:59:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/golden-mean-music-scale-quadratic-equation/sssssmql</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/golden-mean-music-scale-quadratic-equation/sssssmql"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/golden-mean-music-scale-quadratic-equation/sssssmql"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/golden-mean-music-scale-quadratic-equation/sssssmql"/>
      <lastmod>2026-11-01T23:59:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-spheres-in-a-cube-with-diagonal-cross-section/sssssmqy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-spheres-in-a-cube-with-diagonal-cross-section/sssssmqy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-spheres-in-a-cube-with-diagonal-cross-section/sssssmqy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-spheres-in-a-cube-with-diagonal-cross-section/sssssmqy"/>
      <lastmod>2026-11-02T17:43:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-spheres-in-a-cube-with-diagonal-cross-section/sssssmqy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-spheres-in-a-cube-with-diagonal-cross-section/sssssmqy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-spheres-in-a-cube-with-diagonal-cross-section/sssssmqy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-spheres-in-a-cube-with-diagonal-cross-section/sssssmqy"/>
      <lastmod>2026-11-02T17:43:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animation-demonstrating-isosceles-triangles-and-linear-regression/sssssmqa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-demonstrating-isosceles-triangles-and-linear-regression/sssssmqa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-demonstrating-isosceles-triangles-and-linear-regression/sssssmqa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-demonstrating-isosceles-triangles-and-linear-regression/sssssmqa"/>
      <lastmod>2026-11-02T12:45:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animation-demonstrating-isosceles-triangles-and-linear-regression/sssssmqa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-demonstrating-isosceles-triangles-and-linear-regression/sssssmqa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-demonstrating-isosceles-triangles-and-linear-regression/sssssmqa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-demonstrating-isosceles-triangles-and-linear-regression/sssssmqa"/>
      <lastmod>2026-11-02T12:45:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-by-osvaldo-do-a/sssssmqc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-by-osvaldo-do-a/sssssmqc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-by-osvaldo-do-a/sssssmqc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-by-osvaldo-do-a/sssssmqc"/>
      <lastmod>2026-11-02T00:49:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-by-osvaldo-do-a/sssssmqc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-by-osvaldo-do-a/sssssmqc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-by-osvaldo-do-a/sssssmqc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-by-osvaldo-do-a/sssssmqc"/>
      <lastmod>2026-11-02T00:49:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/basic-matrix-operations/sssssmqr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-matrix-operations/sssssmqr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-matrix-operations/sssssmqr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-matrix-operations/sssssmqr"/>
      <lastmod>2026-11-01T23:29:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/basic-matrix-operations/sssssmqr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-matrix-operations/sssssmqr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-matrix-operations/sssssmqr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-matrix-operations/sssssmqr"/>
      <lastmod>2026-11-01T23:29:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-investigation/sssssmqh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-investigation/sssssmqh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-investigation/sssssmqh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-investigation/sssssmqh"/>
      <lastmod>2026-11-02T16:48:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-investigation/sssssmqh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-investigation/sssssmqh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-investigation/sssssmqh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-investigation/sssssmqh"/>
      <lastmod>2026-11-02T16:48:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-over-the-line-y-x/sssssmqt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-over-the-line-y-x/sssssmqt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-over-the-line-y-x/sssssmqt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-over-the-line-y-x/sssssmqt"/>
      <lastmod>2026-11-01T21:15:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-over-the-line-y-x/sssssmqt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-over-the-line-y-x/sssssmqt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-over-the-line-y-x/sssssmqt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-over-the-line-y-x/sssssmqt"/>
      <lastmod>2026-11-01T21:15:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/no-solution-3-contradictory-conditions-in-geometry-and-calculus/sssssmqx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/no-solution-3-contradictory-conditions-in-geometry-and-calculus/sssssmqx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/no-solution-3-contradictory-conditions-in-geometry-and-calculus/sssssmqx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/no-solution-3-contradictory-conditions-in-geometry-and-calculus/sssssmqx"/>
      <lastmod>2026-11-02T18:34:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/no-solution-3-contradictory-conditions-in-geometry-and-calculus/sssssmqx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/no-solution-3-contradictory-conditions-in-geometry-and-calculus/sssssmqx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/no-solution-3-contradictory-conditions-in-geometry-and-calculus/sssssmqx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/no-solution-3-contradictory-conditions-in-geometry-and-calculus/sssssmqx"/>
      <lastmod>2026-11-02T18:34:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-integer-addition-on-the-number-line-by-geogebra-team/sssssmqi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-integer-addition-on-the-number-line-by-geogebra-team/sssssmqi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-integer-addition-on-the-number-line-by-geogebra-team/sssssmqi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-integer-addition-on-the-number-line-by-geogebra-team/sssssmqi"/>
      <lastmod>2026-11-01T21:51:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-integer-addition-on-the-number-line-by-geogebra-team/sssssmqi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-integer-addition-on-the-number-line-by-geogebra-team/sssssmqi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-integer-addition-on-the-number-line-by-geogebra-team/sssssmqi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-integer-addition-on-the-number-line-by-geogebra-team/sssssmqi"/>
      <lastmod>2026-11-01T21:51:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/percentage-calculation-geogebra-practice/sssssmqo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/percentage-calculation-geogebra-practice/sssssmqo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/percentage-calculation-geogebra-practice/sssssmqo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/percentage-calculation-geogebra-practice/sssssmqo"/>
      <lastmod>2026-11-01T22:57:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/percentage-calculation-geogebra-practice/sssssmqo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/percentage-calculation-geogebra-practice/sssssmqo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/percentage-calculation-geogebra-practice/sssssmqo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/percentage-calculation-geogebra-practice/sssssmqo"/>
      <lastmod>2026-11-01T22:57:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coronavirus-2020-exponential-growth-model/sssssm1s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coronavirus-2020-exponential-growth-model/sssssm1s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coronavirus-2020-exponential-growth-model/sssssm1s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coronavirus-2020-exponential-growth-model/sssssm1s"/>
      <lastmod>2026-11-01T19:22:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coronavirus-2020-exponential-growth-model/sssssm1s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coronavirus-2020-exponential-growth-model/sssssm1s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coronavirus-2020-exponential-growth-model/sssssm1s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coronavirus-2020-exponential-growth-model/sssssm1s"/>
      <lastmod>2026-11-01T19:22:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inverse-linear-functions/sssssm17</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inverse-linear-functions/sssssm17"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inverse-linear-functions/sssssm17"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inverse-linear-functions/sssssm17"/>
      <lastmod>2026-11-02T15:40:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inverse-linear-functions/sssssm17</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inverse-linear-functions/sssssm17"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inverse-linear-functions/sssssm17"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inverse-linear-functions/sssssm17"/>
      <lastmod>2026-11-02T15:40:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ambiguous-case-of-law-of-sines/sssssm1n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ambiguous-case-of-law-of-sines/sssssm1n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ambiguous-case-of-law-of-sines/sssssm1n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ambiguous-case-of-law-of-sines/sssssm1n"/>
      <lastmod>2026-11-02T15:52:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ambiguous-case-of-law-of-sines/sssssm1n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ambiguous-case-of-law-of-sines/sssssm1n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ambiguous-case-of-law-of-sines/sssssm1n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ambiguous-case-of-law-of-sines/sssssm1n"/>
      <lastmod>2026-11-02T15:52:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-calculation-of-rectangular-prism/sssssm12</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-calculation-of-rectangular-prism/sssssm12"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-calculation-of-rectangular-prism/sssssm12"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-calculation-of-rectangular-prism/sssssm12"/>
      <lastmod>2026-11-02T18:57:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-calculation-of-rectangular-prism/sssssm12</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-calculation-of-rectangular-prism/sssssm12"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-calculation-of-rectangular-prism/sssssm12"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-calculation-of-rectangular-prism/sssssm12"/>
      <lastmod>2026-11-02T18:57:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/10-3-vs-10-4-pattern-comparison-fractions-and-symmetry-in-islamic-geometric/sssssm1k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/10-3-vs-10-4-pattern-comparison-fractions-and-symmetry-in-islamic-geometric/sssssm1k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/10-3-vs-10-4-pattern-comparison-fractions-and-symmetry-in-islamic-geometric/sssssm1k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/10-3-vs-10-4-pattern-comparison-fractions-and-symmetry-in-islamic-geometric/sssssm1k"/>
      <lastmod>2026-11-01T21:06:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/10-3-vs-10-4-pattern-comparison-fractions-and-symmetry-in-islamic-geometric/sssssm1k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/10-3-vs-10-4-pattern-comparison-fractions-and-symmetry-in-islamic-geometric/sssssm1k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/10-3-vs-10-4-pattern-comparison-fractions-and-symmetry-in-islamic-geometric/sssssm1k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/10-3-vs-10-4-pattern-comparison-fractions-and-symmetry-in-islamic-geometric/sssssm1k"/>
      <lastmod>2026-11-01T21:06:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-addition-by-jennifer-north-morris/sssssm1z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-addition-by-jennifer-north-morris/sssssm1z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-addition-by-jennifer-north-morris/sssssm1z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-addition-by-jennifer-north-morris/sssssm1z"/>
      <lastmod>2026-11-02T13:14:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-addition-by-jennifer-north-morris/sssssm1z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-addition-by-jennifer-north-morris/sssssm1z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-addition-by-jennifer-north-morris/sssssm1z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-addition-by-jennifer-north-morris/sssssm1z"/>
      <lastmod>2026-11-02T13:14:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/combine-like-terms-interactive-practice/sssssm10</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/combine-like-terms-interactive-practice/sssssm10"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/combine-like-terms-interactive-practice/sssssm10"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/combine-like-terms-interactive-practice/sssssm10"/>
      <lastmod>2026-11-02T00:08:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/combine-like-terms-interactive-practice/sssssm10</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/combine-like-terms-interactive-practice/sssssm10"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/combine-like-terms-interactive-practice/sssssm10"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/combine-like-terms-interactive-practice/sssssm10"/>
      <lastmod>2026-11-02T00:08:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbolas-and-ellipses-construction/sssssm1d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbolas-and-ellipses-construction/sssssm1d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbolas-and-ellipses-construction/sssssm1d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbolas-and-ellipses-construction/sssssm1d"/>
      <lastmod>2026-11-02T18:19:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbolas-and-ellipses-construction/sssssm1d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbolas-and-ellipses-construction/sssssm1d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbolas-and-ellipses-construction/sssssm1d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbolas-and-ellipses-construction/sssssm1d"/>
      <lastmod>2026-11-02T18:19:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-paint-mixtures/sssssm1f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-paint-mixtures/sssssm1f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-paint-mixtures/sssssm1f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-paint-mixtures/sssssm1f"/>
      <lastmod>2026-11-02T00:45:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-paint-mixtures/sssssm1f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-paint-mixtures/sssssm1f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-paint-mixtures/sssssm1f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-paint-mixtures/sssssm1f"/>
      <lastmod>2026-11-02T00:45:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-a-rhombus-by-jill-casey/sssssm18</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-rhombus-by-jill-casey/sssssm18"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-rhombus-by-jill-casey/sssssm18"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-rhombus-by-jill-casey/sssssm18"/>
      <lastmod>2026-11-02T13:05:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-a-rhombus-by-jill-casey/sssssm18</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-rhombus-by-jill-casey/sssssm18"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-rhombus-by-jill-casey/sssssm18"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-rhombus-by-jill-casey/sssssm18"/>
      <lastmod>2026-11-02T13:05:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-triangle-centers/sssssm1u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-centers/sssssm1u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-triangle-centers/sssssm1u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-centers/sssssm1u"/>
      <lastmod>2026-11-01T23:59:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-triangle-centers/sssssm1u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-centers/sssssm1u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-triangle-centers/sssssm1u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-centers/sssssm1u"/>
      <lastmod>2026-11-01T23:59:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/escher-s-pegasus-tessellation-exploration/sssssm15</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/escher-s-pegasus-tessellation-exploration/sssssm15"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/escher-s-pegasus-tessellation-exploration/sssssm15"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/escher-s-pegasus-tessellation-exploration/sssssm15"/>
      <lastmod>2026-11-02T13:50:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/escher-s-pegasus-tessellation-exploration/sssssm15</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/escher-s-pegasus-tessellation-exploration/sssssm15"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/escher-s-pegasus-tessellation-exploration/sssssm15"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/escher-s-pegasus-tessellation-exploration/sssssm15"/>
      <lastmod>2026-11-02T13:50:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-and-quadratic-equations/sssssm1b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-and-quadratic-equations/sssssm1b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-and-quadratic-equations/sssssm1b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-and-quadratic-equations/sssssm1b"/>
      <lastmod>2026-11-02T17:57:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-and-quadratic-equations/sssssm1b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-and-quadratic-equations/sssssm1b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-and-quadratic-equations/sssssm1b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-and-quadratic-equations/sssssm1b"/>
      <lastmod>2026-11-02T17:57:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-definition-secant-approximating-tangent-dynamic-demo/sssssm13</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-definition-secant-approximating-tangent-dynamic-demo/sssssm13"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-definition-secant-approximating-tangent-dynamic-demo/sssssm13"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-definition-secant-approximating-tangent-dynamic-demo/sssssm13"/>
      <lastmod>2026-11-02T00:04:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-definition-secant-approximating-tangent-dynamic-demo/sssssm13</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-definition-secant-approximating-tangent-dynamic-demo/sssssm13"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-definition-secant-approximating-tangent-dynamic-demo/sssssm13"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-definition-secant-approximating-tangent-dynamic-demo/sssssm13"/>
      <lastmod>2026-11-02T00:04:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-performance-task/sssssm1q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-performance-task/sssssm1q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-performance-task/sssssm1q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-performance-task/sssssm1q"/>
      <lastmod>2026-11-02T16:41:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-performance-task/sssssm1q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-performance-task/sssssm1q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-performance-task/sssssm1q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-performance-task/sssssm1q"/>
      <lastmod>2026-11-02T16:41:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/approximating-square-roots-guess-test/sssssm11</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/approximating-square-roots-guess-test/sssssm11"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/approximating-square-roots-guess-test/sssssm11"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/approximating-square-roots-guess-test/sssssm11"/>
      <lastmod>2026-11-02T16:40:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/approximating-square-roots-guess-test/sssssm11</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/approximating-square-roots-guess-test/sssssm11"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/approximating-square-roots-guess-test/sssssm11"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/approximating-square-roots-guess-test/sssssm11"/>
      <lastmod>2026-11-02T16:40:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/phantom-graph-of-x-2-1-2/sssssm1m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-of-x-2-1-2/sssssm1m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-of-x-2-1-2/sssssm1m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-of-x-2-1-2/sssssm1m"/>
      <lastmod>2026-11-02T18:29:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/phantom-graph-of-x-2-1-2/sssssm1m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-of-x-2-1-2/sssssm1m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-of-x-2-1-2/sssssm1m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-of-x-2-1-2/sssssm1m"/>
      <lastmod>2026-11-02T18:29:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-symmetry/sssssm1j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-symmetry/sssssm1j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-symmetry/sssssm1j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-symmetry/sssssm1j"/>
      <lastmod>2026-11-02T08:57:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-symmetry/sssssm1j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-symmetry/sssssm1j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-symmetry/sssssm1j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-symmetry/sssssm1j"/>
      <lastmod>2026-11-02T08:57:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-number-demonstration/sssssm1p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-demonstration/sssssm1p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-demonstration/sssssm1p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-demonstration/sssssm1p"/>
      <lastmod>2026-11-01T21:12:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-number-demonstration/sssssm1p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-demonstration/sssssm1p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-demonstration/sssssm1p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-demonstration/sssssm1p"/>
      <lastmod>2026-11-01T21:12:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/power-of-super-symmetry/sssssm1w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/power-of-super-symmetry/sssssm1w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/power-of-super-symmetry/sssssm1w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/power-of-super-symmetry/sssssm1w"/>
      <lastmod>2026-11-01T23:28:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/power-of-super-symmetry/sssssm1w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/power-of-super-symmetry/sssssm1w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/power-of-super-symmetry/sssssm1w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/power-of-super-symmetry/sssssm1w"/>
      <lastmod>2026-11-01T23:28:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/standard-form-operations/sssssm16</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-form-operations/sssssm16"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-form-operations/sssssm16"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-form-operations/sssssm16"/>
      <lastmod>2026-11-01T19:00:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/standard-form-operations/sssssm16</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-form-operations/sssssm16"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-form-operations/sssssm16"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-form-operations/sssssm16"/>
      <lastmod>2026-11-01T19:00:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-critical-points-and-their-nature-using-hessian-matrix/sssssm1g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-critical-points-and-their-nature-using-hessian-matrix/sssssm1g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-critical-points-and-their-nature-using-hessian-matrix/sssssm1g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-critical-points-and-their-nature-using-hessian-matrix/sssssm1g"/>
      <lastmod>2026-11-02T02:27:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-critical-points-and-their-nature-using-hessian-matrix/sssssm1g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-critical-points-and-their-nature-using-hessian-matrix/sssssm1g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-critical-points-and-their-nature-using-hessian-matrix/sssssm1g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-critical-points-and-their-nature-using-hessian-matrix/sssssm1g"/>
      <lastmod>2026-11-02T02:27:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/printable-puzzles/sssssm19</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/printable-puzzles/sssssm19"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/printable-puzzles/sssssm19"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/printable-puzzles/sssssm19"/>
      <lastmod>2026-11-02T16:29:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/printable-puzzles/sssssm19</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/printable-puzzles/sssssm19"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/printable-puzzles/sssssm19"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/printable-puzzles/sssssm19"/>
      <lastmod>2026-11-02T16:29:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-x-y-ratio-given-linear-equation/sssssm1e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-x-y-ratio-given-linear-equation/sssssm1e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-x-y-ratio-given-linear-equation/sssssm1e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-x-y-ratio-given-linear-equation/sssssm1e"/>
      <lastmod>2026-11-01T21:36:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-x-y-ratio-given-linear-equation/sssssm1e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-x-y-ratio-given-linear-equation/sssssm1e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-x-y-ratio-given-linear-equation/sssssm1e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-x-y-ratio-given-linear-equation/sssssm1e"/>
      <lastmod>2026-11-01T21:36:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-construction-by-georg-wengler/sssssm1v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-construction-by-georg-wengler/sssssm1v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-construction-by-georg-wengler/sssssm1v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-construction-by-georg-wengler/sssssm1v"/>
      <lastmod>2026-11-02T00:05:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-construction-by-georg-wengler/sssssm1v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-construction-by-georg-wengler/sssssm1v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-construction-by-georg-wengler/sssssm1v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-construction-by-georg-wengler/sssssm1v"/>
      <lastmod>2026-11-02T00:05:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transforming-a-rectangle-into-a-square/sssssm14</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transforming-a-rectangle-into-a-square/sssssm14"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transforming-a-rectangle-into-a-square/sssssm14"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transforming-a-rectangle-into-a-square/sssssm14"/>
      <lastmod>2026-11-02T02:40:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transforming-a-rectangle-into-a-square/sssssm14</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transforming-a-rectangle-into-a-square/sssssm14"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transforming-a-rectangle-into-a-square/sssssm14"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transforming-a-rectangle-into-a-square/sssssm14"/>
      <lastmod>2026-11-02T02:40:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/post-it-activity/sssssm1l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/post-it-activity/sssssm1l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/post-it-activity/sssssm1l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/post-it-activity/sssssm1l"/>
      <lastmod>2026-11-01T23:18:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/post-it-activity/sssssm1l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/post-it-activity/sssssm1l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/post-it-activity/sssssm1l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/post-it-activity/sssssm1l"/>
      <lastmod>2026-11-01T23:18:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction/sssssm1y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction/sssssm1y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-construction/sssssm1y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction/sssssm1y"/>
      <lastmod>2026-11-01T20:53:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoid-construction/sssssm1y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction/sssssm1y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-construction/sssssm1y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction/sssssm1y"/>
      <lastmod>2026-11-01T20:53:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-median-of-4-points/sssssm1a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-median-of-4-points/sssssm1a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-median-of-4-points/sssssm1a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-median-of-4-points/sssssm1a"/>
      <lastmod>2026-11-02T17:40:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-median-of-4-points/sssssm1a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-median-of-4-points/sssssm1a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-median-of-4-points/sssssm1a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-median-of-4-points/sssssm1a"/>
      <lastmod>2026-11-02T17:40:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/year-11-methods-demo-revolution-about-the-x-axis/sssssm1c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/year-11-methods-demo-revolution-about-the-x-axis/sssssm1c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/year-11-methods-demo-revolution-about-the-x-axis/sssssm1c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/year-11-methods-demo-revolution-about-the-x-axis/sssssm1c"/>
      <lastmod>2026-11-01T21:29:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/year-11-methods-demo-revolution-about-the-x-axis/sssssm1c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/year-11-methods-demo-revolution-about-the-x-axis/sssssm1c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/year-11-methods-demo-revolution-about-the-x-axis/sssssm1c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/year-11-methods-demo-revolution-about-the-x-axis/sssssm1c"/>
      <lastmod>2026-11-01T21:29:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/order-of-operations-addition-multiplication-division/sssssm1r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/order-of-operations-addition-multiplication-division/sssssm1r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/order-of-operations-addition-multiplication-division/sssssm1r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/order-of-operations-addition-multiplication-division/sssssm1r"/>
      <lastmod>2026-11-02T18:46:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/order-of-operations-addition-multiplication-division/sssssm1r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/order-of-operations-addition-multiplication-division/sssssm1r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/order-of-operations-addition-multiplication-division/sssssm1r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/order-of-operations-addition-multiplication-division/sssssm1r"/>
      <lastmod>2026-11-02T18:46:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/example-of-derivatives/sssssm1h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/example-of-derivatives/sssssm1h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/example-of-derivatives/sssssm1h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/example-of-derivatives/sssssm1h"/>
      <lastmod>2026-11-02T00:39:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/example-of-derivatives/sssssm1h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/example-of-derivatives/sssssm1h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/example-of-derivatives/sssssm1h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/example-of-derivatives/sssssm1h"/>
      <lastmod>2026-11-02T00:39:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/riemann-sum-by-john-golden/sssssm1t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-sum-by-john-golden/sssssm1t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-sum-by-john-golden/sssssm1t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-sum-by-john-golden/sssssm1t"/>
      <lastmod>2026-11-02T17:02:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/riemann-sum-by-john-golden/sssssm1t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-sum-by-john-golden/sssssm1t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-sum-by-john-golden/sssssm1t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-sum-by-john-golden/sssssm1t"/>
      <lastmod>2026-11-02T17:02:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-terminology-exploration/sssssm1x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-terminology-exploration/sssssm1x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-terminology-exploration/sssssm1x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-terminology-exploration/sssssm1x"/>
      <lastmod>2026-11-02T16:30:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-terminology-exploration/sssssm1x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-terminology-exploration/sssssm1x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-terminology-exploration/sssssm1x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-terminology-exploration/sssssm1x"/>
      <lastmod>2026-11-02T16:30:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/matha-art-trigonometric-curves/sssssm1i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matha-art-trigonometric-curves/sssssm1i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matha-art-trigonometric-curves/sssssm1i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matha-art-trigonometric-curves/sssssm1i"/>
      <lastmod>2026-11-01T19:17:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/matha-art-trigonometric-curves/sssssm1i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matha-art-trigonometric-curves/sssssm1i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matha-art-trigonometric-curves/sssssm1i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matha-art-trigonometric-curves/sssssm1i"/>
      <lastmod>2026-11-01T19:17:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mapping-diagram-composition-adjust-arrows/sssssm1o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mapping-diagram-composition-adjust-arrows/sssssm1o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mapping-diagram-composition-adjust-arrows/sssssm1o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mapping-diagram-composition-adjust-arrows/sssssm1o"/>
      <lastmod>2026-11-02T00:48:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mapping-diagram-composition-adjust-arrows/sssssm1o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mapping-diagram-composition-adjust-arrows/sssssm1o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mapping-diagram-composition-adjust-arrows/sssssm1o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mapping-diagram-composition-adjust-arrows/sssssm1o"/>
      <lastmod>2026-11-02T00:48:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-exercise-5-for-grade-9/sssssmms</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-exercise-5-for-grade-9/sssssmms"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-exercise-5-for-grade-9/sssssmms"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-exercise-5-for-grade-9/sssssmms"/>
      <lastmod>2026-11-01T20:48:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-exercise-5-for-grade-9/sssssmms</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-exercise-5-for-grade-9/sssssmms"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-exercise-5-for-grade-9/sssssmms"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-exercise-5-for-grade-9/sssssmms"/>
      <lastmod>2026-11-01T20:48:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflections-mirror-images-of-polygons-and-circles/sssssmm7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-mirror-images-of-polygons-and-circles/sssssmm7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-mirror-images-of-polygons-and-circles/sssssmm7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-mirror-images-of-polygons-and-circles/sssssmm7"/>
      <lastmod>2026-11-02T18:45:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflections-mirror-images-of-polygons-and-circles/sssssmm7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-mirror-images-of-polygons-and-circles/sssssmm7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-mirror-images-of-polygons-and-circles/sssssmm7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-mirror-images-of-polygons-and-circles/sssssmm7"/>
      <lastmod>2026-11-02T18:45:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/open-top-box/sssssmmn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/open-top-box/sssssmmn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/open-top-box/sssssmmn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/open-top-box/sssssmmn"/>
      <lastmod>2026-11-02T15:13:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/open-top-box/sssssmmn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/open-top-box/sssssmmn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/open-top-box/sssssmmn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/open-top-box/sssssmmn"/>
      <lastmod>2026-11-02T15:13:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multivariable-taylor-polynomial/sssssmm2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multivariable-taylor-polynomial/sssssmm2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multivariable-taylor-polynomial/sssssmm2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multivariable-taylor-polynomial/sssssmm2"/>
      <lastmod>2026-11-01T21:21:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multivariable-taylor-polynomial/sssssmm2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multivariable-taylor-polynomial/sssssmm2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multivariable-taylor-polynomial/sssssmm2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multivariable-taylor-polynomial/sssssmm2"/>
      <lastmod>2026-11-01T21:21:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solve-f-x-g-x-for-linear-functions/sssssmmk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solve-f-x-g-x-for-linear-functions/sssssmmk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solve-f-x-g-x-for-linear-functions/sssssmmk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solve-f-x-g-x-for-linear-functions/sssssmmk"/>
      <lastmod>2026-11-02T08:38:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solve-f-x-g-x-for-linear-functions/sssssmmk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solve-f-x-g-x-for-linear-functions/sssssmmk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solve-f-x-g-x-for-linear-functions/sssssmmk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solve-f-x-g-x-for-linear-functions/sssssmmk"/>
      <lastmod>2026-11-02T08:38:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/estimation-confidence-intervals-and-tests-using-a-normal-distribution/sssssmmz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimation-confidence-intervals-and-tests-using-a-normal-distribution/sssssmmz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimation-confidence-intervals-and-tests-using-a-normal-distribution/sssssmmz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimation-confidence-intervals-and-tests-using-a-normal-distribution/sssssmmz"/>
      <lastmod>2026-11-01T23:50:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/estimation-confidence-intervals-and-tests-using-a-normal-distribution/sssssmmz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimation-confidence-intervals-and-tests-using-a-normal-distribution/sssssmmz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimation-confidence-intervals-and-tests-using-a-normal-distribution/sssssmmz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimation-confidence-intervals-and-tests-using-a-normal-distribution/sssssmmz"/>
      <lastmod>2026-11-01T23:50:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bisection-method-for-real-roots/sssssmm0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bisection-method-for-real-roots/sssssmm0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bisection-method-for-real-roots/sssssmm0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bisection-method-for-real-roots/sssssmm0"/>
      <lastmod>2026-11-02T02:37:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bisection-method-for-real-roots/sssssmm0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bisection-method-for-real-roots/sssssmm0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bisection-method-for-real-roots/sssssmm0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bisection-method-for-real-roots/sssssmm0"/>
      <lastmod>2026-11-02T02:37:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-number-polar-representations/sssssmmd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-polar-representations/sssssmmd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-polar-representations/sssssmmd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-polar-representations/sssssmmd"/>
      <lastmod>2026-11-02T18:08:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-number-polar-representations/sssssmmd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-polar-representations/sssssmmd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-polar-representations/sssssmmd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-polar-representations/sssssmmd"/>
      <lastmod>2026-11-02T18:08:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equivalent-sine-and-cosine-graphs/sssssmmf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-sine-and-cosine-graphs/sssssmmf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-sine-and-cosine-graphs/sssssmmf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-sine-and-cosine-graphs/sssssmmf"/>
      <lastmod>2026-11-02T17:11:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equivalent-sine-and-cosine-graphs/sssssmmf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-sine-and-cosine-graphs/sssssmmf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-sine-and-cosine-graphs/sssssmmf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-sine-and-cosine-graphs/sssssmmf"/>
      <lastmod>2026-11-02T17:11:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/special-properties-of-the-centroid/sssssmm8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-properties-of-the-centroid/sssssmm8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-properties-of-the-centroid/sssssmm8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-properties-of-the-centroid/sssssmm8"/>
      <lastmod>2026-11-01T21:28:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/special-properties-of-the-centroid/sssssmm8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-properties-of-the-centroid/sssssmm8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-properties-of-the-centroid/sssssmm8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-properties-of-the-centroid/sssssmm8"/>
      <lastmod>2026-11-01T21:28:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-and-midpoint-construction/sssssmmu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-and-midpoint-construction/sssssmmu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-and-midpoint-construction/sssssmmu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-and-midpoint-construction/sssssmmu"/>
      <lastmod>2026-11-01T23:49:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-and-midpoint-construction/sssssmmu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-and-midpoint-construction/sssssmmu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-and-midpoint-construction/sssssmmu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-and-midpoint-construction/sssssmmu"/>
      <lastmod>2026-11-01T23:49:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fatih-sultan-mehmet-han-geometric-construction/sssssmm5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fatih-sultan-mehmet-han-geometric-construction/sssssmm5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fatih-sultan-mehmet-han-geometric-construction/sssssmm5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fatih-sultan-mehmet-han-geometric-construction/sssssmm5"/>
      <lastmod>2026-11-01T19:33:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fatih-sultan-mehmet-han-geometric-construction/sssssmm5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fatih-sultan-mehmet-han-geometric-construction/sssssmm5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fatih-sultan-mehmet-han-geometric-construction/sssssmm5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fatih-sultan-mehmet-han-geometric-construction/sssssmm5"/>
      <lastmod>2026-11-01T19:33:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/horizontal-and-vertical-translation-activity/sssssmmb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-and-vertical-translation-activity/sssssmmb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-and-vertical-translation-activity/sssssmmb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-and-vertical-translation-activity/sssssmmb"/>
      <lastmod>2026-11-01T20:37:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/horizontal-and-vertical-translation-activity/sssssmmb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-and-vertical-translation-activity/sssssmmb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-and-vertical-translation-activity/sssssmmb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-and-vertical-translation-activity/sssssmmb"/>
      <lastmod>2026-11-01T20:37:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-a-solid-of-revolution/sssssmm3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-solid-of-revolution/sssssmm3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-solid-of-revolution/sssssmm3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-solid-of-revolution/sssssmm3"/>
      <lastmod>2026-11-02T07:31:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-a-solid-of-revolution/sssssmm3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-solid-of-revolution/sssssmm3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-solid-of-revolution/sssssmm3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-solid-of-revolution/sssssmm3"/>
      <lastmod>2026-11-02T07:31:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-function-amplitude-and-period/sssssmmq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-function-amplitude-and-period/sssssmmq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-function-amplitude-and-period/sssssmmq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-function-amplitude-and-period/sssssmmq"/>
      <lastmod>2026-11-02T12:05:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-function-amplitude-and-period/sssssmmq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-function-amplitude-and-period/sssssmmq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-function-amplitude-and-period/sssssmmq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-function-amplitude-and-period/sssssmmq"/>
      <lastmod>2026-11-02T12:05:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/piecewise-constant-function-graph-visualizing-domain-and-range/sssssmm1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/piecewise-constant-function-graph-visualizing-domain-and-range/sssssmm1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/piecewise-constant-function-graph-visualizing-domain-and-range/sssssmm1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/piecewise-constant-function-graph-visualizing-domain-and-range/sssssmm1"/>
      <lastmod>2026-11-01T19:02:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/piecewise-constant-function-graph-visualizing-domain-and-range/sssssmm1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/piecewise-constant-function-graph-visualizing-domain-and-range/sssssmm1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/piecewise-constant-function-graph-visualizing-domain-and-range/sssssmm1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/piecewise-constant-function-graph-visualizing-domain-and-range/sssssmm1"/>
      <lastmod>2026-11-01T19:02:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/apple-surface/sssssmmm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/apple-surface/sssssmmm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/apple-surface/sssssmmm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/apple-surface/sssssmmm"/>
      <lastmod>2026-11-01T19:29:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/apple-surface/sssssmmm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/apple-surface/sssssmmm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/apple-surface/sssssmmm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/apple-surface/sssssmmm"/>
      <lastmod>2026-11-01T19:29:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/combining-like-terms-practice-part-3/sssssmmj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/combining-like-terms-practice-part-3/sssssmmj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/combining-like-terms-practice-part-3/sssssmmj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/combining-like-terms-practice-part-3/sssssmmj"/>
      <lastmod>2026-11-01T20:17:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/combining-like-terms-practice-part-3/sssssmmj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/combining-like-terms-practice-part-3/sssssmmj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/combining-like-terms-practice-part-3/sssssmmj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/combining-like-terms-practice-part-3/sssssmmj"/>
      <lastmod>2026-11-01T20:17:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-and-subtraction-simulation-by-dixiemath/sssssmmp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-and-subtraction-simulation-by-dixiemath/sssssmmp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-and-subtraction-simulation-by-dixiemath/sssssmmp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-and-subtraction-simulation-by-dixiemath/sssssmmp"/>
      <lastmod>2026-11-01T19:29:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-and-subtraction-simulation-by-dixiemath/sssssmmp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-and-subtraction-simulation-by-dixiemath/sssssmmp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-and-subtraction-simulation-by-dixiemath/sssssmmp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-and-subtraction-simulation-by-dixiemath/sssssmmp"/>
      <lastmod>2026-11-01T19:29:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exercise-1-collect-organize-summarize-data/sssssmmw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-1-collect-organize-summarize-data/sssssmmw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-1-collect-organize-summarize-data/sssssmmw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-1-collect-organize-summarize-data/sssssmmw"/>
      <lastmod>2026-11-01T21:58:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exercise-1-collect-organize-summarize-data/sssssmmw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-1-collect-organize-summarize-data/sssssmmw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-1-collect-organize-summarize-data/sssssmmw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-1-collect-organize-summarize-data/sssssmmw"/>
      <lastmod>2026-11-01T21:58:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-through-3-random-points-vertex-in-square/sssssmm6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-through-3-random-points-vertex-in-square/sssssmm6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-through-3-random-points-vertex-in-square/sssssmm6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-through-3-random-points-vertex-in-square/sssssmm6"/>
      <lastmod>2026-11-01T19:26:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-through-3-random-points-vertex-in-square/sssssmm6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-through-3-random-points-vertex-in-square/sssssmm6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-through-3-random-points-vertex-in-square/sssssmm6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-through-3-random-points-vertex-in-square/sssssmm6"/>
      <lastmod>2026-11-01T19:26:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/euler-spiral-generation/sssssmmg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euler-spiral-generation/sssssmmg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euler-spiral-generation/sssssmmg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euler-spiral-generation/sssssmmg"/>
      <lastmod>2026-11-01T19:00:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/euler-spiral-generation/sssssmmg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euler-spiral-generation/sssssmmg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euler-spiral-generation/sssssmmg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euler-spiral-generation/sssssmmg"/>
      <lastmod>2026-11-01T19:00:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-and-geometric-construction-exploring-basic-properties-and-constructio/sssssmm9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-and-geometric-construction-exploring-basic-properties-and-constructio/sssssmm9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-and-geometric-construction-exploring-basic-properties-and-constructio/sssssmm9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-and-geometric-construction-exploring-basic-properties-and-constructio/sssssmm9"/>
      <lastmod>2026-11-02T02:34:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-and-geometric-construction-exploring-basic-properties-and-constructio/sssssmm9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-and-geometric-construction-exploring-basic-properties-and-constructio/sssssmm9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-and-geometric-construction-exploring-basic-properties-and-constructio/sssssmm9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-and-geometric-construction-exploring-basic-properties-and-constructio/sssssmm9"/>
      <lastmod>2026-11-02T02:34:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-the-lateral-surface-area-of-a-cylinder/sssssmme</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-lateral-surface-area-of-a-cylinder/sssssmme"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-lateral-surface-area-of-a-cylinder/sssssmme"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-lateral-surface-area-of-a-cylinder/sssssmme"/>
      <lastmod>2026-11-01T20:49:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-the-lateral-surface-area-of-a-cylinder/sssssmme</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-lateral-surface-area-of-a-cylinder/sssssmme"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-lateral-surface-area-of-a-cylinder/sssssmme"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-lateral-surface-area-of-a-cylinder/sssssmme"/>
      <lastmod>2026-11-01T20:49:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/number-line-mental-addition-subtraction/sssssmmv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-line-mental-addition-subtraction/sssssmmv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-line-mental-addition-subtraction/sssssmmv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-line-mental-addition-subtraction/sssssmmv"/>
      <lastmod>2026-11-02T10:55:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/number-line-mental-addition-subtraction/sssssmmv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-line-mental-addition-subtraction/sssssmmv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-line-mental-addition-subtraction/sssssmmv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-line-mental-addition-subtraction/sssssmmv"/>
      <lastmod>2026-11-02T10:55:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivatives-in-polar-coordinates/sssssmm4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivatives-in-polar-coordinates/sssssmm4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivatives-in-polar-coordinates/sssssmm4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivatives-in-polar-coordinates/sssssmm4"/>
      <lastmod>2026-11-02T12:49:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivatives-in-polar-coordinates/sssssmm4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivatives-in-polar-coordinates/sssssmm4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivatives-in-polar-coordinates/sssssmm4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivatives-in-polar-coordinates/sssssmm4"/>
      <lastmod>2026-11-02T12:49:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mathematical-construction-of-the-mercedes-logo/sssssmml</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mathematical-construction-of-the-mercedes-logo/sssssmml"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mathematical-construction-of-the-mercedes-logo/sssssmml"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mathematical-construction-of-the-mercedes-logo/sssssmml"/>
      <lastmod>2026-11-01T23:27:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mathematical-construction-of-the-mercedes-logo/sssssmml</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mathematical-construction-of-the-mercedes-logo/sssssmml"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mathematical-construction-of-the-mercedes-logo/sssssmml"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mathematical-construction-of-the-mercedes-logo/sssssmml"/>
      <lastmod>2026-11-01T23:27:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-construction-and-integral-demonstration/sssssmmy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-construction-and-integral-demonstration/sssssmmy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-construction-and-integral-demonstration/sssssmmy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-construction-and-integral-demonstration/sssssmmy"/>
      <lastmod>2026-11-01T21:26:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-construction-and-integral-demonstration/sssssmmy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-construction-and-integral-demonstration/sssssmmy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-construction-and-integral-demonstration/sssssmmy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-construction-and-integral-demonstration/sssssmmy"/>
      <lastmod>2026-11-01T21:26:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-philip-taylor/sssssmma</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-philip-taylor/sssssmma"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-philip-taylor/sssssmma"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-philip-taylor/sssssmma"/>
      <lastmod>2026-11-02T15:04:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-philip-taylor/sssssmma</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-philip-taylor/sssssmma"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-philip-taylor/sssssmma"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-philip-taylor/sssssmma"/>
      <lastmod>2026-11-02T15:04:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spherical-volume-geometric-construction-and-visualization/sssssmmc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-volume-geometric-construction-and-visualization/sssssmmc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-volume-geometric-construction-and-visualization/sssssmmc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-volume-geometric-construction-and-visualization/sssssmmc"/>
      <lastmod>2026-11-01T21:29:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spherical-volume-geometric-construction-and-visualization/sssssmmc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-volume-geometric-construction-and-visualization/sssssmmc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-volume-geometric-construction-and-visualization/sssssmmc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-volume-geometric-construction-and-visualization/sssssmmc"/>
      <lastmod>2026-11-01T21:29:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-ratio-introducing-trigonometry-through-context/sssssmmr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-ratio-introducing-trigonometry-through-context/sssssmmr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-ratio-introducing-trigonometry-through-context/sssssmmr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-ratio-introducing-trigonometry-through-context/sssssmmr"/>
      <lastmod>2026-11-02T02:27:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-ratio-introducing-trigonometry-through-context/sssssmmr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-ratio-introducing-trigonometry-through-context/sssssmmr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-ratio-introducing-trigonometry-through-context/sssssmmr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-ratio-introducing-trigonometry-through-context/sssssmmr"/>
      <lastmod>2026-11-02T02:27:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/piecewise-defined-function-limits-3/sssssmmh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/piecewise-defined-function-limits-3/sssssmmh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/piecewise-defined-function-limits-3/sssssmmh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/piecewise-defined-function-limits-3/sssssmmh"/>
      <lastmod>2026-11-02T00:57:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/piecewise-defined-function-limits-3/sssssmmh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/piecewise-defined-function-limits-3/sssssmmh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/piecewise-defined-function-limits-3/sssssmmh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/piecewise-defined-function-limits-3/sssssmmh"/>
      <lastmod>2026-11-02T00:57:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-optimization/sssssmmt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-optimization/sssssmmt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-optimization/sssssmmt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-optimization/sssssmmt"/>
      <lastmod>2026-11-02T10:43:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-optimization/sssssmmt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-optimization/sssssmmt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-optimization/sssssmmt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-optimization/sssssmmt"/>
      <lastmod>2026-11-02T10:43:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-pyramid-net/sssssmmx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-pyramid-net/sssssmmx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-pyramid-net/sssssmmx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-pyramid-net/sssssmmx"/>
      <lastmod>2026-11-02T18:58:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-pyramid-net/sssssmmx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-pyramid-net/sssssmmx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-pyramid-net/sssssmmx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-pyramid-net/sssssmmx"/>
      <lastmod>2026-11-02T18:58:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/decimal-division-1-2-2/sssssmmi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-division-1-2-2/sssssmmi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-division-1-2-2/sssssmmi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-division-1-2-2/sssssmmi"/>
      <lastmod>2026-11-01T23:35:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/decimal-division-1-2-2/sssssmmi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-division-1-2-2/sssssmmi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-division-1-2-2/sssssmmi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-division-1-2-2/sssssmmi"/>
      <lastmod>2026-11-01T23:35:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-subtraction-practice-by-kitkun-roskaen/sssssmmo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-subtraction-practice-by-kitkun-roskaen/sssssmmo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-subtraction-practice-by-kitkun-roskaen/sssssmmo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-subtraction-practice-by-kitkun-roskaen/sssssmmo"/>
      <lastmod>2026-11-02T16:35:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-subtraction-practice-by-kitkun-roskaen/sssssmmo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-subtraction-practice-by-kitkun-roskaen/sssssmmo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-subtraction-practice-by-kitkun-roskaen/sssssmmo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-subtraction-practice-by-kitkun-roskaen/sssssmmo"/>
      <lastmod>2026-11-02T16:35:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-euler-s-line/sssssmjs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-euler-s-line/sssssmjs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-euler-s-line/sssssmjs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-euler-s-line/sssssmjs"/>
      <lastmod>2026-11-02T16:30:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-euler-s-line/sssssmjs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-euler-s-line/sssssmjs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-euler-s-line/sssssmjs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-euler-s-line/sssssmjs"/>
      <lastmod>2026-11-02T16:30:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-distribution-calculation-demonstration/sssssmj7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-distribution-calculation-demonstration/sssssmj7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-distribution-calculation-demonstration/sssssmj7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-distribution-calculation-demonstration/sssssmj7"/>
      <lastmod>2026-11-01T20:46:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-distribution-calculation-demonstration/sssssmj7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-distribution-calculation-demonstration/sssssmj7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-distribution-calculation-demonstration/sssssmj7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-distribution-calculation-demonstration/sssssmj7"/>
      <lastmod>2026-11-01T20:46:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adjustable-triangular-prism-by-ms-muusse/sssssmjn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adjustable-triangular-prism-by-ms-muusse/sssssmjn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adjustable-triangular-prism-by-ms-muusse/sssssmjn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adjustable-triangular-prism-by-ms-muusse/sssssmjn"/>
      <lastmod>2026-11-02T03:08:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adjustable-triangular-prism-by-ms-muusse/sssssmjn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adjustable-triangular-prism-by-ms-muusse/sssssmjn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adjustable-triangular-prism-by-ms-muusse/sssssmjn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adjustable-triangular-prism-by-ms-muusse/sssssmjn"/>
      <lastmod>2026-11-02T03:08:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-parallelogram-special-points-demo/sssssmj2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-parallelogram-special-points-demo/sssssmj2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-parallelogram-special-points-demo/sssssmj2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-parallelogram-special-points-demo/sssssmj2"/>
      <lastmod>2026-11-02T16:29:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-parallelogram-special-points-demo/sssssmj2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-parallelogram-special-points-demo/sssssmj2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-parallelogram-special-points-demo/sssssmj2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-parallelogram-special-points-demo/sssssmj2"/>
      <lastmod>2026-11-02T16:29:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-rectangular-prism/sssssmjk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-rectangular-prism/sssssmjk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-rectangular-prism/sssssmjk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-rectangular-prism/sssssmjk"/>
      <lastmod>2026-11-02T12:35:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-a-rectangular-prism/sssssmjk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-rectangular-prism/sssssmjk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-rectangular-prism/sssssmjk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-rectangular-prism/sssssmjk"/>
      <lastmod>2026-11-02T12:35:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cones-from-a-circle/sssssmjz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cones-from-a-circle/sssssmjz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cones-from-a-circle/sssssmjz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cones-from-a-circle/sssssmjz"/>
      <lastmod>2026-11-02T09:14:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cones-from-a-circle/sssssmjz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cones-from-a-circle/sssssmjz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cones-from-a-circle/sssssmjz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cones-from-a-circle/sssssmjz"/>
      <lastmod>2026-11-02T09:14:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/number-lines-for-negative-numbers/sssssmj0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-lines-for-negative-numbers/sssssmj0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-lines-for-negative-numbers/sssssmj0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-lines-for-negative-numbers/sssssmj0"/>
      <lastmod>2026-11-02T18:02:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/number-lines-for-negative-numbers/sssssmj0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-lines-for-negative-numbers/sssssmj0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-lines-for-negative-numbers/sssssmj0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-lines-for-negative-numbers/sssssmj0"/>
      <lastmod>2026-11-02T18:02:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-proof-of-sss-congruence-theorem/sssssmjd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-sss-congruence-theorem/sssssmjd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-proof-of-sss-congruence-theorem/sssssmjd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-sss-congruence-theorem/sssssmjd"/>
      <lastmod>2026-11-02T17:53:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-proof-of-sss-congruence-theorem/sssssmjd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-sss-congruence-theorem/sssssmjd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-proof-of-sss-congruence-theorem/sssssmjd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-sss-congruence-theorem/sssssmjd"/>
      <lastmod>2026-11-02T17:53:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mapping-diagram-of-derivatives/sssssmjf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mapping-diagram-of-derivatives/sssssmjf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mapping-diagram-of-derivatives/sssssmjf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mapping-diagram-of-derivatives/sssssmjf"/>
      <lastmod>2026-11-02T17:40:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mapping-diagram-of-derivatives/sssssmjf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mapping-diagram-of-derivatives/sssssmjf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mapping-diagram-of-derivatives/sssssmjf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mapping-diagram-of-derivatives/sssssmjf"/>
      <lastmod>2026-11-02T17:40:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformations-translations-of-polygons-and-solids/sssssmj8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-translations-of-polygons-and-solids/sssssmj8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-translations-of-polygons-and-solids/sssssmj8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-translations-of-polygons-and-solids/sssssmj8"/>
      <lastmod>2026-11-02T18:59:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformations-translations-of-polygons-and-solids/sssssmj8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-translations-of-polygons-and-solids/sssssmj8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-translations-of-polygons-and-solids/sssssmj8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-translations-of-polygons-and-solids/sssssmj8"/>
      <lastmod>2026-11-02T18:59:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/helix-and-derivatives/sssssmju</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/helix-and-derivatives/sssssmju"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/helix-and-derivatives/sssssmju"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/helix-and-derivatives/sssssmju"/>
      <lastmod>2026-11-02T00:38:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/helix-and-derivatives/sssssmju</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/helix-and-derivatives/sssssmju"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/helix-and-derivatives/sssssmju"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/helix-and-derivatives/sssssmju"/>
      <lastmod>2026-11-02T00:38:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fuel-efficiency-task/sssssmj5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fuel-efficiency-task/sssssmj5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fuel-efficiency-task/sssssmj5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fuel-efficiency-task/sssssmj5"/>
      <lastmod>2026-11-02T16:59:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fuel-efficiency-task/sssssmj5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fuel-efficiency-task/sssssmj5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fuel-efficiency-task/sssssmj5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fuel-efficiency-task/sssssmj5"/>
      <lastmod>2026-11-02T16:59:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/from-zero-to-sixty/sssssmjb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/from-zero-to-sixty/sssssmjb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/from-zero-to-sixty/sssssmjb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/from-zero-to-sixty/sssssmjb"/>
      <lastmod>2026-11-02T18:59:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/from-zero-to-sixty/sssssmjb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/from-zero-to-sixty/sssssmjb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/from-zero-to-sixty/sssssmjb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/from-zero-to-sixty/sssssmjb"/>
      <lastmod>2026-11-02T18:59:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-exploration-of-secant-slope-and-area-division-for-quadratic-function/sssssmj3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-secant-slope-and-area-division-for-quadratic-function/sssssmj3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-exploration-of-secant-slope-and-area-division-for-quadratic-function/sssssmj3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-secant-slope-and-area-division-for-quadratic-function/sssssmj3"/>
      <lastmod>2026-11-02T00:30:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-exploration-of-secant-slope-and-area-division-for-quadratic-function/sssssmj3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-secant-slope-and-area-division-for-quadratic-function/sssssmj3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-exploration-of-secant-slope-and-area-division-for-quadratic-function/sssssmj3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-secant-slope-and-area-division-for-quadratic-function/sssssmj3"/>
      <lastmod>2026-11-02T00:30:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spatial-motion-examples-interactive-3d-curves-and-geometric-transformations/sssssmjq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spatial-motion-examples-interactive-3d-curves-and-geometric-transformations/sssssmjq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spatial-motion-examples-interactive-3d-curves-and-geometric-transformations/sssssmjq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spatial-motion-examples-interactive-3d-curves-and-geometric-transformations/sssssmjq"/>
      <lastmod>2026-11-01T19:24:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spatial-motion-examples-interactive-3d-curves-and-geometric-transformations/sssssmjq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spatial-motion-examples-interactive-3d-curves-and-geometric-transformations/sssssmjq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spatial-motion-examples-interactive-3d-curves-and-geometric-transformations/sssssmjq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spatial-motion-examples-interactive-3d-curves-and-geometric-transformations/sssssmjq"/>
      <lastmod>2026-11-01T19:24:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-division-demo-n-a-b/sssssmj1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-division-demo-n-a-b/sssssmj1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-division-demo-n-a-b/sssssmj1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-division-demo-n-a-b/sssssmj1"/>
      <lastmod>2026-11-02T09:47:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-division-demo-n-a-b/sssssmj1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-division-demo-n-a-b/sssssmj1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-division-demo-n-a-b/sssssmj1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-division-demo-n-a-b/sssssmj1"/>
      <lastmod>2026-11-02T09:47:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/truchet-labyrinth-diagonals-construction-part-one/sssssmjm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truchet-labyrinth-diagonals-construction-part-one/sssssmjm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truchet-labyrinth-diagonals-construction-part-one/sssssmjm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truchet-labyrinth-diagonals-construction-part-one/sssssmjm"/>
      <lastmod>2026-11-01T19:10:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/truchet-labyrinth-diagonals-construction-part-one/sssssmjm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truchet-labyrinth-diagonals-construction-part-one/sssssmjm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truchet-labyrinth-diagonals-construction-part-one/sssssmjm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truchet-labyrinth-diagonals-construction-part-one/sssssmjm"/>
      <lastmod>2026-11-01T19:10:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/power-method-for-stochastic-matrices/sssssmjj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/power-method-for-stochastic-matrices/sssssmjj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/power-method-for-stochastic-matrices/sssssmjj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/power-method-for-stochastic-matrices/sssssmjj"/>
      <lastmod>2026-11-02T17:55:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/power-method-for-stochastic-matrices/sssssmjj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/power-method-for-stochastic-matrices/sssssmjj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/power-method-for-stochastic-matrices/sssssmjj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/power-method-for-stochastic-matrices/sssssmjj"/>
      <lastmod>2026-11-02T17:55:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-relationships-in-a-cyclic-quadrilateral/sssssmjp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-relationships-in-a-cyclic-quadrilateral/sssssmjp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-relationships-in-a-cyclic-quadrilateral/sssssmjp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-relationships-in-a-cyclic-quadrilateral/sssssmjp"/>
      <lastmod>2026-11-02T18:03:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-relationships-in-a-cyclic-quadrilateral/sssssmjp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-relationships-in-a-cyclic-quadrilateral/sssssmjp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-relationships-in-a-cyclic-quadrilateral/sssssmjp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-relationships-in-a-cyclic-quadrilateral/sssssmjp"/>
      <lastmod>2026-11-02T18:03:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-division-with-bar-models/sssssmjw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-division-with-bar-models/sssssmjw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-division-with-bar-models/sssssmjw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-division-with-bar-models/sssssmjw"/>
      <lastmod>2026-11-02T12:07:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-division-with-bar-models/sssssmjw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-division-with-bar-models/sssssmjw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-division-with-bar-models/sssssmjw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-division-with-bar-models/sssssmjw"/>
      <lastmod>2026-11-02T12:07:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/venn-diagram-of-real-numbers/sssssmj6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-of-real-numbers/sssssmj6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-of-real-numbers/sssssmj6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-of-real-numbers/sssssmj6"/>
      <lastmod>2026-11-02T00:50:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/venn-diagram-of-real-numbers/sssssmj6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-of-real-numbers/sssssmj6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-of-real-numbers/sssssmj6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-of-real-numbers/sssssmj6"/>
      <lastmod>2026-11-02T00:50:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-right-triangles-horizontal-alignment-problem/sssssmjg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-right-triangles-horizontal-alignment-problem/sssssmjg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-right-triangles-horizontal-alignment-problem/sssssmjg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-right-triangles-horizontal-alignment-problem/sssssmjg"/>
      <lastmod>2026-11-01T19:19:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-right-triangles-horizontal-alignment-problem/sssssmjg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-right-triangles-horizontal-alignment-problem/sssssmjg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-right-triangles-horizontal-alignment-problem/sssssmjg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-right-triangles-horizontal-alignment-problem/sssssmjg"/>
      <lastmod>2026-11-01T19:19:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fehr-problem-11-complex-intersection-of-disjoint-circles/sssssmj9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fehr-problem-11-complex-intersection-of-disjoint-circles/sssssmj9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fehr-problem-11-complex-intersection-of-disjoint-circles/sssssmj9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fehr-problem-11-complex-intersection-of-disjoint-circles/sssssmj9"/>
      <lastmod>2026-11-02T16:36:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fehr-problem-11-complex-intersection-of-disjoint-circles/sssssmj9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fehr-problem-11-complex-intersection-of-disjoint-circles/sssssmj9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fehr-problem-11-complex-intersection-of-disjoint-circles/sssssmj9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fehr-problem-11-complex-intersection-of-disjoint-circles/sssssmj9"/>
      <lastmod>2026-11-02T16:36:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-diagonal-properties/sssssmje</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-diagonal-properties/sssssmje"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-diagonal-properties/sssssmje"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-diagonal-properties/sssssmje"/>
      <lastmod>2026-11-02T18:59:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-diagonal-properties/sssssmje</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-diagonal-properties/sssssmje"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-diagonal-properties/sssssmje"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-diagonal-properties/sssssmje"/>
      <lastmod>2026-11-02T18:59:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/diameter-of-a-decagon/sssssmjv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diameter-of-a-decagon/sssssmjv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diameter-of-a-decagon/sssssmjv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diameter-of-a-decagon/sssssmjv"/>
      <lastmod>2026-11-02T02:36:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/diameter-of-a-decagon/sssssmjv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diameter-of-a-decagon/sssssmjv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diameter-of-a-decagon/sssssmjv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diameter-of-a-decagon/sssssmjv"/>
      <lastmod>2026-11-02T02:36:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-reflections-by-ashley-moss/sssssmj4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-reflections-by-ashley-moss/sssssmj4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-reflections-by-ashley-moss/sssssmj4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-reflections-by-ashley-moss/sssssmj4"/>
      <lastmod>2026-11-02T12:27:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-reflections-by-ashley-moss/sssssmj4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-reflections-by-ashley-moss/sssssmj4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-reflections-by-ashley-moss/sssssmj4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-reflections-by-ashley-moss/sssssmj4"/>
      <lastmod>2026-11-02T12:27:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/matrix-operations/sssssmjl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-operations/sssssmjl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-operations/sssssmjl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-operations/sssssmjl"/>
      <lastmod>2026-11-02T16:53:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/matrix-operations/sssssmjl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-operations/sssssmjl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-operations/sssssmjl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-operations/sssssmjl"/>
      <lastmod>2026-11-02T16:53:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-by-dontavis/sssssmjy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-by-dontavis/sssssmjy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-by-dontavis/sssssmjy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-by-dontavis/sssssmjy"/>
      <lastmod>2026-11-02T17:51:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-by-dontavis/sssssmjy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-by-dontavis/sssssmjy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-by-dontavis/sssssmjy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-by-dontavis/sssssmjy"/>
      <lastmod>2026-11-02T17:51:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prism-dispersion-demo/sssssmja</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-dispersion-demo/sssssmja"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-dispersion-demo/sssssmja"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-dispersion-demo/sssssmja"/>
      <lastmod>2026-11-01T20:50:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prism-dispersion-demo/sssssmja</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-dispersion-demo/sssssmja"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-dispersion-demo/sssssmja"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-dispersion-demo/sssssmja"/>
      <lastmod>2026-11-01T20:50:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/horizontal-hyperbola/sssssmjc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-hyperbola/sssssmjc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-hyperbola/sssssmjc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-hyperbola/sssssmjc"/>
      <lastmod>2026-11-02T16:32:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/horizontal-hyperbola/sssssmjc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-hyperbola/sssssmjc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-hyperbola/sssssmjc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-hyperbola/sssssmjc"/>
      <lastmod>2026-11-02T16:32:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cuisenaire-multiplication-visualizing-multiplication-with-colored-rods/sssssmjr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cuisenaire-multiplication-visualizing-multiplication-with-colored-rods/sssssmjr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cuisenaire-multiplication-visualizing-multiplication-with-colored-rods/sssssmjr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cuisenaire-multiplication-visualizing-multiplication-with-colored-rods/sssssmjr"/>
      <lastmod>2026-11-02T09:07:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cuisenaire-multiplication-visualizing-multiplication-with-colored-rods/sssssmjr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cuisenaire-multiplication-visualizing-multiplication-with-colored-rods/sssssmjr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cuisenaire-multiplication-visualizing-multiplication-with-colored-rods/sssssmjr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cuisenaire-multiplication-visualizing-multiplication-with-colored-rods/sssssmjr"/>
      <lastmod>2026-11-02T09:07:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/from-rectangle-to-square/sssssmjh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/from-rectangle-to-square/sssssmjh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/from-rectangle-to-square/sssssmjh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/from-rectangle-to-square/sssssmjh"/>
      <lastmod>2026-11-02T11:50:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/from-rectangle-to-square/sssssmjh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/from-rectangle-to-square/sssssmjh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/from-rectangle-to-square/sssssmjh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/from-rectangle-to-square/sssssmjh"/>
      <lastmod>2026-11-02T11:50:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-integers-by-jennifer-north-morris/sssssmjt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-integers-by-jennifer-north-morris/sssssmjt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-integers-by-jennifer-north-morris/sssssmjt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-integers-by-jennifer-north-morris/sssssmjt"/>
      <lastmod>2026-11-02T09:19:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-integers-by-jennifer-north-morris/sssssmjt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-integers-by-jennifer-north-morris/sssssmjt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-integers-by-jennifer-north-morris/sssssmjt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-integers-by-jennifer-north-morris/sssssmjt"/>
      <lastmod>2026-11-02T09:19:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-function-graph-investigation/sssssmjx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-function-graph-investigation/sssssmjx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-function-graph-investigation/sssssmjx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-function-graph-investigation/sssssmjx"/>
      <lastmod>2026-11-02T12:32:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-function-graph-investigation/sssssmjx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-function-graph-investigation/sssssmjx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-function-graph-investigation/sssssmjx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-function-graph-investigation/sssssmjx"/>
      <lastmod>2026-11-02T12:32:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/from-cube-to-sphere/sssssmji</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/from-cube-to-sphere/sssssmji"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/from-cube-to-sphere/sssssmji"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/from-cube-to-sphere/sssssmji"/>
      <lastmod>2026-11-02T00:01:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/from-cube-to-sphere/sssssmji</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/from-cube-to-sphere/sssssmji"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/from-cube-to-sphere/sssssmji"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/from-cube-to-sphere/sssssmji"/>
      <lastmod>2026-11-02T00:01:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/factoring-radical-expressions-practice/sssssmjo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factoring-radical-expressions-practice/sssssmjo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factoring-radical-expressions-practice/sssssmjo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factoring-radical-expressions-practice/sssssmjo"/>
      <lastmod>2026-11-02T09:27:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/factoring-radical-expressions-practice/sssssmjo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factoring-radical-expressions-practice/sssssmjo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factoring-radical-expressions-practice/sssssmjo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factoring-radical-expressions-practice/sssssmjo"/>
      <lastmod>2026-11-02T09:27:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/schlegel-diagram-icosahedron/sssssmps</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/schlegel-diagram-icosahedron/sssssmps"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/schlegel-diagram-icosahedron/sssssmps"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/schlegel-diagram-icosahedron/sssssmps"/>
      <lastmod>2026-11-02T10:49:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/schlegel-diagram-icosahedron/sssssmps</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/schlegel-diagram-icosahedron/sssssmps"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/schlegel-diagram-icosahedron/sssssmps"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/schlegel-diagram-icosahedron/sssssmps"/>
      <lastmod>2026-11-02T10:49:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/point-dilation/sssssmp7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-dilation/sssssmp7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-dilation/sssssmp7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-dilation/sssssmp7"/>
      <lastmod>2026-11-02T11:02:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/point-dilation/sssssmp7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-dilation/sssssmp7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-dilation/sssssmp7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-dilation/sssssmp7"/>
      <lastmod>2026-11-02T11:02:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/garbage-can-model/sssssmpn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/garbage-can-model/sssssmpn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/garbage-can-model/sssssmpn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/garbage-can-model/sssssmpn"/>
      <lastmod>2026-11-01T23:23:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/garbage-can-model/sssssmpn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/garbage-can-model/sssssmpn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/garbage-can-model/sssssmpn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/garbage-can-model/sssssmpn"/>
      <lastmod>2026-11-01T23:23:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/locating-decimals-on-a-number-line-2/sssssmp2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locating-decimals-on-a-number-line-2/sssssmp2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locating-decimals-on-a-number-line-2/sssssmp2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locating-decimals-on-a-number-line-2/sssssmp2"/>
      <lastmod>2026-11-02T03:04:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/locating-decimals-on-a-number-line-2/sssssmp2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locating-decimals-on-a-number-line-2/sssssmp2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locating-decimals-on-a-number-line-2/sssssmp2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locating-decimals-on-a-number-line-2/sssssmp2"/>
      <lastmod>2026-11-02T03:04:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mixed-number-demonstration/sssssmpk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mixed-number-demonstration/sssssmpk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mixed-number-demonstration/sssssmpk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mixed-number-demonstration/sssssmpk"/>
      <lastmod>2026-11-01T19:37:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mixed-number-demonstration/sssssmpk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mixed-number-demonstration/sssssmpk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mixed-number-demonstration/sssssmpk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mixed-number-demonstration/sssssmpk"/>
      <lastmod>2026-11-01T19:37:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-a-rectangular-prism/sssssmpz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-rectangular-prism/sssssmpz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-rectangular-prism/sssssmpz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-rectangular-prism/sssssmpz"/>
      <lastmod>2026-11-01T21:27:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-a-rectangular-prism/sssssmpz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-rectangular-prism/sssssmpz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-rectangular-prism/sssssmpz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-rectangular-prism/sssssmpz"/>
      <lastmod>2026-11-01T21:27:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/castle-del-monte-central-building-and-towers/sssssmp0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/castle-del-monte-central-building-and-towers/sssssmp0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/castle-del-monte-central-building-and-towers/sssssmp0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/castle-del-monte-central-building-and-towers/sssssmp0"/>
      <lastmod>2026-11-01T19:35:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/castle-del-monte-central-building-and-towers/sssssmp0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/castle-del-monte-central-building-and-towers/sssssmp0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/castle-del-monte-central-building-and-towers/sssssmp0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/castle-del-monte-central-building-and-towers/sssssmp0"/>
      <lastmod>2026-11-01T19:35:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/venn-diagram-with-intersection-and-union/sssssmpd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-with-intersection-and-union/sssssmpd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-with-intersection-and-union/sssssmpd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-with-intersection-and-union/sssssmpd"/>
      <lastmod>2026-11-01T20:45:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/venn-diagram-with-intersection-and-union/sssssmpd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-with-intersection-and-union/sssssmpd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-with-intersection-and-union/sssssmpd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-with-intersection-and-union/sssssmpd"/>
      <lastmod>2026-11-01T20:45:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/estimating-mean-from-a-frequency-table/sssssmpf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimating-mean-from-a-frequency-table/sssssmpf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimating-mean-from-a-frequency-table/sssssmpf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimating-mean-from-a-frequency-table/sssssmpf"/>
      <lastmod>2026-11-02T17:09:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/estimating-mean-from-a-frequency-table/sssssmpf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimating-mean-from-a-frequency-table/sssssmpf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimating-mean-from-a-frequency-table/sssssmpf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimating-mean-from-a-frequency-table/sssssmpf"/>
      <lastmod>2026-11-02T17:09:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/oblique-cylinder-by-co-daly/sssssmp8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-cylinder-by-co-daly/sssssmp8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-cylinder-by-co-daly/sssssmp8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-cylinder-by-co-daly/sssssmp8"/>
      <lastmod>2026-11-02T18:13:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/oblique-cylinder-by-co-daly/sssssmp8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-cylinder-by-co-daly/sssssmp8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-cylinder-by-co-daly/sssssmp8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-cylinder-by-co-daly/sssssmp8"/>
      <lastmod>2026-11-02T18:13:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotational-symmetry-demo/sssssmpu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-demo/sssssmpu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-demo/sssssmpu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-demo/sssssmpu"/>
      <lastmod>2026-11-01T21:50:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotational-symmetry-demo/sssssmpu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-demo/sssssmpu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-demo/sssssmpu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-demo/sssssmpu"/>
      <lastmod>2026-11-01T21:50:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-midpoints-construction/sssssmp5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-midpoints-construction/sssssmp5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-midpoints-construction/sssssmp5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-midpoints-construction/sssssmp5"/>
      <lastmod>2026-11-02T15:45:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-midpoints-construction/sssssmp5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-midpoints-construction/sssssmp5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-midpoints-construction/sssssmp5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-midpoints-construction/sssssmp5"/>
      <lastmod>2026-11-02T15:45:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-a-right-pyramid/sssssmpb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-right-pyramid/sssssmpb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-right-pyramid/sssssmpb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-right-pyramid/sssssmpb"/>
      <lastmod>2026-11-02T18:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-a-right-pyramid/sssssmpb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-right-pyramid/sssssmpb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-right-pyramid/sssssmpb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-right-pyramid/sssssmpb"/>
      <lastmod>2026-11-02T18:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-sine-rule-2/sssssmp3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-sine-rule-2/sssssmp3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-sine-rule-2/sssssmp3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-sine-rule-2/sssssmp3"/>
      <lastmod>2026-11-02T02:53:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-sine-rule-2/sssssmp3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-sine-rule-2/sssssmp3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-sine-rule-2/sssssmp3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-sine-rule-2/sssssmp3"/>
      <lastmod>2026-11-02T02:53:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-ratios/sssssmpq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-ratios/sssssmpq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-trigonometric-ratios/sssssmpq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-ratios/sssssmpq"/>
      <lastmod>2026-11-01T23:16:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-trigonometric-ratios/sssssmpq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-ratios/sssssmpq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-trigonometric-ratios/sssssmpq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-ratios/sssssmpq"/>
      <lastmod>2026-11-01T23:16:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-modern-mathematics/sssssmp1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-modern-mathematics/sssssmp1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-modern-mathematics/sssssmp1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-modern-mathematics/sssssmp1"/>
      <lastmod>2026-11-01T19:03:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-modern-mathematics/sssssmp1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-modern-mathematics/sssssmp1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-modern-mathematics/sssssmp1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-modern-mathematics/sssssmp1"/>
      <lastmod>2026-11-01T19:03:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/negative-integer-power-functions/sssssmpm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/negative-integer-power-functions/sssssmpm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/negative-integer-power-functions/sssssmpm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/negative-integer-power-functions/sssssmpm"/>
      <lastmod>2026-11-02T17:05:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/negative-integer-power-functions/sssssmpm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/negative-integer-power-functions/sssssmpm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/negative-integer-power-functions/sssssmpm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/negative-integer-power-functions/sssssmpm"/>
      <lastmod>2026-11-02T17:05:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/usual-fractions-demo/sssssmpj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/usual-fractions-demo/sssssmpj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/usual-fractions-demo/sssssmpj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/usual-fractions-demo/sssssmpj"/>
      <lastmod>2026-11-02T18:07:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/usual-fractions-demo/sssssmpj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/usual-fractions-demo/sssssmpj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/usual-fractions-demo/sssssmpj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/usual-fractions-demo/sssssmpj"/>
      <lastmod>2026-11-02T18:07:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/continuity-and-open-sets-work-in-progress/sssssmpp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/continuity-and-open-sets-work-in-progress/sssssmpp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/continuity-and-open-sets-work-in-progress/sssssmpp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/continuity-and-open-sets-work-in-progress/sssssmpp"/>
      <lastmod>2026-11-02T09:38:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/continuity-and-open-sets-work-in-progress/sssssmpp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/continuity-and-open-sets-work-in-progress/sssssmpp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/continuity-and-open-sets-work-in-progress/sssssmpp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/continuity-and-open-sets-work-in-progress/sssssmpp"/>
      <lastmod>2026-11-02T09:38:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-rule-part-3/sssssmpw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-rule-part-3/sssssmpw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-rule-part-3/sssssmpw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-rule-part-3/sssssmpw"/>
      <lastmod>2026-11-02T16:52:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-rule-part-3/sssssmpw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-rule-part-3/sssssmpw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-rule-part-3/sssssmpw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-rule-part-3/sssssmpw"/>
      <lastmod>2026-11-02T16:52:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-dilations-by-mrs-simon/sssssmp6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-dilations-by-mrs-simon/sssssmp6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-dilations-by-mrs-simon/sssssmp6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-dilations-by-mrs-simon/sssssmp6"/>
      <lastmod>2026-11-02T18:29:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-dilations-by-mrs-simon/sssssmp6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-dilations-by-mrs-simon/sssssmp6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-dilations-by-mrs-simon/sssssmp6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-dilations-by-mrs-simon/sssssmp6"/>
      <lastmod>2026-11-02T18:29:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-of-revolution-another-vase/sssssmpg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-another-vase/sssssmpg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-another-vase/sssssmpg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-another-vase/sssssmpg"/>
      <lastmod>2026-11-02T17:59:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-of-revolution-another-vase/sssssmpg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-another-vase/sssssmpg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-another-vase/sssssmpg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-another-vase/sssssmpg"/>
      <lastmod>2026-11-02T17:59:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-pyramid-rectangular-prism/sssssmp9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-pyramid-rectangular-prism/sssssmp9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-pyramid-rectangular-prism/sssssmp9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-pyramid-rectangular-prism/sssssmp9"/>
      <lastmod>2026-11-02T16:51:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-pyramid-rectangular-prism/sssssmp9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-pyramid-rectangular-prism/sssssmp9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-pyramid-rectangular-prism/sssssmp9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-pyramid-rectangular-prism/sssssmp9"/>
      <lastmod>2026-11-02T16:51:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilation-and-parabola-demonstration/sssssmpe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-and-parabola-demonstration/sssssmpe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-and-parabola-demonstration/sssssmpe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-and-parabola-demonstration/sssssmpe"/>
      <lastmod>2026-11-02T16:58:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilation-and-parabola-demonstration/sssssmpe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-and-parabola-demonstration/sssssmpe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-and-parabola-demonstration/sssssmpe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-and-parabola-demonstration/sssssmpe"/>
      <lastmod>2026-11-02T16:58:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-representation-of-complex-roots/sssssmpv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-representation-of-complex-roots/sssssmpv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-representation-of-complex-roots/sssssmpv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-representation-of-complex-roots/sssssmpv"/>
      <lastmod>2026-11-02T09:37:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-representation-of-complex-roots/sssssmpv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-representation-of-complex-roots/sssssmpv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-representation-of-complex-roots/sssssmpv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-representation-of-complex-roots/sssssmpv"/>
      <lastmod>2026-11-02T09:37:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ambiguous-case-of-law-of-sines-by-mark-gentry/sssssmp4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ambiguous-case-of-law-of-sines-by-mark-gentry/sssssmp4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ambiguous-case-of-law-of-sines-by-mark-gentry/sssssmp4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ambiguous-case-of-law-of-sines-by-mark-gentry/sssssmp4"/>
      <lastmod>2026-11-02T18:14:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ambiguous-case-of-law-of-sines-by-mark-gentry/sssssmp4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ambiguous-case-of-law-of-sines-by-mark-gentry/sssssmp4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ambiguous-case-of-law-of-sines-by-mark-gentry/sssssmp4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ambiguous-case-of-law-of-sines-by-mark-gentry/sssssmp4"/>
      <lastmod>2026-11-02T18:14:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hypothesis-testing/sssssmpl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hypothesis-testing/sssssmpl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hypothesis-testing/sssssmpl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hypothesis-testing/sssssmpl"/>
      <lastmod>2026-11-01T21:39:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hypothesis-testing/sssssmpl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hypothesis-testing/sssssmpl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hypothesis-testing/sssssmpl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hypothesis-testing/sssssmpl"/>
      <lastmod>2026-11-01T21:39:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-in-polar-coordinates-by-mathman1982/sssssmpy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-in-polar-coordinates-by-mathman1982/sssssmpy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-in-polar-coordinates-by-mathman1982/sssssmpy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-in-polar-coordinates-by-mathman1982/sssssmpy"/>
      <lastmod>2026-11-02T16:51:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-in-polar-coordinates-by-mathman1982/sssssmpy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-in-polar-coordinates-by-mathman1982/sssssmpy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-in-polar-coordinates-by-mathman1982/sssssmpy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-in-polar-coordinates-by-mathman1982/sssssmpy"/>
      <lastmod>2026-11-02T16:51:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-surface-area-calculation/sssssmpa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-surface-area-calculation/sssssmpa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-surface-area-calculation/sssssmpa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-surface-area-calculation/sssssmpa"/>
      <lastmod>2026-11-02T18:17:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-surface-area-calculation/sssssmpa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-surface-area-calculation/sssssmpa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-surface-area-calculation/sssssmpa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-surface-area-calculation/sssssmpa"/>
      <lastmod>2026-11-02T18:17:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezium-properties-investigation/sssssmpc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-properties-investigation/sssssmpc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-properties-investigation/sssssmpc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-properties-investigation/sssssmpc"/>
      <lastmod>2026-11-02T03:03:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezium-properties-investigation/sssssmpc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-properties-investigation/sssssmpc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-properties-investigation/sssssmpc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-properties-investigation/sssssmpc"/>
      <lastmod>2026-11-02T03:03:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/straight-line-in-space/sssssmpr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/straight-line-in-space/sssssmpr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/straight-line-in-space/sssssmpr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/straight-line-in-space/sssssmpr"/>
      <lastmod>2026-11-02T02:46:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/straight-line-in-space/sssssmpr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/straight-line-in-space/sssssmpr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/straight-line-in-space/sssssmpr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/straight-line-in-space/sssssmpr"/>
      <lastmod>2026-11-02T02:46:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/emphasizing-information-with-correspondence-rules-task/sssssmph</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/emphasizing-information-with-correspondence-rules-task/sssssmph"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/emphasizing-information-with-correspondence-rules-task/sssssmph"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/emphasizing-information-with-correspondence-rules-task/sssssmph"/>
      <lastmod>2026-11-02T15:03:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/emphasizing-information-with-correspondence-rules-task/sssssmph</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/emphasizing-information-with-correspondence-rules-task/sssssmph"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/emphasizing-information-with-correspondence-rules-task/sssssmph"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/emphasizing-information-with-correspondence-rules-task/sssssmph"/>
      <lastmod>2026-11-02T15:03:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-slider-animation/sssssmpt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-slider-animation/sssssmpt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-slider-animation/sssssmpt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-slider-animation/sssssmpt"/>
      <lastmod>2026-11-02T03:09:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-slider-animation/sssssmpt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-slider-animation/sssssmpt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-slider-animation/sssssmpt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-slider-animation/sssssmpt"/>
      <lastmod>2026-11-02T03:09:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/euclid-s-orchard-visualizing-fractions-and-sequences/sssssmpx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euclid-s-orchard-visualizing-fractions-and-sequences/sssssmpx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euclid-s-orchard-visualizing-fractions-and-sequences/sssssmpx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euclid-s-orchard-visualizing-fractions-and-sequences/sssssmpx"/>
      <lastmod>2026-11-02T00:52:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/euclid-s-orchard-visualizing-fractions-and-sequences/sssssmpx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euclid-s-orchard-visualizing-fractions-and-sequences/sssssmpx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euclid-s-orchard-visualizing-fractions-and-sequences/sssssmpx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euclid-s-orchard-visualizing-fractions-and-sequences/sssssmpx"/>
      <lastmod>2026-11-02T00:52:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/number-bar-20/sssssmpi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-bar-20/sssssmpi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-bar-20/sssssmpi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-bar-20/sssssmpi"/>
      <lastmod>2026-11-01T20:50:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/number-bar-20/sssssmpi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-bar-20/sssssmpi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-bar-20/sssssmpi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-bar-20/sssssmpi"/>
      <lastmod>2026-11-01T20:50:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-conic-sections/sssssmpo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-conic-sections/sssssmpo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-conic-sections/sssssmpo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-conic-sections/sssssmpo"/>
      <lastmod>2026-11-02T18:53:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-conic-sections/sssssmpo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-conic-sections/sssssmpo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-conic-sections/sssssmpo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-conic-sections/sssssmpo"/>
      <lastmod>2026-11-02T18:53:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/free-body-diagram-of-raising-a-mass/sssssmws</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/free-body-diagram-of-raising-a-mass/sssssmws"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/free-body-diagram-of-raising-a-mass/sssssmws"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/free-body-diagram-of-raising-a-mass/sssssmws"/>
      <lastmod>2026-11-02T12:39:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/free-body-diagram-of-raising-a-mass/sssssmws</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/free-body-diagram-of-raising-a-mass/sssssmws"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/free-body-diagram-of-raising-a-mass/sssssmws"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/free-body-diagram-of-raising-a-mass/sssssmws"/>
      <lastmod>2026-11-02T12:39:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstrating-pi/sssssmw7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-pi/sssssmw7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-pi/sssssmw7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-pi/sssssmw7"/>
      <lastmod>2026-11-02T18:08:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstrating-pi/sssssmw7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-pi/sssssmw7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-pi/sssssmw7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-pi/sssssmw7"/>
      <lastmod>2026-11-02T18:08:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-a-cone-and-a-cylinder/sssssmwn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-a-cone-and-a-cylinder/sssssmwn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-a-cone-and-a-cylinder/sssssmwn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-a-cone-and-a-cylinder/sssssmwn"/>
      <lastmod>2026-11-02T17:53:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-a-cone-and-a-cylinder/sssssmwn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-a-cone-and-a-cylinder/sssssmwn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-a-cone-and-a-cylinder/sssssmwn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-a-cone-and-a-cylinder/sssssmwn"/>
      <lastmod>2026-11-02T17:53:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-reflective-property-and-distance/sssssmw2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-reflective-property-and-distance/sssssmw2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-reflective-property-and-distance/sssssmw2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-reflective-property-and-distance/sssssmw2"/>
      <lastmod>2026-11-01T19:32:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-reflective-property-and-distance/sssssmw2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-reflective-property-and-distance/sssssmw2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-reflective-property-and-distance/sssssmw2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-reflective-property-and-distance/sssssmw2"/>
      <lastmod>2026-11-01T19:32:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-medians-and-the-centroid/sssssmwk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-medians-and-the-centroid/sssssmwk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-medians-and-the-centroid/sssssmwk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-medians-and-the-centroid/sssssmwk"/>
      <lastmod>2026-11-02T02:23:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-medians-and-the-centroid/sssssmwk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-medians-and-the-centroid/sssssmwk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-medians-and-the-centroid/sssssmwk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-medians-and-the-centroid/sssssmwk"/>
      <lastmod>2026-11-02T02:23:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ratio-problems-numerical-algebraic/sssssmwz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratio-problems-numerical-algebraic/sssssmwz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratio-problems-numerical-algebraic/sssssmwz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratio-problems-numerical-algebraic/sssssmwz"/>
      <lastmod>2026-11-01T21:27:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ratio-problems-numerical-algebraic/sssssmwz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratio-problems-numerical-algebraic/sssssmwz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratio-problems-numerical-algebraic/sssssmwz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratio-problems-numerical-algebraic/sssssmwz"/>
      <lastmod>2026-11-01T21:27:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/measure-the-area-of-a-polygon/sssssmw0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/measure-the-area-of-a-polygon/sssssmw0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/measure-the-area-of-a-polygon/sssssmw0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/measure-the-area-of-a-polygon/sssssmw0"/>
      <lastmod>2026-11-01T23:34:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/measure-the-area-of-a-polygon/sssssmw0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/measure-the-area-of-a-polygon/sssssmw0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/measure-the-area-of-a-polygon/sssssmw0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/measure-the-area-of-a-polygon/sssssmw0"/>
      <lastmod>2026-11-01T23:34:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-roots-of-unity-kopie-von-roots-of-unity/sssssmwd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-roots-of-unity-kopie-von-roots-of-unity/sssssmwd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-roots-of-unity-kopie-von-roots-of-unity/sssssmwd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-roots-of-unity-kopie-von-roots-of-unity/sssssmwd"/>
      <lastmod>2026-11-01T21:01:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-roots-of-unity-kopie-von-roots-of-unity/sssssmwd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-roots-of-unity-kopie-von-roots-of-unity/sssssmwd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-roots-of-unity-kopie-von-roots-of-unity/sssssmwd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-roots-of-unity-kopie-von-roots-of-unity/sssssmwd"/>
      <lastmod>2026-11-01T21:01:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/basic-geometric-constructions-right-triangles-and-sine-functions/sssssmwf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-geometric-constructions-right-triangles-and-sine-functions/sssssmwf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-geometric-constructions-right-triangles-and-sine-functions/sssssmwf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-geometric-constructions-right-triangles-and-sine-functions/sssssmwf"/>
      <lastmod>2026-11-02T00:15:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/basic-geometric-constructions-right-triangles-and-sine-functions/sssssmwf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-geometric-constructions-right-triangles-and-sine-functions/sssssmwf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-geometric-constructions-right-triangles-and-sine-functions/sssssmwf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-geometric-constructions-right-triangles-and-sine-functions/sssssmwf"/>
      <lastmod>2026-11-02T00:15:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-transformations-and-polygons/sssssmw8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-polygons/sssssmw8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-and-polygons/sssssmw8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-polygons/sssssmw8"/>
      <lastmod>2026-11-01T20:54:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-transformations-and-polygons/sssssmw8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-polygons/sssssmw8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-and-polygons/sssssmw8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-polygons/sssssmw8"/>
      <lastmod>2026-11-01T20:54:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/points-on-the-number-line-by-geogebra-classroom-activities/sssssmwu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/points-on-the-number-line-by-geogebra-classroom-activities/sssssmwu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/points-on-the-number-line-by-geogebra-classroom-activities/sssssmwu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/points-on-the-number-line-by-geogebra-classroom-activities/sssssmwu"/>
      <lastmod>2026-11-02T10:35:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/points-on-the-number-line-by-geogebra-classroom-activities/sssssmwu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/points-on-the-number-line-by-geogebra-classroom-activities/sssssmwu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/points-on-the-number-line-by-geogebra-classroom-activities/sssssmwu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/points-on-the-number-line-by-geogebra-classroom-activities/sssssmwu"/>
      <lastmod>2026-11-02T10:35:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombic-rosette/sssssmw5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombic-rosette/sssssmw5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombic-rosette/sssssmw5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombic-rosette/sssssmw5"/>
      <lastmod>2026-11-01T23:08:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombic-rosette/sssssmw5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombic-rosette/sssssmw5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombic-rosette/sssssmw5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombic-rosette/sssssmw5"/>
      <lastmod>2026-11-01T23:08:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-explanation-of-the-sign-of-a-product-of-two-numbers/sssssmwb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-explanation-of-the-sign-of-a-product-of-two-numbers/sssssmwb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-explanation-of-the-sign-of-a-product-of-two-numbers/sssssmwb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-explanation-of-the-sign-of-a-product-of-two-numbers/sssssmwb"/>
      <lastmod>2026-11-02T18:02:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-explanation-of-the-sign-of-a-product-of-two-numbers/sssssmwb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-explanation-of-the-sign-of-a-product-of-two-numbers/sssssmwb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-explanation-of-the-sign-of-a-product-of-two-numbers/sssssmwb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-explanation-of-the-sign-of-a-product-of-two-numbers/sssssmwb"/>
      <lastmod>2026-11-02T18:02:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/irrational-numbers-sqrt5/sssssmw3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/irrational-numbers-sqrt5/sssssmw3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/irrational-numbers-sqrt5/sssssmw3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/irrational-numbers-sqrt5/sssssmw3"/>
      <lastmod>2026-11-02T02:46:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/irrational-numbers-sqrt5/sssssmw3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/irrational-numbers-sqrt5/sssssmw3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/irrational-numbers-sqrt5/sssssmw3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/irrational-numbers-sqrt5/sssssmw3"/>
      <lastmod>2026-11-02T02:46:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/nets-of-a-tetrahedron-by-dr-dunphy/sssssmwq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nets-of-a-tetrahedron-by-dr-dunphy/sssssmwq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nets-of-a-tetrahedron-by-dr-dunphy/sssssmwq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nets-of-a-tetrahedron-by-dr-dunphy/sssssmwq"/>
      <lastmod>2026-11-02T17:46:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/nets-of-a-tetrahedron-by-dr-dunphy/sssssmwq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nets-of-a-tetrahedron-by-dr-dunphy/sssssmwq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nets-of-a-tetrahedron-by-dr-dunphy/sssssmwq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nets-of-a-tetrahedron-by-dr-dunphy/sssssmwq"/>
      <lastmod>2026-11-02T17:46:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-conversion-from-mixed-number-to-improper-fraction/sssssmw1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-conversion-from-mixed-number-to-improper-fraction/sssssmw1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-conversion-from-mixed-number-to-improper-fraction/sssssmw1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-conversion-from-mixed-number-to-improper-fraction/sssssmw1"/>
      <lastmod>2026-11-02T18:52:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-conversion-from-mixed-number-to-improper-fraction/sssssmw1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-conversion-from-mixed-number-to-improper-fraction/sssssmw1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-conversion-from-mixed-number-to-improper-fraction/sssssmw1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-conversion-from-mixed-number-to-improper-fraction/sssssmw1"/>
      <lastmod>2026-11-02T18:52:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-linear-equation-from-any-two-points/sssssmwm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-linear-equation-from-any-two-points/sssssmwm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-linear-equation-from-any-two-points/sssssmwm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-linear-equation-from-any-two-points/sssssmwm"/>
      <lastmod>2026-11-02T16:50:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-linear-equation-from-any-two-points/sssssmwm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-linear-equation-from-any-two-points/sssssmwm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-linear-equation-from-any-two-points/sssssmwm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-linear-equation-from-any-two-points/sssssmwm"/>
      <lastmod>2026-11-02T16:50:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dodecahedron-as-a-planar-graph/sssssmwj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dodecahedron-as-a-planar-graph/sssssmwj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dodecahedron-as-a-planar-graph/sssssmwj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dodecahedron-as-a-planar-graph/sssssmwj"/>
      <lastmod>2026-11-02T18:44:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dodecahedron-as-a-planar-graph/sssssmwj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dodecahedron-as-a-planar-graph/sssssmwj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dodecahedron-as-a-planar-graph/sssssmwj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dodecahedron-as-a-planar-graph/sssssmwj"/>
      <lastmod>2026-11-02T18:44:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/differentiation-from-first-principles-secant-slope-approaching-tangent-slope/sssssmwp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/differentiation-from-first-principles-secant-slope-approaching-tangent-slope/sssssmwp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/differentiation-from-first-principles-secant-slope-approaching-tangent-slope/sssssmwp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/differentiation-from-first-principles-secant-slope-approaching-tangent-slope/sssssmwp"/>
      <lastmod>2026-11-02T18:10:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/differentiation-from-first-principles-secant-slope-approaching-tangent-slope/sssssmwp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/differentiation-from-first-principles-secant-slope-approaching-tangent-slope/sssssmwp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/differentiation-from-first-principles-secant-slope-approaching-tangent-slope/sssssmwp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/differentiation-from-first-principles-secant-slope-approaching-tangent-slope/sssssmwp"/>
      <lastmod>2026-11-02T18:10:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-y-mx-b/sssssmww</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-y-mx-b/sssssmww"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-y-mx-b/sssssmww"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-y-mx-b/sssssmww"/>
      <lastmod>2026-11-01T23:36:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-y-mx-b/sssssmww</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-y-mx-b/sssssmww"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-y-mx-b/sssssmww"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-y-mx-b/sssssmww"/>
      <lastmod>2026-11-01T23:36:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-mid-segment-2-discoveries/sssssmw6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-mid-segment-2-discoveries/sssssmw6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-mid-segment-2-discoveries/sssssmw6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-mid-segment-2-discoveries/sssssmw6"/>
      <lastmod>2026-11-02T09:47:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-mid-segment-2-discoveries/sssssmw6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-mid-segment-2-discoveries/sssssmw6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-mid-segment-2-discoveries/sssssmw6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-mid-segment-2-discoveries/sssssmw6"/>
      <lastmod>2026-11-02T09:47:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/phantom-graph-of-y-x-2-x-1/sssssmwg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-of-y-x-2-x-1/sssssmwg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-of-y-x-2-x-1/sssssmwg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-of-y-x-2-x-1/sssssmwg"/>
      <lastmod>2026-11-02T18:30:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/phantom-graph-of-y-x-2-x-1/sssssmwg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-of-y-x-2-x-1/sssssmwg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-of-y-x-2-x-1/sssssmwg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-of-y-x-2-x-1/sssssmwg"/>
      <lastmod>2026-11-02T18:30:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/roman-numeral-system-demo/sssssmw9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roman-numeral-system-demo/sssssmw9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roman-numeral-system-demo/sssssmw9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roman-numeral-system-demo/sssssmw9"/>
      <lastmod>2026-11-02T18:23:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/roman-numeral-system-demo/sssssmw9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roman-numeral-system-demo/sssssmw9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roman-numeral-system-demo/sssssmw9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roman-numeral-system-demo/sssssmw9"/>
      <lastmod>2026-11-02T18:23:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-guess/sssssmwe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-guess/sssssmwe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-guess/sssssmwe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-guess/sssssmwe"/>
      <lastmod>2026-11-02T18:50:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-guess/sssssmwe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-guess/sssssmwe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-guess/sssssmwe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-guess/sssssmwe"/>
      <lastmod>2026-11-02T18:50:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ratios-of-areas-of-8-gons/sssssmwv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratios-of-areas-of-8-gons/sssssmwv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratios-of-areas-of-8-gons/sssssmwv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratios-of-areas-of-8-gons/sssssmwv"/>
      <lastmod>2026-11-02T18:27:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ratios-of-areas-of-8-gons/sssssmwv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratios-of-areas-of-8-gons/sssssmwv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratios-of-areas-of-8-gons/sssssmwv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratios-of-areas-of-8-gons/sssssmwv"/>
      <lastmod>2026-11-02T18:27:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/roller-coaster-function-graph-and-calculus-demo/sssssmw4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roller-coaster-function-graph-and-calculus-demo/sssssmw4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roller-coaster-function-graph-and-calculus-demo/sssssmw4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roller-coaster-function-graph-and-calculus-demo/sssssmw4"/>
      <lastmod>2026-11-01T21:16:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/roller-coaster-function-graph-and-calculus-demo/sssssmw4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roller-coaster-function-graph-and-calculus-demo/sssssmw4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roller-coaster-function-graph-and-calculus-demo/sssssmw4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roller-coaster-function-graph-and-calculus-demo/sssssmw4"/>
      <lastmod>2026-11-01T21:16:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-the-wallace-simson-line/sssssmwl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-the-wallace-simson-line/sssssmwl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-the-wallace-simson-line/sssssmwl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-the-wallace-simson-line/sssssmwl"/>
      <lastmod>2026-11-01T22:00:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-the-wallace-simson-line/sssssmwl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-the-wallace-simson-line/sssssmwl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-the-wallace-simson-line/sssssmwl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-the-wallace-simson-line/sssssmwl"/>
      <lastmod>2026-11-01T22:00:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-center-in-a-cube/sssssmwy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-center-in-a-cube/sssssmwy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-center-in-a-cube/sssssmwy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-center-in-a-cube/sssssmwy"/>
      <lastmod>2026-11-01T19:23:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-center-in-a-cube/sssssmwy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-center-in-a-cube/sssssmwy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-center-in-a-cube/sssssmwy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-center-in-a-cube/sssssmwy"/>
      <lastmod>2026-11-01T19:23:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-exponential-functions-by-amanda-spindler/sssssmwa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-exponential-functions-by-amanda-spindler/sssssmwa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-exponential-functions-by-amanda-spindler/sssssmwa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-exponential-functions-by-amanda-spindler/sssssmwa"/>
      <lastmod>2026-11-02T15:05:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-exponential-functions-by-amanda-spindler/sssssmwa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-exponential-functions-by-amanda-spindler/sssssmwa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-exponential-functions-by-amanda-spindler/sssssmwa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-exponential-functions-by-amanda-spindler/sssssmwa"/>
      <lastmod>2026-11-02T15:05:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/distance-between-two-lines-by-geogebra-team/sssssmwc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-between-two-lines-by-geogebra-team/sssssmwc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-between-two-lines-by-geogebra-team/sssssmwc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-between-two-lines-by-geogebra-team/sssssmwc"/>
      <lastmod>2026-11-02T09:28:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/distance-between-two-lines-by-geogebra-team/sssssmwc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-between-two-lines-by-geogebra-team/sssssmwc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-between-two-lines-by-geogebra-team/sssssmwc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-between-two-lines-by-geogebra-team/sssssmwc"/>
      <lastmod>2026-11-02T09:28:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-translation-multiplication-and-rotation/sssssmwr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-translation-multiplication-and-rotation/sssssmwr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-translation-multiplication-and-rotation/sssssmwr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-translation-multiplication-and-rotation/sssssmwr"/>
      <lastmod>2026-11-01T21:11:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-translation-multiplication-and-rotation/sssssmwr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-translation-multiplication-and-rotation/sssssmwr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-translation-multiplication-and-rotation/sssssmwr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-translation-multiplication-and-rotation/sssssmwr"/>
      <lastmod>2026-11-01T21:11:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-and-oblique-cylinders/sssssmwh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-and-oblique-cylinders/sssssmwh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-and-oblique-cylinders/sssssmwh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-and-oblique-cylinders/sssssmwh"/>
      <lastmod>2026-11-02T18:13:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-and-oblique-cylinders/sssssmwh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-and-oblique-cylinders/sssssmwh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-and-oblique-cylinders/sssssmwh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-and-oblique-cylinders/sssssmwh"/>
      <lastmod>2026-11-02T18:13:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-sphere-demo/sssssmwt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-sphere-demo/sssssmwt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-sphere-demo/sssssmwt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-sphere-demo/sssssmwt"/>
      <lastmod>2026-11-02T00:14:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-sphere-demo/sssssmwt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-sphere-demo/sssssmwt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-sphere-demo/sssssmwt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-sphere-demo/sssssmwt"/>
      <lastmod>2026-11-02T00:14:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-18-construction/sssssmwx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-18-construction/sssssmwx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-18-construction/sssssmwx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-18-construction/sssssmwx"/>
      <lastmod>2026-11-02T18:01:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-18-construction/sssssmwx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-18-construction/sssssmwx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-18-construction/sssssmwx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-18-construction/sssssmwx"/>
      <lastmod>2026-11-02T18:01:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-function-graphs/sssssmwi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-function-graphs/sssssmwi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-function-graphs/sssssmwi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-function-graphs/sssssmwi"/>
      <lastmod>2026-11-01T21:11:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-function-graphs/sssssmwi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-function-graphs/sssssmwi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-function-graphs/sssssmwi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-function-graphs/sssssmwi"/>
      <lastmod>2026-11-01T21:11:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/random-polynomial-inequality-exploration/sssssmwo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-polynomial-inequality-exploration/sssssmwo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-polynomial-inequality-exploration/sssssmwo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-polynomial-inequality-exploration/sssssmwo"/>
      <lastmod>2026-11-01T21:53:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/random-polynomial-inequality-exploration/sssssmwo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-polynomial-inequality-exploration/sssssmwo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-polynomial-inequality-exploration/sssssmwo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-polynomial-inequality-exploration/sssssmwo"/>
      <lastmod>2026-11-01T21:53:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-and-mathematical-concepts-demo/sssssm6s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-and-mathematical-concepts-demo/sssssm6s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-and-mathematical-concepts-demo/sssssm6s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-and-mathematical-concepts-demo/sssssm6s"/>
      <lastmod>2026-11-02T18:08:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-and-mathematical-concepts-demo/sssssm6s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-and-mathematical-concepts-demo/sssssm6s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-and-mathematical-concepts-demo/sssssm6s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-and-mathematical-concepts-demo/sssssm6s"/>
      <lastmod>2026-11-02T18:08:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/critical-points-of-function-f-x-y-local-max-min-saddle/sssssm67</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/critical-points-of-function-f-x-y-local-max-min-saddle/sssssm67"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/critical-points-of-function-f-x-y-local-max-min-saddle/sssssm67"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/critical-points-of-function-f-x-y-local-max-min-saddle/sssssm67"/>
      <lastmod>2026-11-01T23:28:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/critical-points-of-function-f-x-y-local-max-min-saddle/sssssm67</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/critical-points-of-function-f-x-y-local-max-min-saddle/sssssm67"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/critical-points-of-function-f-x-y-local-max-min-saddle/sssssm67"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/critical-points-of-function-f-x-y-local-max-min-saddle/sssssm67"/>
      <lastmod>2026-11-01T23:28:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-triangles-on-the-unit-circle/sssssm6n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangles-on-the-unit-circle/sssssm6n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangles-on-the-unit-circle/sssssm6n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangles-on-the-unit-circle/sssssm6n"/>
      <lastmod>2026-11-02T02:44:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-triangles-on-the-unit-circle/sssssm6n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangles-on-the-unit-circle/sssssm6n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangles-on-the-unit-circle/sssssm6n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangles-on-the-unit-circle/sssssm6n"/>
      <lastmod>2026-11-02T02:44:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-with-known-cross-section/sssssm62</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-with-known-cross-section/sssssm62"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-with-known-cross-section/sssssm62"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-with-known-cross-section/sssssm62"/>
      <lastmod>2026-11-02T16:32:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-with-known-cross-section/sssssm62</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-with-known-cross-section/sssssm62"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-with-known-cross-section/sssssm62"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-with-known-cross-section/sssssm62"/>
      <lastmod>2026-11-02T16:32:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/feuerbach-circle-nine-point-circle/sssssm6k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/feuerbach-circle-nine-point-circle/sssssm6k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/feuerbach-circle-nine-point-circle/sssssm6k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/feuerbach-circle-nine-point-circle/sssssm6k"/>
      <lastmod>2026-11-02T02:27:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/feuerbach-circle-nine-point-circle/sssssm6k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/feuerbach-circle-nine-point-circle/sssssm6k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/feuerbach-circle-nine-point-circle/sssssm6k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/feuerbach-circle-nine-point-circle/sssssm6k"/>
      <lastmod>2026-11-02T02:27:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/create-sectors/sssssm6z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-sectors/sssssm6z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-sectors/sssssm6z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-sectors/sssssm6z"/>
      <lastmod>2026-11-01T21:21:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/create-sectors/sssssm6z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-sectors/sssssm6z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-sectors/sssssm6z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-sectors/sssssm6z"/>
      <lastmod>2026-11-01T21:21:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/factorization-of-standard-quadratic-expression-using-multiplication-frame-with/sssssm60</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factorization-of-standard-quadratic-expression-using-multiplication-frame-with/sssssm60"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factorization-of-standard-quadratic-expression-using-multiplication-frame-with/sssssm60"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factorization-of-standard-quadratic-expression-using-multiplication-frame-with/sssssm60"/>
      <lastmod>2026-11-01T20:43:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/factorization-of-standard-quadratic-expression-using-multiplication-frame-with/sssssm60</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factorization-of-standard-quadratic-expression-using-multiplication-frame-with/sssssm60"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factorization-of-standard-quadratic-expression-using-multiplication-frame-with/sssssm60"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factorization-of-standard-quadratic-expression-using-multiplication-frame-with/sssssm60"/>
      <lastmod>2026-11-01T20:43:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/student-translation-example/sssssm6d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/student-translation-example/sssssm6d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/student-translation-example/sssssm6d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/student-translation-example/sssssm6d"/>
      <lastmod>2026-11-02T17:57:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/student-translation-example/sssssm6d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/student-translation-example/sssssm6d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/student-translation-example/sssssm6d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/student-translation-example/sssssm6d"/>
      <lastmod>2026-11-02T17:57:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/five-rolling-triangles/sssssm6f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/five-rolling-triangles/sssssm6f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/five-rolling-triangles/sssssm6f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/five-rolling-triangles/sssssm6f"/>
      <lastmod>2026-11-02T00:41:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/five-rolling-triangles/sssssm6f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/five-rolling-triangles/sssssm6f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/five-rolling-triangles/sssssm6f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/five-rolling-triangles/sssssm6f"/>
      <lastmod>2026-11-02T00:41:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/horse-race-handicapped/sssssm68</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horse-race-handicapped/sssssm68"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horse-race-handicapped/sssssm68"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horse-race-handicapped/sssssm68"/>
      <lastmod>2026-11-02T02:17:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/horse-race-handicapped/sssssm68</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horse-race-handicapped/sssssm68"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horse-race-handicapped/sssssm68"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horse-race-handicapped/sssssm68"/>
      <lastmod>2026-11-02T02:17:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-combinations-demo/sssssm6u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-combinations-demo/sssssm6u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-combinations-demo/sssssm6u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-combinations-demo/sssssm6u"/>
      <lastmod>2026-11-01T21:22:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-combinations-demo/sssssm6u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-combinations-demo/sssssm6u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-combinations-demo/sssssm6u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-combinations-demo/sssssm6u"/>
      <lastmod>2026-11-01T21:22:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/judging-similar-polygons/sssssm65</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/judging-similar-polygons/sssssm65"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/judging-similar-polygons/sssssm65"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/judging-similar-polygons/sssssm65"/>
      <lastmod>2026-11-02T16:49:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/judging-similar-polygons/sssssm65</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/judging-similar-polygons/sssssm65"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/judging-similar-polygons/sssssm65"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/judging-similar-polygons/sssssm65"/>
      <lastmod>2026-11-02T16:49:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-n-gonal-numbers-peacock-theorem/sssssm6b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-n-gonal-numbers-peacock-theorem/sssssm6b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-n-gonal-numbers-peacock-theorem/sssssm6b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-n-gonal-numbers-peacock-theorem/sssssm6b"/>
      <lastmod>2026-11-01T19:08:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-n-gonal-numbers-peacock-theorem/sssssm6b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-n-gonal-numbers-peacock-theorem/sssssm6b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-n-gonal-numbers-peacock-theorem/sssssm6b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-n-gonal-numbers-peacock-theorem/sssssm6b"/>
      <lastmod>2026-11-01T19:08:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cosine-derivative-with-chain-rule/sssssm63</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-derivative-with-chain-rule/sssssm63"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-derivative-with-chain-rule/sssssm63"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-derivative-with-chain-rule/sssssm63"/>
      <lastmod>2026-11-01T21:11:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cosine-derivative-with-chain-rule/sssssm63</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-derivative-with-chain-rule/sssssm63"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-derivative-with-chain-rule/sssssm63"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-derivative-with-chain-rule/sssssm63"/>
      <lastmod>2026-11-01T21:11:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthoptic-of-fermat4/sssssm6q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthoptic-of-fermat4/sssssm6q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthoptic-of-fermat4/sssssm6q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthoptic-of-fermat4/sssssm6q"/>
      <lastmod>2026-11-01T21:27:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthoptic-of-fermat4/sssssm6q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthoptic-of-fermat4/sssssm6q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthoptic-of-fermat4/sssssm6q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthoptic-of-fermat4/sssssm6q"/>
      <lastmod>2026-11-01T21:27:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-sine-and-cosine-using-the-unit-circle-by-emma/sssssm61</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-sine-and-cosine-using-the-unit-circle-by-emma/sssssm61"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-sine-and-cosine-using-the-unit-circle-by-emma/sssssm61"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-sine-and-cosine-using-the-unit-circle-by-emma/sssssm61"/>
      <lastmod>2026-11-02T00:32:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-sine-and-cosine-using-the-unit-circle-by-emma/sssssm61</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-sine-and-cosine-using-the-unit-circle-by-emma/sssssm61"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-sine-and-cosine-using-the-unit-circle-by-emma/sssssm61"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-sine-and-cosine-using-the-unit-circle-by-emma/sssssm61"/>
      <lastmod>2026-11-02T00:32:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definition-of-parabola-by-ged1182/sssssm6m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-of-parabola-by-ged1182/sssssm6m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-of-parabola-by-ged1182/sssssm6m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-of-parabola-by-ged1182/sssssm6m"/>
      <lastmod>2026-11-01T21:56:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definition-of-parabola-by-ged1182/sssssm6m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-of-parabola-by-ged1182/sssssm6m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-of-parabola-by-ged1182/sssssm6m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-of-parabola-by-ged1182/sssssm6m"/>
      <lastmod>2026-11-01T21:56:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/identifying-solids-from-nets/sssssm6j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identifying-solids-from-nets/sssssm6j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identifying-solids-from-nets/sssssm6j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identifying-solids-from-nets/sssssm6j"/>
      <lastmod>2026-11-02T12:20:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/identifying-solids-from-nets/sssssm6j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identifying-solids-from-nets/sssssm6j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identifying-solids-from-nets/sssssm6j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identifying-solids-from-nets/sssssm6j"/>
      <lastmod>2026-11-02T12:20:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-and-tree-diagram/sssssm6p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-and-tree-diagram/sssssm6p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-and-tree-diagram/sssssm6p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-and-tree-diagram/sssssm6p"/>
      <lastmod>2026-11-02T02:53:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-and-tree-diagram/sssssm6p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-and-tree-diagram/sssssm6p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-and-tree-diagram/sssssm6p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-and-tree-diagram/sssssm6p"/>
      <lastmod>2026-11-02T02:53:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/student-translation-7/sssssm6w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/student-translation-7/sssssm6w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/student-translation-7/sssssm6w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/student-translation-7/sssssm6w"/>
      <lastmod>2026-11-02T18:03:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/student-translation-7/sssssm6w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/student-translation-7/sssssm6w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/student-translation-7/sssssm6w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/student-translation-7/sssssm6w"/>
      <lastmod>2026-11-02T18:03:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotational-symmetry-of-cube/sssssm66</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-cube/sssssm66"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-of-cube/sssssm66"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-cube/sssssm66"/>
      <lastmod>2026-11-02T16:48:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotational-symmetry-of-cube/sssssm66</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-cube/sssssm66"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-of-cube/sssssm66"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-cube/sssssm66"/>
      <lastmod>2026-11-02T16:48:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-place-value/sssssm6g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-place-value/sssssm6g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-place-value/sssssm6g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-place-value/sssssm6g"/>
      <lastmod>2026-11-02T17:55:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-place-value/sssssm6g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-place-value/sssssm6g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-place-value/sssssm6g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-place-value/sssssm6g"/>
      <lastmod>2026-11-02T17:55:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-line-to-a-parametric-curve/sssssm69</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-line-to-a-parametric-curve/sssssm69"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-line-to-a-parametric-curve/sssssm69"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-line-to-a-parametric-curve/sssssm69"/>
      <lastmod>2026-11-02T18:53:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-line-to-a-parametric-curve/sssssm69</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-line-to-a-parametric-curve/sssssm69"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-line-to-a-parametric-curve/sssssm69"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-line-to-a-parametric-curve/sssssm69"/>
      <lastmod>2026-11-02T18:53:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interest-calculation-and-geometric-transformations/sssssm6e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interest-calculation-and-geometric-transformations/sssssm6e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interest-calculation-and-geometric-transformations/sssssm6e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interest-calculation-and-geometric-transformations/sssssm6e"/>
      <lastmod>2026-11-02T02:31:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interest-calculation-and-geometric-transformations/sssssm6e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interest-calculation-and-geometric-transformations/sssssm6e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interest-calculation-and-geometric-transformations/sssssm6e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interest-calculation-and-geometric-transformations/sssssm6e"/>
      <lastmod>2026-11-02T02:31:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/christmas-tree-geometry-equilateral-triangles-and-circles/sssssm6v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/christmas-tree-geometry-equilateral-triangles-and-circles/sssssm6v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/christmas-tree-geometry-equilateral-triangles-and-circles/sssssm6v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/christmas-tree-geometry-equilateral-triangles-and-circles/sssssm6v"/>
      <lastmod>2026-11-02T13:34:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/christmas-tree-geometry-equilateral-triangles-and-circles/sssssm6v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/christmas-tree-geometry-equilateral-triangles-and-circles/sssssm6v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/christmas-tree-geometry-equilateral-triangles-and-circles/sssssm6v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/christmas-tree-geometry-equilateral-triangles-and-circles/sssssm6v"/>
      <lastmod>2026-11-02T13:34:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-transformation-investigation/sssssm64</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-transformation-investigation/sssssm64"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-transformation-investigation/sssssm64"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-transformation-investigation/sssssm64"/>
      <lastmod>2026-11-01T23:23:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-transformation-investigation/sssssm64</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-transformation-investigation/sssssm64"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-transformation-investigation/sssssm64"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-transformation-investigation/sssssm64"/>
      <lastmod>2026-11-01T23:23:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotational-symmetry-of-a-square/sssssm6l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-a-square/sssssm6l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-of-a-square/sssssm6l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-a-square/sssssm6l"/>
      <lastmod>2026-11-02T08:40:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotational-symmetry-of-a-square/sssssm6l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-a-square/sssssm6l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-of-a-square/sssssm6l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-a-square/sssssm6l"/>
      <lastmod>2026-11-02T08:40:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-orthocenter-by-emily-gracie/sssssm6y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-orthocenter-by-emily-gracie/sssssm6y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-triangle-s-orthocenter-by-emily-gracie/sssssm6y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-orthocenter-by-emily-gracie/sssssm6y"/>
      <lastmod>2026-11-01T22:11:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-triangle-s-orthocenter-by-emily-gracie/sssssm6y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-orthocenter-by-emily-gracie/sssssm6y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-triangle-s-orthocenter-by-emily-gracie/sssssm6y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-orthocenter-by-emily-gracie/sssssm6y"/>
      <lastmod>2026-11-01T22:11:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-vertex-form-exploring-parameter-transformations/sssssm6a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-vertex-form-exploring-parameter-transformations/sssssm6a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-vertex-form-exploring-parameter-transformations/sssssm6a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-vertex-form-exploring-parameter-transformations/sssssm6a"/>
      <lastmod>2026-11-01T21:49:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-vertex-form-exploring-parameter-transformations/sssssm6a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-vertex-form-exploring-parameter-transformations/sssssm6a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-vertex-form-exploring-parameter-transformations/sssssm6a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-vertex-form-exploring-parameter-transformations/sssssm6a"/>
      <lastmod>2026-11-01T21:49:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vectors-and-ellipse-with-logarithmic-transformations/sssssm6c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-and-ellipse-with-logarithmic-transformations/sssssm6c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-and-ellipse-with-logarithmic-transformations/sssssm6c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-and-ellipse-with-logarithmic-transformations/sssssm6c"/>
      <lastmod>2026-11-01T21:17:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vectors-and-ellipse-with-logarithmic-transformations/sssssm6c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-and-ellipse-with-logarithmic-transformations/sssssm6c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-and-ellipse-with-logarithmic-transformations/sssssm6c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-and-ellipse-with-logarithmic-transformations/sssssm6c"/>
      <lastmod>2026-11-01T21:17:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-s-geometric-properties-and-construction/sssssm6r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-s-geometric-properties-and-construction/sssssm6r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-s-geometric-properties-and-construction/sssssm6r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-s-geometric-properties-and-construction/sssssm6r"/>
      <lastmod>2026-11-02T00:12:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-s-geometric-properties-and-construction/sssssm6r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-s-geometric-properties-and-construction/sssssm6r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-s-geometric-properties-and-construction/sssssm6r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-s-geometric-properties-and-construction/sssssm6r"/>
      <lastmod>2026-11-02T00:12:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-segment-area-quick-investigation/sssssm6h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-segment-area-quick-investigation/sssssm6h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-segment-area-quick-investigation/sssssm6h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-segment-area-quick-investigation/sssssm6h"/>
      <lastmod>2026-11-02T16:39:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-segment-area-quick-investigation/sssssm6h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-segment-area-quick-investigation/sssssm6h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-segment-area-quick-investigation/sssssm6h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-segment-area-quick-investigation/sssssm6h"/>
      <lastmod>2026-11-02T16:39:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/random-variables-and-geometric-construction/sssssm6t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-variables-and-geometric-construction/sssssm6t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-variables-and-geometric-construction/sssssm6t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-variables-and-geometric-construction/sssssm6t"/>
      <lastmod>2026-11-02T18:12:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/random-variables-and-geometric-construction/sssssm6t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-variables-and-geometric-construction/sssssm6t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-variables-and-geometric-construction/sssssm6t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-variables-and-geometric-construction/sssssm6t"/>
      <lastmod>2026-11-02T18:12:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-addition-of-two-complex-numbers/sssssm6x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-addition-of-two-complex-numbers/sssssm6x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-addition-of-two-complex-numbers/sssssm6x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-addition-of-two-complex-numbers/sssssm6x"/>
      <lastmod>2026-11-02T15:38:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-addition-of-two-complex-numbers/sssssm6x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-addition-of-two-complex-numbers/sssssm6x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-addition-of-two-complex-numbers/sssssm6x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-addition-of-two-complex-numbers/sssssm6x"/>
      <lastmod>2026-11-02T15:38:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parametric-equations-demo-by-kristen-beck/sssssm6i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-equations-demo-by-kristen-beck/sssssm6i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-equations-demo-by-kristen-beck/sssssm6i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-equations-demo-by-kristen-beck/sssssm6i"/>
      <lastmod>2026-11-02T18:04:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parametric-equations-demo-by-kristen-beck/sssssm6i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-equations-demo-by-kristen-beck/sssssm6i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-equations-demo-by-kristen-beck/sssssm6i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-equations-demo-by-kristen-beck/sssssm6i"/>
      <lastmod>2026-11-02T18:04:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-wave-interference-demo/sssssm6o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-wave-interference-demo/sssssm6o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-wave-interference-demo/sssssm6o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-wave-interference-demo/sssssm6o"/>
      <lastmod>2026-11-02T17:10:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-wave-interference-demo/sssssm6o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-wave-interference-demo/sssssm6o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-wave-interference-demo/sssssm6o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-wave-interference-demo/sssssm6o"/>
      <lastmod>2026-11-02T17:10:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-quadratic-functions-intercept-form-17/sssssmgs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-intercept-form-17/sssssmgs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-functions-intercept-form-17/sssssmgs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-intercept-form-17/sssssmgs"/>
      <lastmod>2026-11-02T14:57:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-quadratic-functions-intercept-form-17/sssssmgs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-intercept-form-17/sssssmgs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-functions-intercept-form-17/sssssmgs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-intercept-form-17/sssssmgs"/>
      <lastmod>2026-11-02T14:57:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/4dframe-dome-edges-version/sssssmg7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/4dframe-dome-edges-version/sssssmg7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/4dframe-dome-edges-version/sssssmg7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/4dframe-dome-edges-version/sssssmg7"/>
      <lastmod>2026-11-02T15:52:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/4dframe-dome-edges-version/sssssmg7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/4dframe-dome-edges-version/sssssmg7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/4dframe-dome-edges-version/sssssmg7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/4dframe-dome-edges-version/sssssmg7"/>
      <lastmod>2026-11-02T15:52:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cis-psmpdi-scalar-multiple-property-proof/sssssmgn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cis-psmpdi-scalar-multiple-property-proof/sssssmgn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cis-psmpdi-scalar-multiple-property-proof/sssssmgn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cis-psmpdi-scalar-multiple-property-proof/sssssmgn"/>
      <lastmod>2026-11-02T03:10:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cis-psmpdi-scalar-multiple-property-proof/sssssmgn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cis-psmpdi-scalar-multiple-property-proof/sssssmgn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cis-psmpdi-scalar-multiple-property-proof/sssssmgn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cis-psmpdi-scalar-multiple-property-proof/sssssmgn"/>
      <lastmod>2026-11-02T03:10:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-text-example/sssssmg2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-text-example/sssssmg2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-text-example/sssssmg2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-text-example/sssssmg2"/>
      <lastmod>2026-11-02T18:50:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-text-example/sssssmg2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-text-example/sssssmg2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-text-example/sssssmg2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-text-example/sssssmg2"/>
      <lastmod>2026-11-02T18:50:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-and-rectangle-area-relationship/sssssmgk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-and-rectangle-area-relationship/sssssmgk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-and-rectangle-area-relationship/sssssmgk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-and-rectangle-area-relationship/sssssmgk"/>
      <lastmod>2026-11-02T10:56:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-and-rectangle-area-relationship/sssssmgk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-and-rectangle-area-relationship/sssssmgk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-and-rectangle-area-relationship/sssssmgk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-and-rectangle-area-relationship/sssssmgk"/>
      <lastmod>2026-11-02T10:56:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/octagon-dimensions/sssssmgz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/octagon-dimensions/sssssmgz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/octagon-dimensions/sssssmgz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/octagon-dimensions/sssssmgz"/>
      <lastmod>2026-11-02T03:16:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/octagon-dimensions/sssssmgz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/octagon-dimensions/sssssmgz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/octagon-dimensions/sssssmgz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/octagon-dimensions/sssssmgz"/>
      <lastmod>2026-11-02T03:16:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/playing-joker-math-game/sssssmg0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/playing-joker-math-game/sssssmg0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/playing-joker-math-game/sssssmg0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/playing-joker-math-game/sssssmg0"/>
      <lastmod>2026-11-02T17:47:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/playing-joker-math-game/sssssmg0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/playing-joker-math-game/sssssmg0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/playing-joker-math-game/sssssmg0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/playing-joker-math-game/sssssmg0"/>
      <lastmod>2026-11-02T17:47:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equation-of-tangent-line-roots/sssssmgd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equation-of-tangent-line-roots/sssssmgd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equation-of-tangent-line-roots/sssssmgd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equation-of-tangent-line-roots/sssssmgd"/>
      <lastmod>2026-11-02T15:43:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equation-of-tangent-line-roots/sssssmgd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equation-of-tangent-line-roots/sssssmgd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equation-of-tangent-line-roots/sssssmgd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equation-of-tangent-line-roots/sssssmgd"/>
      <lastmod>2026-11-02T15:43:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/howe-truss/sssssmgf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/howe-truss/sssssmgf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/howe-truss/sssssmgf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/howe-truss/sssssmgf"/>
      <lastmod>2026-11-02T18:58:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/howe-truss/sssssmgf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/howe-truss/sssssmgf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/howe-truss/sssssmgf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/howe-truss/sssssmgf"/>
      <lastmod>2026-11-02T18:58:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lotka-volterra-system-model/sssssmg8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lotka-volterra-system-model/sssssmg8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lotka-volterra-system-model/sssssmg8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lotka-volterra-system-model/sssssmg8"/>
      <lastmod>2026-11-02T18:29:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lotka-volterra-system-model/sssssmg8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lotka-volterra-system-model/sssssmg8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lotka-volterra-system-model/sssssmg8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lotka-volterra-system-model/sssssmg8"/>
      <lastmod>2026-11-02T18:29:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/non-square-rhombus-by-benbush/sssssmgu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/non-square-rhombus-by-benbush/sssssmgu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/non-square-rhombus-by-benbush/sssssmgu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/non-square-rhombus-by-benbush/sssssmgu"/>
      <lastmod>2026-11-02T17:57:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/non-square-rhombus-by-benbush/sssssmgu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/non-square-rhombus-by-benbush/sssssmgu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/non-square-rhombus-by-benbush/sssssmgu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/non-square-rhombus-by-benbush/sssssmgu"/>
      <lastmod>2026-11-02T17:57:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a-variant-of-asymmetric-propeller-with-varying-equilateral-triangles/sssssmg5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-variant-of-asymmetric-propeller-with-varying-equilateral-triangles/sssssmg5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-variant-of-asymmetric-propeller-with-varying-equilateral-triangles/sssssmg5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-variant-of-asymmetric-propeller-with-varying-equilateral-triangles/sssssmg5"/>
      <lastmod>2026-11-02T18:21:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a-variant-of-asymmetric-propeller-with-varying-equilateral-triangles/sssssmg5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-variant-of-asymmetric-propeller-with-varying-equilateral-triangles/sssssmg5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-variant-of-asymmetric-propeller-with-varying-equilateral-triangles/sssssmg5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-variant-of-asymmetric-propeller-with-varying-equilateral-triangles/sssssmg5"/>
      <lastmod>2026-11-02T18:21:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hexagonal-tiling/sssssmgb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagonal-tiling/sssssmgb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagonal-tiling/sssssmgb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagonal-tiling/sssssmgb"/>
      <lastmod>2026-11-01T23:35:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hexagonal-tiling/sssssmgb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagonal-tiling/sssssmgb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagonal-tiling/sssssmgb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagonal-tiling/sssssmgb"/>
      <lastmod>2026-11-01T23:35:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-parameterization/sssssmg3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-parameterization/sssssmg3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-parameterization/sssssmg3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-parameterization/sssssmg3"/>
      <lastmod>2026-11-02T17:15:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-parameterization/sssssmg3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-parameterization/sssssmg3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-parameterization/sssssmg3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-parameterization/sssssmg3"/>
      <lastmod>2026-11-02T17:15:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-illustration-of-relationship-between-regular-pentagon-and-decagon/sssssmgq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-relationship-between-regular-pentagon-and-decagon/sssssmgq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-relationship-between-regular-pentagon-and-decagon/sssssmgq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-relationship-between-regular-pentagon-and-decagon/sssssmgq"/>
      <lastmod>2026-11-02T18:20:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-illustration-of-relationship-between-regular-pentagon-and-decagon/sssssmgq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-relationship-between-regular-pentagon-and-decagon/sssssmgq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-relationship-between-regular-pentagon-and-decagon/sssssmgq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-relationship-between-regular-pentagon-and-decagon/sssssmgq"/>
      <lastmod>2026-11-02T18:20:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/1-proportion-simulation/sssssmg1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/1-proportion-simulation/sssssmg1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/1-proportion-simulation/sssssmg1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/1-proportion-simulation/sssssmg1"/>
      <lastmod>2026-11-01T23:46:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/1-proportion-simulation/sssssmg1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/1-proportion-simulation/sssssmg1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/1-proportion-simulation/sssssmg1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/1-proportion-simulation/sssssmg1"/>
      <lastmod>2026-11-01T23:46:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-geometric-illustration-by-tim-brzezinski-4/sssssmgm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometric-illustration-by-tim-brzezinski-4/sssssmgm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometric-illustration-by-tim-brzezinski-4/sssssmgm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometric-illustration-by-tim-brzezinski-4/sssssmgm"/>
      <lastmod>2026-11-02T18:44:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-geometric-illustration-by-tim-brzezinski-4/sssssmgm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometric-illustration-by-tim-brzezinski-4/sssssmgm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometric-illustration-by-tim-brzezinski-4/sssssmgm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometric-illustration-by-tim-brzezinski-4/sssssmgm"/>
      <lastmod>2026-11-02T18:44:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/scatter-plot-example/sssssmgj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scatter-plot-example/sssssmgj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scatter-plot-example/sssssmgj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scatter-plot-example/sssssmgj"/>
      <lastmod>2026-11-02T13:34:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/scatter-plot-example/sssssmgj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scatter-plot-example/sssssmgj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scatter-plot-example/sssssmgj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scatter-plot-example/sssssmgj"/>
      <lastmod>2026-11-02T13:34:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-a-square-demo/sssssmgp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-square-demo/sssssmgp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-square-demo/sssssmgp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-square-demo/sssssmgp"/>
      <lastmod>2026-11-02T16:58:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-a-square-demo/sssssmgp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-square-demo/sssssmgp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-square-demo/sssssmgp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-square-demo/sssssmgp"/>
      <lastmod>2026-11-02T16:58:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-geometry-equilateral-triangles-and-pyramids/sssssmgw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-equilateral-triangles-and-pyramids/sssssmgw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-equilateral-triangles-and-pyramids/sssssmgw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-equilateral-triangles-and-pyramids/sssssmgw"/>
      <lastmod>2026-11-02T16:47:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-geometry-equilateral-triangles-and-pyramids/sssssmgw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-equilateral-triangles-and-pyramids/sssssmgw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-equilateral-triangles-and-pyramids/sssssmgw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-equilateral-triangles-and-pyramids/sssssmgw"/>
      <lastmod>2026-11-02T16:47:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-development-part-2/sssssmg6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-development-part-2/sssssmg6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-development-part-2/sssssmg6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-development-part-2/sssssmg6"/>
      <lastmod>2026-11-02T09:09:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-development-part-2/sssssmg6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-development-part-2/sssssmg6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-development-part-2/sssssmg6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-development-part-2/sssssmg6"/>
      <lastmod>2026-11-02T09:09:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-and-cylinder-by-revolution/sssssmgg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-and-cylinder-by-revolution/sssssmgg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-and-cylinder-by-revolution/sssssmgg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-and-cylinder-by-revolution/sssssmgg"/>
      <lastmod>2026-11-02T13:30:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-and-cylinder-by-revolution/sssssmgg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-and-cylinder-by-revolution/sssssmgg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-and-cylinder-by-revolution/sssssmgg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-and-cylinder-by-revolution/sssssmgg"/>
      <lastmod>2026-11-02T13:30:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-volume-calculation-demo-by-diah-vialita-dewi/sssssmg9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-demo-by-diah-vialita-dewi/sssssmg9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-volume-calculation-demo-by-diah-vialita-dewi/sssssmg9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-demo-by-diah-vialita-dewi/sssssmg9"/>
      <lastmod>2026-11-02T00:43:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-volume-calculation-demo-by-diah-vialita-dewi/sssssmg9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-demo-by-diah-vialita-dewi/sssssmg9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-volume-calculation-demo-by-diah-vialita-dewi/sssssmg9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-demo-by-diah-vialita-dewi/sssssmg9"/>
      <lastmod>2026-11-02T00:43:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/irregular-quadrilateral-perimeter-calculation/sssssmge</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/irregular-quadrilateral-perimeter-calculation/sssssmge"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/irregular-quadrilateral-perimeter-calculation/sssssmge"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/irregular-quadrilateral-perimeter-calculation/sssssmge"/>
      <lastmod>2026-11-02T09:34:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/irregular-quadrilateral-perimeter-calculation/sssssmge</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/irregular-quadrilateral-perimeter-calculation/sssssmge"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/irregular-quadrilateral-perimeter-calculation/sssssmge"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/irregular-quadrilateral-perimeter-calculation/sssssmge"/>
      <lastmod>2026-11-02T09:34:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/scale-drawings-and-maps/sssssmgv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scale-drawings-and-maps/sssssmgv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scale-drawings-and-maps/sssssmgv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scale-drawings-and-maps/sssssmgv"/>
      <lastmod>2026-11-01T23:05:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/scale-drawings-and-maps/sssssmgv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scale-drawings-and-maps/sssssmgv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scale-drawings-and-maps/sssssmgv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scale-drawings-and-maps/sssssmgv"/>
      <lastmod>2026-11-01T23:05:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exercise-4-optimization-problems/sssssmg4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-4-optimization-problems/sssssmg4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-4-optimization-problems/sssssmg4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-4-optimization-problems/sssssmg4"/>
      <lastmod>2026-11-02T18:52:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exercise-4-optimization-problems/sssssmg4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-4-optimization-problems/sssssmg4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-4-optimization-problems/sssssmg4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-4-optimization-problems/sssssmg4"/>
      <lastmod>2026-11-02T18:52:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-wave-beats/sssssmgl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-wave-beats/sssssmgl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-wave-beats/sssssmgl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-wave-beats/sssssmgl"/>
      <lastmod>2026-11-02T02:44:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-wave-beats/sssssmgl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-wave-beats/sssssmgl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-wave-beats/sssssmgl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-wave-beats/sssssmgl"/>
      <lastmod>2026-11-02T02:44:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-number-for-two-overlapped-ellipses/sssssmgy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-number-for-two-overlapped-ellipses/sssssmgy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-number-for-two-overlapped-ellipses/sssssmgy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-number-for-two-overlapped-ellipses/sssssmgy"/>
      <lastmod>2026-11-01T22:01:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-number-for-two-overlapped-ellipses/sssssmgy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-number-for-two-overlapped-ellipses/sssssmgy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-number-for-two-overlapped-ellipses/sssssmgy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-number-for-two-overlapped-ellipses/sssssmgy"/>
      <lastmod>2026-11-01T22:01:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/decimal-and-fraction-visualiser/sssssmga</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-and-fraction-visualiser/sssssmga"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-and-fraction-visualiser/sssssmga"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-and-fraction-visualiser/sssssmga"/>
      <lastmod>2026-11-01T20:53:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/decimal-and-fraction-visualiser/sssssmga</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-and-fraction-visualiser/sssssmga"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-and-fraction-visualiser/sssssmga"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-and-fraction-visualiser/sssssmga"/>
      <lastmod>2026-11-01T20:53:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sum-and-product-of-complex-numbers/sssssmgc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-and-product-of-complex-numbers/sssssmgc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-and-product-of-complex-numbers/sssssmgc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-and-product-of-complex-numbers/sssssmgc"/>
      <lastmod>2026-11-02T08:41:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sum-and-product-of-complex-numbers/sssssmgc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-and-product-of-complex-numbers/sssssmgc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-and-product-of-complex-numbers/sssssmgc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-and-product-of-complex-numbers/sssssmgc"/>
      <lastmod>2026-11-02T08:41:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/division-algorithm-demonstration/sssssmgr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/division-algorithm-demonstration/sssssmgr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/division-algorithm-demonstration/sssssmgr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/division-algorithm-demonstration/sssssmgr"/>
      <lastmod>2026-11-02T15:38:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/division-algorithm-demonstration/sssssmgr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/division-algorithm-demonstration/sssssmgr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/division-algorithm-demonstration/sssssmgr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/division-algorithm-demonstration/sssssmgr"/>
      <lastmod>2026-11-02T15:38:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equation-of-a-perpendicular-line-practice/sssssmgh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equation-of-a-perpendicular-line-practice/sssssmgh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equation-of-a-perpendicular-line-practice/sssssmgh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equation-of-a-perpendicular-line-practice/sssssmgh"/>
      <lastmod>2026-11-01T21:12:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equation-of-a-perpendicular-line-practice/sssssmgh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equation-of-a-perpendicular-line-practice/sssssmgh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equation-of-a-perpendicular-line-practice/sssssmgh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equation-of-a-perpendicular-line-practice/sssssmgh"/>
      <lastmod>2026-11-01T21:12:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/radius-and-chord-exploring-circle-segment-relationships/sssssmgt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/radius-and-chord-exploring-circle-segment-relationships/sssssmgt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/radius-and-chord-exploring-circle-segment-relationships/sssssmgt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/radius-and-chord-exploring-circle-segment-relationships/sssssmgt"/>
      <lastmod>2026-11-01T19:12:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/radius-and-chord-exploring-circle-segment-relationships/sssssmgt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/radius-and-chord-exploring-circle-segment-relationships/sssssmgt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/radius-and-chord-exploring-circle-segment-relationships/sssssmgt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/radius-and-chord-exploring-circle-segment-relationships/sssssmgt"/>
      <lastmod>2026-11-01T19:12:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-a-pyramid/sssssmgx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-pyramid/sssssmgx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-pyramid/sssssmgx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-pyramid/sssssmgx"/>
      <lastmod>2026-11-01T19:03:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-a-pyramid/sssssmgx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-pyramid/sssssmgx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-pyramid/sssssmgx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-pyramid/sssssmgx"/>
      <lastmod>2026-11-01T19:03:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-transformation-by-suzanne-gibbons/sssssmgi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-transformation-by-suzanne-gibbons/sssssmgi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-transformation-by-suzanne-gibbons/sssssmgi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-transformation-by-suzanne-gibbons/sssssmgi"/>
      <lastmod>2026-11-01T23:30:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-transformation-by-suzanne-gibbons/sssssmgi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-transformation-by-suzanne-gibbons/sssssmgi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-transformation-by-suzanne-gibbons/sssssmgi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-transformation-by-suzanne-gibbons/sssssmgi"/>
      <lastmod>2026-11-01T23:30:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadrilateral-prism-generate-and-unfold/sssssmgo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-prism-generate-and-unfold/sssssmgo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-prism-generate-and-unfold/sssssmgo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-prism-generate-and-unfold/sssssmgo"/>
      <lastmod>2026-11-02T17:45:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadrilateral-prism-generate-and-unfold/sssssmgo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-prism-generate-and-unfold/sssssmgo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-prism-generate-and-unfold/sssssmgo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-prism-generate-and-unfold/sssssmgo"/>
      <lastmod>2026-11-02T17:45:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rational-exponents-practice-random-generation-and-interactive-verification/sssssm9s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rational-exponents-practice-random-generation-and-interactive-verification/sssssm9s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rational-exponents-practice-random-generation-and-interactive-verification/sssssm9s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rational-exponents-practice-random-generation-and-interactive-verification/sssssm9s"/>
      <lastmod>2026-11-02T18:06:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rational-exponents-practice-random-generation-and-interactive-verification/sssssm9s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rational-exponents-practice-random-generation-and-interactive-verification/sssssm9s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rational-exponents-practice-random-generation-and-interactive-verification/sssssm9s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rational-exponents-practice-random-generation-and-interactive-verification/sssssm9s"/>
      <lastmod>2026-11-02T18:06:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/partial-products-multiplication-demo/sssssm97</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-products-multiplication-demo/sssssm97"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-products-multiplication-demo/sssssm97"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-products-multiplication-demo/sssssm97"/>
      <lastmod>2026-11-02T16:44:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/partial-products-multiplication-demo/sssssm97</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-products-multiplication-demo/sssssm97"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-products-multiplication-demo/sssssm97"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-products-multiplication-demo/sssssm97"/>
      <lastmod>2026-11-02T16:44:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mario-math-example/sssssm9n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mario-math-example/sssssm9n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mario-math-example/sssssm9n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mario-math-example/sssssm9n"/>
      <lastmod>2026-11-02T18:37:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mario-math-example/sssssm9n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mario-math-example/sssssm9n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mario-math-example/sssssm9n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mario-math-example/sssssm9n"/>
      <lastmod>2026-11-02T18:37:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/disk-washer-method-for-volumes/sssssm92</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/disk-washer-method-for-volumes/sssssm92"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/disk-washer-method-for-volumes/sssssm92"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/disk-washer-method-for-volumes/sssssm92"/>
      <lastmod>2026-11-01T23:13:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/disk-washer-method-for-volumes/sssssm92</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/disk-washer-method-for-volumes/sssssm92"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/disk-washer-method-for-volumes/sssssm92"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/disk-washer-method-for-volumes/sssssm92"/>
      <lastmod>2026-11-01T23:13:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cross-sections-of-rectangular-prisms-by-daniel-grubbs/sssssm9k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-sections-of-rectangular-prisms-by-daniel-grubbs/sssssm9k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-sections-of-rectangular-prisms-by-daniel-grubbs/sssssm9k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-sections-of-rectangular-prisms-by-daniel-grubbs/sssssm9k"/>
      <lastmod>2026-11-02T13:43:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cross-sections-of-rectangular-prisms-by-daniel-grubbs/sssssm9k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-sections-of-rectangular-prisms-by-daniel-grubbs/sssssm9k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-sections-of-rectangular-prisms-by-daniel-grubbs/sssssm9k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-sections-of-rectangular-prisms-by-daniel-grubbs/sssssm9k"/>
      <lastmod>2026-11-02T13:43:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plotting-coordinates-with-fraction-text-display/sssssm9z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-coordinates-with-fraction-text-display/sssssm9z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-coordinates-with-fraction-text-display/sssssm9z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-coordinates-with-fraction-text-display/sssssm9z"/>
      <lastmod>2026-11-02T18:55:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plotting-coordinates-with-fraction-text-display/sssssm9z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-coordinates-with-fraction-text-display/sssssm9z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-coordinates-with-fraction-text-display/sssssm9z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-coordinates-with-fraction-text-display/sssssm9z"/>
      <lastmod>2026-11-02T18:55:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractional-exponents-to-radicals/sssssm90</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractional-exponents-to-radicals/sssssm90"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractional-exponents-to-radicals/sssssm90"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractional-exponents-to-radicals/sssssm90"/>
      <lastmod>2026-11-01T22:02:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractional-exponents-to-radicals/sssssm90</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractional-exponents-to-radicals/sssssm90"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractional-exponents-to-radicals/sssssm90"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractional-exponents-to-radicals/sssssm90"/>
      <lastmod>2026-11-01T22:02:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-and-side-lengths-demo/sssssm9d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-and-side-lengths-demo/sssssm9d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-and-side-lengths-demo/sssssm9d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-and-side-lengths-demo/sssssm9d"/>
      <lastmod>2026-11-02T03:03:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-and-side-lengths-demo/sssssm9d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-and-side-lengths-demo/sssssm9d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-and-side-lengths-demo/sssssm9d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-and-side-lengths-demo/sssssm9d"/>
      <lastmod>2026-11-02T03:03:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polynomial-magic-trick-exploring-function-patterns-with-mod-and-input-boxes/sssssm9f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-magic-trick-exploring-function-patterns-with-mod-and-input-boxes/sssssm9f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-magic-trick-exploring-function-patterns-with-mod-and-input-boxes/sssssm9f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-magic-trick-exploring-function-patterns-with-mod-and-input-boxes/sssssm9f"/>
      <lastmod>2026-11-01T22:10:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polynomial-magic-trick-exploring-function-patterns-with-mod-and-input-boxes/sssssm9f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-magic-trick-exploring-function-patterns-with-mod-and-input-boxes/sssssm9f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-magic-trick-exploring-function-patterns-with-mod-and-input-boxes/sssssm9f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-magic-trick-exploring-function-patterns-with-mod-and-input-boxes/sssssm9f"/>
      <lastmod>2026-11-01T22:10:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-in-coordination-plane/sssssm98</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-in-coordination-plane/sssssm98"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-in-coordination-plane/sssssm98"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-in-coordination-plane/sssssm98"/>
      <lastmod>2026-11-02T10:43:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-in-coordination-plane/sssssm98</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-in-coordination-plane/sssssm98"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-in-coordination-plane/sssssm98"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-in-coordination-plane/sssssm98"/>
      <lastmod>2026-11-02T10:43:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-inequalities-by-william-morris/sssssm9u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-by-william-morris/sssssm9u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-inequalities-by-william-morris/sssssm9u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-by-william-morris/sssssm9u"/>
      <lastmod>2026-11-02T13:05:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-inequalities-by-william-morris/sssssm9u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-by-william-morris/sssssm9u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-inequalities-by-william-morris/sssssm9u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-by-william-morris/sssssm9u"/>
      <lastmod>2026-11-02T13:05:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/connectivity-matrix-by-chris-cambr-3/sssssm95</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connectivity-matrix-by-chris-cambr-3/sssssm95"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connectivity-matrix-by-chris-cambr-3/sssssm95"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connectivity-matrix-by-chris-cambr-3/sssssm95"/>
      <lastmod>2026-11-02T18:45:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/connectivity-matrix-by-chris-cambr-3/sssssm95</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connectivity-matrix-by-chris-cambr-3/sssssm95"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connectivity-matrix-by-chris-cambr-3/sssssm95"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connectivity-matrix-by-chris-cambr-3/sssssm95"/>
      <lastmod>2026-11-02T18:45:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interior-and-exterior-angles-of-regular-polygons/sssssm9b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interior-and-exterior-angles-of-regular-polygons/sssssm9b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interior-and-exterior-angles-of-regular-polygons/sssssm9b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interior-and-exterior-angles-of-regular-polygons/sssssm9b"/>
      <lastmod>2026-11-02T00:18:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interior-and-exterior-angles-of-regular-polygons/sssssm9b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interior-and-exterior-angles-of-regular-polygons/sssssm9b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interior-and-exterior-angles-of-regular-polygons/sssssm9b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interior-and-exterior-angles-of-regular-polygons/sssssm9b"/>
      <lastmod>2026-11-02T00:18:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/amazing-patterns/sssssm93</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/amazing-patterns/sssssm93"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/amazing-patterns/sssssm93"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/amazing-patterns/sssssm93"/>
      <lastmod>2026-11-01T20:58:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/amazing-patterns/sssssm93</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/amazing-patterns/sssssm93"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/amazing-patterns/sssssm93"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/amazing-patterns/sssssm93"/>
      <lastmod>2026-11-01T20:58:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/walker-g-orthocenter/sssssm9q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/walker-g-orthocenter/sssssm9q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/walker-g-orthocenter/sssssm9q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/walker-g-orthocenter/sssssm9q"/>
      <lastmod>2026-11-02T16:50:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/walker-g-orthocenter/sssssm9q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/walker-g-orthocenter/sssssm9q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/walker-g-orthocenter/sssssm9q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/walker-g-orthocenter/sssssm9q"/>
      <lastmod>2026-11-02T16:50:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solid-shapes/sssssm91</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solid-shapes/sssssm91"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solid-shapes/sssssm91"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solid-shapes/sssssm91"/>
      <lastmod>2026-11-02T00:01:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solid-shapes/sssssm91</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solid-shapes/sssssm91"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solid-shapes/sssssm91"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solid-shapes/sssssm91"/>
      <lastmod>2026-11-02T00:01:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/alternate-exterior-angles-interactive-parallel-line-investigation/sssssm9m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-exterior-angles-interactive-parallel-line-investigation/sssssm9m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-exterior-angles-interactive-parallel-line-investigation/sssssm9m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-exterior-angles-interactive-parallel-line-investigation/sssssm9m"/>
      <lastmod>2026-11-01T21:47:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/alternate-exterior-angles-interactive-parallel-line-investigation/sssssm9m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-exterior-angles-interactive-parallel-line-investigation/sssssm9m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-exterior-angles-interactive-parallel-line-investigation/sssssm9m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-exterior-angles-interactive-parallel-line-investigation/sssssm9m"/>
      <lastmod>2026-11-01T21:47:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/observation-of-skew-lines/sssssm9j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/observation-of-skew-lines/sssssm9j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/observation-of-skew-lines/sssssm9j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/observation-of-skew-lines/sssssm9j"/>
      <lastmod>2026-11-02T00:09:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/observation-of-skew-lines/sssssm9j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/observation-of-skew-lines/sssssm9j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/observation-of-skew-lines/sssssm9j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/observation-of-skew-lines/sssssm9j"/>
      <lastmod>2026-11-02T00:09:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/snell-s-law-demonstration/sssssm9p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/snell-s-law-demonstration/sssssm9p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/snell-s-law-demonstration/sssssm9p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/snell-s-law-demonstration/sssssm9p"/>
      <lastmod>2026-11-02T00:28:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/snell-s-law-demonstration/sssssm9p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/snell-s-law-demonstration/sssssm9p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/snell-s-law-demonstration/sssssm9p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/snell-s-law-demonstration/sssssm9p"/>
      <lastmod>2026-11-02T00:28:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-6/sssssm9w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-6/sssssm9w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-illustration-by-tim-brzezinski-6/sssssm9w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-6/sssssm9w"/>
      <lastmod>2026-11-02T17:39:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-geometry-illustration-by-tim-brzezinski-6/sssssm9w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-6/sssssm9w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-illustration-by-tim-brzezinski-6/sssssm9w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-6/sssssm9w"/>
      <lastmod>2026-11-02T17:39:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solve-the-system-of-equations-by-graphing/sssssm96</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solve-the-system-of-equations-by-graphing/sssssm96"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solve-the-system-of-equations-by-graphing/sssssm96"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solve-the-system-of-equations-by-graphing/sssssm96"/>
      <lastmod>2026-11-01T21:41:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solve-the-system-of-equations-by-graphing/sssssm96</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solve-the-system-of-equations-by-graphing/sssssm96"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solve-the-system-of-equations-by-graphing/sssssm96"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solve-the-system-of-equations-by-graphing/sssssm96"/>
      <lastmod>2026-11-01T21:41:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pentagon-rotation-puzzle-by-david-wees/sssssm9g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pentagon-rotation-puzzle-by-david-wees/sssssm9g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pentagon-rotation-puzzle-by-david-wees/sssssm9g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pentagon-rotation-puzzle-by-david-wees/sssssm9g"/>
      <lastmod>2026-11-02T02:37:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pentagon-rotation-puzzle-by-david-wees/sssssm9g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pentagon-rotation-puzzle-by-david-wees/sssssm9g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pentagon-rotation-puzzle-by-david-wees/sssssm9g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pentagon-rotation-puzzle-by-david-wees/sssssm9g"/>
      <lastmod>2026-11-02T02:37:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/90-degree-rotation-geogebra-example/sssssm99</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/90-degree-rotation-geogebra-example/sssssm99"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/90-degree-rotation-geogebra-example/sssssm99"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/90-degree-rotation-geogebra-example/sssssm99"/>
      <lastmod>2026-11-02T13:52:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/90-degree-rotation-geogebra-example/sssssm99</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/90-degree-rotation-geogebra-example/sssssm99"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/90-degree-rotation-geogebra-example/sssssm99"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/90-degree-rotation-geogebra-example/sssssm99"/>
      <lastmod>2026-11-02T13:52:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-revolution/sssssm9e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-revolution/sssssm9e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-revolution/sssssm9e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-revolution/sssssm9e"/>
      <lastmod>2026-11-02T02:49:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-revolution/sssssm9e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-revolution/sssssm9e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-revolution/sssssm9e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-revolution/sssssm9e"/>
      <lastmod>2026-11-02T02:49:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-opposite-sides-of-parallelograms/sssssm9v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-opposite-sides-of-parallelograms/sssssm9v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-opposite-sides-of-parallelograms/sssssm9v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-opposite-sides-of-parallelograms/sssssm9v"/>
      <lastmod>2026-11-02T16:43:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-opposite-sides-of-parallelograms/sssssm9v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-opposite-sides-of-parallelograms/sssssm9v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-opposite-sides-of-parallelograms/sssssm9v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-opposite-sides-of-parallelograms/sssssm9v"/>
      <lastmod>2026-11-02T16:43:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflecting-a-triangle/sssssm94</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflecting-a-triangle/sssssm94"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflecting-a-triangle/sssssm94"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflecting-a-triangle/sssssm94"/>
      <lastmod>2026-11-01T21:12:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflecting-a-triangle/sssssm94</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflecting-a-triangle/sssssm94"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflecting-a-triangle/sssssm94"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflecting-a-triangle/sssssm94"/>
      <lastmod>2026-11-01T21:12:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modifiable-torus-explorer/sssssm9l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modifiable-torus-explorer/sssssm9l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modifiable-torus-explorer/sssssm9l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modifiable-torus-explorer/sssssm9l"/>
      <lastmod>2026-11-02T18:25:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modifiable-torus-explorer/sssssm9l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modifiable-torus-explorer/sssssm9l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modifiable-torus-explorer/sssssm9l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modifiable-torus-explorer/sssssm9l"/>
      <lastmod>2026-11-02T18:25:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/baravelle-cube/sssssm9y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/baravelle-cube/sssssm9y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/baravelle-cube/sssssm9y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/baravelle-cube/sssssm9y"/>
      <lastmod>2026-11-02T02:54:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/baravelle-cube/sssssm9y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/baravelle-cube/sssssm9y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/baravelle-cube/sssssm9y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/baravelle-cube/sssssm9y"/>
      <lastmod>2026-11-02T02:54:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-center-form-demo/sssssm9a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-center-form-demo/sssssm9a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-center-form-demo/sssssm9a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-center-form-demo/sssssm9a"/>
      <lastmod>2026-11-02T11:58:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-center-form-demo/sssssm9a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-center-form-demo/sssssm9a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-center-form-demo/sssssm9a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-center-form-demo/sssssm9a"/>
      <lastmod>2026-11-02T11:58:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/roc-curve-demonstration/sssssm9c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roc-curve-demonstration/sssssm9c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roc-curve-demonstration/sssssm9c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roc-curve-demonstration/sssssm9c"/>
      <lastmod>2026-11-02T08:31:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/roc-curve-demonstration/sssssm9c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roc-curve-demonstration/sssssm9c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roc-curve-demonstration/sssssm9c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roc-curve-demonstration/sssssm9c"/>
      <lastmod>2026-11-02T08:31:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mei-rotation-matrix/sssssm9r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mei-rotation-matrix/sssssm9r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mei-rotation-matrix/sssssm9r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mei-rotation-matrix/sssssm9r"/>
      <lastmod>2026-11-02T00:02:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mei-rotation-matrix/sssssm9r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mei-rotation-matrix/sssssm9r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mei-rotation-matrix/sssssm9r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mei-rotation-matrix/sssssm9r"/>
      <lastmod>2026-11-02T00:02:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animation-257-comprehensive-dynamic-demo-of-geometry-and-matrix-transformations/sssssm9h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-257-comprehensive-dynamic-demo-of-geometry-and-matrix-transformations/sssssm9h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-257-comprehensive-dynamic-demo-of-geometry-and-matrix-transformations/sssssm9h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-257-comprehensive-dynamic-demo-of-geometry-and-matrix-transformations/sssssm9h"/>
      <lastmod>2026-11-02T18:56:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animation-257-comprehensive-dynamic-demo-of-geometry-and-matrix-transformations/sssssm9h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-257-comprehensive-dynamic-demo-of-geometry-and-matrix-transformations/sssssm9h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-257-comprehensive-dynamic-demo-of-geometry-and-matrix-transformations/sssssm9h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-257-comprehensive-dynamic-demo-of-geometry-and-matrix-transformations/sssssm9h"/>
      <lastmod>2026-11-02T18:56:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-by-harrytomalley-2/sssssm9t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-by-harrytomalley-2/sssssm9t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temperature-vs-time-multiplication-by-harrytomalley-2/sssssm9t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-by-harrytomalley-2/sssssm9t"/>
      <lastmod>2026-11-02T09:39:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/temperature-vs-time-multiplication-by-harrytomalley-2/sssssm9t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-by-harrytomalley-2/sssssm9t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temperature-vs-time-multiplication-by-harrytomalley-2/sssssm9t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-by-harrytomalley-2/sssssm9t"/>
      <lastmod>2026-11-02T09:39:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tables-and-graphs/sssssm9x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tables-and-graphs/sssssm9x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tables-and-graphs/sssssm9x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tables-and-graphs/sssssm9x"/>
      <lastmod>2026-11-02T16:33:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tables-and-graphs/sssssm9x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tables-and-graphs/sssssm9x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tables-and-graphs/sssssm9x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tables-and-graphs/sssssm9x"/>
      <lastmod>2026-11-02T16:33:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-dodecagon-demonstration/sssssm9i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-dodecagon-demonstration/sssssm9i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-dodecagon-demonstration/sssssm9i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-dodecagon-demonstration/sssssm9i"/>
      <lastmod>2026-11-02T00:46:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-dodecagon-demonstration/sssssm9i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-dodecagon-demonstration/sssssm9i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-dodecagon-demonstration/sssssm9i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-dodecagon-demonstration/sssssm9i"/>
      <lastmod>2026-11-02T00:46:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-proof-construction/sssssm9o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-proof-construction/sssssm9o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-proof-construction/sssssm9o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-proof-construction/sssssm9o"/>
      <lastmod>2026-11-02T12:49:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-proof-construction/sssssm9o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-proof-construction/sssssm9o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-proof-construction/sssssm9o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-proof-construction/sssssm9o"/>
      <lastmod>2026-11-02T12:49:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/line-reflection-by-gary-rubinstein/sssssmes</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-reflection-by-gary-rubinstein/sssssmes"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-reflection-by-gary-rubinstein/sssssmes"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-reflection-by-gary-rubinstein/sssssmes"/>
      <lastmod>2026-11-02T02:28:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/line-reflection-by-gary-rubinstein/sssssmes</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-reflection-by-gary-rubinstein/sssssmes"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-reflection-by-gary-rubinstein/sssssmes"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-reflection-by-gary-rubinstein/sssssmes"/>
      <lastmod>2026-11-02T02:28:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/central-symmetry-a-multi-concept-geometric-demonstration/sssssme7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/central-symmetry-a-multi-concept-geometric-demonstration/sssssme7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/central-symmetry-a-multi-concept-geometric-demonstration/sssssme7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/central-symmetry-a-multi-concept-geometric-demonstration/sssssme7"/>
      <lastmod>2026-11-01T19:05:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/central-symmetry-a-multi-concept-geometric-demonstration/sssssme7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/central-symmetry-a-multi-concept-geometric-demonstration/sssssme7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/central-symmetry-a-multi-concept-geometric-demonstration/sssssme7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/central-symmetry-a-multi-concept-geometric-demonstration/sssssme7"/>
      <lastmod>2026-11-01T19:05:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/aristarchus-mistake/sssssmen</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/aristarchus-mistake/sssssmen"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/aristarchus-mistake/sssssmen"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/aristarchus-mistake/sssssmen"/>
      <lastmod>2026-11-02T16:31:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/aristarchus-mistake/sssssmen</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/aristarchus-mistake/sssssmen"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/aristarchus-mistake/sssssmen"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/aristarchus-mistake/sssssmen"/>
      <lastmod>2026-11-02T16:31:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/piscis-austrinus-a-composite-polyhedral-and-geometric-transformation-figure/sssssme2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/piscis-austrinus-a-composite-polyhedral-and-geometric-transformation-figure/sssssme2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/piscis-austrinus-a-composite-polyhedral-and-geometric-transformation-figure/sssssme2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/piscis-austrinus-a-composite-polyhedral-and-geometric-transformation-figure/sssssme2"/>
      <lastmod>2026-11-01T19:22:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/piscis-austrinus-a-composite-polyhedral-and-geometric-transformation-figure/sssssme2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/piscis-austrinus-a-composite-polyhedral-and-geometric-transformation-figure/sssssme2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/piscis-austrinus-a-composite-polyhedral-and-geometric-transformation-figure/sssssme2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/piscis-austrinus-a-composite-polyhedral-and-geometric-transformation-figure/sssssme2"/>
      <lastmod>2026-11-01T19:22:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-functions-activity/sssssmek</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-functions-activity/sssssmek"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-functions-activity/sssssmek"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-functions-activity/sssssmek"/>
      <lastmod>2026-11-02T02:22:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-functions-activity/sssssmek</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-functions-activity/sssssmek"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-functions-activity/sssssmek"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-functions-activity/sssssmek"/>
      <lastmod>2026-11-02T02:22:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-bisector-by-dst1017/sssssmez</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-by-dst1017/sssssmez"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisector-by-dst1017/sssssmez"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-by-dst1017/sssssmez"/>
      <lastmod>2026-11-02T17:56:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-bisector-by-dst1017/sssssmez</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-by-dst1017/sssssmez"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisector-by-dst1017/sssssmez"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-by-dst1017/sssssmez"/>
      <lastmod>2026-11-02T17:56:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/another-form-of-pythagoras-theorem/sssssme0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/another-form-of-pythagoras-theorem/sssssme0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/another-form-of-pythagoras-theorem/sssssme0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/another-form-of-pythagoras-theorem/sssssme0"/>
      <lastmod>2026-11-01T23:31:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/another-form-of-pythagoras-theorem/sssssme0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/another-form-of-pythagoras-theorem/sssssme0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/another-form-of-pythagoras-theorem/sssssme0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/another-form-of-pythagoras-theorem/sssssme0"/>
      <lastmod>2026-11-01T23:31:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perimeters-and-areas-of-similar-polygons-by-l-sliver/sssssmed</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeters-and-areas-of-similar-polygons-by-l-sliver/sssssmed"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeters-and-areas-of-similar-polygons-by-l-sliver/sssssmed"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeters-and-areas-of-similar-polygons-by-l-sliver/sssssmed"/>
      <lastmod>2026-11-02T06:17:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perimeters-and-areas-of-similar-polygons-by-l-sliver/sssssmed</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeters-and-areas-of-similar-polygons-by-l-sliver/sssssmed"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeters-and-areas-of-similar-polygons-by-l-sliver/sssssmed"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeters-and-areas-of-similar-polygons-by-l-sliver/sssssmed"/>
      <lastmod>2026-11-02T06:17:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploration-of-function-domain-and-range/sssssmef</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploration-of-function-domain-and-range/sssssmef"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploration-of-function-domain-and-range/sssssmef"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploration-of-function-domain-and-range/sssssmef"/>
      <lastmod>2026-11-02T16:32:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploration-of-function-domain-and-range/sssssmef</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploration-of-function-domain-and-range/sssssmef"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploration-of-function-domain-and-range/sssssmef"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploration-of-function-domain-and-range/sssssmef"/>
      <lastmod>2026-11-02T16:32:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/testing-convergence-of-ratio-between-terms-of-a-recurrence-relation/sssssme8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/testing-convergence-of-ratio-between-terms-of-a-recurrence-relation/sssssme8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/testing-convergence-of-ratio-between-terms-of-a-recurrence-relation/sssssme8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/testing-convergence-of-ratio-between-terms-of-a-recurrence-relation/sssssme8"/>
      <lastmod>2026-11-02T18:29:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/testing-convergence-of-ratio-between-terms-of-a-recurrence-relation/sssssme8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/testing-convergence-of-ratio-between-terms-of-a-recurrence-relation/sssssme8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/testing-convergence-of-ratio-between-terms-of-a-recurrence-relation/sssssme8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/testing-convergence-of-ratio-between-terms-of-a-recurrence-relation/sssssme8"/>
      <lastmod>2026-11-02T18:29:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pedal-point-construction-of-a-parabola/sssssmeu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pedal-point-construction-of-a-parabola/sssssmeu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pedal-point-construction-of-a-parabola/sssssmeu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pedal-point-construction-of-a-parabola/sssssmeu"/>
      <lastmod>2026-11-02T18:34:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pedal-point-construction-of-a-parabola/sssssmeu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pedal-point-construction-of-a-parabola/sssssmeu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pedal-point-construction-of-a-parabola/sssssmeu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pedal-point-construction-of-a-parabola/sssssmeu"/>
      <lastmod>2026-11-02T18:34:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-construction-by-mr-lietzow/sssssme5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-construction-by-mr-lietzow/sssssme5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-construction-by-mr-lietzow/sssssme5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-construction-by-mr-lietzow/sssssme5"/>
      <lastmod>2026-11-02T18:40:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-construction-by-mr-lietzow/sssssme5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-construction-by-mr-lietzow/sssssme5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-construction-by-mr-lietzow/sssssme5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-construction-by-mr-lietzow/sssssme5"/>
      <lastmod>2026-11-02T18:40:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simple-multiplication/sssssmeb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-multiplication/sssssmeb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-multiplication/sssssmeb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-multiplication/sssssmeb"/>
      <lastmod>2026-11-01T20:44:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simple-multiplication/sssssmeb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-multiplication/sssssmeb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-multiplication/sssssmeb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-multiplication/sssssmeb"/>
      <lastmod>2026-11-01T20:44:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-sine-with-chain-rule/sssssme3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-sine-with-chain-rule/sssssme3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-sine-with-chain-rule/sssssme3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-sine-with-chain-rule/sssssme3"/>
      <lastmod>2026-11-01T21:17:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-of-sine-with-chain-rule/sssssme3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-sine-with-chain-rule/sssssme3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-sine-with-chain-rule/sssssme3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-sine-with-chain-rule/sssssme3"/>
      <lastmod>2026-11-01T21:17:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-dynamic-demo/sssssmeq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-dynamic-demo/sssssmeq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-dynamic-demo/sssssmeq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-dynamic-demo/sssssmeq"/>
      <lastmod>2026-11-02T18:54:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-dynamic-demo/sssssmeq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-dynamic-demo/sssssmeq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-dynamic-demo/sssssmeq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-dynamic-demo/sssssmeq"/>
      <lastmod>2026-11-02T18:54:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-functions-part-3-vertex-form-transformations-and-geometric-integratio/sssssme1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-functions-part-3-vertex-form-transformations-and-geometric-integratio/sssssme1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-functions-part-3-vertex-form-transformations-and-geometric-integratio/sssssme1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-functions-part-3-vertex-form-transformations-and-geometric-integratio/sssssme1"/>
      <lastmod>2026-11-02T18:08:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-functions-part-3-vertex-form-transformations-and-geometric-integratio/sssssme1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-functions-part-3-vertex-form-transformations-and-geometric-integratio/sssssme1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-functions-part-3-vertex-form-transformations-and-geometric-integratio/sssssme1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-functions-part-3-vertex-form-transformations-and-geometric-integratio/sssssme1"/>
      <lastmod>2026-11-02T18:08:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-subtraction-and-parallelogram-demo/sssssmem</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-subtraction-and-parallelogram-demo/sssssmem"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-subtraction-and-parallelogram-demo/sssssmem"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-subtraction-and-parallelogram-demo/sssssmem"/>
      <lastmod>2026-11-02T15:17:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-subtraction-and-parallelogram-demo/sssssmem</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-subtraction-and-parallelogram-demo/sssssmem"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-subtraction-and-parallelogram-demo/sssssmem"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-subtraction-and-parallelogram-demo/sssssmem"/>
      <lastmod>2026-11-02T15:17:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-patterns-isis-project-construction-puzzles/sssssmej</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-patterns-isis-project-construction-puzzles/sssssmej"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-patterns-isis-project-construction-puzzles/sssssmej"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-patterns-isis-project-construction-puzzles/sssssmej"/>
      <lastmod>2026-11-01T21:24:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-patterns-isis-project-construction-puzzles/sssssmej</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-patterns-isis-project-construction-puzzles/sssssmej"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-patterns-isis-project-construction-puzzles/sssssmej"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-patterns-isis-project-construction-puzzles/sssssmej"/>
      <lastmod>2026-11-01T21:24:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploration-of-arc-length-and-sector-area/sssssmep</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploration-of-arc-length-and-sector-area/sssssmep"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploration-of-arc-length-and-sector-area/sssssmep"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploration-of-arc-length-and-sector-area/sssssmep"/>
      <lastmod>2026-11-01T22:09:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploration-of-arc-length-and-sector-area/sssssmep</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploration-of-arc-length-and-sector-area/sssssmep"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploration-of-arc-length-and-sector-area/sssssmep"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploration-of-arc-length-and-sector-area/sssssmep"/>
      <lastmod>2026-11-01T22:09:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-scientific-notation-numbers/sssssmew</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-scientific-notation-numbers/sssssmew"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-scientific-notation-numbers/sssssmew"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-scientific-notation-numbers/sssssmew"/>
      <lastmod>2026-11-02T18:02:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-scientific-notation-numbers/sssssmew</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-scientific-notation-numbers/sssssmew"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-scientific-notation-numbers/sssssmew"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-scientific-notation-numbers/sssssmew"/>
      <lastmod>2026-11-02T18:02:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dissection-of-cube-into-six-bie-nao-right-triangular-pyramids/sssssme6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dissection-of-cube-into-six-bie-nao-right-triangular-pyramids/sssssme6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dissection-of-cube-into-six-bie-nao-right-triangular-pyramids/sssssme6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dissection-of-cube-into-six-bie-nao-right-triangular-pyramids/sssssme6"/>
      <lastmod>2026-11-02T13:13:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dissection-of-cube-into-six-bie-nao-right-triangular-pyramids/sssssme6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dissection-of-cube-into-six-bie-nao-right-triangular-pyramids/sssssme6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dissection-of-cube-into-six-bie-nao-right-triangular-pyramids/sssssme6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dissection-of-cube-into-six-bie-nao-right-triangular-pyramids/sssssme6"/>
      <lastmod>2026-11-02T13:13:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coplanar-concurrent-forces/sssssmeg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coplanar-concurrent-forces/sssssmeg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coplanar-concurrent-forces/sssssmeg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coplanar-concurrent-forces/sssssmeg"/>
      <lastmod>2026-11-01T20:52:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coplanar-concurrent-forces/sssssmeg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coplanar-concurrent-forces/sssssmeg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coplanar-concurrent-forces/sssssmeg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coplanar-concurrent-forces/sssssmeg"/>
      <lastmod>2026-11-01T20:52:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/incenter-exploration/sssssme9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/incenter-exploration/sssssme9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/incenter-exploration/sssssme9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/incenter-exploration/sssssme9"/>
      <lastmod>2026-11-01T23:22:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/incenter-exploration/sssssme9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/incenter-exploration/sssssme9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/incenter-exploration/sssssme9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/incenter-exploration/sssssme9"/>
      <lastmod>2026-11-01T23:22:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/special-parallelograms-demo/sssssmee</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-parallelograms-demo/sssssmee"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-parallelograms-demo/sssssmee"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-parallelograms-demo/sssssmee"/>
      <lastmod>2026-11-02T17:11:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/special-parallelograms-demo/sssssmee</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-parallelograms-demo/sssssmee"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-parallelograms-demo/sssssmee"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-parallelograms-demo/sssssmee"/>
      <lastmod>2026-11-02T17:11:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/point-to-line-distance-and-foot-of-perpendicular/sssssmev</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-to-line-distance-and-foot-of-perpendicular/sssssmev"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-to-line-distance-and-foot-of-perpendicular/sssssmev"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-to-line-distance-and-foot-of-perpendicular/sssssmev"/>
      <lastmod>2026-11-01T21:07:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/point-to-line-distance-and-foot-of-perpendicular/sssssmev</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-to-line-distance-and-foot-of-perpendicular/sssssmev"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-to-line-distance-and-foot-of-perpendicular/sssssmev"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-to-line-distance-and-foot-of-perpendicular/sssssmev"/>
      <lastmod>2026-11-01T21:07:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplication-table-quiz-16-19/sssssme4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-table-quiz-16-19/sssssme4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-table-quiz-16-19/sssssme4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-table-quiz-16-19/sssssme4"/>
      <lastmod>2026-11-02T18:00:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplication-table-quiz-16-19/sssssme4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-table-quiz-16-19/sssssme4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-table-quiz-16-19/sssssme4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-table-quiz-16-19/sssssme4"/>
      <lastmod>2026-11-02T18:00:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-the-region-between-two-function-graphs/sssssmel</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-the-region-between-two-function-graphs/sssssmel"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-the-region-between-two-function-graphs/sssssmel"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-the-region-between-two-function-graphs/sssssmel"/>
      <lastmod>2026-11-01T19:35:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-the-region-between-two-function-graphs/sssssmel</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-the-region-between-two-function-graphs/sssssmel"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-the-region-between-two-function-graphs/sssssmel"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-the-region-between-two-function-graphs/sssssmel"/>
      <lastmod>2026-11-01T19:35:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-numbers/sssssmey</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-numbers/sssssmey"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-numbers/sssssmey"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-numbers/sssssmey"/>
      <lastmod>2026-11-02T17:00:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-numbers/sssssmey</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-numbers/sssssmey"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-numbers/sssssmey"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-numbers/sssssmey"/>
      <lastmod>2026-11-02T17:00:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fun-with-fractions-and-decimal-fractions-target-locating/sssssmea</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fun-with-fractions-and-decimal-fractions-target-locating/sssssmea"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fun-with-fractions-and-decimal-fractions-target-locating/sssssmea"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fun-with-fractions-and-decimal-fractions-target-locating/sssssmea"/>
      <lastmod>2026-11-02T13:28:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fun-with-fractions-and-decimal-fractions-target-locating/sssssmea</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fun-with-fractions-and-decimal-fractions-target-locating/sssssmea"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fun-with-fractions-and-decimal-fractions-target-locating/sssssmea"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fun-with-fractions-and-decimal-fractions-target-locating/sssssmea"/>
      <lastmod>2026-11-02T13:28:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parkland-puzzle-3-geometric-application-of-logic-and-calculus/sssssmec</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parkland-puzzle-3-geometric-application-of-logic-and-calculus/sssssmec"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parkland-puzzle-3-geometric-application-of-logic-and-calculus/sssssmec"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parkland-puzzle-3-geometric-application-of-logic-and-calculus/sssssmec"/>
      <lastmod>2026-11-01T21:54:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parkland-puzzle-3-geometric-application-of-logic-and-calculus/sssssmec</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parkland-puzzle-3-geometric-application-of-logic-and-calculus/sssssmec"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parkland-puzzle-3-geometric-application-of-logic-and-calculus/sssssmec"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parkland-puzzle-3-geometric-application-of-logic-and-calculus/sssssmec"/>
      <lastmod>2026-11-01T21:54:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animation-278-polygons-and-transformations/sssssmer</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-278-polygons-and-transformations/sssssmer"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-278-polygons-and-transformations/sssssmer"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-278-polygons-and-transformations/sssssmer"/>
      <lastmod>2026-11-02T17:08:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animation-278-polygons-and-transformations/sssssmer</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-278-polygons-and-transformations/sssssmer"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-278-polygons-and-transformations/sssssmer"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-278-polygons-and-transformations/sssssmer"/>
      <lastmod>2026-11-02T17:08:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-net/sssssmeh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-net/sssssmeh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-net/sssssmeh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-net/sssssmeh"/>
      <lastmod>2026-11-02T17:11:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-net/sssssmeh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-net/sssssmeh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-net/sssssmeh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-net/sssssmeh"/>
      <lastmod>2026-11-02T17:11:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-examples-and-non-examples/sssssmet</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-examples-and-non-examples/sssssmet"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-examples-and-non-examples/sssssmet"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-examples-and-non-examples/sssssmet"/>
      <lastmod>2026-11-01T23:28:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-examples-and-non-examples/sssssmet</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-examples-and-non-examples/sssssmet"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-examples-and-non-examples/sssssmet"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-examples-and-non-examples/sssssmet"/>
      <lastmod>2026-11-01T23:28:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/momentum-vector-sum-demo-by-kevin-lenton/sssssmex</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/momentum-vector-sum-demo-by-kevin-lenton/sssssmex"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/momentum-vector-sum-demo-by-kevin-lenton/sssssmex"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/momentum-vector-sum-demo-by-kevin-lenton/sssssmex"/>
      <lastmod>2026-11-02T09:37:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/momentum-vector-sum-demo-by-kevin-lenton/sssssmex</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/momentum-vector-sum-demo-by-kevin-lenton/sssssmex"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/momentum-vector-sum-demo-by-kevin-lenton/sssssmex"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/momentum-vector-sum-demo-by-kevin-lenton/sssssmex"/>
      <lastmod>2026-11-02T09:37:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vectors-and-planes/sssssmei</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-and-planes/sssssmei"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-and-planes/sssssmei"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-and-planes/sssssmei"/>
      <lastmod>2026-11-02T12:31:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vectors-and-planes/sssssmei</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-and-planes/sssssmei"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-and-planes/sssssmei"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-and-planes/sssssmei"/>
      <lastmod>2026-11-02T12:31:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-construction-by-d-riley/sssssmeo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-construction-by-d-riley/sssssmeo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-construction-by-d-riley/sssssmeo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-construction-by-d-riley/sssssmeo"/>
      <lastmod>2026-11-02T18:20:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-construction-by-d-riley/sssssmeo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-construction-by-d-riley/sssssmeo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-construction-by-d-riley/sssssmeo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-construction-by-d-riley/sssssmeo"/>
      <lastmod>2026-11-02T18:20:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/phantom-graph-devil-s-curve/sssssmvs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-devil-s-curve/sssssmvs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-devil-s-curve/sssssmvs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-devil-s-curve/sssssmvs"/>
      <lastmod>2026-11-02T09:41:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/phantom-graph-devil-s-curve/sssssmvs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-devil-s-curve/sssssmvs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-devil-s-curve/sssssmvs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-devil-s-curve/sssssmvs"/>
      <lastmod>2026-11-02T09:41:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logo-carrefour-b-zier-curve/sssssmv7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logo-carrefour-b-zier-curve/sssssmv7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logo-carrefour-b-zier-curve/sssssmv7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logo-carrefour-b-zier-curve/sssssmv7"/>
      <lastmod>2026-11-01T21:58:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logo-carrefour-b-zier-curve/sssssmv7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logo-carrefour-b-zier-curve/sssssmv7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logo-carrefour-b-zier-curve/sssssmv7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logo-carrefour-b-zier-curve/sssssmv7"/>
      <lastmod>2026-11-01T21:58:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-cone-3d-geometric-construction/sssssmvn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cone-3d-geometric-construction/sssssmvn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cone-3d-geometric-construction/sssssmvn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cone-3d-geometric-construction/sssssmvn"/>
      <lastmod>2026-11-02T12:33:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-cone-3d-geometric-construction/sssssmvn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cone-3d-geometric-construction/sssssmvn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cone-3d-geometric-construction/sssssmvn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cone-3d-geometric-construction/sssssmvn"/>
      <lastmod>2026-11-02T12:33:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/writing-coordinates/sssssmv2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/writing-coordinates/sssssmv2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/writing-coordinates/sssssmv2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/writing-coordinates/sssssmv2"/>
      <lastmod>2026-11-02T18:04:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/writing-coordinates/sssssmv2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/writing-coordinates/sssssmv2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/writing-coordinates/sssssmv2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/writing-coordinates/sssssmv2"/>
      <lastmod>2026-11-02T18:04:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animation-161-triangle-median-transformation/sssssmvk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-161-triangle-median-transformation/sssssmvk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-161-triangle-median-transformation/sssssmvk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-161-triangle-median-transformation/sssssmvk"/>
      <lastmod>2026-11-02T12:45:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animation-161-triangle-median-transformation/sssssmvk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-161-triangle-median-transformation/sssssmvk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-161-triangle-median-transformation/sssssmvk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-161-triangle-median-transformation/sssssmvk"/>
      <lastmod>2026-11-02T12:45:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slope-investigation-parabola/sssssmvz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-investigation-parabola/sssssmvz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-investigation-parabola/sssssmvz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-investigation-parabola/sssssmvz"/>
      <lastmod>2026-11-02T18:31:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slope-investigation-parabola/sssssmvz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-investigation-parabola/sssssmvz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-investigation-parabola/sssssmvz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-investigation-parabola/sssssmvz"/>
      <lastmod>2026-11-02T18:31:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-interpretation-of-determinant/sssssmv0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-interpretation-of-determinant/sssssmv0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-interpretation-of-determinant/sssssmv0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-interpretation-of-determinant/sssssmv0"/>
      <lastmod>2026-11-01T19:29:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-interpretation-of-determinant/sssssmv0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-interpretation-of-determinant/sssssmv0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-interpretation-of-determinant/sssssmv0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-interpretation-of-determinant/sssssmv0"/>
      <lastmod>2026-11-01T19:29:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/long-division-practice-by-callum-marshall/sssssmvd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/long-division-practice-by-callum-marshall/sssssmvd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/long-division-practice-by-callum-marshall/sssssmvd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/long-division-practice-by-callum-marshall/sssssmvd"/>
      <lastmod>2026-11-02T00:30:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/long-division-practice-by-callum-marshall/sssssmvd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/long-division-practice-by-callum-marshall/sssssmvd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/long-division-practice-by-callum-marshall/sssssmvd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/long-division-practice-by-callum-marshall/sssssmvd"/>
      <lastmod>2026-11-02T00:30:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-pyramid-geometry-demo/sssssmvf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-pyramid-geometry-demo/sssssmvf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-pyramid-geometry-demo/sssssmvf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-pyramid-geometry-demo/sssssmvf"/>
      <lastmod>2026-11-01T21:32:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-pyramid-geometry-demo/sssssmvf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-pyramid-geometry-demo/sssssmvf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-pyramid-geometry-demo/sssssmvf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-pyramid-geometry-demo/sssssmvf"/>
      <lastmod>2026-11-01T21:32:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/converse-of-pythagoras-theorem/sssssmv8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/converse-of-pythagoras-theorem/sssssmv8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/converse-of-pythagoras-theorem/sssssmv8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/converse-of-pythagoras-theorem/sssssmv8"/>
      <lastmod>2026-11-02T02:14:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/converse-of-pythagoras-theorem/sssssmv8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/converse-of-pythagoras-theorem/sssssmv8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/converse-of-pythagoras-theorem/sssssmv8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/converse-of-pythagoras-theorem/sssssmv8"/>
      <lastmod>2026-11-02T02:14:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/elliptic-views/sssssmvu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/elliptic-views/sssssmvu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/elliptic-views/sssssmvu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/elliptic-views/sssssmvu"/>
      <lastmod>2026-11-01T19:21:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/elliptic-views/sssssmvu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/elliptic-views/sssssmvu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/elliptic-views/sssssmvu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/elliptic-views/sssssmvu"/>
      <lastmod>2026-11-01T19:21:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-comma-first-attack/sssssmv5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-comma-first-attack/sssssmv5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-comma-first-attack/sssssmv5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-comma-first-attack/sssssmv5"/>
      <lastmod>2026-11-02T02:37:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-comma-first-attack/sssssmv5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-comma-first-attack/sssssmv5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-comma-first-attack/sssssmv5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-comma-first-attack/sssssmv5"/>
      <lastmod>2026-11-02T02:37:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-net-by-blakemasson/sssssmvb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-net-by-blakemasson/sssssmvb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-net-by-blakemasson/sssssmvb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-net-by-blakemasson/sssssmvb"/>
      <lastmod>2026-11-02T17:11:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-net-by-blakemasson/sssssmvb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-net-by-blakemasson/sssssmvb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-net-by-blakemasson/sssssmvb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-net-by-blakemasson/sssssmvb"/>
      <lastmod>2026-11-02T17:11:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-by-cemccourseware/sssssmv3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-by-cemccourseware/sssssmv3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-by-cemccourseware/sssssmv3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-by-cemccourseware/sssssmv3"/>
      <lastmod>2026-11-02T00:30:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-by-cemccourseware/sssssmv3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-by-cemccourseware/sssssmv3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-by-cemccourseware/sssssmv3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-by-cemccourseware/sssssmv3"/>
      <lastmod>2026-11-02T00:30:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-and-congruence/sssssmvq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-and-congruence/sssssmvq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-and-congruence/sssssmvq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-and-congruence/sssssmvq"/>
      <lastmod>2026-11-02T17:53:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-and-congruence/sssssmvq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-and-congruence/sssssmvq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-and-congruence/sssssmvq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-and-congruence/sssssmvq"/>
      <lastmod>2026-11-02T17:53:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/saddle-point/sssssmv1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/saddle-point/sssssmv1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/saddle-point/sssssmv1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/saddle-point/sssssmv1"/>
      <lastmod>2026-11-02T09:27:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/saddle-point/sssssmv1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/saddle-point/sssssmv1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/saddle-point/sssssmv1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/saddle-point/sssssmv1"/>
      <lastmod>2026-11-02T09:27:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-multiplication-and-complex-numbers-exercise/sssssmvm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-multiplication-and-complex-numbers-exercise/sssssmvm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-multiplication-and-complex-numbers-exercise/sssssmvm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-multiplication-and-complex-numbers-exercise/sssssmvm"/>
      <lastmod>2026-11-02T18:49:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-multiplication-and-complex-numbers-exercise/sssssmvm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-multiplication-and-complex-numbers-exercise/sssssmvm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-multiplication-and-complex-numbers-exercise/sssssmvm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-multiplication-and-complex-numbers-exercise/sssssmvm"/>
      <lastmod>2026-11-02T18:49:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-maker/sssssmvj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-maker/sssssmvj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-maker/sssssmvj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-maker/sssssmvj"/>
      <lastmod>2026-11-02T18:22:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-maker/sssssmvj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-maker/sssssmvj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-maker/sssssmvj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-maker/sssssmvj"/>
      <lastmod>2026-11-02T18:22:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-volumes-by-known-cross-section/sssssmvp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-volumes-by-known-cross-section/sssssmvp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-volumes-by-known-cross-section/sssssmvp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-volumes-by-known-cross-section/sssssmvp"/>
      <lastmod>2026-11-02T09:35:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-volumes-by-known-cross-section/sssssmvp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-volumes-by-known-cross-section/sssssmvp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-volumes-by-known-cross-section/sssssmvp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-volumes-by-known-cross-section/sssssmvp"/>
      <lastmod>2026-11-02T09:35:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-roots-and-triangular-numbers-3d-geometric-visualization/sssssmvw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-roots-and-triangular-numbers-3d-geometric-visualization/sssssmvw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-roots-and-triangular-numbers-3d-geometric-visualization/sssssmvw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-roots-and-triangular-numbers-3d-geometric-visualization/sssssmvw"/>
      <lastmod>2026-11-02T00:21:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-roots-and-triangular-numbers-3d-geometric-visualization/sssssmvw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-roots-and-triangular-numbers-3d-geometric-visualization/sssssmvw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-roots-and-triangular-numbers-3d-geometric-visualization/sssssmvw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-roots-and-triangular-numbers-3d-geometric-visualization/sssssmvw"/>
      <lastmod>2026-11-02T00:21:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/find-the-lcm/sssssmv6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-the-lcm/sssssmv6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-the-lcm/sssssmv6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-the-lcm/sssssmv6"/>
      <lastmod>2026-11-02T16:44:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/find-the-lcm/sssssmv6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-the-lcm/sssssmv6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-the-lcm/sssssmv6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-the-lcm/sssssmv6"/>
      <lastmod>2026-11-02T16:44:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/points-of-intersection-starter/sssssmvg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/points-of-intersection-starter/sssssmvg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/points-of-intersection-starter/sssssmvg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/points-of-intersection-starter/sssssmvg"/>
      <lastmod>2026-11-02T16:29:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/points-of-intersection-starter/sssssmvg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/points-of-intersection-starter/sssssmvg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/points-of-intersection-starter/sssssmvg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/points-of-intersection-starter/sssssmvg"/>
      <lastmod>2026-11-02T16:29:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/factorization-using-special-algebraic-identities/sssssmv9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factorization-using-special-algebraic-identities/sssssmv9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factorization-using-special-algebraic-identities/sssssmv9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factorization-using-special-algebraic-identities/sssssmv9"/>
      <lastmod>2026-11-02T17:17:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/factorization-using-special-algebraic-identities/sssssmv9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factorization-using-special-algebraic-identities/sssssmv9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factorization-using-special-algebraic-identities/sssssmv9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factorization-using-special-algebraic-identities/sssssmv9"/>
      <lastmod>2026-11-02T17:17:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-the-derivative/sssssmve</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-the-derivative/sssssmve"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-the-derivative/sssssmve"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-the-derivative/sssssmve"/>
      <lastmod>2026-11-02T03:14:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-the-derivative/sssssmve</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-the-derivative/sssssmve"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-the-derivative/sssssmve"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-the-derivative/sssssmve"/>
      <lastmod>2026-11-02T03:14:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabolas-art-tudor-v-9d/sssssmvv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolas-art-tudor-v-9d/sssssmvv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolas-art-tudor-v-9d/sssssmvv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolas-art-tudor-v-9d/sssssmvv"/>
      <lastmod>2026-11-01T23:21:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabolas-art-tudor-v-9d/sssssmvv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolas-art-tudor-v-9d/sssssmvv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolas-art-tudor-v-9d/sssssmvv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolas-art-tudor-v-9d/sssssmvv"/>
      <lastmod>2026-11-01T23:21:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/balls-in-a-box/sssssmv4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/balls-in-a-box/sssssmv4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/balls-in-a-box/sssssmv4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/balls-in-a-box/sssssmv4"/>
      <lastmod>2026-11-01T23:27:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/balls-in-a-box/sssssmv4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/balls-in-a-box/sssssmv4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/balls-in-a-box/sssssmv4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/balls-in-a-box/sssssmv4"/>
      <lastmod>2026-11-01T23:27:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-d-jayaseelan/sssssmvl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-d-jayaseelan/sssssmvl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-demonstration-by-d-jayaseelan/sssssmvl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-d-jayaseelan/sssssmvl"/>
      <lastmod>2026-11-02T17:50:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-demonstration-by-d-jayaseelan/sssssmvl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-d-jayaseelan/sssssmvl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-demonstration-by-d-jayaseelan/sssssmvl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-d-jayaseelan/sssssmvl"/>
      <lastmod>2026-11-02T17:50:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tape-diagrams-for-fractions/sssssmvy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tape-diagrams-for-fractions/sssssmvy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tape-diagrams-for-fractions/sssssmvy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tape-diagrams-for-fractions/sssssmvy"/>
      <lastmod>2026-11-02T15:44:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tape-diagrams-for-fractions/sssssmvy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tape-diagrams-for-fractions/sssssmvy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tape-diagrams-for-fractions/sssssmvy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tape-diagrams-for-fractions/sssssmvy"/>
      <lastmod>2026-11-02T15:44:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lagrange-error-bound-visualizing-taylor-polynomial-approximation/sssssmva</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lagrange-error-bound-visualizing-taylor-polynomial-approximation/sssssmva"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lagrange-error-bound-visualizing-taylor-polynomial-approximation/sssssmva"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lagrange-error-bound-visualizing-taylor-polynomial-approximation/sssssmva"/>
      <lastmod>2026-11-02T18:28:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lagrange-error-bound-visualizing-taylor-polynomial-approximation/sssssmva</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lagrange-error-bound-visualizing-taylor-polynomial-approximation/sssssmva"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lagrange-error-bound-visualizing-taylor-polynomial-approximation/sssssmva"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lagrange-error-bound-visualizing-taylor-polynomial-approximation/sssssmva"/>
      <lastmod>2026-11-02T18:28:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/formation-of-a-sine-wave-from-the-unit-circle/sssssmvc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/formation-of-a-sine-wave-from-the-unit-circle/sssssmvc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/formation-of-a-sine-wave-from-the-unit-circle/sssssmvc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/formation-of-a-sine-wave-from-the-unit-circle/sssssmvc"/>
      <lastmod>2026-11-02T17:46:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/formation-of-a-sine-wave-from-the-unit-circle/sssssmvc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/formation-of-a-sine-wave-from-the-unit-circle/sssssmvc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/formation-of-a-sine-wave-from-the-unit-circle/sssssmvc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/formation-of-a-sine-wave-from-the-unit-circle/sssssmvc"/>
      <lastmod>2026-11-02T17:46:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cavalieri-s-principle-volume-of-a-sphere/sssssmvr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cavalieri-s-principle-volume-of-a-sphere/sssssmvr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cavalieri-s-principle-volume-of-a-sphere/sssssmvr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cavalieri-s-principle-volume-of-a-sphere/sssssmvr"/>
      <lastmod>2026-11-02T16:34:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cavalieri-s-principle-volume-of-a-sphere/sssssmvr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cavalieri-s-principle-volume-of-a-sphere/sssssmvr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cavalieri-s-principle-volume-of-a-sphere/sssssmvr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cavalieri-s-principle-volume-of-a-sphere/sssssmvr"/>
      <lastmod>2026-11-02T16:34:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dimensions-of-a-circle/sssssmvh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dimensions-of-a-circle/sssssmvh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dimensions-of-a-circle/sssssmvh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dimensions-of-a-circle/sssssmvh"/>
      <lastmod>2026-11-01T22:05:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dimensions-of-a-circle/sssssmvh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dimensions-of-a-circle/sssssmvh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dimensions-of-a-circle/sssssmvh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dimensions-of-a-circle/sssssmvh"/>
      <lastmod>2026-11-01T22:05:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-a-cube-using-a-net/sssssmvt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cube-using-a-net/sssssmvt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-cube-using-a-net/sssssmvt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cube-using-a-net/sssssmvt"/>
      <lastmod>2026-11-02T10:50:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-a-cube-using-a-net/sssssmvt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cube-using-a-net/sssssmvt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-cube-using-a-net/sssssmvt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cube-using-a-net/sssssmvt"/>
      <lastmod>2026-11-02T10:50:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definite-integral-change-one-parameter/sssssmvx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-change-one-parameter/sssssmvx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-change-one-parameter/sssssmvx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-change-one-parameter/sssssmvx"/>
      <lastmod>2026-11-02T17:38:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definite-integral-change-one-parameter/sssssmvx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-change-one-parameter/sssssmvx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-change-one-parameter/sssssmvx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-change-one-parameter/sssssmvx"/>
      <lastmod>2026-11-02T17:38:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/organic-columns-dynamic-geometric-prism-structure/sssssmvi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/organic-columns-dynamic-geometric-prism-structure/sssssmvi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/organic-columns-dynamic-geometric-prism-structure/sssssmvi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/organic-columns-dynamic-geometric-prism-structure/sssssmvi"/>
      <lastmod>2026-11-02T00:10:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/organic-columns-dynamic-geometric-prism-structure/sssssmvi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/organic-columns-dynamic-geometric-prism-structure/sssssmvi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/organic-columns-dynamic-geometric-prism-structure/sssssmvi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/organic-columns-dynamic-geometric-prism-structure/sssssmvi"/>
      <lastmod>2026-11-02T00:10:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/planes-perpendicular-to-axes/sssssmvo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planes-perpendicular-to-axes/sssssmvo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes-perpendicular-to-axes/sssssmvo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes-perpendicular-to-axes/sssssmvo"/>
      <lastmod>2026-11-02T00:54:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/planes-perpendicular-to-axes/sssssmvo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planes-perpendicular-to-axes/sssssmvo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes-perpendicular-to-axes/sssssmvo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes-perpendicular-to-axes/sssssmvo"/>
      <lastmod>2026-11-02T00:54:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/toolbox/sssssm4s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/toolbox/sssssm4s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/toolbox/sssssm4s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/toolbox/sssssm4s"/>
      <lastmod>2026-11-02T18:52:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/toolbox/sssssm4s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/toolbox/sssssm4s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/toolbox/sssssm4s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/toolbox/sssssm4s"/>
      <lastmod>2026-11-02T18:52:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/non-linear-simultaneous-equations-demo/sssssm47</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/non-linear-simultaneous-equations-demo/sssssm47"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/non-linear-simultaneous-equations-demo/sssssm47"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/non-linear-simultaneous-equations-demo/sssssm47"/>
      <lastmod>2026-11-02T17:11:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/non-linear-simultaneous-equations-demo/sssssm47</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/non-linear-simultaneous-equations-demo/sssssm47"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/non-linear-simultaneous-equations-demo/sssssm47"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/non-linear-simultaneous-equations-demo/sssssm47"/>
      <lastmod>2026-11-02T17:11:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-and-locus-demonstration/sssssm4n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-locus-demonstration/sssssm4n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-locus-demonstration/sssssm4n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-locus-demonstration/sssssm4n"/>
      <lastmod>2026-11-02T08:43:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-and-locus-demonstration/sssssm4n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-locus-demonstration/sssssm4n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-locus-demonstration/sssssm4n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-locus-demonstration/sssssm4n"/>
      <lastmod>2026-11-02T08:43:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-linear-inequalities/sssssm42</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-inequalities/sssssm42"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-inequalities/sssssm42"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-inequalities/sssssm42"/>
      <lastmod>2026-11-01T21:34:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-linear-inequalities/sssssm42</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-inequalities/sssssm42"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-inequalities/sssssm42"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-inequalities/sssssm42"/>
      <lastmod>2026-11-01T21:34:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vectors-from-a-point-to-a-line/sssssm4k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-from-a-point-to-a-line/sssssm4k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-from-a-point-to-a-line/sssssm4k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-from-a-point-to-a-line/sssssm4k"/>
      <lastmod>2026-11-02T16:42:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vectors-from-a-point-to-a-line/sssssm4k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-from-a-point-to-a-line/sssssm4k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-from-a-point-to-a-line/sssssm4k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-from-a-point-to-a-line/sssssm4k"/>
      <lastmod>2026-11-02T16:42:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exterior-angle-bisector-theorem-and-its-proof/sssssm4z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angle-bisector-theorem-and-its-proof/sssssm4z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angle-bisector-theorem-and-its-proof/sssssm4z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angle-bisector-theorem-and-its-proof/sssssm4z"/>
      <lastmod>2026-11-01T19:24:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exterior-angle-bisector-theorem-and-its-proof/sssssm4z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angle-bisector-theorem-and-its-proof/sssssm4z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angle-bisector-theorem-and-its-proof/sssssm4z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angle-bisector-theorem-and-its-proof/sssssm4z"/>
      <lastmod>2026-11-01T19:24:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/investigation-of-isosceles-right-triangle/sssssm40</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigation-of-isosceles-right-triangle/sssssm40"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigation-of-isosceles-right-triangle/sssssm40"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigation-of-isosceles-right-triangle/sssssm40"/>
      <lastmod>2026-11-01T23:39:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/investigation-of-isosceles-right-triangle/sssssm40</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigation-of-isosceles-right-triangle/sssssm40"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigation-of-isosceles-right-triangle/sssssm40"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigation-of-isosceles-right-triangle/sssssm40"/>
      <lastmod>2026-11-01T23:39:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/data-set-visualization/sssssm4d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/data-set-visualization/sssssm4d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/data-set-visualization/sssssm4d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/data-set-visualization/sssssm4d"/>
      <lastmod>2026-11-02T02:28:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/data-set-visualization/sssssm4d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/data-set-visualization/sssssm4d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/data-set-visualization/sssssm4d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/data-set-visualization/sssssm4d"/>
      <lastmod>2026-11-02T02:28:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-equations-application-problem-generator-5/sssssm4f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-application-problem-generator-5/sssssm4f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-application-problem-generator-5/sssssm4f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-application-problem-generator-5/sssssm4f"/>
      <lastmod>2026-11-02T16:31:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-equations-application-problem-generator-5/sssssm4f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-application-problem-generator-5/sssssm4f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-application-problem-generator-5/sssssm4f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-application-problem-generator-5/sssssm4f"/>
      <lastmod>2026-11-02T16:31:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflections-in-intersecting-lines-congruence-exploration/sssssm48</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-in-intersecting-lines-congruence-exploration/sssssm48"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-in-intersecting-lines-congruence-exploration/sssssm48"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-in-intersecting-lines-congruence-exploration/sssssm48"/>
      <lastmod>2026-11-02T17:11:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflections-in-intersecting-lines-congruence-exploration/sssssm48</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-in-intersecting-lines-congruence-exploration/sssssm48"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-in-intersecting-lines-congruence-exploration/sssssm48"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-in-intersecting-lines-congruence-exploration/sssssm48"/>
      <lastmod>2026-11-02T17:11:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/steiner-circum-and-in-ellipse/sssssm4u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/steiner-circum-and-in-ellipse/sssssm4u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/steiner-circum-and-in-ellipse/sssssm4u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/steiner-circum-and-in-ellipse/sssssm4u"/>
      <lastmod>2026-11-01T23:24:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/steiner-circum-and-in-ellipse/sssssm4u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/steiner-circum-and-in-ellipse/sssssm4u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/steiner-circum-and-in-ellipse/sssssm4u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/steiner-circum-and-in-ellipse/sssssm4u"/>
      <lastmod>2026-11-01T23:24:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sum-of-an-infinite-series/sssssm45</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-an-infinite-series/sssssm45"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-an-infinite-series/sssssm45"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-an-infinite-series/sssssm45"/>
      <lastmod>2026-11-01T23:24:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sum-of-an-infinite-series/sssssm45</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-an-infinite-series/sssssm45"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-an-infinite-series/sssssm45"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-an-infinite-series/sssssm45"/>
      <lastmod>2026-11-01T23:24:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lorenz-system/sssssm4b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lorenz-system/sssssm4b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lorenz-system/sssssm4b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lorenz-system/sssssm4b"/>
      <lastmod>2026-11-02T06:08:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lorenz-system/sssssm4b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lorenz-system/sssssm4b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lorenz-system/sssssm4b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lorenz-system/sssssm4b"/>
      <lastmod>2026-11-02T06:08:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/high-school-functions-resources/sssssm43</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/high-school-functions-resources/sssssm43"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/high-school-functions-resources/sssssm43"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/high-school-functions-resources/sssssm43"/>
      <lastmod>2026-11-01T23:12:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/high-school-functions-resources/sssssm43</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/high-school-functions-resources/sssssm43"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/high-school-functions-resources/sssssm43"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/high-school-functions-resources/sssssm43"/>
      <lastmod>2026-11-01T23:12:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/locating-the-center-of-a-given-circle/sssssm4q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locating-the-center-of-a-given-circle/sssssm4q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locating-the-center-of-a-given-circle/sssssm4q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locating-the-center-of-a-given-circle/sssssm4q"/>
      <lastmod>2026-11-01T21:25:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/locating-the-center-of-a-given-circle/sssssm4q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locating-the-center-of-a-given-circle/sssssm4q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locating-the-center-of-a-given-circle/sssssm4q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locating-the-center-of-a-given-circle/sssssm4q"/>
      <lastmod>2026-11-01T21:25:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/activity-12r-perimeter-misconceptions/sssssm41</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/activity-12r-perimeter-misconceptions/sssssm41"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/activity-12r-perimeter-misconceptions/sssssm41"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/activity-12r-perimeter-misconceptions/sssssm41"/>
      <lastmod>2026-11-02T03:05:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/activity-12r-perimeter-misconceptions/sssssm41</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/activity-12r-perimeter-misconceptions/sssssm41"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/activity-12r-perimeter-misconceptions/sssssm41"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/activity-12r-perimeter-misconceptions/sssssm41"/>
      <lastmod>2026-11-02T03:05:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/nature-of-roots-by-ahmad-apriyanto/sssssm4m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nature-of-roots-by-ahmad-apriyanto/sssssm4m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nature-of-roots-by-ahmad-apriyanto/sssssm4m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nature-of-roots-by-ahmad-apriyanto/sssssm4m"/>
      <lastmod>2026-11-02T02:56:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/nature-of-roots-by-ahmad-apriyanto/sssssm4m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nature-of-roots-by-ahmad-apriyanto/sssssm4m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nature-of-roots-by-ahmad-apriyanto/sssssm4m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nature-of-roots-by-ahmad-apriyanto/sssssm4m"/>
      <lastmod>2026-11-02T02:56:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pursuit-curves-dynamic-multi-target-tracking-geometry/sssssm4j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pursuit-curves-dynamic-multi-target-tracking-geometry/sssssm4j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pursuit-curves-dynamic-multi-target-tracking-geometry/sssssm4j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pursuit-curves-dynamic-multi-target-tracking-geometry/sssssm4j"/>
      <lastmod>2026-11-01T19:31:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pursuit-curves-dynamic-multi-target-tracking-geometry/sssssm4j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pursuit-curves-dynamic-multi-target-tracking-geometry/sssssm4j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pursuit-curves-dynamic-multi-target-tracking-geometry/sssssm4j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pursuit-curves-dynamic-multi-target-tracking-geometry/sssssm4j"/>
      <lastmod>2026-11-01T19:31:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-green/sssssm4p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-green/sssssm4p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-green/sssssm4p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-green/sssssm4p"/>
      <lastmod>2026-11-01T21:45:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-green/sssssm4p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-green/sssssm4p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-green/sssssm4p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-green/sssssm4p"/>
      <lastmod>2026-11-01T21:45:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-rectangular-prism-exploring-volume-and-faces/sssssm4w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-rectangular-prism-exploring-volume-and-faces/sssssm4w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-rectangular-prism-exploring-volume-and-faces/sssssm4w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-rectangular-prism-exploring-volume-and-faces/sssssm4w"/>
      <lastmod>2026-11-02T02:36:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-rectangular-prism-exploring-volume-and-faces/sssssm4w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-rectangular-prism-exploring-volume-and-faces/sssssm4w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-rectangular-prism-exploring-volume-and-faces/sssssm4w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-rectangular-prism-exploring-volume-and-faces/sssssm4w"/>
      <lastmod>2026-11-02T02:36:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cavalieri-s-principle-volume/sssssm46</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cavalieri-s-principle-volume/sssssm46"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cavalieri-s-principle-volume/sssssm46"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cavalieri-s-principle-volume/sssssm46"/>
      <lastmod>2026-11-01T23:51:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cavalieri-s-principle-volume/sssssm46</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cavalieri-s-principle-volume/sssssm46"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cavalieri-s-principle-volume/sssssm46"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cavalieri-s-principle-volume/sssssm46"/>
      <lastmod>2026-11-01T23:51:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-trish/sssssm4g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-trish/sssssm4g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-trish/sssssm4g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-trish/sssssm4g"/>
      <lastmod>2026-11-01T23:57:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-trish/sssssm4g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-trish/sssssm4g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-trish/sssssm4g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-trish/sssssm4g"/>
      <lastmod>2026-11-01T23:57:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integral-as-area/sssssm49</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integral-as-area/sssssm49"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integral-as-area/sssssm49"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integral-as-area/sssssm49"/>
      <lastmod>2026-11-01T23:17:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integral-as-area/sssssm49</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integral-as-area/sssssm49"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integral-as-area/sssssm49"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integral-as-area/sssssm49"/>
      <lastmod>2026-11-01T23:17:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plane-through-cube-with-cross-section/sssssm4e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plane-through-cube-with-cross-section/sssssm4e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plane-through-cube-with-cross-section/sssssm4e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plane-through-cube-with-cross-section/sssssm4e"/>
      <lastmod>2026-11-02T16:50:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plane-through-cube-with-cross-section/sssssm4e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plane-through-cube-with-cross-section/sssssm4e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plane-through-cube-with-cross-section/sssssm4e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plane-through-cube-with-cross-section/sssssm4e"/>
      <lastmod>2026-11-02T16:50:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/jerabek-hyperbola-a-special-conic-associated-with-a-triangle-s-circumcenter-and/sssssm4v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/jerabek-hyperbola-a-special-conic-associated-with-a-triangle-s-circumcenter-and/sssssm4v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/jerabek-hyperbola-a-special-conic-associated-with-a-triangle-s-circumcenter-and/sssssm4v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/jerabek-hyperbola-a-special-conic-associated-with-a-triangle-s-circumcenter-and/sssssm4v"/>
      <lastmod>2026-11-02T00:53:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/jerabek-hyperbola-a-special-conic-associated-with-a-triangle-s-circumcenter-and/sssssm4v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/jerabek-hyperbola-a-special-conic-associated-with-a-triangle-s-circumcenter-and/sssssm4v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/jerabek-hyperbola-a-special-conic-associated-with-a-triangle-s-circumcenter-and/sssssm4v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/jerabek-hyperbola-a-special-conic-associated-with-a-triangle-s-circumcenter-and/sssssm4v"/>
      <lastmod>2026-11-02T00:53:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mixing-paint-ratios/sssssm44</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mixing-paint-ratios/sssssm44"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mixing-paint-ratios/sssssm44"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mixing-paint-ratios/sssssm44"/>
      <lastmod>2026-11-02T18:20:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mixing-paint-ratios/sssssm44</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mixing-paint-ratios/sssssm44"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mixing-paint-ratios/sssssm44"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mixing-paint-ratios/sssssm44"/>
      <lastmod>2026-11-02T18:20:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-a-pyramid-by-miguel-quinonez/sssssm4l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-pyramid-by-miguel-quinonez/sssssm4l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-pyramid-by-miguel-quinonez/sssssm4l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-pyramid-by-miguel-quinonez/sssssm4l"/>
      <lastmod>2026-11-02T16:57:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-a-pyramid-by-miguel-quinonez/sssssm4l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-pyramid-by-miguel-quinonez/sssssm4l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-pyramid-by-miguel-quinonez/sssssm4l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-pyramid-by-miguel-quinonez/sssssm4l"/>
      <lastmod>2026-11-02T16:57:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/histogram-by-prabath-p/sssssm4y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-by-prabath-p/sssssm4y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-by-prabath-p/sssssm4y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-by-prabath-p/sssssm4y"/>
      <lastmod>2026-11-01T19:04:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/histogram-by-prabath-p/sssssm4y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-by-prabath-p/sssssm4y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-by-prabath-p/sssssm4y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-by-prabath-p/sssssm4y"/>
      <lastmod>2026-11-01T19:04:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inv-2-1-connecting-congruent-polygons/sssssm4a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inv-2-1-connecting-congruent-polygons/sssssm4a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inv-2-1-connecting-congruent-polygons/sssssm4a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inv-2-1-connecting-congruent-polygons/sssssm4a"/>
      <lastmod>2026-11-02T15:34:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inv-2-1-connecting-congruent-polygons/sssssm4a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inv-2-1-connecting-congruent-polygons/sssssm4a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inv-2-1-connecting-congruent-polygons/sssssm4a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inv-2-1-connecting-congruent-polygons/sssssm4a"/>
      <lastmod>2026-11-02T15:34:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arrange-numbers-in-ascending-order/sssssm4c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arrange-numbers-in-ascending-order/sssssm4c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arrange-numbers-in-ascending-order/sssssm4c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arrange-numbers-in-ascending-order/sssssm4c"/>
      <lastmod>2026-11-02T03:02:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arrange-numbers-in-ascending-order/sssssm4c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arrange-numbers-in-ascending-order/sssssm4c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arrange-numbers-in-ascending-order/sssssm4c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arrange-numbers-in-ascending-order/sssssm4c"/>
      <lastmod>2026-11-02T03:02:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lines-from-points-and-vectors-by-bartsnapp/sssssm4r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lines-from-points-and-vectors-by-bartsnapp/sssssm4r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lines-from-points-and-vectors-by-bartsnapp/sssssm4r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lines-from-points-and-vectors-by-bartsnapp/sssssm4r"/>
      <lastmod>2026-11-02T17:03:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lines-from-points-and-vectors-by-bartsnapp/sssssm4r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lines-from-points-and-vectors-by-bartsnapp/sssssm4r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lines-from-points-and-vectors-by-bartsnapp/sssssm4r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lines-from-points-and-vectors-by-bartsnapp/sssssm4r"/>
      <lastmod>2026-11-02T17:03:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-rhombus-square-geometric-construction-and-classification/sssssm4h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-rhombus-square-geometric-construction-and-classification/sssssm4h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-rhombus-square-geometric-construction-and-classification/sssssm4h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-rhombus-square-geometric-construction-and-classification/sssssm4h"/>
      <lastmod>2026-11-02T06:41:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-rhombus-square-geometric-construction-and-classification/sssssm4h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-rhombus-square-geometric-construction-and-classification/sssssm4h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-rhombus-square-geometric-construction-and-classification/sssssm4h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-rhombus-square-geometric-construction-and-classification/sssssm4h"/>
      <lastmod>2026-11-02T06:41:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-area-calculation/sssssm4t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-area-calculation/sssssm4t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-area-calculation/sssssm4t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-area-calculation/sssssm4t"/>
      <lastmod>2026-11-01T19:25:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-area-calculation/sssssm4t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-area-calculation/sssssm4t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-area-calculation/sssssm4t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-area-calculation/sssssm4t"/>
      <lastmod>2026-11-01T19:25:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/system-of-3-linear-equations-consistent/sssssm4x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/system-of-3-linear-equations-consistent/sssssm4x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/system-of-3-linear-equations-consistent/sssssm4x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/system-of-3-linear-equations-consistent/sssssm4x"/>
      <lastmod>2026-11-02T18:14:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/system-of-3-linear-equations-consistent/sssssm4x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/system-of-3-linear-equations-consistent/sssssm4x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/system-of-3-linear-equations-consistent/sssssm4x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/system-of-3-linear-equations-consistent/sssssm4x"/>
      <lastmod>2026-11-02T18:14:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/congruent-line-segments-demo/sssssm4i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruent-line-segments-demo/sssssm4i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruent-line-segments-demo/sssssm4i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruent-line-segments-demo/sssssm4i"/>
      <lastmod>2026-11-02T17:38:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/congruent-line-segments-demo/sssssm4i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruent-line-segments-demo/sssssm4i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruent-line-segments-demo/sssssm4i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruent-line-segments-demo/sssssm4i"/>
      <lastmod>2026-11-02T17:38:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/identifying-solid-figures/sssssm4o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identifying-solid-figures/sssssm4o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identifying-solid-figures/sssssm4o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identifying-solid-figures/sssssm4o"/>
      <lastmod>2026-11-02T03:11:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/identifying-solid-figures/sssssm4o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identifying-solid-figures/sssssm4o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identifying-solid-figures/sssssm4o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identifying-solid-figures/sssssm4o"/>
      <lastmod>2026-11-02T03:11:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-6-geometry-and-statistics-comprehensive-example/sssssmls</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-6-geometry-and-statistics-comprehensive-example/sssssmls"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-6-geometry-and-statistics-comprehensive-example/sssssmls"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-6-geometry-and-statistics-comprehensive-example/sssssmls"/>
      <lastmod>2026-11-01T21:27:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-6-geometry-and-statistics-comprehensive-example/sssssmls</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-6-geometry-and-statistics-comprehensive-example/sssssmls"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-6-geometry-and-statistics-comprehensive-example/sssssmls"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-6-geometry-and-statistics-comprehensive-example/sssssmls"/>
      <lastmod>2026-11-01T21:27:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/check-for-equilateral-triangle/sssssml7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/check-for-equilateral-triangle/sssssml7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/check-for-equilateral-triangle/sssssml7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/check-for-equilateral-triangle/sssssml7"/>
      <lastmod>2026-11-01T23:12:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/check-for-equilateral-triangle/sssssml7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/check-for-equilateral-triangle/sssssml7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/check-for-equilateral-triangle/sssssml7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/check-for-equilateral-triangle/sssssml7"/>
      <lastmod>2026-11-01T23:12:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proving-triangles-similar-with-geometric-transformations/sssssmln</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proving-triangles-similar-with-geometric-transformations/sssssmln"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proving-triangles-similar-with-geometric-transformations/sssssmln"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proving-triangles-similar-with-geometric-transformations/sssssmln"/>
      <lastmod>2026-11-01T21:41:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proving-triangles-similar-with-geometric-transformations/sssssmln</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proving-triangles-similar-with-geometric-transformations/sssssmln"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proving-triangles-similar-with-geometric-transformations/sssssmln"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proving-triangles-similar-with-geometric-transformations/sssssmln"/>
      <lastmod>2026-11-01T21:41:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/accumulation-function-a-x-and-its-derivative-a-x/sssssml2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/accumulation-function-a-x-and-its-derivative-a-x/sssssml2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/accumulation-function-a-x-and-its-derivative-a-x/sssssml2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/accumulation-function-a-x-and-its-derivative-a-x/sssssml2"/>
      <lastmod>2026-11-02T17:04:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/accumulation-function-a-x-and-its-derivative-a-x/sssssml2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/accumulation-function-a-x-and-its-derivative-a-x/sssssml2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/accumulation-function-a-x-and-its-derivative-a-x/sssssml2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/accumulation-function-a-x-and-its-derivative-a-x/sssssml2"/>
      <lastmod>2026-11-02T17:04:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/nth-roots-of-unity/sssssmlk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nth-roots-of-unity/sssssmlk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nth-roots-of-unity/sssssmlk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nth-roots-of-unity/sssssmlk"/>
      <lastmod>2026-11-02T02:58:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/nth-roots-of-unity/sssssmlk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nth-roots-of-unity/sssssmlk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nth-roots-of-unity/sssssmlk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nth-roots-of-unity/sssssmlk"/>
      <lastmod>2026-11-02T02:58:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/confidence-interval-dynamic-demonstration-normal-binomial/sssssmlz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/confidence-interval-dynamic-demonstration-normal-binomial/sssssmlz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/confidence-interval-dynamic-demonstration-normal-binomial/sssssmlz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/confidence-interval-dynamic-demonstration-normal-binomial/sssssmlz"/>
      <lastmod>2026-11-01T21:29:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/confidence-interval-dynamic-demonstration-normal-binomial/sssssmlz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/confidence-interval-dynamic-demonstration-normal-binomial/sssssmlz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/confidence-interval-dynamic-demonstration-normal-binomial/sssssmlz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/confidence-interval-dynamic-demonstration-normal-binomial/sssssmlz"/>
      <lastmod>2026-11-01T21:29:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-comparison-cone-and-sphere/sssssml0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-comparison-cone-and-sphere/sssssml0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-comparison-cone-and-sphere/sssssml0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-comparison-cone-and-sphere/sssssml0"/>
      <lastmod>2026-11-02T17:14:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-comparison-cone-and-sphere/sssssml0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-comparison-cone-and-sphere/sssssml0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-comparison-cone-and-sphere/sssssml0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-comparison-cone-and-sphere/sssssml0"/>
      <lastmod>2026-11-02T17:14:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linearity-2-geometric-transformations/sssssmld</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linearity-2-geometric-transformations/sssssmld"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linearity-2-geometric-transformations/sssssmld"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linearity-2-geometric-transformations/sssssmld"/>
      <lastmod>2026-11-02T17:35:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linearity-2-geometric-transformations/sssssmld</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linearity-2-geometric-transformations/sssssmld"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linearity-2-geometric-transformations/sssssmld"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linearity-2-geometric-transformations/sssssmld"/>
      <lastmod>2026-11-02T17:35:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformations-of-polynomial-functions/sssssmlf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-of-polynomial-functions/sssssmlf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-of-polynomial-functions/sssssmlf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-of-polynomial-functions/sssssmlf"/>
      <lastmod>2026-11-02T15:55:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformations-of-polynomial-functions/sssssmlf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-of-polynomial-functions/sssssmlf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-of-polynomial-functions/sssssmlf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-of-polynomial-functions/sssssmlf"/>
      <lastmod>2026-11-02T15:55:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-area-calculation-by-math-teachers-adventure-of-ict-integration/sssssml8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-area-calculation-by-math-teachers-adventure-of-ict-integration/sssssml8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-area-calculation-by-math-teachers-adventure-of-ict-integration/sssssml8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-area-calculation-by-math-teachers-adventure-of-ict-integration/sssssml8"/>
      <lastmod>2026-11-02T09:06:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-area-calculation-by-math-teachers-adventure-of-ict-integration/sssssml8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-area-calculation-by-math-teachers-adventure-of-ict-integration/sssssml8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-area-calculation-by-math-teachers-adventure-of-ict-integration/sssssml8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-area-calculation-by-math-teachers-adventure-of-ict-integration/sssssml8"/>
      <lastmod>2026-11-02T09:06:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/understanding-slope/sssssmlu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/understanding-slope/sssssmlu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/understanding-slope/sssssmlu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/understanding-slope/sssssmlu"/>
      <lastmod>2026-11-01T21:23:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/understanding-slope/sssssmlu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/understanding-slope/sssssmlu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/understanding-slope/sssssmlu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/understanding-slope/sssssmlu"/>
      <lastmod>2026-11-01T21:23:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/phantom-graph-trisectrix-of-maclaurin/sssssml5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-trisectrix-of-maclaurin/sssssml5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-trisectrix-of-maclaurin/sssssml5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-trisectrix-of-maclaurin/sssssml5"/>
      <lastmod>2026-11-02T18:30:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/phantom-graph-trisectrix-of-maclaurin/sssssml5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-trisectrix-of-maclaurin/sssssml5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-trisectrix-of-maclaurin/sssssml5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-trisectrix-of-maclaurin/sssssml5"/>
      <lastmod>2026-11-02T18:30:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilations-on-a-square-grid-practice/sssssmlb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-on-a-square-grid-practice/sssssmlb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-on-a-square-grid-practice/sssssmlb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-on-a-square-grid-practice/sssssmlb"/>
      <lastmod>2026-11-01T23:02:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilations-on-a-square-grid-practice/sssssmlb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-on-a-square-grid-practice/sssssmlb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-on-a-square-grid-practice/sssssmlb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-on-a-square-grid-practice/sssssmlb"/>
      <lastmod>2026-11-01T23:02:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-a-regular-heptagon/sssssml3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-regular-heptagon/sssssml3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-regular-heptagon/sssssml3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-regular-heptagon/sssssml3"/>
      <lastmod>2026-11-02T17:56:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-a-regular-heptagon/sssssml3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-regular-heptagon/sssssml3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-regular-heptagon/sssssml3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-regular-heptagon/sssssml3"/>
      <lastmod>2026-11-02T17:56:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles/sssssmlq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles/sssssmlq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles/sssssmlq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles/sssssmlq"/>
      <lastmod>2026-11-01T21:19:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles/sssssmlq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles/sssssmlq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles/sssssmlq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles/sssssmlq"/>
      <lastmod>2026-11-01T21:19:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-template-step-2/sssssml1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-template-step-2/sssssml1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-template-step-2/sssssml1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-template-step-2/sssssml1"/>
      <lastmod>2026-11-01T20:53:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-template-step-2/sssssml1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-template-step-2/sssssml1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-template-step-2/sssssml1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-template-step-2/sssssml1"/>
      <lastmod>2026-11-01T20:53:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/style-bar-adjusting-visual-properties-of-geometric-objects-in-geogebra/sssssmlm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/style-bar-adjusting-visual-properties-of-geometric-objects-in-geogebra/sssssmlm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/style-bar-adjusting-visual-properties-of-geometric-objects-in-geogebra/sssssmlm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/style-bar-adjusting-visual-properties-of-geometric-objects-in-geogebra/sssssmlm"/>
      <lastmod>2026-11-01T22:05:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/style-bar-adjusting-visual-properties-of-geometric-objects-in-geogebra/sssssmlm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/style-bar-adjusting-visual-properties-of-geometric-objects-in-geogebra/sssssmlm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/style-bar-adjusting-visual-properties-of-geometric-objects-in-geogebra/sssssmlm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/style-bar-adjusting-visual-properties-of-geometric-objects-in-geogebra/sssssmlm"/>
      <lastmod>2026-11-01T22:05:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-truncated-demonstration/sssssmlj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-truncated-demonstration/sssssmlj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-truncated-demonstration/sssssmlj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-truncated-demonstration/sssssmlj"/>
      <lastmod>2026-11-01T20:48:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-truncated-demonstration/sssssmlj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-truncated-demonstration/sssssmlj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-truncated-demonstration/sssssmlj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-truncated-demonstration/sssssmlj"/>
      <lastmod>2026-11-01T20:48:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-ratio-by-john-sweeney/sssssmlp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-ratio-by-john-sweeney/sssssmlp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-ratio-by-john-sweeney/sssssmlp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-ratio-by-john-sweeney/sssssmlp"/>
      <lastmod>2026-11-02T16:35:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-ratio-by-john-sweeney/sssssmlp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-ratio-by-john-sweeney/sssssmlp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-ratio-by-john-sweeney/sssssmlp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-ratio-by-john-sweeney/sssssmlp"/>
      <lastmod>2026-11-02T16:35:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/velocity-and-acceleration/sssssmlw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/velocity-and-acceleration/sssssmlw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/velocity-and-acceleration/sssssmlw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/velocity-and-acceleration/sssssmlw"/>
      <lastmod>2026-11-01T23:53:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/velocity-and-acceleration/sssssmlw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/velocity-and-acceleration/sssssmlw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/velocity-and-acceleration/sssssmlw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/velocity-and-acceleration/sssssmlw"/>
      <lastmod>2026-11-01T23:53:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-area-demonstration/sssssml6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-area-demonstration/sssssml6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-area-demonstration/sssssml6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-area-demonstration/sssssml6"/>
      <lastmod>2026-11-01T19:02:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-area-demonstration/sssssml6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-area-demonstration/sssssml6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-area-demonstration/sssssml6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-area-demonstration/sssssml6"/>
      <lastmod>2026-11-01T19:02:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-root-f-x-h-example/sssssmlg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-f-x-h-example/sssssmlg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-f-x-h-example/sssssmlg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-f-x-h-example/sssssmlg"/>
      <lastmod>2026-11-02T18:06:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-root-f-x-h-example/sssssmlg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-f-x-h-example/sssssmlg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-f-x-h-example/sssssmlg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-f-x-h-example/sssssmlg"/>
      <lastmod>2026-11-02T18:06:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/euler-line-and-triangle-centers/sssssml9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euler-line-and-triangle-centers/sssssml9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euler-line-and-triangle-centers/sssssml9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euler-line-and-triangle-centers/sssssml9"/>
      <lastmod>2026-11-02T18:57:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/euler-line-and-triangle-centers/sssssml9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euler-line-and-triangle-centers/sssssml9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euler-line-and-triangle-centers/sssssml9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euler-line-and-triangle-centers/sssssml9"/>
      <lastmod>2026-11-02T18:57:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unfolding-a-cube/sssssmle</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unfolding-a-cube/sssssmle"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unfolding-a-cube/sssssmle"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unfolding-a-cube/sssssmle"/>
      <lastmod>2026-11-01T19:34:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unfolding-a-cube/sssssmle</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unfolding-a-cube/sssssmle"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unfolding-a-cube/sssssmle"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unfolding-a-cube/sssssmle"/>
      <lastmod>2026-11-01T19:34:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-roots-of-a-perfect-number/sssssmlv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-roots-of-a-perfect-number/sssssmlv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-roots-of-a-perfect-number/sssssmlv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-roots-of-a-perfect-number/sssssmlv"/>
      <lastmod>2026-11-02T18:51:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-roots-of-a-perfect-number/sssssmlv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-roots-of-a-perfect-number/sssssmlv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-roots-of-a-perfect-number/sssssmlv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-roots-of-a-perfect-number/sssssmlv"/>
      <lastmod>2026-11-02T18:51:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/is-a-trapezoid-a-parallelogram/sssssml4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/is-a-trapezoid-a-parallelogram/sssssml4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/is-a-trapezoid-a-parallelogram/sssssml4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/is-a-trapezoid-a-parallelogram/sssssml4"/>
      <lastmod>2026-11-01T23:49:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/is-a-trapezoid-a-parallelogram/sssssml4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/is-a-trapezoid-a-parallelogram/sssssml4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/is-a-trapezoid-a-parallelogram/sssssml4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/is-a-trapezoid-a-parallelogram/sssssml4"/>
      <lastmod>2026-11-01T23:49:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-tangent-graph/sssssmll</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-tangent-graph/sssssmll"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-tangent-graph/sssssmll"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-tangent-graph/sssssmll"/>
      <lastmod>2026-11-01T21:56:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-tangent-graph/sssssmll</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-tangent-graph/sssssmll"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-tangent-graph/sssssmll"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-tangent-graph/sssssmll"/>
      <lastmod>2026-11-01T21:56:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangle-area-theorem-demo/sssssmly</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangle-area-theorem-demo/sssssmly"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangle-area-theorem-demo/sssssmly"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangle-area-theorem-demo/sssssmly"/>
      <lastmod>2026-11-02T03:12:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangle-area-theorem-demo/sssssmly</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangle-area-theorem-demo/sssssmly"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangle-area-theorem-demo/sssssmly"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangle-area-theorem-demo/sssssmly"/>
      <lastmod>2026-11-02T03:12:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-mean-demonstration-by-redean6/sssssmla</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-mean-demonstration-by-redean6/sssssmla"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-mean-demonstration-by-redean6/sssssmla"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-mean-demonstration-by-redean6/sssssmla"/>
      <lastmod>2026-11-02T08:47:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-mean-demonstration-by-redean6/sssssmla</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-mean-demonstration-by-redean6/sssssmla"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-mean-demonstration-by-redean6/sssssmla"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-mean-demonstration-by-redean6/sssssmla"/>
      <lastmod>2026-11-02T08:47:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-modeling/sssssmlc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-modeling/sssssmlc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-modeling/sssssmlc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-modeling/sssssmlc"/>
      <lastmod>2026-11-02T18:41:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-modeling/sssssmlc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-modeling/sssssmlc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-modeling/sssssmlc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-modeling/sssssmlc"/>
      <lastmod>2026-11-02T18:41:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/optimization-of-rectangle-under-cosine/sssssmlr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/optimization-of-rectangle-under-cosine/sssssmlr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/optimization-of-rectangle-under-cosine/sssssmlr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/optimization-of-rectangle-under-cosine/sssssmlr"/>
      <lastmod>2026-11-02T18:30:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/optimization-of-rectangle-under-cosine/sssssmlr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/optimization-of-rectangle-under-cosine/sssssmlr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/optimization-of-rectangle-under-cosine/sssssmlr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/optimization-of-rectangle-under-cosine/sssssmlr"/>
      <lastmod>2026-11-02T18:30:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parametric-curve-demo-by-guillermo-bautista/sssssmlh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-curve-demo-by-guillermo-bautista/sssssmlh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-curve-demo-by-guillermo-bautista/sssssmlh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-curve-demo-by-guillermo-bautista/sssssmlh"/>
      <lastmod>2026-11-01T20:58:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parametric-curve-demo-by-guillermo-bautista/sssssmlh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-curve-demo-by-guillermo-bautista/sssssmlh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-curve-demo-by-guillermo-bautista/sssssmlh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-curve-demo-by-guillermo-bautista/sssssmlh"/>
      <lastmod>2026-11-01T20:58:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangles-and-perimeter/sssssmlt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangles-and-perimeter/sssssmlt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangles-and-perimeter/sssssmlt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangles-and-perimeter/sssssmlt"/>
      <lastmod>2026-11-02T18:50:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangles-and-perimeter/sssssmlt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangles-and-perimeter/sssssmlt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangles-and-perimeter/sssssmlt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangles-and-perimeter/sssssmlt"/>
      <lastmod>2026-11-02T18:50:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arithmetic-sequence-and-geometric-construction/sssssmlx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-and-geometric-construction/sssssmlx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-sequence-and-geometric-construction/sssssmlx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-and-geometric-construction/sssssmlx"/>
      <lastmod>2026-11-02T02:28:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arithmetic-sequence-and-geometric-construction/sssssmlx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-and-geometric-construction/sssssmlx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-sequence-and-geometric-construction/sssssmlx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-and-geometric-construction/sssssmlx"/>
      <lastmod>2026-11-02T02:28:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetries-of-regular-polygons-rotational-symmetry/sssssmli</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetries-of-regular-polygons-rotational-symmetry/sssssmli"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetries-of-regular-polygons-rotational-symmetry/sssssmli"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetries-of-regular-polygons-rotational-symmetry/sssssmli"/>
      <lastmod>2026-11-01T22:06:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetries-of-regular-polygons-rotational-symmetry/sssssmli</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetries-of-regular-polygons-rotational-symmetry/sssssmli"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetries-of-regular-polygons-rotational-symmetry/sssssmli"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetries-of-regular-polygons-rotational-symmetry/sssssmli"/>
      <lastmod>2026-11-01T22:06:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivatives-of-sine-cosine/sssssmlo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivatives-of-sine-cosine/sssssmlo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivatives-of-sine-cosine/sssssmlo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivatives-of-sine-cosine/sssssmlo"/>
      <lastmod>2026-11-02T13:38:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivatives-of-sine-cosine/sssssmlo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivatives-of-sine-cosine/sssssmlo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivatives-of-sine-cosine/sssssmlo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivatives-of-sine-cosine/sssssmlo"/>
      <lastmod>2026-11-02T13:38:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/islamic-tessellation-grid-rhombi/sssssmys</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-tessellation-grid-rhombi/sssssmys"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-tessellation-grid-rhombi/sssssmys"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-tessellation-grid-rhombi/sssssmys"/>
      <lastmod>2026-11-02T00:28:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/islamic-tessellation-grid-rhombi/sssssmys</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-tessellation-grid-rhombi/sssssmys"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-tessellation-grid-rhombi/sssssmys"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-tessellation-grid-rhombi/sssssmys"/>
      <lastmod>2026-11-02T00:28:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/particle-polarity-exchanger-v1-1-dynamic-3d-geometry-demo/sssssmy7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/particle-polarity-exchanger-v1-1-dynamic-3d-geometry-demo/sssssmy7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/particle-polarity-exchanger-v1-1-dynamic-3d-geometry-demo/sssssmy7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/particle-polarity-exchanger-v1-1-dynamic-3d-geometry-demo/sssssmy7"/>
      <lastmod>2026-11-01T21:23:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/particle-polarity-exchanger-v1-1-dynamic-3d-geometry-demo/sssssmy7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/particle-polarity-exchanger-v1-1-dynamic-3d-geometry-demo/sssssmy7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/particle-polarity-exchanger-v1-1-dynamic-3d-geometry-demo/sssssmy7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/particle-polarity-exchanger-v1-1-dynamic-3d-geometry-demo/sssssmy7"/>
      <lastmod>2026-11-01T21:23:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/harter-heighway-dragon-fractal/sssssmyn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/harter-heighway-dragon-fractal/sssssmyn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/harter-heighway-dragon-fractal/sssssmyn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/harter-heighway-dragon-fractal/sssssmyn"/>
      <lastmod>2026-11-02T16:36:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/harter-heighway-dragon-fractal/sssssmyn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/harter-heighway-dragon-fractal/sssssmyn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/harter-heighway-dragon-fractal/sssssmyn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/harter-heighway-dragon-fractal/sssssmyn"/>
      <lastmod>2026-11-02T16:36:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-plane-to-a-surface-of-revolution/sssssmy2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-plane-to-a-surface-of-revolution/sssssmy2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-plane-to-a-surface-of-revolution/sssssmy2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-plane-to-a-surface-of-revolution/sssssmy2"/>
      <lastmod>2026-11-01T20:50:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-plane-to-a-surface-of-revolution/sssssmy2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-plane-to-a-surface-of-revolution/sssssmy2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-plane-to-a-surface-of-revolution/sssssmy2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-plane-to-a-surface-of-revolution/sssssmy2"/>
      <lastmod>2026-11-01T20:50:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-and-hexagon/sssssmyk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-and-hexagon/sssssmyk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-and-hexagon/sssssmyk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-and-hexagon/sssssmyk"/>
      <lastmod>2026-11-02T02:32:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-and-hexagon/sssssmyk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-and-hexagon/sssssmyk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-and-hexagon/sssssmyk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-and-hexagon/sssssmyk"/>
      <lastmod>2026-11-02T02:32:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gradients-of-straight-lines/sssssmyz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gradients-of-straight-lines/sssssmyz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gradients-of-straight-lines/sssssmyz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gradients-of-straight-lines/sssssmyz"/>
      <lastmod>2026-11-02T12:45:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gradients-of-straight-lines/sssssmyz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gradients-of-straight-lines/sssssmyz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gradients-of-straight-lines/sssssmyz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gradients-of-straight-lines/sssssmyz"/>
      <lastmod>2026-11-02T12:45:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cameroon-covid-19-cases-bar-chart/sssssmy0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cameroon-covid-19-cases-bar-chart/sssssmy0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cameroon-covid-19-cases-bar-chart/sssssmy0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cameroon-covid-19-cases-bar-chart/sssssmy0"/>
      <lastmod>2026-11-01T20:43:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cameroon-covid-19-cases-bar-chart/sssssmy0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cameroon-covid-19-cases-bar-chart/sssssmy0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cameroon-covid-19-cases-bar-chart/sssssmy0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cameroon-covid-19-cases-bar-chart/sssssmy0"/>
      <lastmod>2026-11-01T20:43:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphical-derivation-of-sin-x/sssssmyd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-derivation-of-sin-x/sssssmyd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-derivation-of-sin-x/sssssmyd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-derivation-of-sin-x/sssssmyd"/>
      <lastmod>2026-11-01T20:50:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphical-derivation-of-sin-x/sssssmyd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-derivation-of-sin-x/sssssmyd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-derivation-of-sin-x/sssssmyd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-derivation-of-sin-x/sssssmyd"/>
      <lastmod>2026-11-01T20:50:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/evaluate-nth-root/sssssmyf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/evaluate-nth-root/sssssmyf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/evaluate-nth-root/sssssmyf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/evaluate-nth-root/sssssmyf"/>
      <lastmod>2026-11-02T18:02:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/evaluate-nth-root/sssssmyf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/evaluate-nth-root/sssssmyf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/evaluate-nth-root/sssssmyf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/evaluate-nth-root/sssssmyf"/>
      <lastmod>2026-11-02T18:02:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/completed-ferris-wheel-formulas-example/sssssmy8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/completed-ferris-wheel-formulas-example/sssssmy8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/completed-ferris-wheel-formulas-example/sssssmy8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/completed-ferris-wheel-formulas-example/sssssmy8"/>
      <lastmod>2026-11-02T16:55:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/completed-ferris-wheel-formulas-example/sssssmy8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/completed-ferris-wheel-formulas-example/sssssmy8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/completed-ferris-wheel-formulas-example/sssssmy8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/completed-ferris-wheel-formulas-example/sssssmy8"/>
      <lastmod>2026-11-02T16:55:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/using-cylinders-to-show-volume-of-revolution-by-andrew-hitchman/sssssmyu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-cylinders-to-show-volume-of-revolution-by-andrew-hitchman/sssssmyu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-cylinders-to-show-volume-of-revolution-by-andrew-hitchman/sssssmyu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-cylinders-to-show-volume-of-revolution-by-andrew-hitchman/sssssmyu"/>
      <lastmod>2026-11-02T16:56:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/using-cylinders-to-show-volume-of-revolution-by-andrew-hitchman/sssssmyu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-cylinders-to-show-volume-of-revolution-by-andrew-hitchman/sssssmyu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-cylinders-to-show-volume-of-revolution-by-andrew-hitchman/sssssmyu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-cylinders-to-show-volume-of-revolution-by-andrew-hitchman/sssssmyu"/>
      <lastmod>2026-11-02T16:56:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cross-product-and-cauchy-binet-parallelograms/sssssmy5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-product-and-cauchy-binet-parallelograms/sssssmy5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-product-and-cauchy-binet-parallelograms/sssssmy5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-product-and-cauchy-binet-parallelograms/sssssmy5"/>
      <lastmod>2026-11-02T16:45:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cross-product-and-cauchy-binet-parallelograms/sssssmy5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-product-and-cauchy-binet-parallelograms/sssssmy5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-product-and-cauchy-binet-parallelograms/sssssmy5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-product-and-cauchy-binet-parallelograms/sssssmy5"/>
      <lastmod>2026-11-02T16:45:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/program-car-mna/sssssmyb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/program-car-mna/sssssmyb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/program-car-mna/sssssmyb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/program-car-mna/sssssmyb"/>
      <lastmod>2026-11-01T21:18:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/program-car-mna/sssssmyb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/program-car-mna/sssssmyb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/program-car-mna/sssssmyb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/program-car-mna/sssssmyb"/>
      <lastmod>2026-11-01T21:18:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-constructions/sssssmy3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-constructions/sssssmy3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-constructions/sssssmy3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-constructions/sssssmy3"/>
      <lastmod>2026-11-02T12:49:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-constructions/sssssmy3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-constructions/sssssmy3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-constructions/sssssmy3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-constructions/sssssmy3"/>
      <lastmod>2026-11-02T12:49:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-formula-for-circle-area-via-triangle/sssssmyq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-formula-for-circle-area-via-triangle/sssssmyq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-formula-for-circle-area-via-triangle/sssssmyq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-formula-for-circle-area-via-triangle/sssssmyq"/>
      <lastmod>2026-11-02T18:01:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-formula-for-circle-area-via-triangle/sssssmyq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-formula-for-circle-area-via-triangle/sssssmyq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-formula-for-circle-area-via-triangle/sssssmyq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-formula-for-circle-area-via-triangle/sssssmyq"/>
      <lastmod>2026-11-02T18:01:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/random-subtraction-number-demo/sssssmy1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-subtraction-number-demo/sssssmy1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-subtraction-number-demo/sssssmy1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-subtraction-number-demo/sssssmy1"/>
      <lastmod>2026-11-02T16:33:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/random-subtraction-number-demo/sssssmy1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-subtraction-number-demo/sssssmy1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-subtraction-number-demo/sssssmy1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-subtraction-number-demo/sssssmy1"/>
      <lastmod>2026-11-02T16:33:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-triangles-and-parallelograms-on-a-triangle-by-doug-kuhlmann/sssssmym</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-triangles-and-parallelograms-on-a-triangle-by-doug-kuhlmann/sssssmym"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-triangles-and-parallelograms-on-a-triangle-by-doug-kuhlmann/sssssmym"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-triangles-and-parallelograms-on-a-triangle-by-doug-kuhlmann/sssssmym"/>
      <lastmod>2026-11-02T18:05:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-triangles-and-parallelograms-on-a-triangle-by-doug-kuhlmann/sssssmym</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-triangles-and-parallelograms-on-a-triangle-by-doug-kuhlmann/sssssmym"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-triangles-and-parallelograms-on-a-triangle-by-doug-kuhlmann/sssssmym"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-triangles-and-parallelograms-on-a-triangle-by-doug-kuhlmann/sssssmym"/>
      <lastmod>2026-11-02T18:05:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-a-triangle-with-its-medians/sssssmyj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-triangle-with-its-medians/sssssmyj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-triangle-with-its-medians/sssssmyj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-triangle-with-its-medians/sssssmyj"/>
      <lastmod>2026-11-01T20:46:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-a-triangle-with-its-medians/sssssmyj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-triangle-with-its-medians/sssssmyj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-triangle-with-its-medians/sssssmyj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-triangle-with-its-medians/sssssmyj"/>
      <lastmod>2026-11-01T20:46:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-cylinder-by-danielhenry/sssssmyp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cylinder-by-danielhenry/sssssmyp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cylinder-by-danielhenry/sssssmyp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cylinder-by-danielhenry/sssssmyp"/>
      <lastmod>2026-11-01T19:24:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-a-cylinder-by-danielhenry/sssssmyp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cylinder-by-danielhenry/sssssmyp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cylinder-by-danielhenry/sssssmyp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cylinder-by-danielhenry/sssssmyp"/>
      <lastmod>2026-11-01T19:24:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parkland-puzzle-2-logic-and-arithmetic-in-3d-solids/sssssmyw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parkland-puzzle-2-logic-and-arithmetic-in-3d-solids/sssssmyw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parkland-puzzle-2-logic-and-arithmetic-in-3d-solids/sssssmyw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parkland-puzzle-2-logic-and-arithmetic-in-3d-solids/sssssmyw"/>
      <lastmod>2026-11-01T21:53:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parkland-puzzle-2-logic-and-arithmetic-in-3d-solids/sssssmyw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parkland-puzzle-2-logic-and-arithmetic-in-3d-solids/sssssmyw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parkland-puzzle-2-logic-and-arithmetic-in-3d-solids/sssssmyw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parkland-puzzle-2-logic-and-arithmetic-in-3d-solids/sssssmyw"/>
      <lastmod>2026-11-01T21:53:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/nets-of-a-cube-by-robin-anamalay/sssssmy6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nets-of-a-cube-by-robin-anamalay/sssssmy6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nets-of-a-cube-by-robin-anamalay/sssssmy6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nets-of-a-cube-by-robin-anamalay/sssssmy6"/>
      <lastmod>2026-11-01T21:23:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/nets-of-a-cube-by-robin-anamalay/sssssmy6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nets-of-a-cube-by-robin-anamalay/sssssmy6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nets-of-a-cube-by-robin-anamalay/sssssmy6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nets-of-a-cube-by-robin-anamalay/sssssmy6"/>
      <lastmod>2026-11-01T21:23:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/non-parallel-lines-construction/sssssmyg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/non-parallel-lines-construction/sssssmyg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/non-parallel-lines-construction/sssssmyg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/non-parallel-lines-construction/sssssmyg"/>
      <lastmod>2026-11-01T20:47:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/non-parallel-lines-construction/sssssmyg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/non-parallel-lines-construction/sssssmyg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/non-parallel-lines-construction/sssssmyg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/non-parallel-lines-construction/sssssmyg"/>
      <lastmod>2026-11-01T20:47:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-construction-by-jesussd/sssssmy9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-construction-by-jesussd/sssssmy9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-construction-by-jesussd/sssssmy9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-construction-by-jesussd/sssssmy9"/>
      <lastmod>2026-11-02T18:04:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-construction-by-jesussd/sssssmy9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-construction-by-jesussd/sssssmy9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-construction-by-jesussd/sssssmy9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-construction-by-jesussd/sssssmy9"/>
      <lastmod>2026-11-02T18:04:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inner-isoptic-of-an-ellipse/sssssmye</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inner-isoptic-of-an-ellipse/sssssmye"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inner-isoptic-of-an-ellipse/sssssmye"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inner-isoptic-of-an-ellipse/sssssmye"/>
      <lastmod>2026-11-01T21:09:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inner-isoptic-of-an-ellipse/sssssmye</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inner-isoptic-of-an-ellipse/sssssmye"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inner-isoptic-of-an-ellipse/sssssmye"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inner-isoptic-of-an-ellipse/sssssmye"/>
      <lastmod>2026-11-01T21:09:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-sine-rule-3/sssssmyv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-sine-rule-3/sssssmyv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-sine-rule-3/sssssmyv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-sine-rule-3/sssssmyv"/>
      <lastmod>2026-11-02T02:57:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-sine-rule-3/sssssmyv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-sine-rule-3/sssssmyv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-sine-rule-3/sssssmyv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-sine-rule-3/sssssmyv"/>
      <lastmod>2026-11-02T02:57:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-roots/sssssmy4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-roots/sssssmy4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-roots/sssssmy4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-roots/sssssmy4"/>
      <lastmod>2026-11-02T17:37:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-roots/sssssmy4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-roots/sssssmy4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-roots/sssssmy4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-roots/sssssmy4"/>
      <lastmod>2026-11-02T17:37:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-a-cylinder/sssssmyl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-cylinder/sssssmyl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-cylinder/sssssmyl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-cylinder/sssssmyl"/>
      <lastmod>2026-11-02T18:52:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-a-cylinder/sssssmyl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-cylinder/sssssmyl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-cylinder/sssssmyl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-cylinder/sssssmyl"/>
      <lastmod>2026-11-02T18:52:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/distance-between-a-line-and-a-plane-without-vectors/sssssmyy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-between-a-line-and-a-plane-without-vectors/sssssmyy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-between-a-line-and-a-plane-without-vectors/sssssmyy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-between-a-line-and-a-plane-without-vectors/sssssmyy"/>
      <lastmod>2026-11-02T17:46:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/distance-between-a-line-and-a-plane-without-vectors/sssssmyy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-between-a-line-and-a-plane-without-vectors/sssssmyy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-between-a-line-and-a-plane-without-vectors/sssssmyy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-between-a-line-and-a-plane-without-vectors/sssssmyy"/>
      <lastmod>2026-11-02T17:46:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-exploration-by-amanda-vanus/sssssmya</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-exploration-by-amanda-vanus/sssssmya"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-exploration-by-amanda-vanus/sssssmya"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-exploration-by-amanda-vanus/sssssmya"/>
      <lastmod>2026-11-02T16:46:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-exploration-by-amanda-vanus/sssssmya</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-exploration-by-amanda-vanus/sssssmya"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-exploration-by-amanda-vanus/sssssmya"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-exploration-by-amanda-vanus/sssssmya"/>
      <lastmod>2026-11-02T16:46:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-and-polygon-construction/sssssmyc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-and-polygon-construction/sssssmyc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-and-polygon-construction/sssssmyc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-and-polygon-construction/sssssmyc"/>
      <lastmod>2026-11-02T17:02:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-and-polygon-construction/sssssmyc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-and-polygon-construction/sssssmyc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-and-polygon-construction/sssssmyc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-and-polygon-construction/sssssmyc"/>
      <lastmod>2026-11-02T17:02:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dancing-points-on-regular-polygons/sssssmyr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dancing-points-on-regular-polygons/sssssmyr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dancing-points-on-regular-polygons/sssssmyr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dancing-points-on-regular-polygons/sssssmyr"/>
      <lastmod>2026-11-02T17:38:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dancing-points-on-regular-polygons/sssssmyr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dancing-points-on-regular-polygons/sssssmyr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dancing-points-on-regular-polygons/sssssmyr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dancing-points-on-regular-polygons/sssssmyr"/>
      <lastmod>2026-11-02T17:38:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-practice-sections-2-3-2-5/sssssmyh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-practice-sections-2-3-2-5/sssssmyh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-practice-sections-2-3-2-5/sssssmyh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-practice-sections-2-3-2-5/sssssmyh"/>
      <lastmod>2026-11-02T13:16:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-practice-sections-2-3-2-5/sssssmyh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-practice-sections-2-3-2-5/sssssmyh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-practice-sections-2-3-2-5/sssssmyh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-practice-sections-2-3-2-5/sssssmyh"/>
      <lastmod>2026-11-02T13:16:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/operations-on-linear-relations/sssssmyt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/operations-on-linear-relations/sssssmyt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/operations-on-linear-relations/sssssmyt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/operations-on-linear-relations/sssssmyt"/>
      <lastmod>2026-11-01T23:34:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/operations-on-linear-relations/sssssmyt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/operations-on-linear-relations/sssssmyt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/operations-on-linear-relations/sssssmyt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/operations-on-linear-relations/sssssmyt"/>
      <lastmod>2026-11-01T23:34:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-and-bar-chart-optimization-exercise/sssssmyx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-and-bar-chart-optimization-exercise/sssssmyx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-and-bar-chart-optimization-exercise/sssssmyx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-and-bar-chart-optimization-exercise/sssssmyx"/>
      <lastmod>2026-11-02T18:04:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-and-bar-chart-optimization-exercise/sssssmyx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-and-bar-chart-optimization-exercise/sssssmyx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-and-bar-chart-optimization-exercise/sssssmyx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-and-bar-chart-optimization-exercise/sssssmyx"/>
      <lastmod>2026-11-02T18:04:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-area-example/sssssmyi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-area-example/sssssmyi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-area-example/sssssmyi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-area-example/sssssmyi"/>
      <lastmod>2026-11-02T17:01:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-area-example/sssssmyi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-area-example/sssssmyi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-area-example/sssssmyi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-area-example/sssssmyi"/>
      <lastmod>2026-11-02T17:01:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/p4-perimeter-q2/sssssmyo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p4-perimeter-q2/sssssmyo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p4-perimeter-q2/sssssmyo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p4-perimeter-q2/sssssmyo"/>
      <lastmod>2026-11-01T23:59:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/p4-perimeter-q2/sssssmyo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p4-perimeter-q2/sssssmyo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p4-perimeter-q2/sssssmyo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p4-perimeter-q2/sssssmyo"/>
      <lastmod>2026-11-01T23:59:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-and-exploring-equilateral-triangles/sssssmas</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-and-exploring-equilateral-triangles/sssssmas"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-and-exploring-equilateral-triangles/sssssmas"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-and-exploring-equilateral-triangles/sssssmas"/>
      <lastmod>2026-11-02T18:47:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-and-exploring-equilateral-triangles/sssssmas</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-and-exploring-equilateral-triangles/sssssmas"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-and-exploring-equilateral-triangles/sssssmas"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-and-exploring-equilateral-triangles/sssssmas"/>
      <lastmod>2026-11-02T18:47:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drag-3-points-to-the-line-w-initial-value-and-fractions/sssssma7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drag-3-points-to-the-line-w-initial-value-and-fractions/sssssma7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drag-3-points-to-the-line-w-initial-value-and-fractions/sssssma7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drag-3-points-to-the-line-w-initial-value-and-fractions/sssssma7"/>
      <lastmod>2026-11-02T15:01:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drag-3-points-to-the-line-w-initial-value-and-fractions/sssssma7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drag-3-points-to-the-line-w-initial-value-and-fractions/sssssma7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drag-3-points-to-the-line-w-initial-value-and-fractions/sssssma7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drag-3-points-to-the-line-w-initial-value-and-fractions/sssssma7"/>
      <lastmod>2026-11-02T15:01:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphical-limits/sssssman</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-limits/sssssman"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-limits/sssssman"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-limits/sssssman"/>
      <lastmod>2026-11-01T23:48:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphical-limits/sssssman</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-limits/sssssman"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-limits/sssssman"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-limits/sssssman"/>
      <lastmod>2026-11-01T23:48:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/t-test-of-a-mean/sssssma2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/t-test-of-a-mean/sssssma2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/t-test-of-a-mean/sssssma2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/t-test-of-a-mean/sssssma2"/>
      <lastmod>2026-11-01T22:09:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/t-test-of-a-mean/sssssma2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/t-test-of-a-mean/sssssma2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/t-test-of-a-mean/sssssma2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/t-test-of-a-mean/sssssma2"/>
      <lastmod>2026-11-01T22:09:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/law-of-small-numbers/sssssmak</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-small-numbers/sssssmak"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-small-numbers/sssssmak"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-small-numbers/sssssmak"/>
      <lastmod>2026-11-02T16:31:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/law-of-small-numbers/sssssmak</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-small-numbers/sssssmak"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-small-numbers/sssssmak"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-small-numbers/sssssmak"/>
      <lastmod>2026-11-02T16:31:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-example-for-class-ix/sssssmaz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-example-for-class-ix/sssssmaz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-example-for-class-ix/sssssmaz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-example-for-class-ix/sssssmaz"/>
      <lastmod>2026-11-01T21:16:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-example-for-class-ix/sssssmaz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-example-for-class-ix/sssssmaz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-example-for-class-ix/sssssmaz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-example-for-class-ix/sssssmaz"/>
      <lastmod>2026-11-01T21:16:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cosine-grapher/sssssma0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-grapher/sssssma0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-grapher/sssssma0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-grapher/sssssma0"/>
      <lastmod>2026-11-02T16:29:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cosine-grapher/sssssma0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-grapher/sssssma0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-grapher/sssssma0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-grapher/sssssma0"/>
      <lastmod>2026-11-02T16:29:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dodecahedron-family/sssssmad</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dodecahedron-family/sssssmad"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dodecahedron-family/sssssmad"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dodecahedron-family/sssssmad"/>
      <lastmod>2026-11-02T18:09:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dodecahedron-family/sssssmad</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dodecahedron-family/sssssmad"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dodecahedron-family/sssssmad"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dodecahedron-family/sssssmad"/>
      <lastmod>2026-11-02T18:09:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/creative-geometric-construction-demo/sssssmaf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/creative-geometric-construction-demo/sssssmaf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/creative-geometric-construction-demo/sssssmaf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/creative-geometric-construction-demo/sssssmaf"/>
      <lastmod>2026-11-02T02:22:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/creative-geometric-construction-demo/sssssmaf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/creative-geometric-construction-demo/sssssmaf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/creative-geometric-construction-demo/sssssmaf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/creative-geometric-construction-demo/sssssmaf"/>
      <lastmod>2026-11-02T02:22:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/aaa-exploration-in-hyperbolic-geometry/sssssma8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/aaa-exploration-in-hyperbolic-geometry/sssssma8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/aaa-exploration-in-hyperbolic-geometry/sssssma8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/aaa-exploration-in-hyperbolic-geometry/sssssma8"/>
      <lastmod>2026-11-01T19:23:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/aaa-exploration-in-hyperbolic-geometry/sssssma8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/aaa-exploration-in-hyperbolic-geometry/sssssma8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/aaa-exploration-in-hyperbolic-geometry/sssssma8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/aaa-exploration-in-hyperbolic-geometry/sssssma8"/>
      <lastmod>2026-11-01T19:23:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/summing-three-cubes-interactive-exploration-of-integer-cube-sums/sssssmau</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/summing-three-cubes-interactive-exploration-of-integer-cube-sums/sssssmau"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/summing-three-cubes-interactive-exploration-of-integer-cube-sums/sssssmau"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/summing-three-cubes-interactive-exploration-of-integer-cube-sums/sssssmau"/>
      <lastmod>2026-11-02T00:54:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/summing-three-cubes-interactive-exploration-of-integer-cube-sums/sssssmau</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/summing-three-cubes-interactive-exploration-of-integer-cube-sums/sssssmau"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/summing-three-cubes-interactive-exploration-of-integer-cube-sums/sssssmau"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/summing-three-cubes-interactive-exploration-of-integer-cube-sums/sssssmau"/>
      <lastmod>2026-11-02T00:54:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-algebra-geometry-interactive-example/sssssma5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-algebra-geometry-interactive-example/sssssma5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-algebra-geometry-interactive-example/sssssma5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-algebra-geometry-interactive-example/sssssma5"/>
      <lastmod>2026-11-02T16:56:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-algebra-geometry-interactive-example/sssssma5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-algebra-geometry-interactive-example/sssssma5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-algebra-geometry-interactive-example/sssssma5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-algebra-geometry-interactive-example/sssssma5"/>
      <lastmod>2026-11-02T16:56:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-spheres-with-proof/sssssmab</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-spheres-with-proof/sssssmab"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-spheres-with-proof/sssssmab"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-spheres-with-proof/sssssmab"/>
      <lastmod>2026-11-02T17:36:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-spheres-with-proof/sssssmab</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-spheres-with-proof/sssssmab"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-spheres-with-proof/sssssmab"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-spheres-with-proof/sssssmab"/>
      <lastmod>2026-11-02T17:36:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-its-geometric-properties/sssssma3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-its-geometric-properties/sssssma3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-its-geometric-properties/sssssma3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-its-geometric-properties/sssssma3"/>
      <lastmod>2026-11-02T00:54:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-its-geometric-properties/sssssma3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-its-geometric-properties/sssssma3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-its-geometric-properties/sssssma3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-its-geometric-properties/sssssma3"/>
      <lastmod>2026-11-02T00:54:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-of-revolution-with-volume-element/sssssmaq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-with-volume-element/sssssmaq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-with-volume-element/sssssmaq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-with-volume-element/sssssmaq"/>
      <lastmod>2026-11-01T23:13:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-of-revolution-with-volume-element/sssssmaq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-with-volume-element/sssssmaq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-with-volume-element/sssssmaq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-with-volume-element/sssssmaq"/>
      <lastmod>2026-11-01T23:13:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformations-of-the-cubic-function/sssssma1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-of-the-cubic-function/sssssma1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-of-the-cubic-function/sssssma1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-of-the-cubic-function/sssssma1"/>
      <lastmod>2026-11-01T22:00:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformations-of-the-cubic-function/sssssma1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-of-the-cubic-function/sssssma1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-of-the-cubic-function/sssssma1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-of-the-cubic-function/sssssma1"/>
      <lastmod>2026-11-01T22:00:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/horizontal-cross-section-of-a-triangular-pyramid/sssssmam</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-cross-section-of-a-triangular-pyramid/sssssmam"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-cross-section-of-a-triangular-pyramid/sssssmam"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-cross-section-of-a-triangular-pyramid/sssssmam"/>
      <lastmod>2026-11-01T19:22:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/horizontal-cross-section-of-a-triangular-pyramid/sssssmam</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-cross-section-of-a-triangular-pyramid/sssssmam"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-cross-section-of-a-triangular-pyramid/sssssmam"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-cross-section-of-a-triangular-pyramid/sssssmam"/>
      <lastmod>2026-11-01T19:22:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/google-chrome-logo-geometric-construction/sssssmaj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/google-chrome-logo-geometric-construction/sssssmaj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/google-chrome-logo-geometric-construction/sssssmaj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/google-chrome-logo-geometric-construction/sssssmaj"/>
      <lastmod>2026-11-01T21:27:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/google-chrome-logo-geometric-construction/sssssmaj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/google-chrome-logo-geometric-construction/sssssmaj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/google-chrome-logo-geometric-construction/sssssmaj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/google-chrome-logo-geometric-construction/sssssmaj"/>
      <lastmod>2026-11-01T21:27:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-by-stacey-goode/sssssmap</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-by-stacey-goode/sssssmap"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-rectangular-prism-by-stacey-goode/sssssmap"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-by-stacey-goode/sssssmap"/>
      <lastmod>2026-11-02T17:02:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-a-rectangular-prism-by-stacey-goode/sssssmap</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-by-stacey-goode/sssssmap"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-rectangular-prism-by-stacey-goode/sssssmap"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-by-stacey-goode/sssssmap"/>
      <lastmod>2026-11-02T17:02:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-area-calculation-demo/sssssmaw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-area-calculation-demo/sssssmaw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-area-calculation-demo/sssssmaw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-area-calculation-demo/sssssmaw"/>
      <lastmod>2026-11-02T13:34:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-area-calculation-demo/sssssmaw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-area-calculation-demo/sssssmaw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-area-calculation-demo/sssssmaw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-area-calculation-demo/sssssmaw"/>
      <lastmod>2026-11-02T13:34:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volumes-of-revolution/sssssma6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-of-revolution/sssssma6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-of-revolution/sssssma6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-of-revolution/sssssma6"/>
      <lastmod>2026-11-02T17:16:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volumes-of-revolution/sssssma6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-of-revolution/sssssma6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-of-revolution/sssssma6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-of-revolution/sssssma6"/>
      <lastmod>2026-11-02T17:16:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/limits-visualization/sssssmag</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-visualization/sssssmag"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-visualization/sssssmag"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-visualization/sssssmag"/>
      <lastmod>2026-11-02T16:44:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/limits-visualization/sssssmag</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-visualization/sssssmag"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-visualization/sssssmag"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-visualization/sssssmag"/>
      <lastmod>2026-11-02T16:44:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-demonstration-by-kathleen/sssssma9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-demonstration-by-kathleen/sssssma9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-demonstration-by-kathleen/sssssma9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-demonstration-by-kathleen/sssssma9"/>
      <lastmod>2026-11-01T21:23:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-demonstration-by-kathleen/sssssma9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-demonstration-by-kathleen/sssssma9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-demonstration-by-kathleen/sssssma9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-demonstration-by-kathleen/sssssma9"/>
      <lastmod>2026-11-01T21:23:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflecting-about-lines/sssssmae</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflecting-about-lines/sssssmae"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflecting-about-lines/sssssmae"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflecting-about-lines/sssssmae"/>
      <lastmod>2026-11-02T17:40:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflecting-about-lines/sssssmae</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflecting-about-lines/sssssmae"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflecting-about-lines/sssssmae"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflecting-about-lines/sssssmae"/>
      <lastmod>2026-11-02T17:40:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pedal-curve-of-a-parabola-and-focus/sssssmav</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pedal-curve-of-a-parabola-and-focus/sssssmav"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pedal-curve-of-a-parabola-and-focus/sssssmav"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pedal-curve-of-a-parabola-and-focus/sssssmav"/>
      <lastmod>2026-11-02T18:54:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pedal-curve-of-a-parabola-and-focus/sssssmav</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pedal-curve-of-a-parabola-and-focus/sssssmav"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pedal-curve-of-a-parabola-and-focus/sssssmav"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pedal-curve-of-a-parabola-and-focus/sssssmav"/>
      <lastmod>2026-11-02T18:54:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-exponential-functions-by-fernando-vega-cid/sssssma4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-exponential-functions-by-fernando-vega-cid/sssssma4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-exponential-functions-by-fernando-vega-cid/sssssma4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-exponential-functions-by-fernando-vega-cid/sssssma4"/>
      <lastmod>2026-11-01T23:38:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-exponential-functions-by-fernando-vega-cid/sssssma4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-exponential-functions-by-fernando-vega-cid/sssssma4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-exponential-functions-by-fernando-vega-cid/sssssma4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-exponential-functions-by-fernando-vega-cid/sssssma4"/>
      <lastmod>2026-11-01T23:38:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-a-system-with-substitution-3-randomized-interactive-practice/sssssmal</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-a-system-with-substitution-3-randomized-interactive-practice/sssssmal"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-a-system-with-substitution-3-randomized-interactive-practice/sssssmal"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-a-system-with-substitution-3-randomized-interactive-practice/sssssmal"/>
      <lastmod>2026-11-02T16:54:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-a-system-with-substitution-3-randomized-interactive-practice/sssssmal</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-a-system-with-substitution-3-randomized-interactive-practice/sssssmal"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-a-system-with-substitution-3-randomized-interactive-practice/sssssmal"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-a-system-with-substitution-3-randomized-interactive-practice/sssssmal"/>
      <lastmod>2026-11-02T16:54:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/giant-owl-logo-creative-drawing-with-vectors-and-geometric-transformations/sssssmay</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/giant-owl-logo-creative-drawing-with-vectors-and-geometric-transformations/sssssmay"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/giant-owl-logo-creative-drawing-with-vectors-and-geometric-transformations/sssssmay"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/giant-owl-logo-creative-drawing-with-vectors-and-geometric-transformations/sssssmay"/>
      <lastmod>2026-11-01T19:28:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/giant-owl-logo-creative-drawing-with-vectors-and-geometric-transformations/sssssmay</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/giant-owl-logo-creative-drawing-with-vectors-and-geometric-transformations/sssssmay"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/giant-owl-logo-creative-drawing-with-vectors-and-geometric-transformations/sssssmay"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/giant-owl-logo-creative-drawing-with-vectors-and-geometric-transformations/sssssmay"/>
      <lastmod>2026-11-01T19:28:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-multiple-spheres-3d/sssssmaa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-multiple-spheres-3d/sssssmaa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-multiple-spheres-3d/sssssmaa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-multiple-spheres-3d/sssssmaa"/>
      <lastmod>2026-11-01T22:04:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-multiple-spheres-3d/sssssmaa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-multiple-spheres-3d/sssssmaa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-multiple-spheres-3d/sssssmaa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-multiple-spheres-3d/sssssmaa"/>
      <lastmod>2026-11-01T22:04:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/closest-point-2/sssssmac</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/closest-point-2/sssssmac"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/closest-point-2/sssssmac"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/closest-point-2/sssssmac"/>
      <lastmod>2026-11-01T21:14:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/closest-point-2/sssssmac</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/closest-point-2/sssssmac"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/closest-point-2/sssssmac"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/closest-point-2/sssssmac"/>
      <lastmod>2026-11-01T21:14:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vectors-and-bearings-copy/sssssmar</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-and-bearings-copy/sssssmar"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-and-bearings-copy/sssssmar"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-and-bearings-copy/sssssmar"/>
      <lastmod>2026-11-01T21:31:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vectors-and-bearings-copy/sssssmar</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-and-bearings-copy/sssssmar"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-and-bearings-copy/sssssmar"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-and-bearings-copy/sssssmar"/>
      <lastmod>2026-11-01T21:31:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-pyramid-and-cube-1/sssssmah</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-pyramid-and-cube-1/sssssmah"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-pyramid-and-cube-1/sssssmah"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-pyramid-and-cube-1/sssssmah"/>
      <lastmod>2026-11-02T16:51:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-pyramid-and-cube-1/sssssmah</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-pyramid-and-cube-1/sssssmah"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-pyramid-and-cube-1/sssssmah"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-pyramid-and-cube-1/sssssmah"/>
      <lastmod>2026-11-02T16:51:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/epicycles-tracing-a-square-closed-curve/sssssmat</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/epicycles-tracing-a-square-closed-curve/sssssmat"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/epicycles-tracing-a-square-closed-curve/sssssmat"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/epicycles-tracing-a-square-closed-curve/sssssmat"/>
      <lastmod>2026-11-01T20:45:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/epicycles-tracing-a-square-closed-curve/sssssmat</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/epicycles-tracing-a-square-closed-curve/sssssmat"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/epicycles-tracing-a-square-closed-curve/sssssmat"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/epicycles-tracing-a-square-closed-curve/sssssmat"/>
      <lastmod>2026-11-01T20:45:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-equations-points/sssssmax</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-points/sssssmax"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-points/sssssmax"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-points/sssssmax"/>
      <lastmod>2026-11-01T19:13:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-equations-points/sssssmax</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-points/sssssmax"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-points/sssssmax"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-points/sssssmax"/>
      <lastmod>2026-11-01T19:13:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-symmetry-visualizing-trigonometric-relationships/sssssmai</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-symmetry-visualizing-trigonometric-relationships/sssssmai"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-symmetry-visualizing-trigonometric-relationships/sssssmai"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-symmetry-visualizing-trigonometric-relationships/sssssmai"/>
      <lastmod>2026-11-02T18:56:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-symmetry-visualizing-trigonometric-relationships/sssssmai</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-symmetry-visualizing-trigonometric-relationships/sssssmai"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-symmetry-visualizing-trigonometric-relationships/sssssmai"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-symmetry-visualizing-trigonometric-relationships/sssssmai"/>
      <lastmod>2026-11-02T18:56:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sss-congruence/sssssmao</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-congruence/sssssmao"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-congruence/sssssmao"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-congruence/sssssmao"/>
      <lastmod>2026-11-02T02:58:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sss-congruence/sssssmao</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-congruence/sssssmao"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-congruence/sssssmao"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-congruence/sssssmao"/>
      <lastmod>2026-11-02T02:58:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-simplification/sssssmcs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-simplification/sssssmcs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-simplification/sssssmcs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-simplification/sssssmcs"/>
      <lastmod>2026-11-01T20:52:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-simplification/sssssmcs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-simplification/sssssmcs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-simplification/sssssmcs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-simplification/sssssmcs"/>
      <lastmod>2026-11-01T20:52:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-net-by-sandreeva2001/sssssmc7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-net-by-sandreeva2001/sssssmc7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-net-by-sandreeva2001/sssssmc7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-net-by-sandreeva2001/sssssmc7"/>
      <lastmod>2026-11-01T21:14:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-net-by-sandreeva2001/sssssmc7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-net-by-sandreeva2001/sssssmc7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-net-by-sandreeva2001/sssssmc7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-net-by-sandreeva2001/sssssmc7"/>
      <lastmod>2026-11-01T21:14:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sum-of-angles-in-a-triangle-by-amy-o-brien/sssssmcn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-angles-in-a-triangle-by-amy-o-brien/sssssmcn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-angles-in-a-triangle-by-amy-o-brien/sssssmcn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-angles-in-a-triangle-by-amy-o-brien/sssssmcn"/>
      <lastmod>2026-11-02T14:58:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sum-of-angles-in-a-triangle-by-amy-o-brien/sssssmcn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-angles-in-a-triangle-by-amy-o-brien/sssssmcn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-angles-in-a-triangle-by-amy-o-brien/sssssmcn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-angles-in-a-triangle-by-amy-o-brien/sssssmcn"/>
      <lastmod>2026-11-02T14:58:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-illustration-of-similar-circles/sssssmc2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-similar-circles/sssssmc2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-similar-circles/sssssmc2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-similar-circles/sssssmc2"/>
      <lastmod>2026-11-02T14:52:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-illustration-of-similar-circles/sssssmc2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-similar-circles/sssssmc2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-similar-circles/sssssmc2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-similar-circles/sssssmc2"/>
      <lastmod>2026-11-02T14:52:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangular-envelope/sssssmck</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-envelope/sssssmck"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-envelope/sssssmck"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-envelope/sssssmck"/>
      <lastmod>2026-11-02T17:49:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangular-envelope/sssssmck</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-envelope/sssssmck"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-envelope/sssssmck"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-envelope/sssssmck"/>
      <lastmod>2026-11-02T17:49:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/number-patterns-and-sequences-self-assessment-practice/sssssmcz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-patterns-and-sequences-self-assessment-practice/sssssmcz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-patterns-and-sequences-self-assessment-practice/sssssmcz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-patterns-and-sequences-self-assessment-practice/sssssmcz"/>
      <lastmod>2026-11-02T16:31:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/number-patterns-and-sequences-self-assessment-practice/sssssmcz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-patterns-and-sequences-self-assessment-practice/sssssmcz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-patterns-and-sequences-self-assessment-practice/sssssmcz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-patterns-and-sequences-self-assessment-practice/sssssmcz"/>
      <lastmod>2026-11-02T16:31:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/burj-khalifa-geometric-modeling-practice/sssssmc0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/burj-khalifa-geometric-modeling-practice/sssssmc0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/burj-khalifa-geometric-modeling-practice/sssssmc0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/burj-khalifa-geometric-modeling-practice/sssssmc0"/>
      <lastmod>2026-11-02T10:38:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/burj-khalifa-geometric-modeling-practice/sssssmc0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/burj-khalifa-geometric-modeling-practice/sssssmc0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/burj-khalifa-geometric-modeling-practice/sssssmc0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/burj-khalifa-geometric-modeling-practice/sssssmc0"/>
      <lastmod>2026-11-02T10:38:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-subtraction-demo/sssssmcd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-subtraction-demo/sssssmcd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-subtraction-demo/sssssmcd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-subtraction-demo/sssssmcd"/>
      <lastmod>2026-11-02T15:30:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-subtraction-demo/sssssmcd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-subtraction-demo/sssssmcd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-subtraction-demo/sssssmcd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-subtraction-demo/sssssmcd"/>
      <lastmod>2026-11-02T15:30:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drawing-height-in-parallelogram-and-constructing-area-relation/sssssmcf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-height-in-parallelogram-and-constructing-area-relation/sssssmcf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-height-in-parallelogram-and-constructing-area-relation/sssssmcf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-height-in-parallelogram-and-constructing-area-relation/sssssmcf"/>
      <lastmod>2026-11-02T15:46:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drawing-height-in-parallelogram-and-constructing-area-relation/sssssmcf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-height-in-parallelogram-and-constructing-area-relation/sssssmcf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-height-in-parallelogram-and-constructing-area-relation/sssssmcf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-height-in-parallelogram-and-constructing-area-relation/sssssmcf"/>
      <lastmod>2026-11-02T15:46:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-centroid-demonstration/sssssmc8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-centroid-demonstration/sssssmc8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-centroid-demonstration/sssssmc8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-centroid-demonstration/sssssmc8"/>
      <lastmod>2026-11-02T18:35:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-centroid-demonstration/sssssmc8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-centroid-demonstration/sssssmc8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-centroid-demonstration/sssssmc8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-centroid-demonstration/sssssmc8"/>
      <lastmod>2026-11-02T18:35:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/midpoint-and-length-of-a-line-segment/sssssmcu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/midpoint-and-length-of-a-line-segment/sssssmcu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/midpoint-and-length-of-a-line-segment/sssssmcu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/midpoint-and-length-of-a-line-segment/sssssmcu"/>
      <lastmod>2026-11-02T00:56:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/midpoint-and-length-of-a-line-segment/sssssmcu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/midpoint-and-length-of-a-line-segment/sssssmcu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/midpoint-and-length-of-a-line-segment/sssssmcu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/midpoint-and-length-of-a-line-segment/sssssmcu"/>
      <lastmod>2026-11-02T00:56:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-trigonometric-equations-0-360-degrees/sssssmc5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-trigonometric-equations-0-360-degrees/sssssmc5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-trigonometric-equations-0-360-degrees/sssssmc5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-trigonometric-equations-0-360-degrees/sssssmc5"/>
      <lastmod>2026-11-02T18:48:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-trigonometric-equations-0-360-degrees/sssssmc5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-trigonometric-equations-0-360-degrees/sssssmc5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-trigonometric-equations-0-360-degrees/sssssmc5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-trigonometric-equations-0-360-degrees/sssssmc5"/>
      <lastmod>2026-11-02T18:48:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplying-integers-visualizing-the-rule-of-signs/sssssmcb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-integers-visualizing-the-rule-of-signs/sssssmcb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-integers-visualizing-the-rule-of-signs/sssssmcb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-integers-visualizing-the-rule-of-signs/sssssmcb"/>
      <lastmod>2026-11-01T19:07:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplying-integers-visualizing-the-rule-of-signs/sssssmcb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-integers-visualizing-the-rule-of-signs/sssssmcb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-integers-visualizing-the-rule-of-signs/sssssmcb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-integers-visualizing-the-rule-of-signs/sssssmcb"/>
      <lastmod>2026-11-01T19:07:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadrant-logic-practice/sssssmc3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrant-logic-practice/sssssmc3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrant-logic-practice/sssssmc3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrant-logic-practice/sssssmc3"/>
      <lastmod>2026-11-02T18:48:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadrant-logic-practice/sssssmc3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrant-logic-practice/sssssmc3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrant-logic-practice/sssssmc3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrant-logic-practice/sssssmc3"/>
      <lastmod>2026-11-02T18:48:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-squares/sssssmcq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-squares/sssssmcq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-squares/sssssmcq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-squares/sssssmcq"/>
      <lastmod>2026-11-01T21:40:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-squares/sssssmcq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-squares/sssssmcq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-squares/sssssmcq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-squares/sssssmcq"/>
      <lastmod>2026-11-01T21:40:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-transformation/sssssmc1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-transformation/sssssmc1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-transformation/sssssmc1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-transformation/sssssmc1"/>
      <lastmod>2026-11-02T02:57:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-transformation/sssssmc1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-transformation/sssssmc1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-transformation/sssssmc1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-transformation/sssssmc1"/>
      <lastmod>2026-11-02T02:57:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-net-of-a-square-pyramid-by-karen-handy/sssssmcm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-net-of-a-square-pyramid-by-karen-handy/sssssmcm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-net-of-a-square-pyramid-by-karen-handy/sssssmcm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-net-of-a-square-pyramid-by-karen-handy/sssssmcm"/>
      <lastmod>2026-11-02T02:50:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-net-of-a-square-pyramid-by-karen-handy/sssssmcm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-net-of-a-square-pyramid-by-karen-handy/sssssmcm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-net-of-a-square-pyramid-by-karen-handy/sssssmcm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-net-of-a-square-pyramid-by-karen-handy/sssssmcm"/>
      <lastmod>2026-11-02T02:50:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perimeter-of-irregular-polygon/sssssmcj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-of-irregular-polygon/sssssmcj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-of-irregular-polygon/sssssmcj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-of-irregular-polygon/sssssmcj"/>
      <lastmod>2026-11-02T11:49:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perimeter-of-irregular-polygon/sssssmcj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-of-irregular-polygon/sssssmcj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-of-irregular-polygon/sssssmcj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-of-irregular-polygon/sssssmcj"/>
      <lastmod>2026-11-02T11:49:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/aef-nefp-numerical-estimation-false-position-method-interactive-demo/sssssmcp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/aef-nefp-numerical-estimation-false-position-method-interactive-demo/sssssmcp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/aef-nefp-numerical-estimation-false-position-method-interactive-demo/sssssmcp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/aef-nefp-numerical-estimation-false-position-method-interactive-demo/sssssmcp"/>
      <lastmod>2026-11-02T18:57:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/aef-nefp-numerical-estimation-false-position-method-interactive-demo/sssssmcp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/aef-nefp-numerical-estimation-false-position-method-interactive-demo/sssssmcp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/aef-nefp-numerical-estimation-false-position-method-interactive-demo/sssssmcp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/aef-nefp-numerical-estimation-false-position-method-interactive-demo/sssssmcp"/>
      <lastmod>2026-11-02T18:57:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/decimal-fractions-percentages/sssssmcw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-fractions-percentages/sssssmcw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-fractions-percentages/sssssmcw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-fractions-percentages/sssssmcw"/>
      <lastmod>2026-11-02T13:15:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/decimal-fractions-percentages/sssssmcw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-fractions-percentages/sssssmcw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-fractions-percentages/sssssmcw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-fractions-percentages/sssssmcw"/>
      <lastmod>2026-11-02T13:15:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complementary-supplementary-and-conjugate-angles/sssssmc6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complementary-supplementary-and-conjugate-angles/sssssmc6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complementary-supplementary-and-conjugate-angles/sssssmc6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complementary-supplementary-and-conjugate-angles/sssssmc6"/>
      <lastmod>2026-11-02T18:43:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complementary-supplementary-and-conjugate-angles/sssssmc6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complementary-supplementary-and-conjugate-angles/sssssmc6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complementary-supplementary-and-conjugate-angles/sssssmc6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complementary-supplementary-and-conjugate-angles/sssssmc6"/>
      <lastmod>2026-11-02T18:43:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-a-kite-by-brittney-flores/sssssmcg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-kite-by-brittney-flores/sssssmcg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-kite-by-brittney-flores/sssssmcg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-kite-by-brittney-flores/sssssmcg"/>
      <lastmod>2026-11-02T16:38:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-a-kite-by-brittney-flores/sssssmcg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-kite-by-brittney-flores/sssssmcg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-kite-by-brittney-flores/sssssmcg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-kite-by-brittney-flores/sssssmcg"/>
      <lastmod>2026-11-02T16:38:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integration-approximation-upper-sum-lower-sum-trapezoids/sssssmc9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integration-approximation-upper-sum-lower-sum-trapezoids/sssssmc9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integration-approximation-upper-sum-lower-sum-trapezoids/sssssmc9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integration-approximation-upper-sum-lower-sum-trapezoids/sssssmc9"/>
      <lastmod>2026-11-01T20:48:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integration-approximation-upper-sum-lower-sum-trapezoids/sssssmc9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integration-approximation-upper-sum-lower-sum-trapezoids/sssssmc9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integration-approximation-upper-sum-lower-sum-trapezoids/sssssmc9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integration-approximation-upper-sum-lower-sum-trapezoids/sssssmc9"/>
      <lastmod>2026-11-01T20:48:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-volume-calculation-demo-by-joseph-marutollo/sssssmce</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-demo-by-joseph-marutollo/sssssmce"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-volume-calculation-demo-by-joseph-marutollo/sssssmce"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-demo-by-joseph-marutollo/sssssmce"/>
      <lastmod>2026-11-01T23:44:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-volume-calculation-demo-by-joseph-marutollo/sssssmce</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-demo-by-joseph-marutollo/sssssmce"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-volume-calculation-demo-by-joseph-marutollo/sssssmce"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-demo-by-joseph-marutollo/sssssmce"/>
      <lastmod>2026-11-01T23:44:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spirograph-rolling-circles-on-a-line-or-around-a-circle/sssssmcv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spirograph-rolling-circles-on-a-line-or-around-a-circle/sssssmcv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spirograph-rolling-circles-on-a-line-or-around-a-circle/sssssmcv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spirograph-rolling-circles-on-a-line-or-around-a-circle/sssssmcv"/>
      <lastmod>2026-11-01T21:55:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spirograph-rolling-circles-on-a-line-or-around-a-circle/sssssmcv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spirograph-rolling-circles-on-a-line-or-around-a-circle/sssssmcv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spirograph-rolling-circles-on-a-line-or-around-a-circle/sssssmcv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spirograph-rolling-circles-on-a-line-or-around-a-circle/sssssmcv"/>
      <lastmod>2026-11-01T21:55:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-illustration-of-perpendicular-secant-segments-in-a-circle/sssssmc4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-perpendicular-secant-segments-in-a-circle/sssssmc4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-perpendicular-secant-segments-in-a-circle/sssssmc4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-perpendicular-secant-segments-in-a-circle/sssssmc4"/>
      <lastmod>2026-11-02T16:48:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-illustration-of-perpendicular-secant-segments-in-a-circle/sssssmc4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-perpendicular-secant-segments-in-a-circle/sssssmc4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-perpendicular-secant-segments-in-a-circle/sssssmc4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-perpendicular-secant-segments-in-a-circle/sssssmc4"/>
      <lastmod>2026-11-02T16:48:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vectors-property-3/sssssmcl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-property-3/sssssmcl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-property-3/sssssmcl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-property-3/sssssmcl"/>
      <lastmod>2026-11-02T16:30:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vectors-property-3/sssssmcl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-property-3/sssssmcl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-property-3/sssssmcl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-property-3/sssssmcl"/>
      <lastmod>2026-11-02T16:30:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/alternate-interior-angles/sssssmcy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-interior-angles/sssssmcy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-interior-angles/sssssmcy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-interior-angles/sssssmcy"/>
      <lastmod>2026-11-02T16:50:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/alternate-interior-angles/sssssmcy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-interior-angles/sssssmcy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-interior-angles/sssssmcy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-interior-angles/sssssmcy"/>
      <lastmod>2026-11-02T16:50:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-trigonometric-ratios-of-angles/sssssmca</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-trigonometric-ratios-of-angles/sssssmca"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-trigonometric-ratios-of-angles/sssssmca"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-trigonometric-ratios-of-angles/sssssmca"/>
      <lastmod>2026-11-02T17:57:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-trigonometric-ratios-of-angles/sssssmca</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-trigonometric-ratios-of-angles/sssssmca"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-trigonometric-ratios-of-angles/sssssmca"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-trigonometric-ratios-of-angles/sssssmca"/>
      <lastmod>2026-11-02T17:57:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cosine-graph-from-unit-circle/sssssmcc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-graph-from-unit-circle/sssssmcc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-graph-from-unit-circle/sssssmcc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-graph-from-unit-circle/sssssmcc"/>
      <lastmod>2026-11-01T21:56:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cosine-graph-from-unit-circle/sssssmcc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-graph-from-unit-circle/sssssmcc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-graph-from-unit-circle/sssssmcc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-graph-from-unit-circle/sssssmcc"/>
      <lastmod>2026-11-01T21:56:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arc-measures-intersections-interior-edge/sssssmcr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arc-measures-intersections-interior-edge/sssssmcr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arc-measures-intersections-interior-edge/sssssmcr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arc-measures-intersections-interior-edge/sssssmcr"/>
      <lastmod>2026-11-02T17:42:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arc-measures-intersections-interior-edge/sssssmcr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arc-measures-intersections-interior-edge/sssssmcr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arc-measures-intersections-interior-edge/sssssmcr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arc-measures-intersections-interior-edge/sssssmcr"/>
      <lastmod>2026-11-02T17:42:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/percentages-practice-geogebra-demonstration/sssssmch</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/percentages-practice-geogebra-demonstration/sssssmch"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/percentages-practice-geogebra-demonstration/sssssmch"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/percentages-practice-geogebra-demonstration/sssssmch"/>
      <lastmod>2026-11-01T23:06:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/percentages-practice-geogebra-demonstration/sssssmch</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/percentages-practice-geogebra-demonstration/sssssmch"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/percentages-practice-geogebra-demonstration/sssssmch"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/percentages-practice-geogebra-demonstration/sssssmch"/>
      <lastmod>2026-11-01T23:06:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/one-special-limit-v2-dynamic-exploration-of-logarithmic-functions-and-orthoc/sssssmct</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-special-limit-v2-dynamic-exploration-of-logarithmic-functions-and-orthoc/sssssmct"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-special-limit-v2-dynamic-exploration-of-logarithmic-functions-and-orthoc/sssssmct"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-special-limit-v2-dynamic-exploration-of-logarithmic-functions-and-orthoc/sssssmct"/>
      <lastmod>2026-11-02T18:38:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/one-special-limit-v2-dynamic-exploration-of-logarithmic-functions-and-orthoc/sssssmct</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-special-limit-v2-dynamic-exploration-of-logarithmic-functions-and-orthoc/sssssmct"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-special-limit-v2-dynamic-exploration-of-logarithmic-functions-and-orthoc/sssssmct"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-special-limit-v2-dynamic-exploration-of-logarithmic-functions-and-orthoc/sssssmct"/>
      <lastmod>2026-11-02T18:38:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-transformation-demo-by-dan-dale/sssssmcx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-transformation-demo-by-dan-dale/sssssmcx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-transformation-demo-by-dan-dale/sssssmcx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-transformation-demo-by-dan-dale/sssssmcx"/>
      <lastmod>2026-11-01T19:06:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-transformation-demo-by-dan-dale/sssssmcx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-transformation-demo-by-dan-dale/sssssmcx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-transformation-demo-by-dan-dale/sssssmcx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-transformation-demo-by-dan-dale/sssssmcx"/>
      <lastmod>2026-11-01T19:06:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-graphs-of-rate-time-amount/sssssmci</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-graphs-of-rate-time-amount/sssssmci"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-graphs-of-rate-time-amount/sssssmci"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-graphs-of-rate-time-amount/sssssmci"/>
      <lastmod>2026-11-02T16:46:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-graphs-of-rate-time-amount/sssssmci</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-graphs-of-rate-time-amount/sssssmci"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-graphs-of-rate-time-amount/sssssmci"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-graphs-of-rate-time-amount/sssssmci"/>
      <lastmod>2026-11-02T16:46:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-components/sssssmco</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-components/sssssmco"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-components/sssssmco"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-components/sssssmco"/>
      <lastmod>2026-11-01T22:10:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-components/sssssmco</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-components/sssssmco"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-components/sssssmco"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-components/sssssmco"/>
      <lastmod>2026-11-01T22:10:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/discovering-the-volume-of-triangular-prisms/sssssmrs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discovering-the-volume-of-triangular-prisms/sssssmrs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discovering-the-volume-of-triangular-prisms/sssssmrs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discovering-the-volume-of-triangular-prisms/sssssmrs"/>
      <lastmod>2026-11-01T23:57:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/discovering-the-volume-of-triangular-prisms/sssssmrs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discovering-the-volume-of-triangular-prisms/sssssmrs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discovering-the-volume-of-triangular-prisms/sssssmrs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discovering-the-volume-of-triangular-prisms/sssssmrs"/>
      <lastmod>2026-11-01T23:57:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/chord-properties/sssssmr7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chord-properties/sssssmr7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chord-properties/sssssmr7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chord-properties/sssssmr7"/>
      <lastmod>2026-11-02T08:53:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/chord-properties/sssssmr7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chord-properties/sssssmr7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chord-properties/sssssmr7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chord-properties/sssssmr7"/>
      <lastmod>2026-11-02T08:53:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prism-cylinder-volume-calculation/sssssmrn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-cylinder-volume-calculation/sssssmrn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-cylinder-volume-calculation/sssssmrn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-cylinder-volume-calculation/sssssmrn"/>
      <lastmod>2026-11-02T18:36:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prism-cylinder-volume-calculation/sssssmrn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-cylinder-volume-calculation/sssssmrn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-cylinder-volume-calculation/sssssmrn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-cylinder-volume-calculation/sssssmrn"/>
      <lastmod>2026-11-02T18:36:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/system-of-3-equations-demo/sssssmr2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/system-of-3-equations-demo/sssssmr2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/system-of-3-equations-demo/sssssmr2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/system-of-3-equations-demo/sssssmr2"/>
      <lastmod>2026-11-02T12:00:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/system-of-3-equations-demo/sssssmr2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/system-of-3-equations-demo/sssssmr2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/system-of-3-equations-demo/sssssmr2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/system-of-3-equations-demo/sssssmr2"/>
      <lastmod>2026-11-02T12:00:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-the-cosine-law/sssssmrk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-cosine-law/sssssmrk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-cosine-law/sssssmrk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-cosine-law/sssssmrk"/>
      <lastmod>2026-11-02T18:36:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-the-cosine-law/sssssmrk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-cosine-law/sssssmrk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-cosine-law/sssssmrk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-cosine-law/sssssmrk"/>
      <lastmod>2026-11-02T18:36:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/30-60-90-right-triangle-exploration/sssssmrz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/30-60-90-right-triangle-exploration/sssssmrz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/30-60-90-right-triangle-exploration/sssssmrz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/30-60-90-right-triangle-exploration/sssssmrz"/>
      <lastmod>2026-11-01T21:49:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/30-60-90-right-triangle-exploration/sssssmrz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/30-60-90-right-triangle-exploration/sssssmrz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/30-60-90-right-triangle-exploration/sssssmrz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/30-60-90-right-triangle-exploration/sssssmrz"/>
      <lastmod>2026-11-01T21:49:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-fractions-on-number-lines/sssssmr0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-fractions-on-number-lines/sssssmr0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-fractions-on-number-lines/sssssmr0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-fractions-on-number-lines/sssssmr0"/>
      <lastmod>2026-11-02T02:23:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-fractions-on-number-lines/sssssmr0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-fractions-on-number-lines/sssssmr0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-fractions-on-number-lines/sssssmr0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-fractions-on-number-lines/sssssmr0"/>
      <lastmod>2026-11-02T02:23:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/distance-time-graph/sssssmrd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-time-graph/sssssmrd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-time-graph/sssssmrd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-time-graph/sssssmrd"/>
      <lastmod>2026-11-02T02:27:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/distance-time-graph/sssssmrd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-time-graph/sssssmrd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-time-graph/sssssmrd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-time-graph/sssssmrd"/>
      <lastmod>2026-11-02T02:27:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-and-rectangular-coordinates/sssssmrf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-and-rectangular-coordinates/sssssmrf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-and-rectangular-coordinates/sssssmrf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-and-rectangular-coordinates/sssssmrf"/>
      <lastmod>2026-11-02T11:55:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-and-rectangular-coordinates/sssssmrf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-and-rectangular-coordinates/sssssmrf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-and-rectangular-coordinates/sssssmrf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-and-rectangular-coordinates/sssssmrf"/>
      <lastmod>2026-11-02T11:55:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-views-of-solving-quadratic-equations-by-judah-l-schwartz/sssssmr8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-views-of-solving-quadratic-equations-by-judah-l-schwartz/sssssmr8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-views-of-solving-quadratic-equations-by-judah-l-schwartz/sssssmr8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-views-of-solving-quadratic-equations-by-judah-l-schwartz/sssssmr8"/>
      <lastmod>2026-11-02T00:33:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-views-of-solving-quadratic-equations-by-judah-l-schwartz/sssssmr8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-views-of-solving-quadratic-equations-by-judah-l-schwartz/sssssmr8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-views-of-solving-quadratic-equations-by-judah-l-schwartz/sssssmr8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-views-of-solving-quadratic-equations-by-judah-l-schwartz/sssssmr8"/>
      <lastmod>2026-11-02T00:33:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-area-calculation-by-brittney-flores/sssssmru</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-area-calculation-by-brittney-flores/sssssmru"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-area-calculation-by-brittney-flores/sssssmru"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-area-calculation-by-brittney-flores/sssssmru"/>
      <lastmod>2026-11-02T03:14:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-area-calculation-by-brittney-flores/sssssmru</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-area-calculation-by-brittney-flores/sssssmru"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-area-calculation-by-brittney-flores/sssssmru"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-area-calculation-by-brittney-flores/sssssmru"/>
      <lastmod>2026-11-02T03:14:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-volume-exploration-module-pythagorean-theorem-sequence-construction/sssssmr5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-volume-exploration-module-pythagorean-theorem-sequence-construction/sssssmr5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-volume-exploration-module-pythagorean-theorem-sequence-construction/sssssmr5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-volume-exploration-module-pythagorean-theorem-sequence-construction/sssssmr5"/>
      <lastmod>2026-11-02T00:38:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-volume-exploration-module-pythagorean-theorem-sequence-construction/sssssmr5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-volume-exploration-module-pythagorean-theorem-sequence-construction/sssssmr5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-volume-exploration-module-pythagorean-theorem-sequence-construction/sssssmr5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-volume-exploration-module-pythagorean-theorem-sequence-construction/sssssmr5"/>
      <lastmod>2026-11-02T00:38:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-area-calculation-by-ibrahim-el-hage/sssssmrb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-area-calculation-by-ibrahim-el-hage/sssssmrb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-area-calculation-by-ibrahim-el-hage/sssssmrb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-area-calculation-by-ibrahim-el-hage/sssssmrb"/>
      <lastmod>2026-11-02T16:55:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-area-calculation-by-ibrahim-el-hage/sssssmrb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-area-calculation-by-ibrahim-el-hage/sssssmrb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-area-calculation-by-ibrahim-el-hage/sssssmrb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-area-calculation-by-ibrahim-el-hage/sssssmrb"/>
      <lastmod>2026-11-02T16:55:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-6-4-8-practice-how-much-in-each-group-part-1/sssssmr3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-4-8-practice-how-much-in-each-group-part-1/sssssmr3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-4-8-practice-how-much-in-each-group-part-1/sssssmr3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-4-8-practice-how-much-in-each-group-part-1/sssssmr3"/>
      <lastmod>2026-11-02T10:38:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-6-4-8-practice-how-much-in-each-group-part-1/sssssmr3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-4-8-practice-how-much-in-each-group-part-1/sssssmr3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-4-8-practice-how-much-in-each-group-part-1/sssssmr3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-4-8-practice-how-much-in-each-group-part-1/sssssmr3"/>
      <lastmod>2026-11-02T10:38:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-fractions-by-celia-jimenez/sssssmrq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-fractions-by-celia-jimenez/sssssmrq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-fractions-by-celia-jimenez/sssssmrq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-fractions-by-celia-jimenez/sssssmrq"/>
      <lastmod>2026-11-02T13:16:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-fractions-by-celia-jimenez/sssssmrq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-fractions-by-celia-jimenez/sssssmrq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-fractions-by-celia-jimenez/sssssmrq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-fractions-by-celia-jimenez/sssssmrq"/>
      <lastmod>2026-11-02T13:16:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-polygon-relationships/sssssmr1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-polygon-relationships/sssssmr1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-polygon-relationships/sssssmr1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-polygon-relationships/sssssmr1"/>
      <lastmod>2026-11-01T23:35:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-polygon-relationships/sssssmr1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-polygon-relationships/sssssmr1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-polygon-relationships/sssssmr1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-polygon-relationships/sssssmr1"/>
      <lastmod>2026-11-01T23:35:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-properties-and-construction/sssssmrm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-properties-and-construction/sssssmrm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-properties-and-construction/sssssmrm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-properties-and-construction/sssssmrm"/>
      <lastmod>2026-11-02T00:12:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-properties-and-construction/sssssmrm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-properties-and-construction/sssssmrm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-properties-and-construction/sssssmrm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-properties-and-construction/sssssmrm"/>
      <lastmod>2026-11-02T00:12:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-and-cosine-curves-from-unit-circle/sssssmrj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-and-cosine-curves-from-unit-circle/sssssmrj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-and-cosine-curves-from-unit-circle/sssssmrj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-and-cosine-curves-from-unit-circle/sssssmrj"/>
      <lastmod>2026-11-01T21:20:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-and-cosine-curves-from-unit-circle/sssssmrj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-and-cosine-curves-from-unit-circle/sssssmrj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-and-cosine-curves-from-unit-circle/sssssmrj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-and-cosine-curves-from-unit-circle/sssssmrj"/>
      <lastmod>2026-11-01T21:20:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/aa-triangle-similarity-theorem/sssssmrp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/aa-triangle-similarity-theorem/sssssmrp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/aa-triangle-similarity-theorem/sssssmrp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/aa-triangle-similarity-theorem/sssssmrp"/>
      <lastmod>2026-11-01T23:58:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/aa-triangle-similarity-theorem/sssssmrp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/aa-triangle-similarity-theorem/sssssmrp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/aa-triangle-similarity-theorem/sssssmrp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/aa-triangle-similarity-theorem/sssssmrp"/>
      <lastmod>2026-11-01T23:58:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-hexagonal-segments-and-conic-intersections/sssssmrw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-hexagonal-segments-and-conic-intersections/sssssmrw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-hexagonal-segments-and-conic-intersections/sssssmrw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-hexagonal-segments-and-conic-intersections/sssssmrw"/>
      <lastmod>2026-11-02T00:51:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-hexagonal-segments-and-conic-intersections/sssssmrw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-hexagonal-segments-and-conic-intersections/sssssmrw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-hexagonal-segments-and-conic-intersections/sssssmrw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-hexagonal-segments-and-conic-intersections/sssssmrw"/>
      <lastmod>2026-11-02T00:51:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-100-doors-puzzle/sssssmr6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-100-doors-puzzle/sssssmr6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-100-doors-puzzle/sssssmr6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-100-doors-puzzle/sssssmr6"/>
      <lastmod>2026-11-01T21:10:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-100-doors-puzzle/sssssmr6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-100-doors-puzzle/sssssmr6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-100-doors-puzzle/sssssmr6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-100-doors-puzzle/sssssmr6"/>
      <lastmod>2026-11-01T21:10:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-integer-solutions-in-linear-programming/sssssmrg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-integer-solutions-in-linear-programming/sssssmrg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-integer-solutions-in-linear-programming/sssssmrg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-integer-solutions-in-linear-programming/sssssmrg"/>
      <lastmod>2026-11-01T19:02:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-integer-solutions-in-linear-programming/sssssmrg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-integer-solutions-in-linear-programming/sssssmrg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-integer-solutions-in-linear-programming/sssssmrg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-integer-solutions-in-linear-programming/sssssmrg"/>
      <lastmod>2026-11-01T19:02:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-equations-and-function-graphs/sssssmr9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-and-function-graphs/sssssmr9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-and-function-graphs/sssssmr9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-and-function-graphs/sssssmr9"/>
      <lastmod>2026-11-02T18:56:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-equations-and-function-graphs/sssssmr9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-and-function-graphs/sssssmr9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-and-function-graphs/sssssmr9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-and-function-graphs/sssssmr9"/>
      <lastmod>2026-11-02T18:56:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/copy-a-line-segment-by-christina-nardella/sssssmre</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copy-a-line-segment-by-christina-nardella/sssssmre"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copy-a-line-segment-by-christina-nardella/sssssmre"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copy-a-line-segment-by-christina-nardella/sssssmre"/>
      <lastmod>2026-11-02T00:31:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/copy-a-line-segment-by-christina-nardella/sssssmre</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copy-a-line-segment-by-christina-nardella/sssssmre"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copy-a-line-segment-by-christina-nardella/sssssmre"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copy-a-line-segment-by-christina-nardella/sssssmre"/>
      <lastmod>2026-11-02T00:31:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabolic-segment-covering-proposal/sssssmrv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolic-segment-covering-proposal/sssssmrv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolic-segment-covering-proposal/sssssmrv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolic-segment-covering-proposal/sssssmrv"/>
      <lastmod>2026-11-01T21:39:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabolic-segment-covering-proposal/sssssmrv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolic-segment-covering-proposal/sssssmrv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolic-segment-covering-proposal/sssssmrv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolic-segment-covering-proposal/sssssmrv"/>
      <lastmod>2026-11-01T21:39:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-and-orthogonal-plane-construction/sssssmr4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-and-orthogonal-plane-construction/sssssmr4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-and-orthogonal-plane-construction/sssssmr4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-and-orthogonal-plane-construction/sssssmr4"/>
      <lastmod>2026-11-01T19:31:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-and-orthogonal-plane-construction/sssssmr4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-and-orthogonal-plane-construction/sssssmr4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-and-orthogonal-plane-construction/sssssmr4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-and-orthogonal-plane-construction/sssssmr4"/>
      <lastmod>2026-11-01T19:31:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/negative-binomial-distribution/sssssmrl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/negative-binomial-distribution/sssssmrl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/negative-binomial-distribution/sssssmrl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/negative-binomial-distribution/sssssmrl"/>
      <lastmod>2026-11-01T23:47:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/negative-binomial-distribution/sssssmrl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/negative-binomial-distribution/sssssmrl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/negative-binomial-distribution/sssssmrl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/negative-binomial-distribution/sssssmrl"/>
      <lastmod>2026-11-01T23:47:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/left-and-right-limits/sssssmry</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/left-and-right-limits/sssssmry"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/left-and-right-limits/sssssmry"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/left-and-right-limits/sssssmry"/>
      <lastmod>2026-11-01T23:22:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/left-and-right-limits/sssssmry</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/left-and-right-limits/sssssmry"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/left-and-right-limits/sssssmry"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/left-and-right-limits/sssssmry"/>
      <lastmod>2026-11-01T23:22:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-perpendicular-bisector-intersection-in-triangles/sssssmra</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-perpendicular-bisector-intersection-in-triangles/sssssmra"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-perpendicular-bisector-intersection-in-triangles/sssssmra"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-perpendicular-bisector-intersection-in-triangles/sssssmra"/>
      <lastmod>2026-11-02T00:21:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-perpendicular-bisector-intersection-in-triangles/sssssmra</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-perpendicular-bisector-intersection-in-triangles/sssssmra"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-perpendicular-bisector-intersection-in-triangles/sssssmra"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-perpendicular-bisector-intersection-in-triangles/sssssmra"/>
      <lastmod>2026-11-02T00:21:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ssa-test-for-similarity-of-triangles/sssssmrc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ssa-test-for-similarity-of-triangles/sssssmrc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ssa-test-for-similarity-of-triangles/sssssmrc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ssa-test-for-similarity-of-triangles/sssssmrc"/>
      <lastmod>2026-11-01T19:26:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ssa-test-for-similarity-of-triangles/sssssmrc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ssa-test-for-similarity-of-triangles/sssssmrc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ssa-test-for-similarity-of-triangles/sssssmrc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ssa-test-for-similarity-of-triangles/sssssmrc"/>
      <lastmod>2026-11-01T19:26:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-linear-distributions/sssssmrr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-linear-distributions/sssssmrr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-linear-distributions/sssssmrr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-linear-distributions/sssssmrr"/>
      <lastmod>2026-11-01T20:44:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-linear-distributions/sssssmrr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-linear-distributions/sssssmrr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-linear-distributions/sssssmrr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-linear-distributions/sssssmrr"/>
      <lastmod>2026-11-01T20:44:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/oloide/sssssmrh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oloide/sssssmrh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oloide/sssssmrh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oloide/sssssmrh"/>
      <lastmod>2026-11-01T23:44:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/oloide/sssssmrh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oloide/sssssmrh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oloide/sssssmrh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oloide/sssssmrh"/>
      <lastmod>2026-11-01T23:44:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-and-verifying-congruent-line-segments/sssssmrt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-and-verifying-congruent-line-segments/sssssmrt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-and-verifying-congruent-line-segments/sssssmrt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-and-verifying-congruent-line-segments/sssssmrt"/>
      <lastmod>2026-11-02T18:53:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-and-verifying-congruent-line-segments/sssssmrt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-and-verifying-congruent-line-segments/sssssmrt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-and-verifying-congruent-line-segments/sssssmrt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-and-verifying-congruent-line-segments/sssssmrt"/>
      <lastmod>2026-11-02T18:53:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-circles-theorem-3-demo/sssssmrx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-circles-theorem-3-demo/sssssmrx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-circles-theorem-3-demo/sssssmrx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-circles-theorem-3-demo/sssssmrx"/>
      <lastmod>2026-11-01T22:10:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-circles-theorem-3-demo/sssssmrx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-circles-theorem-3-demo/sssssmrx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-circles-theorem-3-demo/sssssmrx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-circles-theorem-3-demo/sssssmrx"/>
      <lastmod>2026-11-01T22:10:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-exploration/sssssmri</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-exploration/sssssmri"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-exploration/sssssmri"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-exploration/sssssmri"/>
      <lastmod>2026-11-01T19:32:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-exploration/sssssmri</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-exploration/sssssmri"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-exploration/sssssmri"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-exploration/sssssmri"/>
      <lastmod>2026-11-01T19:32:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-mevrouwfisscher/sssssmro</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-mevrouwfisscher/sssssmro"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-mevrouwfisscher/sssssmro"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-mevrouwfisscher/sssssmro"/>
      <lastmod>2026-11-01T19:16:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-mevrouwfisscher/sssssmro</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-mevrouwfisscher/sssssmro"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-mevrouwfisscher/sssssmro"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-mevrouwfisscher/sssssmro"/>
      <lastmod>2026-11-01T19:16:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/alternate-segment-theorem-demonstration/sssssmhs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-segment-theorem-demonstration/sssssmhs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-segment-theorem-demonstration/sssssmhs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-segment-theorem-demonstration/sssssmhs"/>
      <lastmod>2026-11-01T23:31:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/alternate-segment-theorem-demonstration/sssssmhs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-segment-theorem-demonstration/sssssmhs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-segment-theorem-demonstration/sssssmhs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-segment-theorem-demonstration/sssssmhs"/>
      <lastmod>2026-11-01T23:31:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/system-of-inequalities-investigation/sssssmh7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/system-of-inequalities-investigation/sssssmh7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/system-of-inequalities-investigation/sssssmh7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/system-of-inequalities-investigation/sssssmh7"/>
      <lastmod>2026-11-02T18:09:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/system-of-inequalities-investigation/sssssmh7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/system-of-inequalities-investigation/sssssmh7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/system-of-inequalities-investigation/sssssmh7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/system-of-inequalities-investigation/sssssmh7"/>
      <lastmod>2026-11-02T18:09:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-triangles-with-fixed-perimeter/sssssmhn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-triangles-with-fixed-perimeter/sssssmhn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-triangles-with-fixed-perimeter/sssssmhn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-triangles-with-fixed-perimeter/sssssmhn"/>
      <lastmod>2026-11-02T12:10:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-triangles-with-fixed-perimeter/sssssmhn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-triangles-with-fixed-perimeter/sssssmhn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-triangles-with-fixed-perimeter/sssssmhn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-triangles-with-fixed-perimeter/sssssmhn"/>
      <lastmod>2026-11-02T12:10:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/classifying-rational-numbers-by-ibrahim-el-hage/sssssmh2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/classifying-rational-numbers-by-ibrahim-el-hage/sssssmh2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/classifying-rational-numbers-by-ibrahim-el-hage/sssssmh2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/classifying-rational-numbers-by-ibrahim-el-hage/sssssmh2"/>
      <lastmod>2026-11-02T18:39:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/classifying-rational-numbers-by-ibrahim-el-hage/sssssmh2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/classifying-rational-numbers-by-ibrahim-el-hage/sssssmh2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/classifying-rational-numbers-by-ibrahim-el-hage/sssssmh2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/classifying-rational-numbers-by-ibrahim-el-hage/sssssmh2"/>
      <lastmod>2026-11-02T18:39:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-and-tangent-line-demonstration/sssssmhk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-and-tangent-line-demonstration/sssssmhk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-and-tangent-line-demonstration/sssssmhk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-and-tangent-line-demonstration/sssssmhk"/>
      <lastmod>2026-11-02T18:01:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-and-tangent-line-demonstration/sssssmhk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-and-tangent-line-demonstration/sssssmhk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-and-tangent-line-demonstration/sssssmhk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-and-tangent-line-demonstration/sssssmhk"/>
      <lastmod>2026-11-02T18:01:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/accumulation-curve/sssssmhz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/accumulation-curve/sssssmhz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/accumulation-curve/sssssmhz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/accumulation-curve/sssssmhz"/>
      <lastmod>2026-11-02T18:55:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/accumulation-curve/sssssmhz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/accumulation-curve/sssssmhz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/accumulation-curve/sssssmhz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/accumulation-curve/sssssmhz"/>
      <lastmod>2026-11-02T18:55:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slope-and-y-intercept/sssssmh0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-and-y-intercept/sssssmh0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-and-y-intercept/sssssmh0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-and-y-intercept/sssssmh0"/>
      <lastmod>2026-11-01T19:16:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slope-and-y-intercept/sssssmh0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-and-y-intercept/sssssmh0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-and-y-intercept/sssssmh0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-and-y-intercept/sssssmh0"/>
      <lastmod>2026-11-01T19:16:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/minimize-surface-area-of-a-cylinder/sssssmhd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/minimize-surface-area-of-a-cylinder/sssssmhd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/minimize-surface-area-of-a-cylinder/sssssmhd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/minimize-surface-area-of-a-cylinder/sssssmhd"/>
      <lastmod>2026-11-02T17:39:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/minimize-surface-area-of-a-cylinder/sssssmhd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/minimize-surface-area-of-a-cylinder/sssssmhd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/minimize-surface-area-of-a-cylinder/sssssmhd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/minimize-surface-area-of-a-cylinder/sssssmhd"/>
      <lastmod>2026-11-02T17:39:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-sum-playground/sssssmhf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-sum-playground/sssssmhf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-sum-playground/sssssmhf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-sum-playground/sssssmhf"/>
      <lastmod>2026-11-01T21:18:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-sum-playground/sssssmhf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-sum-playground/sssssmhf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-sum-playground/sssssmhf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-sum-playground/sssssmhf"/>
      <lastmod>2026-11-01T21:18:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surfaces-between-curves/sssssmh8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surfaces-between-curves/sssssmh8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surfaces-between-curves/sssssmh8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surfaces-between-curves/sssssmh8"/>
      <lastmod>2026-11-02T08:52:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surfaces-between-curves/sssssmh8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surfaces-between-curves/sssssmh8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surfaces-between-curves/sssssmh8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surfaces-between-curves/sssssmh8"/>
      <lastmod>2026-11-02T08:52:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simple-volumes-of-revolution/sssssmhu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-volumes-of-revolution/sssssmhu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-volumes-of-revolution/sssssmhu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-volumes-of-revolution/sssssmhu"/>
      <lastmod>2026-11-02T10:40:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simple-volumes-of-revolution/sssssmhu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-volumes-of-revolution/sssssmhu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-volumes-of-revolution/sssssmhu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-volumes-of-revolution/sssssmhu"/>
      <lastmod>2026-11-02T10:40:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-areas-of-parallelograms/sssssmh5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-areas-of-parallelograms/sssssmh5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-areas-of-parallelograms/sssssmh5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-areas-of-parallelograms/sssssmh5"/>
      <lastmod>2026-11-01T19:21:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-areas-of-parallelograms/sssssmh5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-areas-of-parallelograms/sssssmh5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-areas-of-parallelograms/sssssmh5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-areas-of-parallelograms/sssssmh5"/>
      <lastmod>2026-11-01T19:21:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-and-cone-volume-comparison/sssssmhb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-and-cone-volume-comparison/sssssmhb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-and-cone-volume-comparison/sssssmhb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-and-cone-volume-comparison/sssssmhb"/>
      <lastmod>2026-11-01T21:37:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-and-cone-volume-comparison/sssssmhb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-and-cone-volume-comparison/sssssmhb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-and-cone-volume-comparison/sssssmhb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-and-cone-volume-comparison/sssssmhb"/>
      <lastmod>2026-11-01T21:37:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sum-of-integers/sssssmh3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-integers/sssssmh3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-integers/sssssmh3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-integers/sssssmh3"/>
      <lastmod>2026-11-02T15:30:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sum-of-integers/sssssmh3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-integers/sssssmh3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-integers/sssssmh3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-integers/sssssmh3"/>
      <lastmod>2026-11-02T15:30:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/point-dilation-demo/sssssmhq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-dilation-demo/sssssmhq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-dilation-demo/sssssmhq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-dilation-demo/sssssmhq"/>
      <lastmod>2026-11-02T18:14:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/point-dilation-demo/sssssmhq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-dilation-demo/sssssmhq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-dilation-demo/sssssmhq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-dilation-demo/sssssmhq"/>
      <lastmod>2026-11-02T18:14:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surfaces-and-symmetry-prisms-trigonometric-functions-and-secant-lines/sssssmh1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surfaces-and-symmetry-prisms-trigonometric-functions-and-secant-lines/sssssmh1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surfaces-and-symmetry-prisms-trigonometric-functions-and-secant-lines/sssssmh1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surfaces-and-symmetry-prisms-trigonometric-functions-and-secant-lines/sssssmh1"/>
      <lastmod>2026-11-01T21:20:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surfaces-and-symmetry-prisms-trigonometric-functions-and-secant-lines/sssssmh1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surfaces-and-symmetry-prisms-trigonometric-functions-and-secant-lines/sssssmh1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surfaces-and-symmetry-prisms-trigonometric-functions-and-secant-lines/sssssmh1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surfaces-and-symmetry-prisms-trigonometric-functions-and-secant-lines/sssssmh1"/>
      <lastmod>2026-11-01T21:20:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/data-collection-for-pendulum-length-vs-swing-time/sssssmhm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/data-collection-for-pendulum-length-vs-swing-time/sssssmhm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/data-collection-for-pendulum-length-vs-swing-time/sssssmhm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/data-collection-for-pendulum-length-vs-swing-time/sssssmhm"/>
      <lastmod>2026-11-01T22:06:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/data-collection-for-pendulum-length-vs-swing-time/sssssmhm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/data-collection-for-pendulum-length-vs-swing-time/sssssmhm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/data-collection-for-pendulum-length-vs-swing-time/sssssmhm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/data-collection-for-pendulum-length-vs-swing-time/sssssmhm"/>
      <lastmod>2026-11-01T22:06:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hidden-surface-area/sssssmhj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hidden-surface-area/sssssmhj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hidden-surface-area/sssssmhj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hidden-surface-area/sssssmhj"/>
      <lastmod>2026-11-01T21:34:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hidden-surface-area/sssssmhj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hidden-surface-area/sssssmhj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hidden-surface-area/sssssmhj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hidden-surface-area/sssssmhj"/>
      <lastmod>2026-11-01T21:34:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-combination-by-fanie-lychouna/sssssmhp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-combination-by-fanie-lychouna/sssssmhp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-combination-by-fanie-lychouna/sssssmhp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-combination-by-fanie-lychouna/sssssmhp"/>
      <lastmod>2026-11-01T19:35:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-combination-by-fanie-lychouna/sssssmhp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-combination-by-fanie-lychouna/sssssmhp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-combination-by-fanie-lychouna/sssssmhp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-combination-by-fanie-lychouna/sssssmhp"/>
      <lastmod>2026-11-01T19:35:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graph-of-first-derivative/sssssmhw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-of-first-derivative/sssssmhw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-of-first-derivative/sssssmhw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-of-first-derivative/sssssmhw"/>
      <lastmod>2026-11-01T23:43:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graph-of-first-derivative/sssssmhw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-of-first-derivative/sssssmhw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-of-first-derivative/sssssmhw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-of-first-derivative/sssssmhw"/>
      <lastmod>2026-11-01T23:43:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelograms-exploration-student-centered-investigations-parts-1-4/sssssmh6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelograms-exploration-student-centered-investigations-parts-1-4/sssssmh6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelograms-exploration-student-centered-investigations-parts-1-4/sssssmh6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelograms-exploration-student-centered-investigations-parts-1-4/sssssmh6"/>
      <lastmod>2026-11-02T02:51:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelograms-exploration-student-centered-investigations-parts-1-4/sssssmh6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelograms-exploration-student-centered-investigations-parts-1-4/sssssmh6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelograms-exploration-student-centered-investigations-parts-1-4/sssssmh6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelograms-exploration-student-centered-investigations-parts-1-4/sssssmh6"/>
      <lastmod>2026-11-02T02:51:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-of-even-and-odd-functions/sssssmhg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-of-even-and-odd-functions/sssssmhg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-of-even-and-odd-functions/sssssmhg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-of-even-and-odd-functions/sssssmhg"/>
      <lastmod>2026-11-01T23:15:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-of-even-and-odd-functions/sssssmhg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-of-even-and-odd-functions/sssssmhg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-of-even-and-odd-functions/sssssmhg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-of-even-and-odd-functions/sssssmhg"/>
      <lastmod>2026-11-01T23:15:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-and-tangent-slope/sssssmh9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-and-tangent-slope/sssssmh9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-and-tangent-slope/sssssmh9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-and-tangent-slope/sssssmh9"/>
      <lastmod>2026-11-02T03:08:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-and-tangent-slope/sssssmh9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-and-tangent-slope/sssssmh9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-and-tangent-slope/sssssmh9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-and-tangent-slope/sssssmh9"/>
      <lastmod>2026-11-02T03:08:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-graphing-and-statistical-analysis/sssssmhe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-graphing-and-statistical-analysis/sssssmhe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-graphing-and-statistical-analysis/sssssmhe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-graphing-and-statistical-analysis/sssssmhe"/>
      <lastmod>2026-11-01T19:26:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-graphing-and-statistical-analysis/sssssmhe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-graphing-and-statistical-analysis/sssssmhe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-graphing-and-statistical-analysis/sssssmhe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-graphing-and-statistical-analysis/sssssmhe"/>
      <lastmod>2026-11-01T19:26:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/understanding-derivatives-through-secant-lines/sssssmhv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/understanding-derivatives-through-secant-lines/sssssmhv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/understanding-derivatives-through-secant-lines/sssssmhv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/understanding-derivatives-through-secant-lines/sssssmhv"/>
      <lastmod>2026-11-02T18:45:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/understanding-derivatives-through-secant-lines/sssssmhv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/understanding-derivatives-through-secant-lines/sssssmhv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/understanding-derivatives-through-secant-lines/sssssmhv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/understanding-derivatives-through-secant-lines/sssssmhv"/>
      <lastmod>2026-11-02T18:45:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inscribed-circumscribed-polygons/sssssmh4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inscribed-circumscribed-polygons/sssssmh4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inscribed-circumscribed-polygons/sssssmh4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inscribed-circumscribed-polygons/sssssmh4"/>
      <lastmod>2026-11-02T13:28:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inscribed-circumscribed-polygons/sssssmh4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inscribed-circumscribed-polygons/sssssmh4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inscribed-circumscribed-polygons/sssssmh4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inscribed-circumscribed-polygons/sssssmh4"/>
      <lastmod>2026-11-02T13:28:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translating-a-cube-using-vectors-advanced/sssssmhl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translating-a-cube-using-vectors-advanced/sssssmhl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translating-a-cube-using-vectors-advanced/sssssmhl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translating-a-cube-using-vectors-advanced/sssssmhl"/>
      <lastmod>2026-11-02T17:56:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translating-a-cube-using-vectors-advanced/sssssmhl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translating-a-cube-using-vectors-advanced/sssssmhl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translating-a-cube-using-vectors-advanced/sssssmhl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translating-a-cube-using-vectors-advanced/sssssmhl"/>
      <lastmod>2026-11-02T17:56:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/basic-derivatives-as-slopes-at-a-point/sssssmhy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-derivatives-as-slopes-at-a-point/sssssmhy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-derivatives-as-slopes-at-a-point/sssssmhy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-derivatives-as-slopes-at-a-point/sssssmhy"/>
      <lastmod>2026-11-02T13:35:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/basic-derivatives-as-slopes-at-a-point/sssssmhy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-derivatives-as-slopes-at-a-point/sssssmhy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-derivatives-as-slopes-at-a-point/sssssmhy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-derivatives-as-slopes-at-a-point/sssssmhy"/>
      <lastmod>2026-11-02T13:35:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-by-mr-geary/sssssmha</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-by-mr-geary/sssssmha"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-by-mr-geary/sssssmha"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-by-mr-geary/sssssmha"/>
      <lastmod>2026-11-02T18:19:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-by-mr-geary/sssssmha</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-by-mr-geary/sssssmha"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-by-mr-geary/sssssmha"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-by-mr-geary/sssssmha"/>
      <lastmod>2026-11-02T18:19:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prism-net-example/sssssmhc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-net-example/sssssmhc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-net-example/sssssmhc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-net-example/sssssmhc"/>
      <lastmod>2026-11-02T18:59:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prism-net-example/sssssmhc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-net-example/sssssmhc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-net-example/sssssmhc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-net-example/sssssmhc"/>
      <lastmod>2026-11-02T18:59:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-net/sssssmhr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-net/sssssmhr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-net/sssssmhr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-net/sssssmhr"/>
      <lastmod>2026-11-01T19:34:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-net/sssssmhr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-net/sssssmhr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-net/sssssmhr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-net/sssssmhr"/>
      <lastmod>2026-11-01T19:34:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/an-area-of-12-small-drawing-grid/sssssmhh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/an-area-of-12-small-drawing-grid/sssssmhh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/an-area-of-12-small-drawing-grid/sssssmhh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/an-area-of-12-small-drawing-grid/sssssmhh"/>
      <lastmod>2026-11-02T16:38:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/an-area-of-12-small-drawing-grid/sssssmhh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/an-area-of-12-small-drawing-grid/sssssmhh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/an-area-of-12-small-drawing-grid/sssssmhh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/an-area-of-12-small-drawing-grid/sssssmhh"/>
      <lastmod>2026-11-02T16:38:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-of-light-on-a-parabola/sssssmht</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-of-light-on-a-parabola/sssssmht"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-of-light-on-a-parabola/sssssmht"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-of-light-on-a-parabola/sssssmht"/>
      <lastmod>2026-11-02T16:36:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-of-light-on-a-parabola/sssssmht</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-of-light-on-a-parabola/sssssmht"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-of-light-on-a-parabola/sssssmht"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-of-light-on-a-parabola/sssssmht"/>
      <lastmod>2026-11-02T16:36:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/recognize-the-shapes-of-these-objects/sssssmhx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/recognize-the-shapes-of-these-objects/sssssmhx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/recognize-the-shapes-of-these-objects/sssssmhx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/recognize-the-shapes-of-these-objects/sssssmhx"/>
      <lastmod>2026-11-02T12:33:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/recognize-the-shapes-of-these-objects/sssssmhx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/recognize-the-shapes-of-these-objects/sssssmhx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/recognize-the-shapes-of-these-objects/sssssmhx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/recognize-the-shapes-of-these-objects/sssssmhx"/>
      <lastmod>2026-11-02T12:33:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-volume-calculation-demo/sssssmhi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-volume-calculation-demo/sssssmhi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-volume-calculation-demo/sssssmhi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-volume-calculation-demo/sssssmhi"/>
      <lastmod>2026-11-02T16:34:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-volume-calculation-demo/sssssmhi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-volume-calculation-demo/sssssmhi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-volume-calculation-demo/sssssmhi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-volume-calculation-demo/sssssmhi"/>
      <lastmod>2026-11-02T16:34:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/m-bius-transformations-interactive-demo/sssssmho</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/m-bius-transformations-interactive-demo/sssssmho"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/m-bius-transformations-interactive-demo/sssssmho"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/m-bius-transformations-interactive-demo/sssssmho"/>
      <lastmod>2026-11-01T21:41:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/m-bius-transformations-interactive-demo/sssssmho</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/m-bius-transformations-interactive-demo/sssssmho"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/m-bius-transformations-interactive-demo/sssssmho"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/m-bius-transformations-interactive-demo/sssssmho"/>
      <lastmod>2026-11-01T21:41:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallels-perpendiculars-ex-7/sssssmts</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallels-perpendiculars-ex-7/sssssmts"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallels-perpendiculars-ex-7/sssssmts"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallels-perpendiculars-ex-7/sssssmts"/>
      <lastmod>2026-11-02T09:41:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallels-perpendiculars-ex-7/sssssmts</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallels-perpendiculars-ex-7/sssssmts"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallels-perpendiculars-ex-7/sssssmts"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallels-perpendiculars-ex-7/sssssmts"/>
      <lastmod>2026-11-02T09:41:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quiz-on-increasing-decreasing-parabola/sssssmt7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-on-increasing-decreasing-parabola/sssssmt7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-on-increasing-decreasing-parabola/sssssmt7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-on-increasing-decreasing-parabola/sssssmt7"/>
      <lastmod>2026-11-01T23:34:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quiz-on-increasing-decreasing-parabola/sssssmt7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-on-increasing-decreasing-parabola/sssssmt7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-on-increasing-decreasing-parabola/sssssmt7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-on-increasing-decreasing-parabola/sssssmt7"/>
      <lastmod>2026-11-01T23:34:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reasoning-about-equations-and-tape-diagrams-part-2/sssssmtn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reasoning-about-equations-and-tape-diagrams-part-2/sssssmtn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reasoning-about-equations-and-tape-diagrams-part-2/sssssmtn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reasoning-about-equations-and-tape-diagrams-part-2/sssssmtn"/>
      <lastmod>2026-11-02T10:36:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reasoning-about-equations-and-tape-diagrams-part-2/sssssmtn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reasoning-about-equations-and-tape-diagrams-part-2/sssssmtn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reasoning-about-equations-and-tape-diagrams-part-2/sssssmtn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reasoning-about-equations-and-tape-diagrams-part-2/sssssmtn"/>
      <lastmod>2026-11-02T10:36:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/craters/sssssmt2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/craters/sssssmt2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/craters/sssssmt2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/craters/sssssmt2"/>
      <lastmod>2026-11-02T18:59:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/craters/sssssmt2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/craters/sssssmt2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/craters/sssssmt2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/craters/sssssmt2"/>
      <lastmod>2026-11-02T18:59:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-200-random-samples-to-normal-distribution/sssssmtk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-200-random-samples-to-normal-distribution/sssssmtk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-200-random-samples-to-normal-distribution/sssssmtk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-200-random-samples-to-normal-distribution/sssssmtk"/>
      <lastmod>2026-11-02T16:51:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-200-random-samples-to-normal-distribution/sssssmtk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-200-random-samples-to-normal-distribution/sssssmtk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-200-random-samples-to-normal-distribution/sssssmtk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-200-random-samples-to-normal-distribution/sssssmtk"/>
      <lastmod>2026-11-02T16:51:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circumcenter-centroid-orthocenter/sssssmtz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumcenter-centroid-orthocenter/sssssmtz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumcenter-centroid-orthocenter/sssssmtz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumcenter-centroid-orthocenter/sssssmtz"/>
      <lastmod>2026-11-01T21:12:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circumcenter-centroid-orthocenter/sssssmtz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumcenter-centroid-orthocenter/sssssmtz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumcenter-centroid-orthocenter/sssssmtz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumcenter-centroid-orthocenter/sssssmtz"/>
      <lastmod>2026-11-01T21:12:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-line-reflections/sssssmt0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-line-reflections/sssssmt0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-line-reflections/sssssmt0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-line-reflections/sssssmt0"/>
      <lastmod>2026-11-01T21:46:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-line-reflections/sssssmt0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-line-reflections/sssssmt0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-line-reflections/sssssmt0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-line-reflections/sssssmt0"/>
      <lastmod>2026-11-01T21:46:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pp-dissection-method-demonstration/sssssmtd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pp-dissection-method-demonstration/sssssmtd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pp-dissection-method-demonstration/sssssmtd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pp-dissection-method-demonstration/sssssmtd"/>
      <lastmod>2026-11-02T02:34:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pp-dissection-method-demonstration/sssssmtd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pp-dissection-method-demonstration/sssssmtd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pp-dissection-method-demonstration/sssssmtd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pp-dissection-method-demonstration/sssssmtd"/>
      <lastmod>2026-11-02T02:34:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/matrix-multiplication-demo-by-walerij-koschkin/sssssmtf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-multiplication-demo-by-walerij-koschkin/sssssmtf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-multiplication-demo-by-walerij-koschkin/sssssmtf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-multiplication-demo-by-walerij-koschkin/sssssmtf"/>
      <lastmod>2026-11-02T18:45:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/matrix-multiplication-demo-by-walerij-koschkin/sssssmtf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-multiplication-demo-by-walerij-koschkin/sssssmtf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-multiplication-demo-by-walerij-koschkin/sssssmtf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-multiplication-demo-by-walerij-koschkin/sssssmtf"/>
      <lastmod>2026-11-02T18:45:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-demonstration-by-duane-habecker/sssssmt8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-demonstration-by-duane-habecker/sssssmt8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-demonstration-by-duane-habecker/sssssmt8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-demonstration-by-duane-habecker/sssssmt8"/>
      <lastmod>2026-11-02T03:01:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-demonstration-by-duane-habecker/sssssmt8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-demonstration-by-duane-habecker/sssssmt8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-demonstration-by-duane-habecker/sssssmt8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-demonstration-by-duane-habecker/sssssmt8"/>
      <lastmod>2026-11-02T03:01:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-geogebra/sssssmtu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-geogebra/sssssmtu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-geogebra/sssssmtu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-geogebra/sssssmtu"/>
      <lastmod>2026-11-02T09:15:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-geogebra/sssssmtu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-geogebra/sssssmtu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-geogebra/sssssmtu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-geogebra/sssssmtu"/>
      <lastmod>2026-11-02T09:15:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-angle-side-triangle-construction-discovery/sssssmt5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-angle-side-triangle-construction-discovery/sssssmt5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-angle-side-triangle-construction-discovery/sssssmt5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-angle-side-triangle-construction-discovery/sssssmt5"/>
      <lastmod>2026-11-02T16:47:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-angle-side-triangle-construction-discovery/sssssmt5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-angle-side-triangle-construction-discovery/sssssmt5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-angle-side-triangle-construction-discovery/sssssmt5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-angle-side-triangle-construction-discovery/sssssmt5"/>
      <lastmod>2026-11-02T16:47:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/determine-the-center-and-angle-of-rotation/sssssmtb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/determine-the-center-and-angle-of-rotation/sssssmtb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/determine-the-center-and-angle-of-rotation/sssssmtb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/determine-the-center-and-angle-of-rotation/sssssmtb"/>
      <lastmod>2026-11-02T17:35:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/determine-the-center-and-angle-of-rotation/sssssmtb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/determine-the-center-and-angle-of-rotation/sssssmtb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/determine-the-center-and-angle-of-rotation/sssssmtb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/determine-the-center-and-angle-of-rotation/sssssmtb"/>
      <lastmod>2026-11-02T17:35:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-the-area-of-an-annulus/sssssmt3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-area-of-an-annulus/sssssmt3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-area-of-an-annulus/sssssmt3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-area-of-an-annulus/sssssmt3"/>
      <lastmod>2026-11-02T02:18:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-the-area-of-an-annulus/sssssmt3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-area-of-an-annulus/sssssmt3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-area-of-an-annulus/sssssmt3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-area-of-an-annulus/sssssmt3"/>
      <lastmod>2026-11-02T02:18:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pentagonal-prism-construction/sssssmtq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pentagonal-prism-construction/sssssmtq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pentagonal-prism-construction/sssssmtq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pentagonal-prism-construction/sssssmtq"/>
      <lastmod>2026-11-02T16:41:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pentagonal-prism-construction/sssssmtq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pentagonal-prism-construction/sssssmtq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pentagonal-prism-construction/sssssmtq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pentagonal-prism-construction/sssssmtq"/>
      <lastmod>2026-11-02T16:41:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/special-properties-of-a-rhombus/sssssmt1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-properties-of-a-rhombus/sssssmt1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-properties-of-a-rhombus/sssssmt1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-properties-of-a-rhombus/sssssmt1"/>
      <lastmod>2026-11-01T19:29:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/special-properties-of-a-rhombus/sssssmt1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-properties-of-a-rhombus/sssssmt1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-properties-of-a-rhombus/sssssmt1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-properties-of-a-rhombus/sssssmt1"/>
      <lastmod>2026-11-01T19:29:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-revolution-between-two-curves/sssssmtm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-between-two-curves/sssssmtm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-between-two-curves/sssssmtm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-between-two-curves/sssssmtm"/>
      <lastmod>2026-11-02T17:51:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-revolution-between-two-curves/sssssmtm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-between-two-curves/sssssmtm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-between-two-curves/sssssmtm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-between-two-curves/sssssmtm"/>
      <lastmod>2026-11-02T17:51:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/q2b/sssssmtj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/q2b/sssssmtj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/q2b/sssssmtj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/q2b/sssssmtj"/>
      <lastmod>2026-11-02T11:04:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/q2b/sssssmtj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/q2b/sssssmtj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/q2b/sssssmtj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/q2b/sssssmtj"/>
      <lastmod>2026-11-02T11:04:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygon-construction-and-properties-demo/sssssmtp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-construction-and-properties-demo/sssssmtp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-construction-and-properties-demo/sssssmtp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-construction-and-properties-demo/sssssmtp"/>
      <lastmod>2026-11-01T23:43:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygon-construction-and-properties-demo/sssssmtp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-construction-and-properties-demo/sssssmtp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-construction-and-properties-demo/sssssmtp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-construction-and-properties-demo/sssssmtp"/>
      <lastmod>2026-11-01T23:43:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-polygons-with-different-sides/sssssmtw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-polygons-with-different-sides/sssssmtw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-polygons-with-different-sides/sssssmtw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-polygons-with-different-sides/sssssmtw"/>
      <lastmod>2026-11-02T18:49:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-polygons-with-different-sides/sssssmtw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-polygons-with-different-sides/sssssmtw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-polygons-with-different-sides/sssssmtw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-polygons-with-different-sides/sssssmtw"/>
      <lastmod>2026-11-02T18:49:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hexagonal-pyramid/sssssmt6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagonal-pyramid/sssssmt6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagonal-pyramid/sssssmt6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagonal-pyramid/sssssmt6"/>
      <lastmod>2026-11-02T16:56:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hexagonal-pyramid/sssssmt6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagonal-pyramid/sssssmt6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagonal-pyramid/sssssmt6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagonal-pyramid/sssssmt6"/>
      <lastmod>2026-11-02T16:56:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/histogram-bin-width-demonstration/sssssmtg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-bin-width-demonstration/sssssmtg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-bin-width-demonstration/sssssmtg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-bin-width-demonstration/sssssmtg"/>
      <lastmod>2026-11-02T03:17:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/histogram-bin-width-demonstration/sssssmtg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-bin-width-demonstration/sssssmtg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-bin-width-demonstration/sssssmtg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-bin-width-demonstration/sssssmtg"/>
      <lastmod>2026-11-02T03:17:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-ratios-demonstration/sssssmt9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-ratios-demonstration/sssssmt9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-ratios-demonstration/sssssmt9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-ratios-demonstration/sssssmt9"/>
      <lastmod>2026-11-02T09:08:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-ratios-demonstration/sssssmt9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-ratios-demonstration/sssssmt9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-ratios-demonstration/sssssmt9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-ratios-demonstration/sssssmt9"/>
      <lastmod>2026-11-02T09:08:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translations-sliding-trapezoids/sssssmte</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translations-sliding-trapezoids/sssssmte"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translations-sliding-trapezoids/sssssmte"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translations-sliding-trapezoids/sssssmte"/>
      <lastmod>2026-11-02T15:50:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translations-sliding-trapezoids/sssssmte</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translations-sliding-trapezoids/sssssmte"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translations-sliding-trapezoids/sssssmte"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translations-sliding-trapezoids/sssssmte"/>
      <lastmod>2026-11-02T15:50:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-angle-relationships/sssssmtv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-angle-relationships/sssssmtv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-angle-relationships/sssssmtv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-angle-relationships/sssssmtv"/>
      <lastmod>2026-11-02T15:42:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-angle-relationships/sssssmtv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-angle-relationships/sssssmtv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-angle-relationships/sssssmtv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-angle-relationships/sssssmtv"/>
      <lastmod>2026-11-02T15:42:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-numbers-add-and-subtract/sssssmt4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-numbers-add-and-subtract/sssssmt4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-numbers-add-and-subtract/sssssmt4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-numbers-add-and-subtract/sssssmt4"/>
      <lastmod>2026-11-02T02:46:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-numbers-add-and-subtract/sssssmt4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-numbers-add-and-subtract/sssssmt4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-numbers-add-and-subtract/sssssmt4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-numbers-add-and-subtract/sssssmt4"/>
      <lastmod>2026-11-02T02:46:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slopes-of-parallel-perpendicular-lines/sssssmtl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slopes-of-parallel-perpendicular-lines/sssssmtl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slopes-of-parallel-perpendicular-lines/sssssmtl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slopes-of-parallel-perpendicular-lines/sssssmtl"/>
      <lastmod>2026-11-02T16:32:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slopes-of-parallel-perpendicular-lines/sssssmtl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slopes-of-parallel-perpendicular-lines/sssssmtl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slopes-of-parallel-perpendicular-lines/sssssmtl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slopes-of-parallel-perpendicular-lines/sssssmtl"/>
      <lastmod>2026-11-02T16:32:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definite-integral-illustrator-i-by-noor88m99/sssssmty</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-illustrator-i-by-noor88m99/sssssmty"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-illustrator-i-by-noor88m99/sssssmty"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-illustrator-i-by-noor88m99/sssssmty"/>
      <lastmod>2026-11-01T19:36:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definite-integral-illustrator-i-by-noor88m99/sssssmty</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-illustrator-i-by-noor88m99/sssssmty"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-illustrator-i-by-noor88m99/sssssmty"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-illustrator-i-by-noor88m99/sssssmty"/>
      <lastmod>2026-11-01T19:36:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-the-connectivity-matrix-of-a-cube/sssssmta</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-connectivity-matrix-of-a-cube/sssssmta"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-connectivity-matrix-of-a-cube/sssssmta"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-connectivity-matrix-of-a-cube/sssssmta"/>
      <lastmod>2026-11-02T18:46:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-the-connectivity-matrix-of-a-cube/sssssmta</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-connectivity-matrix-of-a-cube/sssssmta"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-connectivity-matrix-of-a-cube/sssssmta"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-connectivity-matrix-of-a-cube/sssssmta"/>
      <lastmod>2026-11-02T18:46:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/deriving-the-law-of-sines/sssssmtc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/deriving-the-law-of-sines/sssssmtc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/deriving-the-law-of-sines/sssssmtc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/deriving-the-law-of-sines/sssssmtc"/>
      <lastmod>2026-11-01T19:07:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/deriving-the-law-of-sines/sssssmtc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/deriving-the-law-of-sines/sssssmtc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/deriving-the-law-of-sines/sssssmtc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/deriving-the-law-of-sines/sssssmtc"/>
      <lastmod>2026-11-01T19:07:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simplifying-fractions-by-the-central-maths-hub/sssssmtr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simplifying-fractions-by-the-central-maths-hub/sssssmtr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simplifying-fractions-by-the-central-maths-hub/sssssmtr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simplifying-fractions-by-the-central-maths-hub/sssssmtr"/>
      <lastmod>2026-11-02T17:07:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simplifying-fractions-by-the-central-maths-hub/sssssmtr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simplifying-fractions-by-the-central-maths-hub/sssssmtr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simplifying-fractions-by-the-central-maths-hub/sssssmtr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simplifying-fractions-by-the-central-maths-hub/sssssmtr"/>
      <lastmod>2026-11-02T17:07:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fedex-logo-geometric-construction/sssssmth</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fedex-logo-geometric-construction/sssssmth"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fedex-logo-geometric-construction/sssssmth"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fedex-logo-geometric-construction/sssssmth"/>
      <lastmod>2026-11-02T18:25:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fedex-logo-geometric-construction/sssssmth</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fedex-logo-geometric-construction/sssssmth"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fedex-logo-geometric-construction/sssssmth"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fedex-logo-geometric-construction/sssssmth"/>
      <lastmod>2026-11-02T18:25:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/correlation-and-sine-function/sssssmtt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/correlation-and-sine-function/sssssmtt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/correlation-and-sine-function/sssssmtt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/correlation-and-sine-function/sssssmtt"/>
      <lastmod>2026-11-02T13:16:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/correlation-and-sine-function/sssssmtt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/correlation-and-sine-function/sssssmtt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/correlation-and-sine-function/sssssmtt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/correlation-and-sine-function/sssssmtt"/>
      <lastmod>2026-11-02T13:16:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/humber-circuit-board-project-area-optimization-and-random-variables/sssssmtx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/humber-circuit-board-project-area-optimization-and-random-variables/sssssmtx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/humber-circuit-board-project-area-optimization-and-random-variables/sssssmtx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/humber-circuit-board-project-area-optimization-and-random-variables/sssssmtx"/>
      <lastmod>2026-11-01T19:13:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/humber-circuit-board-project-area-optimization-and-random-variables/sssssmtx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/humber-circuit-board-project-area-optimization-and-random-variables/sssssmtx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/humber-circuit-board-project-area-optimization-and-random-variables/sssssmtx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/humber-circuit-board-project-area-optimization-and-random-variables/sssssmtx"/>
      <lastmod>2026-11-01T19:13:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/standard-deviation-comparison/sssssmti</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-deviation-comparison/sssssmti"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-deviation-comparison/sssssmti"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-deviation-comparison/sssssmti"/>
      <lastmod>2026-11-01T21:32:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/standard-deviation-comparison/sssssmti</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-deviation-comparison/sssssmti"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-deviation-comparison/sssssmti"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-deviation-comparison/sssssmti"/>
      <lastmod>2026-11-01T21:32:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/property-of-similar-triangles/sssssmto</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/property-of-similar-triangles/sssssmto"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/property-of-similar-triangles/sssssmto"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/property-of-similar-triangles/sssssmto"/>
      <lastmod>2026-11-02T17:44:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/property-of-similar-triangles/sssssmto</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/property-of-similar-triangles/sssssmto"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/property-of-similar-triangles/sssssmto"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/property-of-similar-triangles/sssssmto"/>
      <lastmod>2026-11-02T17:44:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/writing-decimals-as-percentages/sssssmxs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/writing-decimals-as-percentages/sssssmxs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/writing-decimals-as-percentages/sssssmxs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/writing-decimals-as-percentages/sssssmxs"/>
      <lastmod>2026-11-02T09:11:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/writing-decimals-as-percentages/sssssmxs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/writing-decimals-as-percentages/sssssmxs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/writing-decimals-as-percentages/sssssmxs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/writing-decimals-as-percentages/sssssmxs"/>
      <lastmod>2026-11-02T09:11:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equal-and-perpendicular-tangents/sssssmx7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equal-and-perpendicular-tangents/sssssmx7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equal-and-perpendicular-tangents/sssssmx7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equal-and-perpendicular-tangents/sssssmx7"/>
      <lastmod>2026-11-01T23:47:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equal-and-perpendicular-tangents/sssssmx7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equal-and-perpendicular-tangents/sssssmx7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equal-and-perpendicular-tangents/sssssmx7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equal-and-perpendicular-tangents/sssssmx7"/>
      <lastmod>2026-11-01T23:47:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simplex-algorithm-implementation/sssssmxn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simplex-algorithm-implementation/sssssmxn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simplex-algorithm-implementation/sssssmxn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simplex-algorithm-implementation/sssssmxn"/>
      <lastmod>2026-11-02T17:44:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simplex-algorithm-implementation/sssssmxn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simplex-algorithm-implementation/sssssmxn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simplex-algorithm-implementation/sssssmxn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simplex-algorithm-implementation/sssssmxn"/>
      <lastmod>2026-11-02T17:44:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-demonstration-by-sokha-mon/sssssmx2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-demonstration-by-sokha-mon/sssssmx2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-demonstration-by-sokha-mon/sssssmx2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-demonstration-by-sokha-mon/sssssmx2"/>
      <lastmod>2026-11-02T16:44:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-demonstration-by-sokha-mon/sssssmx2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-demonstration-by-sokha-mon/sssssmx2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-demonstration-by-sokha-mon/sssssmx2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-demonstration-by-sokha-mon/sssssmx2"/>
      <lastmod>2026-11-02T16:44:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallel-lines-in-the-coordinate-plane/sssssmxk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-lines-in-the-coordinate-plane/sssssmxk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-lines-in-the-coordinate-plane/sssssmxk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-lines-in-the-coordinate-plane/sssssmxk"/>
      <lastmod>2026-11-02T17:55:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallel-lines-in-the-coordinate-plane/sssssmxk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-lines-in-the-coordinate-plane/sssssmxk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-lines-in-the-coordinate-plane/sssssmxk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-lines-in-the-coordinate-plane/sssssmxk"/>
      <lastmod>2026-11-02T17:55:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/compare-polar-and-rectangular-coordinates/sssssmxz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-polar-and-rectangular-coordinates/sssssmxz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-polar-and-rectangular-coordinates/sssssmxz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-polar-and-rectangular-coordinates/sssssmxz"/>
      <lastmod>2026-11-01T23:13:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/compare-polar-and-rectangular-coordinates/sssssmxz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-polar-and-rectangular-coordinates/sssssmxz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-polar-and-rectangular-coordinates/sssssmxz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-polar-and-rectangular-coordinates/sssssmxz"/>
      <lastmod>2026-11-01T23:13:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kaleidoscope-with-dn-symmetry/sssssmx0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kaleidoscope-with-dn-symmetry/sssssmx0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kaleidoscope-with-dn-symmetry/sssssmx0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kaleidoscope-with-dn-symmetry/sssssmx0"/>
      <lastmod>2026-11-02T17:49:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kaleidoscope-with-dn-symmetry/sssssmx0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kaleidoscope-with-dn-symmetry/sssssmx0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kaleidoscope-with-dn-symmetry/sssssmx0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kaleidoscope-with-dn-symmetry/sssssmx0"/>
      <lastmod>2026-11-02T17:49:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hexagon-dimensions/sssssmxd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagon-dimensions/sssssmxd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagon-dimensions/sssssmxd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagon-dimensions/sssssmxd"/>
      <lastmod>2026-11-02T16:44:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hexagon-dimensions/sssssmxd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagon-dimensions/sssssmxd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagon-dimensions/sssssmxd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagon-dimensions/sssssmxd"/>
      <lastmod>2026-11-02T16:44:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-equations/sssssmxf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-equations/sssssmxf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-equations/sssssmxf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-equations/sssssmxf"/>
      <lastmod>2026-11-02T18:28:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-equations/sssssmxf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-equations/sssssmxf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-equations/sssssmxf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-equations/sssssmxf"/>
      <lastmod>2026-11-02T18:28:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/venn-diagram-logic-visualizing-two-set-operations/sssssmx8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-logic-visualizing-two-set-operations/sssssmx8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-logic-visualizing-two-set-operations/sssssmx8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-logic-visualizing-two-set-operations/sssssmx8"/>
      <lastmod>2026-11-01T19:04:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/venn-diagram-logic-visualizing-two-set-operations/sssssmx8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-logic-visualizing-two-set-operations/sssssmx8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-logic-visualizing-two-set-operations/sssssmx8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-logic-visualizing-two-set-operations/sssssmx8"/>
      <lastmod>2026-11-01T19:04:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/directional-derivatives-and-tangent-plane-by-justin-almeida/sssssmxu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directional-derivatives-and-tangent-plane-by-justin-almeida/sssssmxu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directional-derivatives-and-tangent-plane-by-justin-almeida/sssssmxu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directional-derivatives-and-tangent-plane-by-justin-almeida/sssssmxu"/>
      <lastmod>2026-11-01T20:44:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/directional-derivatives-and-tangent-plane-by-justin-almeida/sssssmxu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directional-derivatives-and-tangent-plane-by-justin-almeida/sssssmxu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directional-derivatives-and-tangent-plane-by-justin-almeida/sssssmxu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directional-derivatives-and-tangent-plane-by-justin-almeida/sssssmxu"/>
      <lastmod>2026-11-01T20:44:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/discovering-the-properties-of-a-kite/sssssmx5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discovering-the-properties-of-a-kite/sssssmx5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discovering-the-properties-of-a-kite/sssssmx5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discovering-the-properties-of-a-kite/sssssmx5"/>
      <lastmod>2026-11-02T18:43:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/discovering-the-properties-of-a-kite/sssssmx5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discovering-the-properties-of-a-kite/sssssmx5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discovering-the-properties-of-a-kite/sssssmx5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discovering-the-properties-of-a-kite/sssssmx5"/>
      <lastmod>2026-11-02T18:43:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-triangles-in-an-equilateral-triangle/sssssmxb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangles-in-an-equilateral-triangle/sssssmxb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangles-in-an-equilateral-triangle/sssssmxb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangles-in-an-equilateral-triangle/sssssmxb"/>
      <lastmod>2026-11-02T10:50:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-triangles-in-an-equilateral-triangle/sssssmxb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangles-in-an-equilateral-triangle/sssssmxb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangles-in-an-equilateral-triangle/sssssmxb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangles-in-an-equilateral-triangle/sssssmxb"/>
      <lastmod>2026-11-02T10:50:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-square-properties-in-parallelograms/sssssmx3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-square-properties-in-parallelograms/sssssmx3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-square-properties-in-parallelograms/sssssmx3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-square-properties-in-parallelograms/sssssmx3"/>
      <lastmod>2026-11-02T00:15:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-square-properties-in-parallelograms/sssssmx3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-square-properties-in-parallelograms/sssssmx3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-square-properties-in-parallelograms/sssssmx3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-square-properties-in-parallelograms/sssssmx3"/>
      <lastmod>2026-11-02T00:15:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cross-sections-of-a-cube-by-nandrews/sssssmxq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-cube-by-nandrews/sssssmxq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-sections-of-a-cube-by-nandrews/sssssmxq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-cube-by-nandrews/sssssmxq"/>
      <lastmod>2026-11-02T15:54:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cross-sections-of-a-cube-by-nandrews/sssssmxq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-cube-by-nandrews/sssssmxq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-sections-of-a-cube-by-nandrews/sssssmxq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-cube-by-nandrews/sssssmxq"/>
      <lastmod>2026-11-02T15:54:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-conic-sections/sssssmx1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-conic-sections/sssssmx1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-conic-sections/sssssmx1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-conic-sections/sssssmx1"/>
      <lastmod>2026-11-01T23:27:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-conic-sections/sssssmx1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-conic-sections/sssssmx1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-conic-sections/sssssmx1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-conic-sections/sssssmx1"/>
      <lastmod>2026-11-01T23:27:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-perimeter-problem/sssssmxm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-perimeter-problem/sssssmxm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-perimeter-problem/sssssmxm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-perimeter-problem/sssssmxm"/>
      <lastmod>2026-11-02T18:30:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-perimeter-problem/sssssmxm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-perimeter-problem/sssssmxm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-perimeter-problem/sssssmxm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-perimeter-problem/sssssmxm"/>
      <lastmod>2026-11-02T18:30:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-proof-with-diagram/sssssmxj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-proof-with-diagram/sssssmxj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-proof-with-diagram/sssssmxj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-proof-with-diagram/sssssmxj"/>
      <lastmod>2026-11-01T20:51:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-proof-with-diagram/sssssmxj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-proof-with-diagram/sssssmxj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-proof-with-diagram/sssssmxj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-proof-with-diagram/sssssmxj"/>
      <lastmod>2026-11-01T20:51:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/smallest-n-for-m-n-to-be-a-perfect-square/sssssmxp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/smallest-n-for-m-n-to-be-a-perfect-square/sssssmxp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/smallest-n-for-m-n-to-be-a-perfect-square/sssssmxp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/smallest-n-for-m-n-to-be-a-perfect-square/sssssmxp"/>
      <lastmod>2026-11-02T16:30:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/smallest-n-for-m-n-to-be-a-perfect-square/sssssmxp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/smallest-n-for-m-n-to-be-a-perfect-square/sssssmxp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/smallest-n-for-m-n-to-be-a-perfect-square/sssssmxp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/smallest-n-for-m-n-to-be-a-perfect-square/sssssmxp"/>
      <lastmod>2026-11-02T16:30:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/measuring-with-different-sized-units/sssssmxw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/measuring-with-different-sized-units/sssssmxw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/measuring-with-different-sized-units/sssssmxw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/measuring-with-different-sized-units/sssssmxw"/>
      <lastmod>2026-11-01T20:36:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/measuring-with-different-sized-units/sssssmxw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/measuring-with-different-sized-units/sssssmxw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/measuring-with-different-sized-units/sssssmxw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/measuring-with-different-sized-units/sssssmxw"/>
      <lastmod>2026-11-01T20:36:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-cosine-and-tangent-in-a-unit-circle/sssssmx6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-cosine-and-tangent-in-a-unit-circle/sssssmx6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-cosine-and-tangent-in-a-unit-circle/sssssmx6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-cosine-and-tangent-in-a-unit-circle/sssssmx6"/>
      <lastmod>2026-11-02T15:18:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-cosine-and-tangent-in-a-unit-circle/sssssmx6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-cosine-and-tangent-in-a-unit-circle/sssssmx6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-cosine-and-tangent-in-a-unit-circle/sssssmx6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-cosine-and-tangent-in-a-unit-circle/sssssmx6"/>
      <lastmod>2026-11-02T15:18:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/decagon/sssssmxg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decagon/sssssmxg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decagon/sssssmxg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decagon/sssssmxg"/>
      <lastmod>2026-11-02T12:27:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/decagon/sssssmxg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decagon/sssssmxg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decagon/sssssmxg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decagon/sssssmxg"/>
      <lastmod>2026-11-02T12:27:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arithmetic-series-visualization/sssssmx9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-series-visualization/sssssmx9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-series-visualization/sssssmx9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-series-visualization/sssssmx9"/>
      <lastmod>2026-11-02T18:32:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arithmetic-series-visualization/sssssmx9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-series-visualization/sssssmx9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-series-visualization/sssssmx9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-series-visualization/sssssmx9"/>
      <lastmod>2026-11-02T18:32:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visual-proof-of-sum-of-odd-numbers/sssssmxe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visual-proof-of-sum-of-odd-numbers/sssssmxe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visual-proof-of-sum-of-odd-numbers/sssssmxe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visual-proof-of-sum-of-odd-numbers/sssssmxe"/>
      <lastmod>2026-11-01T19:20:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visual-proof-of-sum-of-odd-numbers/sssssmxe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visual-proof-of-sum-of-odd-numbers/sssssmxe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visual-proof-of-sum-of-odd-numbers/sssssmxe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visual-proof-of-sum-of-odd-numbers/sssssmxe"/>
      <lastmod>2026-11-01T19:20:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-addition-demo-by-mrjhardy/sssssmxv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-demo-by-mrjhardy/sssssmxv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-demo-by-mrjhardy/sssssmxv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-demo-by-mrjhardy/sssssmxv"/>
      <lastmod>2026-11-01T23:35:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-addition-demo-by-mrjhardy/sssssmxv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-demo-by-mrjhardy/sssssmxv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-demo-by-mrjhardy/sssssmxv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-demo-by-mrjhardy/sssssmxv"/>
      <lastmod>2026-11-01T23:35:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-regular-polygons/sssssmx4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-regular-polygons/sssssmx4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-regular-polygons/sssssmx4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-regular-polygons/sssssmx4"/>
      <lastmod>2026-11-02T17:47:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-regular-polygons/sssssmx4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-regular-polygons/sssssmx4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-regular-polygons/sssssmx4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-regular-polygons/sssssmx4"/>
      <lastmod>2026-11-02T17:47:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/double-cylinder/sssssmxl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-cylinder/sssssmxl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-cylinder/sssssmxl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-cylinder/sssssmxl"/>
      <lastmod>2026-11-02T00:05:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/double-cylinder/sssssmxl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-cylinder/sssssmxl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-cylinder/sssssmxl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-cylinder/sssssmxl"/>
      <lastmod>2026-11-02T00:05:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-linear-equations-with-grouping-symbols/sssssmxy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-equations-with-grouping-symbols/sssssmxy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-equations-with-grouping-symbols/sssssmxy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-equations-with-grouping-symbols/sssssmxy"/>
      <lastmod>2026-11-02T00:30:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-linear-equations-with-grouping-symbols/sssssmxy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-equations-with-grouping-symbols/sssssmxy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-equations-with-grouping-symbols/sssssmxy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-equations-with-grouping-symbols/sssssmxy"/>
      <lastmod>2026-11-02T00:30:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-distance-from-focus/sssssmxa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-distance-from-focus/sssssmxa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-distance-from-focus/sssssmxa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-distance-from-focus/sssssmxa"/>
      <lastmod>2026-11-02T00:44:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-distance-from-focus/sssssmxa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-distance-from-focus/sssssmxa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-distance-from-focus/sssssmxa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-distance-from-focus/sssssmxa"/>
      <lastmod>2026-11-02T00:44:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-dilations-by-molly-potter/sssssmxc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-dilations-by-molly-potter/sssssmxc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-dilations-by-molly-potter/sssssmxc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-dilations-by-molly-potter/sssssmxc"/>
      <lastmod>2026-11-02T13:01:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-dilations-by-molly-potter/sssssmxc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-dilations-by-molly-potter/sssssmxc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-dilations-by-molly-potter/sssssmxc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-dilations-by-molly-potter/sssssmxc"/>
      <lastmod>2026-11-02T13:01:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/roots-of-a-complex-number/sssssmxr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roots-of-a-complex-number/sssssmxr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roots-of-a-complex-number/sssssmxr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roots-of-a-complex-number/sssssmxr"/>
      <lastmod>2026-11-02T11:02:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/roots-of-a-complex-number/sssssmxr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roots-of-a-complex-number/sssssmxr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roots-of-a-complex-number/sssssmxr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roots-of-a-complex-number/sssssmxr"/>
      <lastmod>2026-11-02T11:02:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/addition-example/sssssmxh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-example/sssssmxh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-example/sssssmxh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-example/sssssmxh"/>
      <lastmod>2026-11-01T19:27:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/addition-example/sssssmxh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-example/sssssmxh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-example/sssssmxh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-example/sssssmxh"/>
      <lastmod>2026-11-01T19:27:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/n-is-for-net/sssssmxt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/n-is-for-net/sssssmxt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/n-is-for-net/sssssmxt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/n-is-for-net/sssssmxt"/>
      <lastmod>2026-11-02T16:50:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/n-is-for-net/sssssmxt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/n-is-for-net/sssssmxt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/n-is-for-net/sssssmxt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/n-is-for-net/sssssmxt"/>
      <lastmod>2026-11-02T16:50:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-solids-of-revolution/sssssmxx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-solids-of-revolution/sssssmxx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-solids-of-revolution/sssssmxx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-solids-of-revolution/sssssmxx"/>
      <lastmod>2026-11-02T02:34:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-solids-of-revolution/sssssmxx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-solids-of-revolution/sssssmxx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-solids-of-revolution/sssssmxx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-solids-of-revolution/sssssmxx"/>
      <lastmod>2026-11-02T02:34:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/subtraction-in-equivalent-expressions/sssssmxi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtraction-in-equivalent-expressions/sssssmxi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtraction-in-equivalent-expressions/sssssmxi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtraction-in-equivalent-expressions/sssssmxi"/>
      <lastmod>2026-11-02T10:36:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/subtraction-in-equivalent-expressions/sssssmxi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtraction-in-equivalent-expressions/sssssmxi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtraction-in-equivalent-expressions/sssssmxi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtraction-in-equivalent-expressions/sssssmxi"/>
      <lastmod>2026-11-02T10:36:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-interpretation-of-complex-arithmetic/sssssmxo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-interpretation-of-complex-arithmetic/sssssmxo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-interpretation-of-complex-arithmetic/sssssmxo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-interpretation-of-complex-arithmetic/sssssmxo"/>
      <lastmod>2026-11-01T23:45:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-interpretation-of-complex-arithmetic/sssssmxo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-interpretation-of-complex-arithmetic/sssssmxo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-interpretation-of-complex-arithmetic/sssssmxo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-interpretation-of-complex-arithmetic/sssssmxo"/>
      <lastmod>2026-11-01T23:45:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/general-quadrilateral-with-diagonals/sssssmis</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/general-quadrilateral-with-diagonals/sssssmis"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/general-quadrilateral-with-diagonals/sssssmis"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/general-quadrilateral-with-diagonals/sssssmis"/>
      <lastmod>2026-11-02T00:14:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/general-quadrilateral-with-diagonals/sssssmis</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/general-quadrilateral-with-diagonals/sssssmis"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/general-quadrilateral-with-diagonals/sssssmis"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/general-quadrilateral-with-diagonals/sssssmis"/>
      <lastmod>2026-11-02T00:14:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplication-wheel-by-daniel-mentrard/sssssmi7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-wheel-by-daniel-mentrard/sssssmi7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-wheel-by-daniel-mentrard/sssssmi7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-wheel-by-daniel-mentrard/sssssmi7"/>
      <lastmod>2026-11-01T20:43:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplication-wheel-by-daniel-mentrard/sssssmi7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-wheel-by-daniel-mentrard/sssssmi7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-wheel-by-daniel-mentrard/sssssmi7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-wheel-by-daniel-mentrard/sssssmi7"/>
      <lastmod>2026-11-01T20:43:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-cone-by/sssssmin</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by/sssssmin"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cone-by/sssssmin"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by/sssssmin"/>
      <lastmod>2026-11-02T00:08:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-a-cone-by/sssssmin</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by/sssssmin"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cone-by/sssssmin"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by/sssssmin"/>
      <lastmod>2026-11-02T00:08:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-7-4-1-practice-many-flags/sssssmi2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-4-1-practice-many-flags/sssssmi2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-4-1-practice-many-flags/sssssmi2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-4-1-practice-many-flags/sssssmi2"/>
      <lastmod>2026-11-01T20:24:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-7-4-1-practice-many-flags/sssssmi2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-4-1-practice-many-flags/sssssmi2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-4-1-practice-many-flags/sssssmi2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-4-1-practice-many-flags/sssssmi2"/>
      <lastmod>2026-11-01T20:24:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/taylor-inequality-lagrange-error-bound/sssssmik</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/taylor-inequality-lagrange-error-bound/sssssmik"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/taylor-inequality-lagrange-error-bound/sssssmik"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/taylor-inequality-lagrange-error-bound/sssssmik"/>
      <lastmod>2026-11-02T18:11:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/taylor-inequality-lagrange-error-bound/sssssmik</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/taylor-inequality-lagrange-error-bound/sssssmik"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/taylor-inequality-lagrange-error-bound/sssssmik"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/taylor-inequality-lagrange-error-bound/sssssmik"/>
      <lastmod>2026-11-02T18:11:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-exploration-in-right-triangle/sssssmiz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-exploration-in-right-triangle/sssssmiz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-exploration-in-right-triangle/sssssmiz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-exploration-in-right-triangle/sssssmiz"/>
      <lastmod>2026-11-02T18:28:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-exploration-in-right-triangle/sssssmiz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-exploration-in-right-triangle/sssssmiz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-exploration-in-right-triangle/sssssmiz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-exploration-in-right-triangle/sssssmiz"/>
      <lastmod>2026-11-02T18:28:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angles-of-right-triangles/sssssmi0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-of-right-triangles/sssssmi0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-of-right-triangles/sssssmi0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-of-right-triangles/sssssmi0"/>
      <lastmod>2026-11-02T13:53:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angles-of-right-triangles/sssssmi0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-of-right-triangles/sssssmi0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-of-right-triangles/sssssmi0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-of-right-triangles/sssssmi0"/>
      <lastmod>2026-11-02T13:53:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-equality-demo/sssssmid</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-equality-demo/sssssmid"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-equality-demo/sssssmid"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-equality-demo/sssssmid"/>
      <lastmod>2026-11-02T18:05:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-equality-demo/sssssmid</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-equality-demo/sssssmid"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-equality-demo/sssssmid"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-equality-demo/sssssmid"/>
      <lastmod>2026-11-02T18:05:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/buildings-logic-game/sssssmif</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/buildings-logic-game/sssssmif"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/buildings-logic-game/sssssmif"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/buildings-logic-game/sssssmif"/>
      <lastmod>2026-11-02T06:45:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/buildings-logic-game/sssssmif</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/buildings-logic-game/sssssmif"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/buildings-logic-game/sssssmif"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/buildings-logic-game/sssssmif"/>
      <lastmod>2026-11-02T06:45:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/movable-elements-venn-diagram/sssssmi8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/movable-elements-venn-diagram/sssssmi8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/movable-elements-venn-diagram/sssssmi8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/movable-elements-venn-diagram/sssssmi8"/>
      <lastmod>2026-11-01T19:00:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/movable-elements-venn-diagram/sssssmi8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/movable-elements-venn-diagram/sssssmi8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/movable-elements-venn-diagram/sssssmi8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/movable-elements-venn-diagram/sssssmi8"/>
      <lastmod>2026-11-01T19:00:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-slopes-investigation/sssssmiu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-slopes-investigation/sssssmiu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-slopes-investigation/sssssmiu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-slopes-investigation/sssssmiu"/>
      <lastmod>2026-11-01T19:16:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-slopes-investigation/sssssmiu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-slopes-investigation/sssssmiu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-slopes-investigation/sssssmiu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-slopes-investigation/sssssmiu"/>
      <lastmod>2026-11-01T19:16:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-a-parallelopiped/sssssmi5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-parallelopiped/sssssmi5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-parallelopiped/sssssmi5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-parallelopiped/sssssmi5"/>
      <lastmod>2026-11-02T18:17:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-a-parallelopiped/sssssmi5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-parallelopiped/sssssmi5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-parallelopiped/sssssmi5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-parallelopiped/sssssmi5"/>
      <lastmod>2026-11-02T18:17:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersecting-spheres-by-kevlawr/sssssmib</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersecting-spheres-by-kevlawr/sssssmib"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersecting-spheres-by-kevlawr/sssssmib"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersecting-spheres-by-kevlawr/sssssmib"/>
      <lastmod>2026-11-02T17:16:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersecting-spheres-by-kevlawr/sssssmib</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersecting-spheres-by-kevlawr/sssssmib"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersecting-spheres-by-kevlawr/sssssmib"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersecting-spheres-by-kevlawr/sssssmib"/>
      <lastmod>2026-11-02T17:16:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bearing-summary/sssssmi3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bearing-summary/sssssmi3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bearing-summary/sssssmi3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bearing-summary/sssssmi3"/>
      <lastmod>2026-11-02T12:33:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bearing-summary/sssssmi3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bearing-summary/sssssmi3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bearing-summary/sssssmi3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bearing-summary/sssssmi3"/>
      <lastmod>2026-11-02T12:33:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbolic-tanh-coth-graphs/sssssmiq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbolic-tanh-coth-graphs/sssssmiq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbolic-tanh-coth-graphs/sssssmiq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbolic-tanh-coth-graphs/sssssmiq"/>
      <lastmod>2026-11-01T19:00:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbolic-tanh-coth-graphs/sssssmiq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbolic-tanh-coth-graphs/sssssmiq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbolic-tanh-coth-graphs/sssssmiq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbolic-tanh-coth-graphs/sssssmiq"/>
      <lastmod>2026-11-01T19:00:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-construction-by-tbignell/sssssmi1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-tbignell/sssssmi1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-by-tbignell/sssssmi1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-tbignell/sssssmi1"/>
      <lastmod>2026-11-01T23:33:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-construction-by-tbignell/sssssmi1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-tbignell/sssssmi1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-by-tbignell/sssssmi1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-tbignell/sssssmi1"/>
      <lastmod>2026-11-01T23:33:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-regression-demo/sssssmim</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-regression-demo/sssssmim"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-regression-demo/sssssmim"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-regression-demo/sssssmim"/>
      <lastmod>2026-11-02T16:33:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-regression-demo/sssssmim</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-regression-demo/sssssmim"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-regression-demo/sssssmim"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-regression-demo/sssssmim"/>
      <lastmod>2026-11-02T16:33:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-functions-slope-intercept-form-demo/sssssmij</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions-slope-intercept-form-demo/sssssmij"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions-slope-intercept-form-demo/sssssmij"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions-slope-intercept-form-demo/sssssmij"/>
      <lastmod>2026-11-02T00:29:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-functions-slope-intercept-form-demo/sssssmij</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions-slope-intercept-form-demo/sssssmij"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions-slope-intercept-form-demo/sssssmij"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions-slope-intercept-form-demo/sssssmij"/>
      <lastmod>2026-11-02T00:29:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/land-division/sssssmip</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/land-division/sssssmip"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/land-division/sssssmip"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/land-division/sssssmip"/>
      <lastmod>2026-11-02T17:58:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/land-division/sssssmip</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/land-division/sssssmip"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/land-division/sssssmip"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/land-division/sssssmip"/>
      <lastmod>2026-11-02T17:58:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/planes-planes/sssssmiw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planes-planes/sssssmiw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes-planes/sssssmiw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes-planes/sssssmiw"/>
      <lastmod>2026-11-02T00:46:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/planes-planes/sssssmiw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planes-planes/sssssmiw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes-planes/sssssmiw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes-planes/sssssmiw"/>
      <lastmod>2026-11-02T00:46:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotational-symmetry-by-amy-field/sssssmi6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-amy-field/sssssmi6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-by-amy-field/sssssmi6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-amy-field/sssssmi6"/>
      <lastmod>2026-11-01T21:52:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotational-symmetry-by-amy-field/sssssmi6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-amy-field/sssssmi6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-by-amy-field/sssssmi6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-amy-field/sssssmi6"/>
      <lastmod>2026-11-01T21:52:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/summation-formative-assessment/sssssmig</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/summation-formative-assessment/sssssmig"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/summation-formative-assessment/sssssmig"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/summation-formative-assessment/sssssmig"/>
      <lastmod>2026-11-01T20:42:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/summation-formative-assessment/sssssmig</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/summation-formative-assessment/sssssmig"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/summation-formative-assessment/sssssmig"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/summation-formative-assessment/sssssmig"/>
      <lastmod>2026-11-01T20:42:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mouhefanggai-locus-tracing/sssssmi9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mouhefanggai-locus-tracing/sssssmi9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mouhefanggai-locus-tracing/sssssmi9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mouhefanggai-locus-tracing/sssssmi9"/>
      <lastmod>2026-11-02T13:07:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mouhefanggai-locus-tracing/sssssmi9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mouhefanggai-locus-tracing/sssssmi9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mouhefanggai-locus-tracing/sssssmi9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mouhefanggai-locus-tracing/sssssmi9"/>
      <lastmod>2026-11-02T13:07:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bike-ride-task/sssssmie</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bike-ride-task/sssssmie"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bike-ride-task/sssssmie"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bike-ride-task/sssssmie"/>
      <lastmod>2026-11-02T13:50:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bike-ride-task/sssssmie</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bike-ride-task/sssssmie"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bike-ride-task/sssssmie"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bike-ride-task/sssssmie"/>
      <lastmod>2026-11-02T13:50:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/directional-derivative-demo-by-gary-church/sssssmiv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directional-derivative-demo-by-gary-church/sssssmiv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directional-derivative-demo-by-gary-church/sssssmiv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directional-derivative-demo-by-gary-church/sssssmiv"/>
      <lastmod>2026-11-02T07:37:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/directional-derivative-demo-by-gary-church/sssssmiv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directional-derivative-demo-by-gary-church/sssssmiv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directional-derivative-demo-by-gary-church/sssssmiv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directional-derivative-demo-by-gary-church/sssssmiv"/>
      <lastmod>2026-11-02T07:37:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-slice/sssssmi4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-slice/sssssmi4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-slice/sssssmi4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-slice/sssssmi4"/>
      <lastmod>2026-11-02T12:40:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-slice/sssssmi4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-slice/sssssmi4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-slice/sssssmi4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-slice/sssssmi4"/>
      <lastmod>2026-11-02T12:40:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-congruent-triangles/sssssmil</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-congruent-triangles/sssssmil"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-congruent-triangles/sssssmil"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-congruent-triangles/sssssmil"/>
      <lastmod>2026-11-01T21:17:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-congruent-triangles/sssssmil</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-congruent-triangles/sssssmil"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-congruent-triangles/sssssmil"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-congruent-triangles/sssssmil"/>
      <lastmod>2026-11-01T21:17:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hexagonal-pyramid-construction/sssssmiy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagonal-pyramid-construction/sssssmiy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagonal-pyramid-construction/sssssmiy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagonal-pyramid-construction/sssssmiy"/>
      <lastmod>2026-11-02T18:11:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hexagonal-pyramid-construction/sssssmiy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagonal-pyramid-construction/sssssmiy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagonal-pyramid-construction/sssssmiy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagonal-pyramid-construction/sssssmiy"/>
      <lastmod>2026-11-02T18:11:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-the-unit-circle/sssssmia</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-unit-circle/sssssmia"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-unit-circle/sssssmia"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-unit-circle/sssssmia"/>
      <lastmod>2026-11-01T19:21:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-the-unit-circle/sssssmia</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-unit-circle/sssssmia"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-unit-circle/sssssmia"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-unit-circle/sssssmia"/>
      <lastmod>2026-11-01T19:21:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/growth-decay-model/sssssmic</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/growth-decay-model/sssssmic"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/growth-decay-model/sssssmic"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/growth-decay-model/sssssmic"/>
      <lastmod>2026-11-02T09:14:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/growth-decay-model/sssssmic</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/growth-decay-model/sssssmic"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/growth-decay-model/sssssmic"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/growth-decay-model/sssssmic"/>
      <lastmod>2026-11-02T09:14:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/algebra-tiles-solving-one-step-equations/sssssmir</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebra-tiles-solving-one-step-equations/sssssmir"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebra-tiles-solving-one-step-equations/sssssmir"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebra-tiles-solving-one-step-equations/sssssmir"/>
      <lastmod>2026-11-01T21:31:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/algebra-tiles-solving-one-step-equations/sssssmir</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebra-tiles-solving-one-step-equations/sssssmir"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebra-tiles-solving-one-step-equations/sssssmir"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebra-tiles-solving-one-step-equations/sssssmir"/>
      <lastmod>2026-11-01T21:31:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/point-in-time-vs-time-duration-on-a-timeline/sssssmih</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-in-time-vs-time-duration-on-a-timeline/sssssmih"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-in-time-vs-time-duration-on-a-timeline/sssssmih"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-in-time-vs-time-duration-on-a-timeline/sssssmih"/>
      <lastmod>2026-11-02T18:26:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/point-in-time-vs-time-duration-on-a-timeline/sssssmih</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-in-time-vs-time-duration-on-a-timeline/sssssmih"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-in-time-vs-time-duration-on-a-timeline/sssssmih"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-in-time-vs-time-duration-on-a-timeline/sssssmih"/>
      <lastmod>2026-11-02T18:26:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-interactive-exploring-symmetry-and-angle-bisectors/sssssmit</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-interactive-exploring-symmetry-and-angle-bisectors/sssssmit"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-interactive-exploring-symmetry-and-angle-bisectors/sssssmit"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-interactive-exploring-symmetry-and-angle-bisectors/sssssmit"/>
      <lastmod>2026-11-02T17:56:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-interactive-exploring-symmetry-and-angle-bisectors/sssssmit</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-interactive-exploring-symmetry-and-angle-bisectors/sssssmit"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-interactive-exploring-symmetry-and-angle-bisectors/sssssmit"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-interactive-exploring-symmetry-and-angle-bisectors/sssssmit"/>
      <lastmod>2026-11-02T17:56:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ws6-pyramid-model/sssssmix</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ws6-pyramid-model/sssssmix"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ws6-pyramid-model/sssssmix"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ws6-pyramid-model/sssssmix"/>
      <lastmod>2026-11-02T17:38:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ws6-pyramid-model/sssssmix</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ws6-pyramid-model/sssssmix"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ws6-pyramid-model/sssssmix"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ws6-pyramid-model/sssssmix"/>
      <lastmod>2026-11-02T17:38:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-linear-equations-by-tmoorehead/sssssmii</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-equations-by-tmoorehead/sssssmii"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-equations-by-tmoorehead/sssssmii"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-equations-by-tmoorehead/sssssmii"/>
      <lastmod>2026-11-02T09:14:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-linear-equations-by-tmoorehead/sssssmii</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-equations-by-tmoorehead/sssssmii"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-equations-by-tmoorehead/sssssmii"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-equations-by-tmoorehead/sssssmii"/>
      <lastmod>2026-11-02T09:14:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-cube-javascript/sssssmio</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-cube-javascript/sssssmio"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-cube-javascript/sssssmio"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-cube-javascript/sssssmio"/>
      <lastmod>2026-11-02T09:55:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-cube-javascript/sssssmio</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-cube-javascript/sssssmio"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-cube-javascript/sssssmio"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-cube-javascript/sssssmio"/>
      <lastmod>2026-11-02T09:55:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/signs-of-x-and-y-coordinates-in-each-quadrant/sssssmos</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/signs-of-x-and-y-coordinates-in-each-quadrant/sssssmos"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/signs-of-x-and-y-coordinates-in-each-quadrant/sssssmos"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/signs-of-x-and-y-coordinates-in-each-quadrant/sssssmos"/>
      <lastmod>2026-11-02T16:49:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/signs-of-x-and-y-coordinates-in-each-quadrant/sssssmos</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/signs-of-x-and-y-coordinates-in-each-quadrant/sssssmos"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/signs-of-x-and-y-coordinates-in-each-quadrant/sssssmos"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/signs-of-x-and-y-coordinates-in-each-quadrant/sssssmos"/>
      <lastmod>2026-11-02T16:49:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-construction-with-three-points/sssssmo7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-construction-with-three-points/sssssmo7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-construction-with-three-points/sssssmo7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-construction-with-three-points/sssssmo7"/>
      <lastmod>2026-11-02T16:30:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-construction-with-three-points/sssssmo7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-construction-with-three-points/sssssmo7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-construction-with-three-points/sssssmo7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-construction-with-three-points/sssssmo7"/>
      <lastmod>2026-11-02T16:30:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualize-mean-and-median/sssssmon</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualize-mean-and-median/sssssmon"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualize-mean-and-median/sssssmon"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualize-mean-and-median/sssssmon"/>
      <lastmod>2026-11-01T22:01:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualize-mean-and-median/sssssmon</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualize-mean-and-median/sssssmon"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualize-mean-and-median/sssssmon"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualize-mean-and-median/sssssmon"/>
      <lastmod>2026-11-01T22:01:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/optimization-for-ranchers/sssssmo2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/optimization-for-ranchers/sssssmo2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/optimization-for-ranchers/sssssmo2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/optimization-for-ranchers/sssssmo2"/>
      <lastmod>2026-11-01T19:00:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/optimization-for-ranchers/sssssmo2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/optimization-for-ranchers/sssssmo2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/optimization-for-ranchers/sssssmo2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/optimization-for-ranchers/sssssmo2"/>
      <lastmod>2026-11-01T19:00:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/basic-geometric-constructions/sssssmok</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-geometric-constructions/sssssmok"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-geometric-constructions/sssssmok"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-geometric-constructions/sssssmok"/>
      <lastmod>2026-11-02T17:00:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/basic-geometric-constructions/sssssmok</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-geometric-constructions/sssssmok"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-geometric-constructions/sssssmok"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-geometric-constructions/sssssmok"/>
      <lastmod>2026-11-02T17:00:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pointed-hats/sssssmoz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pointed-hats/sssssmoz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pointed-hats/sssssmoz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pointed-hats/sssssmoz"/>
      <lastmod>2026-11-01T19:06:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pointed-hats/sssssmoz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pointed-hats/sssssmoz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pointed-hats/sssssmoz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pointed-hats/sssssmoz"/>
      <lastmod>2026-11-01T19:06:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inverse-trigonometric-functions-as-reflections-on-y-x/sssssmo0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inverse-trigonometric-functions-as-reflections-on-y-x/sssssmo0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inverse-trigonometric-functions-as-reflections-on-y-x/sssssmo0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inverse-trigonometric-functions-as-reflections-on-y-x/sssssmo0"/>
      <lastmod>2026-11-02T14:53:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inverse-trigonometric-functions-as-reflections-on-y-x/sssssmo0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inverse-trigonometric-functions-as-reflections-on-y-x/sssssmo0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inverse-trigonometric-functions-as-reflections-on-y-x/sssssmo0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inverse-trigonometric-functions-as-reflections-on-y-x/sssssmo0"/>
      <lastmod>2026-11-02T14:53:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-by-d-jayaseelan-2/sssssmod</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-by-d-jayaseelan-2/sssssmod"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-by-d-jayaseelan-2/sssssmod"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-by-d-jayaseelan-2/sssssmod"/>
      <lastmod>2026-11-02T17:55:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-by-d-jayaseelan-2/sssssmod</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-by-d-jayaseelan-2/sssssmod"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-by-d-jayaseelan-2/sssssmod"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-by-d-jayaseelan-2/sssssmod"/>
      <lastmod>2026-11-02T17:55:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-line-segment-intersection-visualization/sssssmof</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-line-segment-intersection-visualization/sssssmof"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-line-segment-intersection-visualization/sssssmof"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-line-segment-intersection-visualization/sssssmof"/>
      <lastmod>2026-11-02T03:00:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-line-segment-intersection-visualization/sssssmof</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-line-segment-intersection-visualization/sssssmof"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-line-segment-intersection-visualization/sssssmof"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-line-segment-intersection-visualization/sssssmof"/>
      <lastmod>2026-11-02T03:00:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cuboctahedron-by-chris-cambr/sssssmo8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cuboctahedron-by-chris-cambr/sssssmo8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cuboctahedron-by-chris-cambr/sssssmo8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cuboctahedron-by-chris-cambr/sssssmo8"/>
      <lastmod>2026-11-02T17:52:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cuboctahedron-by-chris-cambr/sssssmo8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cuboctahedron-by-chris-cambr/sssssmo8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cuboctahedron-by-chris-cambr/sssssmo8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cuboctahedron-by-chris-cambr/sssssmo8"/>
      <lastmod>2026-11-02T17:52:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-inequalities-demo-by-d-vasu-raj/sssssmou</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-demo-by-d-vasu-raj/sssssmou"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-inequalities-demo-by-d-vasu-raj/sssssmou"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-demo-by-d-vasu-raj/sssssmou"/>
      <lastmod>2026-11-02T08:37:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-inequalities-demo-by-d-vasu-raj/sssssmou</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-demo-by-d-vasu-raj/sssssmou"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-inequalities-demo-by-d-vasu-raj/sssssmou"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-demo-by-d-vasu-raj/sssssmou"/>
      <lastmod>2026-11-02T08:37:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/archimedes-infinite-sum/sssssmo5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/archimedes-infinite-sum/sssssmo5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/archimedes-infinite-sum/sssssmo5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/archimedes-infinite-sum/sssssmo5"/>
      <lastmod>2026-11-01T21:44:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/archimedes-infinite-sum/sssssmo5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/archimedes-infinite-sum/sssssmo5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/archimedes-infinite-sum/sssssmo5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/archimedes-infinite-sum/sssssmo5"/>
      <lastmod>2026-11-01T21:44:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/algebra-of-plane-vectors-by-nbaddam17/sssssmob</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebra-of-plane-vectors-by-nbaddam17/sssssmob"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebra-of-plane-vectors-by-nbaddam17/sssssmob"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebra-of-plane-vectors-by-nbaddam17/sssssmob"/>
      <lastmod>2026-11-02T18:21:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/algebra-of-plane-vectors-by-nbaddam17/sssssmob</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebra-of-plane-vectors-by-nbaddam17/sssssmob"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebra-of-plane-vectors-by-nbaddam17/sssssmob"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebra-of-plane-vectors-by-nbaddam17/sssssmob"/>
      <lastmod>2026-11-02T18:21:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/curves-and-links-from-circles/sssssmo3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curves-and-links-from-circles/sssssmo3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curves-and-links-from-circles/sssssmo3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curves-and-links-from-circles/sssssmo3"/>
      <lastmod>2026-11-01T20:51:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/curves-and-links-from-circles/sssssmo3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curves-and-links-from-circles/sssssmo3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curves-and-links-from-circles/sssssmo3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curves-and-links-from-circles/sssssmo3"/>
      <lastmod>2026-11-01T20:51:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-linear-equations-with-slope-y-intercept/sssssmoq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-with-slope-y-intercept/sssssmoq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-equations-with-slope-y-intercept/sssssmoq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-with-slope-y-intercept/sssssmoq"/>
      <lastmod>2026-11-02T06:34:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-linear-equations-with-slope-y-intercept/sssssmoq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-with-slope-y-intercept/sssssmoq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-equations-with-slope-y-intercept/sssssmoq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-with-slope-y-intercept/sssssmoq"/>
      <lastmod>2026-11-02T06:34:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rational-numbers/sssssmo1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rational-numbers/sssssmo1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rational-numbers/sssssmo1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rational-numbers/sssssmo1"/>
      <lastmod>2026-11-01T21:24:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rational-numbers/sssssmo1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rational-numbers/sssssmo1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rational-numbers/sssssmo1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rational-numbers/sssssmo1"/>
      <lastmod>2026-11-01T21:24:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-circle-area-via-parallelogram/sssssmom</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-circle-area-via-parallelogram/sssssmom"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-circle-area-via-parallelogram/sssssmom"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-circle-area-via-parallelogram/sssssmom"/>
      <lastmod>2026-11-02T16:56:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-circle-area-via-parallelogram/sssssmom</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-circle-area-via-parallelogram/sssssmom"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-circle-area-via-parallelogram/sssssmom"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-circle-area-via-parallelogram/sssssmom"/>
      <lastmod>2026-11-02T16:56:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construct-a-regular-octagon/sssssmoj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-a-regular-octagon/sssssmoj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-a-regular-octagon/sssssmoj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-a-regular-octagon/sssssmoj"/>
      <lastmod>2026-11-01T23:54:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construct-a-regular-octagon/sssssmoj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-a-regular-octagon/sssssmoj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-a-regular-octagon/sssssmoj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-a-regular-octagon/sssssmoj"/>
      <lastmod>2026-11-01T23:54:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/domain-and-range-of-exponential-functions/sssssmop</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/domain-and-range-of-exponential-functions/sssssmop"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/domain-and-range-of-exponential-functions/sssssmop"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/domain-and-range-of-exponential-functions/sssssmop"/>
      <lastmod>2026-11-02T18:45:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/domain-and-range-of-exponential-functions/sssssmop</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/domain-and-range-of-exponential-functions/sssssmop"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/domain-and-range-of-exponential-functions/sssssmop"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/domain-and-range-of-exponential-functions/sssssmop"/>
      <lastmod>2026-11-02T18:45:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/doubling-a-cube/sssssmow</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/doubling-a-cube/sssssmow"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/doubling-a-cube/sssssmow"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/doubling-a-cube/sssssmow"/>
      <lastmod>2026-11-01T19:36:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/doubling-a-cube/sssssmow</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/doubling-a-cube/sssssmow"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/doubling-a-cube/sssssmow"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/doubling-a-cube/sssssmow"/>
      <lastmod>2026-11-01T19:36:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perimeter-of-n-polygon-with-radius-1/sssssmo6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-of-n-polygon-with-radius-1/sssssmo6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-of-n-polygon-with-radius-1/sssssmo6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-of-n-polygon-with-radius-1/sssssmo6"/>
      <lastmod>2026-11-02T00:31:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perimeter-of-n-polygon-with-radius-1/sssssmo6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-of-n-polygon-with-radius-1/sssssmo6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-of-n-polygon-with-radius-1/sssssmo6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-of-n-polygon-with-radius-1/sssssmo6"/>
      <lastmod>2026-11-02T00:31:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/f1-coordinates-9-3c/sssssmog</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/f1-coordinates-9-3c/sssssmog"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/f1-coordinates-9-3c/sssssmog"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/f1-coordinates-9-3c/sssssmog"/>
      <lastmod>2026-11-02T16:39:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/f1-coordinates-9-3c/sssssmog</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/f1-coordinates-9-3c/sssssmog"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/f1-coordinates-9-3c/sssssmog"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/f1-coordinates-9-3c/sssssmog"/>
      <lastmod>2026-11-02T16:39:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-perimeter-quiz/sssssmo9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-perimeter-quiz/sssssmo9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-perimeter-quiz/sssssmo9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-perimeter-quiz/sssssmo9"/>
      <lastmod>2026-11-02T12:34:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-perimeter-quiz/sssssmo9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-perimeter-quiz/sssssmo9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-perimeter-quiz/sssssmo9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-perimeter-quiz/sssssmo9"/>
      <lastmod>2026-11-02T12:34:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angles-part-3/sssssmoe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-part-3/sssssmoe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-part-3/sssssmoe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-part-3/sssssmoe"/>
      <lastmod>2026-11-02T18:07:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angles-part-3/sssssmoe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-part-3/sssssmoe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-part-3/sssssmoe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-part-3/sssssmoe"/>
      <lastmod>2026-11-02T18:07:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-nets-by-mr-coffie/sssssmov</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-nets-by-mr-coffie/sssssmov"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-nets-by-mr-coffie/sssssmov"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-nets-by-mr-coffie/sssssmov"/>
      <lastmod>2026-11-01T23:37:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-nets-by-mr-coffie/sssssmov</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-nets-by-mr-coffie/sssssmov"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-nets-by-mr-coffie/sssssmov"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-nets-by-mr-coffie/sssssmov"/>
      <lastmod>2026-11-01T23:37:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/collapsing-compass-equivalent-to-rigid-compass/sssssmo4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/collapsing-compass-equivalent-to-rigid-compass/sssssmo4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/collapsing-compass-equivalent-to-rigid-compass/sssssmo4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/collapsing-compass-equivalent-to-rigid-compass/sssssmo4"/>
      <lastmod>2026-11-01T23:46:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/collapsing-compass-equivalent-to-rigid-compass/sssssmo4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/collapsing-compass-equivalent-to-rigid-compass/sssssmo4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/collapsing-compass-equivalent-to-rigid-compass/sssssmo4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/collapsing-compass-equivalent-to-rigid-compass/sssssmo4"/>
      <lastmod>2026-11-01T23:46:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/8-2-orthogonal-diagonalization/sssssmol</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/8-2-orthogonal-diagonalization/sssssmol"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/8-2-orthogonal-diagonalization/sssssmol"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/8-2-orthogonal-diagonalization/sssssmol"/>
      <lastmod>2026-11-02T08:31:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/8-2-orthogonal-diagonalization/sssssmol</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/8-2-orthogonal-diagonalization/sssssmol"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/8-2-orthogonal-diagonalization/sssssmol"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/8-2-orthogonal-diagonalization/sssssmol"/>
      <lastmod>2026-11-02T08:31:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/2d-cone-filling-model/sssssmoy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-cone-filling-model/sssssmoy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-cone-filling-model/sssssmoy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-cone-filling-model/sssssmoy"/>
      <lastmod>2026-11-02T03:02:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/2d-cone-filling-model/sssssmoy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-cone-filling-model/sssssmoy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-cone-filling-model/sssssmoy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-cone-filling-model/sssssmoy"/>
      <lastmod>2026-11-02T03:02:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-division-demonstration-by-diego-lieban/sssssmoa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-division-demonstration-by-diego-lieban/sssssmoa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-division-demonstration-by-diego-lieban/sssssmoa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-division-demonstration-by-diego-lieban/sssssmoa"/>
      <lastmod>2026-11-02T02:49:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-division-demonstration-by-diego-lieban/sssssmoa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-division-demonstration-by-diego-lieban/sssssmoa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-division-demonstration-by-diego-lieban/sssssmoa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-division-demonstration-by-diego-lieban/sssssmoa"/>
      <lastmod>2026-11-02T02:49:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperboloid-as-a-ruled-surface/sssssmoc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperboloid-as-a-ruled-surface/sssssmoc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperboloid-as-a-ruled-surface/sssssmoc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperboloid-as-a-ruled-surface/sssssmoc"/>
      <lastmod>2026-11-01T19:16:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperboloid-as-a-ruled-surface/sssssmoc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperboloid-as-a-ruled-surface/sssssmoc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperboloid-as-a-ruled-surface/sssssmoc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperboloid-as-a-ruled-surface/sssssmoc"/>
      <lastmod>2026-11-01T19:16:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-rectangular-prisms-by-brooke/sssssmor</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-rectangular-prisms-by-brooke/sssssmor"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-rectangular-prisms-by-brooke/sssssmor"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-rectangular-prisms-by-brooke/sssssmor"/>
      <lastmod>2026-11-02T18:17:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-rectangular-prisms-by-brooke/sssssmor</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-rectangular-prisms-by-brooke/sssssmor"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-rectangular-prisms-by-brooke/sssssmor"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-rectangular-prisms-by-brooke/sssssmor"/>
      <lastmod>2026-11-02T18:17:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplication-of-proper-fraction-by-whole-number-by-rohit-roy/sssssmoh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-of-proper-fraction-by-whole-number-by-rohit-roy/sssssmoh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-of-proper-fraction-by-whole-number-by-rohit-roy/sssssmoh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-of-proper-fraction-by-whole-number-by-rohit-roy/sssssmoh"/>
      <lastmod>2026-11-02T02:45:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplication-of-proper-fraction-by-whole-number-by-rohit-roy/sssssmoh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-of-proper-fraction-by-whole-number-by-rohit-roy/sssssmoh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-of-proper-fraction-by-whole-number-by-rohit-roy/sssssmoh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-of-proper-fraction-by-whole-number-by-rohit-roy/sssssmoh"/>
      <lastmod>2026-11-02T02:45:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-fractions-by-eva-lai/sssssmot</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-fractions-by-eva-lai/sssssmot"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-fractions-by-eva-lai/sssssmot"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-fractions-by-eva-lai/sssssmot"/>
      <lastmod>2026-11-02T12:10:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-fractions-by-eva-lai/sssssmot</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-fractions-by-eva-lai/sssssmot"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-fractions-by-eva-lai/sssssmot"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-fractions-by-eva-lai/sssssmot"/>
      <lastmod>2026-11-02T12:10:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/relationship-between-speed-instantaneous-speed/sssssmox</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relationship-between-speed-instantaneous-speed/sssssmox"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relationship-between-speed-instantaneous-speed/sssssmox"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relationship-between-speed-instantaneous-speed/sssssmox"/>
      <lastmod>2026-11-02T18:49:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/relationship-between-speed-instantaneous-speed/sssssmox</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relationship-between-speed-instantaneous-speed/sssssmox"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relationship-between-speed-instantaneous-speed/sssssmox"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relationship-between-speed-instantaneous-speed/sssssmox"/>
      <lastmod>2026-11-02T18:49:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inequality-constrained-triangle-centroid-and-linear-programming-example/sssssmoi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inequality-constrained-triangle-centroid-and-linear-programming-example/sssssmoi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inequality-constrained-triangle-centroid-and-linear-programming-example/sssssmoi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inequality-constrained-triangle-centroid-and-linear-programming-example/sssssmoi"/>
      <lastmod>2026-11-02T02:57:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inequality-constrained-triangle-centroid-and-linear-programming-example/sssssmoi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inequality-constrained-triangle-centroid-and-linear-programming-example/sssssmoi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inequality-constrained-triangle-centroid-and-linear-programming-example/sssssmoi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inequality-constrained-triangle-centroid-and-linear-programming-example/sssssmoi"/>
      <lastmod>2026-11-02T02:57:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-from-first-principles-demo/sssssmoo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-from-first-principles-demo/sssssmoo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-from-first-principles-demo/sssssmoo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-from-first-principles-demo/sssssmoo"/>
      <lastmod>2026-11-01T20:54:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-from-first-principles-demo/sssssmoo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-from-first-principles-demo/sssssmoo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-from-first-principles-demo/sssssmoo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-from-first-principles-demo/sssssmoo"/>
      <lastmod>2026-11-01T20:54:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-rotation-of-two-parabolas/sssssjss</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-rotation-of-two-parabolas/sssssjss"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-rotation-of-two-parabolas/sssssjss"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-rotation-of-two-parabolas/sssssjss"/>
      <lastmod>2026-11-02T17:41:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-rotation-of-two-parabolas/sssssjss</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-rotation-of-two-parabolas/sssssjss"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-rotation-of-two-parabolas/sssssjss"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-rotation-of-two-parabolas/sssssjss"/>
      <lastmod>2026-11-02T17:41:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rubik-s-cube-model/sssssjs7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rubik-s-cube-model/sssssjs7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rubik-s-cube-model/sssssjs7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rubik-s-cube-model/sssssjs7"/>
      <lastmod>2026-11-02T00:28:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rubik-s-cube-model/sssssjs7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rubik-s-cube-model/sssssjs7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rubik-s-cube-model/sssssjs7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rubik-s-cube-model/sssssjs7"/>
      <lastmod>2026-11-02T00:28:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/earth-s-orbit-and-seasonal-changes/sssssjsn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/earth-s-orbit-and-seasonal-changes/sssssjsn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/earth-s-orbit-and-seasonal-changes/sssssjsn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/earth-s-orbit-and-seasonal-changes/sssssjsn"/>
      <lastmod>2026-11-01T23:25:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/earth-s-orbit-and-seasonal-changes/sssssjsn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/earth-s-orbit-and-seasonal-changes/sssssjsn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/earth-s-orbit-and-seasonal-changes/sssssjsn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/earth-s-orbit-and-seasonal-changes/sssssjsn"/>
      <lastmod>2026-11-01T23:25:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-quadratic-functions-by-nurazreen-mohd-tahir/sssssjs2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-by-nurazreen-mohd-tahir/sssssjs2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-functions-by-nurazreen-mohd-tahir/sssssjs2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-by-nurazreen-mohd-tahir/sssssjs2"/>
      <lastmod>2026-11-01T19:27:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-quadratic-functions-by-nurazreen-mohd-tahir/sssssjs2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-by-nurazreen-mohd-tahir/sssssjs2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-functions-by-nurazreen-mohd-tahir/sssssjs2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-by-nurazreen-mohd-tahir/sssssjs2"/>
      <lastmod>2026-11-01T19:27:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/space-time-unit-circle-trigonometric-visualization/sssssjsk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/space-time-unit-circle-trigonometric-visualization/sssssjsk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/space-time-unit-circle-trigonometric-visualization/sssssjsk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/space-time-unit-circle-trigonometric-visualization/sssssjsk"/>
      <lastmod>2026-11-02T09:59:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/space-time-unit-circle-trigonometric-visualization/sssssjsk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/space-time-unit-circle-trigonometric-visualization/sssssjsk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/space-time-unit-circle-trigonometric-visualization/sssssjsk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/space-time-unit-circle-trigonometric-visualization/sssssjsk"/>
      <lastmod>2026-11-02T09:59:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramids-inscribed-in-a-cube/sssssjsz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramids-inscribed-in-a-cube/sssssjsz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramids-inscribed-in-a-cube/sssssjsz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramids-inscribed-in-a-cube/sssssjsz"/>
      <lastmod>2026-11-02T12:09:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramids-inscribed-in-a-cube/sssssjsz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramids-inscribed-in-a-cube/sssssjsz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramids-inscribed-in-a-cube/sssssjsz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramids-inscribed-in-a-cube/sssssjsz"/>
      <lastmod>2026-11-02T12:09:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/loan-instalment-table/sssssjs0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/loan-instalment-table/sssssjs0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/loan-instalment-table/sssssjs0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/loan-instalment-table/sssssjs0"/>
      <lastmod>2026-11-02T16:29:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/loan-instalment-table/sssssjs0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/loan-instalment-table/sssssjs0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/loan-instalment-table/sssssjs0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/loan-instalment-table/sssssjs0"/>
      <lastmod>2026-11-02T16:29:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplying-complex-numbers-2/sssssjsd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-complex-numbers-2/sssssjsd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-complex-numbers-2/sssssjsd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-complex-numbers-2/sssssjsd"/>
      <lastmod>2026-11-02T17:51:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplying-complex-numbers-2/sssssjsd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-complex-numbers-2/sssssjsd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-complex-numbers-2/sssssjsd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-complex-numbers-2/sssssjsd"/>
      <lastmod>2026-11-02T17:51:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pouring-liquid-into-cones-and-pyramids/sssssjsf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pouring-liquid-into-cones-and-pyramids/sssssjsf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pouring-liquid-into-cones-and-pyramids/sssssjsf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pouring-liquid-into-cones-and-pyramids/sssssjsf"/>
      <lastmod>2026-11-02T13:14:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pouring-liquid-into-cones-and-pyramids/sssssjsf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pouring-liquid-into-cones-and-pyramids/sssssjsf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pouring-liquid-into-cones-and-pyramids/sssssjsf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pouring-liquid-into-cones-and-pyramids/sssssjsf"/>
      <lastmod>2026-11-02T13:14:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spheres-cones-and-pyramids/sssssjs8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spheres-cones-and-pyramids/sssssjs8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spheres-cones-and-pyramids/sssssjs8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spheres-cones-and-pyramids/sssssjs8"/>
      <lastmod>2026-11-02T03:13:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spheres-cones-and-pyramids/sssssjs8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spheres-cones-and-pyramids/sssssjs8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spheres-cones-and-pyramids/sssssjs8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spheres-cones-and-pyramids/sssssjs8"/>
      <lastmod>2026-11-02T03:13:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ftc-integral-construction/sssssjsu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ftc-integral-construction/sssssjsu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ftc-integral-construction/sssssjsu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ftc-integral-construction/sssssjsu"/>
      <lastmod>2026-11-02T16:46:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ftc-integral-construction/sssssjsu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ftc-integral-construction/sssssjsu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ftc-integral-construction/sssssjsu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ftc-integral-construction/sssssjsu"/>
      <lastmod>2026-11-02T16:46:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-non-isosceles-and-isosceles-trapezoids/sssssjs5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-non-isosceles-and-isosceles-trapezoids/sssssjs5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-non-isosceles-and-isosceles-trapezoids/sssssjs5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-non-isosceles-and-isosceles-trapezoids/sssssjs5"/>
      <lastmod>2026-11-02T08:48:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-non-isosceles-and-isosceles-trapezoids/sssssjs5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-non-isosceles-and-isosceles-trapezoids/sssssjs5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-non-isosceles-and-isosceles-trapezoids/sssssjs5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-non-isosceles-and-isosceles-trapezoids/sssssjs5"/>
      <lastmod>2026-11-02T08:48:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-curves-vs-rectangular-equations/sssssjsb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-curves-vs-rectangular-equations/sssssjsb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-curves-vs-rectangular-equations/sssssjsb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-curves-vs-rectangular-equations/sssssjsb"/>
      <lastmod>2026-11-02T17:09:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-curves-vs-rectangular-equations/sssssjsb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-curves-vs-rectangular-equations/sssssjsb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-curves-vs-rectangular-equations/sssssjsb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-curves-vs-rectangular-equations/sssssjsb"/>
      <lastmod>2026-11-02T17:09:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-exterior-angle-activity/sssssjs3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-exterior-angle-activity/sssssjs3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-exterior-angle-activity/sssssjs3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-exterior-angle-activity/sssssjs3"/>
      <lastmod>2026-11-01T23:25:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-exterior-angle-activity/sssssjs3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-exterior-angle-activity/sssssjs3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-exterior-angle-activity/sssssjs3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-exterior-angle-activity/sssssjs3"/>
      <lastmod>2026-11-01T23:25:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/paper-folding-quadratic-equations-2/sssssjsq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/paper-folding-quadratic-equations-2/sssssjsq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/paper-folding-quadratic-equations-2/sssssjsq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/paper-folding-quadratic-equations-2/sssssjsq"/>
      <lastmod>2026-11-02T16:39:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/paper-folding-quadratic-equations-2/sssssjsq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/paper-folding-quadratic-equations-2/sssssjsq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/paper-folding-quadratic-equations-2/sssssjsq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/paper-folding-quadratic-equations-2/sssssjsq"/>
      <lastmod>2026-11-02T16:39:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-vocabulary/sssssjs1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-vocabulary/sssssjs1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-vocabulary/sssssjs1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-vocabulary/sssssjs1"/>
      <lastmod>2026-11-02T12:05:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-vocabulary/sssssjs1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-vocabulary/sssssjs1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-vocabulary/sssssjs1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-vocabulary/sssssjs1"/>
      <lastmod>2026-11-02T12:05:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/potter-s-wheel/sssssjsm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/potter-s-wheel/sssssjsm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/potter-s-wheel/sssssjsm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/potter-s-wheel/sssssjsm"/>
      <lastmod>2026-11-01T19:17:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/potter-s-wheel/sssssjsm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/potter-s-wheel/sssssjsm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/potter-s-wheel/sssssjsm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/potter-s-wheel/sssssjsm"/>
      <lastmod>2026-11-01T19:17:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-and-rotation/sssssjsj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-and-rotation/sssssjsj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-and-rotation/sssssjsj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-and-rotation/sssssjsj"/>
      <lastmod>2026-11-02T13:54:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-and-rotation/sssssjsj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-and-rotation/sssssjsj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-and-rotation/sssssjsj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-and-rotation/sssssjsj"/>
      <lastmod>2026-11-02T13:54:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angles-in-a-triangle/sssssjsp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-in-a-triangle/sssssjsp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-in-a-triangle/sssssjsp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-in-a-triangle/sssssjsp"/>
      <lastmod>2026-11-02T12:55:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angles-in-a-triangle/sssssjsp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-in-a-triangle/sssssjsp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-in-a-triangle/sssssjsp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-in-a-triangle/sssssjsp"/>
      <lastmod>2026-11-02T12:55:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/general-quadratic-equation-hyperbola-imaginary-roots/sssssjsw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/general-quadratic-equation-hyperbola-imaginary-roots/sssssjsw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/general-quadratic-equation-hyperbola-imaginary-roots/sssssjsw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/general-quadratic-equation-hyperbola-imaginary-roots/sssssjsw"/>
      <lastmod>2026-11-01T19:24:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/general-quadratic-equation-hyperbola-imaginary-roots/sssssjsw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/general-quadratic-equation-hyperbola-imaginary-roots/sssssjsw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/general-quadratic-equation-hyperbola-imaginary-roots/sssssjsw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/general-quadratic-equation-hyperbola-imaginary-roots/sssssjsw"/>
      <lastmod>2026-11-01T19:24:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/270-rotation-transformation-homework/sssssjs6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/270-rotation-transformation-homework/sssssjs6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/270-rotation-transformation-homework/sssssjs6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/270-rotation-transformation-homework/sssssjs6"/>
      <lastmod>2026-11-02T12:00:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/270-rotation-transformation-homework/sssssjs6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/270-rotation-transformation-homework/sssssjs6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/270-rotation-transformation-homework/sssssjs6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/270-rotation-transformation-homework/sssssjs6"/>
      <lastmod>2026-11-02T12:00:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integral-volume-demonstration/sssssjsg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integral-volume-demonstration/sssssjsg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integral-volume-demonstration/sssssjsg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integral-volume-demonstration/sssssjsg"/>
      <lastmod>2026-11-02T16:43:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integral-volume-demonstration/sssssjsg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integral-volume-demonstration/sssssjsg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integral-volume-demonstration/sssssjsg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integral-volume-demonstration/sssssjsg"/>
      <lastmod>2026-11-02T16:43:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logarithm-exploration/sssssjs9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithm-exploration/sssssjs9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithm-exploration/sssssjs9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithm-exploration/sssssjs9"/>
      <lastmod>2026-11-01T23:15:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logarithm-exploration/sssssjs9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithm-exploration/sssssjs9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithm-exploration/sssssjs9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithm-exploration/sssssjs9"/>
      <lastmod>2026-11-01T23:15:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-root-transformations/sssssjse</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-transformations/sssssjse"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-transformations/sssssjse"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-transformations/sssssjse"/>
      <lastmod>2026-11-02T17:17:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-root-transformations/sssssjse</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-transformations/sssssjse"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-transformations/sssssjse"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-transformations/sssssjse"/>
      <lastmod>2026-11-02T17:17:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vertex-coloring/sssssjsv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertex-coloring/sssssjsv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertex-coloring/sssssjsv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertex-coloring/sssssjsv"/>
      <lastmod>2026-11-01T23:33:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vertex-coloring/sssssjsv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertex-coloring/sssssjsv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertex-coloring/sssssjsv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertex-coloring/sssssjsv"/>
      <lastmod>2026-11-01T23:33:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-vectors-and-symmetry-in-equilateral-triangles/sssssjs4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-vectors-and-symmetry-in-equilateral-triangles/sssssjs4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-vectors-and-symmetry-in-equilateral-triangles/sssssjs4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-vectors-and-symmetry-in-equilateral-triangles/sssssjs4"/>
      <lastmod>2026-11-01T23:53:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-vectors-and-symmetry-in-equilateral-triangles/sssssjs4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-vectors-and-symmetry-in-equilateral-triangles/sssssjs4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-vectors-and-symmetry-in-equilateral-triangles/sssssjs4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-vectors-and-symmetry-in-equilateral-triangles/sssssjs4"/>
      <lastmod>2026-11-01T23:53:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volumes-of-revolution-washers-variable-axis/sssssjsl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-of-revolution-washers-variable-axis/sssssjsl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-of-revolution-washers-variable-axis/sssssjsl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-of-revolution-washers-variable-axis/sssssjsl"/>
      <lastmod>2026-11-01T23:28:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volumes-of-revolution-washers-variable-axis/sssssjsl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-of-revolution-washers-variable-axis/sssssjsl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-of-revolution-washers-variable-axis/sssssjsl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-of-revolution-washers-variable-axis/sssssjsl"/>
      <lastmod>2026-11-01T23:28:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/planes-in-space-problem-8/sssssjsy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planes-in-space-problem-8/sssssjsy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes-in-space-problem-8/sssssjsy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes-in-space-problem-8/sssssjsy"/>
      <lastmod>2026-11-02T11:06:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/planes-in-space-problem-8/sssssjsy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planes-in-space-problem-8/sssssjsy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes-in-space-problem-8/sssssjsy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes-in-space-problem-8/sssssjsy"/>
      <lastmod>2026-11-02T11:06:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflections-on-the-coordinate-plane/sssssjsa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-on-the-coordinate-plane/sssssjsa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-on-the-coordinate-plane/sssssjsa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-on-the-coordinate-plane/sssssjsa"/>
      <lastmod>2026-11-02T16:34:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflections-on-the-coordinate-plane/sssssjsa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-on-the-coordinate-plane/sssssjsa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-on-the-coordinate-plane/sssssjsa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-on-the-coordinate-plane/sssssjsa"/>
      <lastmod>2026-11-02T16:34:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/stock-market-math-modeling-im-7-5-17-lesson/sssssjsc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/stock-market-math-modeling-im-7-5-17-lesson/sssssjsc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/stock-market-math-modeling-im-7-5-17-lesson/sssssjsc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/stock-market-math-modeling-im-7-5-17-lesson/sssssjsc"/>
      <lastmod>2026-11-02T02:03:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/stock-market-math-modeling-im-7-5-17-lesson/sssssjsc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/stock-market-math-modeling-im-7-5-17-lesson/sssssjsc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/stock-market-math-modeling-im-7-5-17-lesson/sssssjsc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/stock-market-math-modeling-im-7-5-17-lesson/sssssjsc"/>
      <lastmod>2026-11-02T02:03:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezium-area-calculation-by-karis/sssssjsr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-area-calculation-by-karis/sssssjsr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-area-calculation-by-karis/sssssjsr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-area-calculation-by-karis/sssssjsr"/>
      <lastmod>2026-11-02T08:42:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezium-area-calculation-by-karis/sssssjsr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-area-calculation-by-karis/sssssjsr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-area-calculation-by-karis/sssssjsr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-area-calculation-by-karis/sssssjsr"/>
      <lastmod>2026-11-02T08:42:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-angles-in-quadrilaterals-via-rotation-and-intersections/sssssjsh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-angles-in-quadrilaterals-via-rotation-and-intersections/sssssjsh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-angles-in-quadrilaterals-via-rotation-and-intersections/sssssjsh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-angles-in-quadrilaterals-via-rotation-and-intersections/sssssjsh"/>
      <lastmod>2026-11-02T09:47:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-angles-in-quadrilaterals-via-rotation-and-intersections/sssssjsh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-angles-in-quadrilaterals-via-rotation-and-intersections/sssssjsh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-angles-in-quadrilaterals-via-rotation-and-intersections/sssssjsh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-angles-in-quadrilaterals-via-rotation-and-intersections/sssssjsh"/>
      <lastmod>2026-11-02T09:47:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-construction-by-doug-carragher/sssssjst</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-doug-carragher/sssssjst"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-by-doug-carragher/sssssjst"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-doug-carragher/sssssjst"/>
      <lastmod>2026-11-02T13:38:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-construction-by-doug-carragher/sssssjst</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-doug-carragher/sssssjst"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-by-doug-carragher/sssssjst"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-doug-carragher/sssssjst"/>
      <lastmod>2026-11-02T13:38:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilate-a-cylinder-about-the-center-of-its-base/sssssjsx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilate-a-cylinder-about-the-center-of-its-base/sssssjsx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilate-a-cylinder-about-the-center-of-its-base/sssssjsx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilate-a-cylinder-about-the-center-of-its-base/sssssjsx"/>
      <lastmod>2026-11-01T22:12:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilate-a-cylinder-about-the-center-of-its-base/sssssjsx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilate-a-cylinder-about-the-center-of-its-base/sssssjsx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilate-a-cylinder-about-the-center-of-its-base/sssssjsx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilate-a-cylinder-about-the-center-of-its-base/sssssjsx"/>
      <lastmod>2026-11-01T22:12:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bases-and-fractions/sssssjsi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bases-and-fractions/sssssjsi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bases-and-fractions/sssssjsi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bases-and-fractions/sssssjsi"/>
      <lastmod>2026-11-02T18:00:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bases-and-fractions/sssssjsi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bases-and-fractions/sssssjsi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bases-and-fractions/sssssjsi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bases-and-fractions/sssssjsi"/>
      <lastmod>2026-11-02T18:00:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hypothesis-testing-demo/sssssjso</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hypothesis-testing-demo/sssssjso"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hypothesis-testing-demo/sssssjso"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hypothesis-testing-demo/sssssjso"/>
      <lastmod>2026-11-02T00:20:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hypothesis-testing-demo/sssssjso</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hypothesis-testing-demo/sssssjso"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hypothesis-testing-demo/sssssjso"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hypothesis-testing-demo/sssssjso"/>
      <lastmod>2026-11-02T00:20:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-pyramid-model/sssssj7s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-pyramid-model/sssssj7s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-pyramid-model/sssssj7s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-pyramid-model/sssssj7s"/>
      <lastmod>2026-11-02T03:05:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-pyramid-model/sssssj7s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-pyramid-model/sssssj7s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-pyramid-model/sssssj7s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-pyramid-model/sssssj7s"/>
      <lastmod>2026-11-02T03:05:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/evaluating-functions-graphically/sssssj77</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/evaluating-functions-graphically/sssssj77"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/evaluating-functions-graphically/sssssj77"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/evaluating-functions-graphically/sssssj77"/>
      <lastmod>2026-11-01T21:18:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/evaluating-functions-graphically/sssssj77</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/evaluating-functions-graphically/sssssj77"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/evaluating-functions-graphically/sssssj77"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/evaluating-functions-graphically/sssssj77"/>
      <lastmod>2026-11-01T21:18:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-constructions-10-17/sssssj7n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-constructions-10-17/sssssj7n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-constructions-10-17/sssssj7n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-constructions-10-17/sssssj7n"/>
      <lastmod>2026-11-02T18:19:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-constructions-10-17/sssssj7n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-constructions-10-17/sssssj7n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-constructions-10-17/sssssj7n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-constructions-10-17/sssssj7n"/>
      <lastmod>2026-11-02T18:19:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-equations-and-quantities-a-full-lesson/sssssj72</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-and-quantities-a-full-lesson/sssssj72"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-and-quantities-a-full-lesson/sssssj72"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-and-quantities-a-full-lesson/sssssj72"/>
      <lastmod>2026-11-01T23:53:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-equations-and-quantities-a-full-lesson/sssssj72</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-and-quantities-a-full-lesson/sssssj72"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-and-quantities-a-full-lesson/sssssj72"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-and-quantities-a-full-lesson/sssssj72"/>
      <lastmod>2026-11-01T23:53:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-property-3-demonstration/sssssj7k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-property-3-demonstration/sssssj7k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-property-3-demonstration/sssssj7k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-property-3-demonstration/sssssj7k"/>
      <lastmod>2026-11-01T21:38:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-property-3-demonstration/sssssj7k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-property-3-demonstration/sssssj7k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-property-3-demonstration/sssssj7k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-property-3-demonstration/sssssj7k"/>
      <lastmod>2026-11-01T21:38:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exercise-5-integrated-exploration-of-random-triangles-geometric-mean-and-more/sssssj7z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-5-integrated-exploration-of-random-triangles-geometric-mean-and-more/sssssj7z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-5-integrated-exploration-of-random-triangles-geometric-mean-and-more/sssssj7z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-5-integrated-exploration-of-random-triangles-geometric-mean-and-more/sssssj7z"/>
      <lastmod>2026-11-02T10:51:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exercise-5-integrated-exploration-of-random-triangles-geometric-mean-and-more/sssssj7z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-5-integrated-exploration-of-random-triangles-geometric-mean-and-more/sssssj7z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-5-integrated-exploration-of-random-triangles-geometric-mean-and-more/sssssj7z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-5-integrated-exploration-of-random-triangles-geometric-mean-and-more/sssssj7z"/>
      <lastmod>2026-11-02T10:51:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/game-on-gradients-of-straight-lines/sssssj70</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/game-on-gradients-of-straight-lines/sssssj70"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/game-on-gradients-of-straight-lines/sssssj70"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/game-on-gradients-of-straight-lines/sssssj70"/>
      <lastmod>2026-11-02T02:36:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/game-on-gradients-of-straight-lines/sssssj70</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/game-on-gradients-of-straight-lines/sssssj70"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/game-on-gradients-of-straight-lines/sssssj70"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/game-on-gradients-of-straight-lines/sssssj70"/>
      <lastmod>2026-11-02T02:36:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/using-geogebra-for-statistics/sssssj7d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-geogebra-for-statistics/sssssj7d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-geogebra-for-statistics/sssssj7d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-geogebra-for-statistics/sssssj7d"/>
      <lastmod>2026-11-02T16:58:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/using-geogebra-for-statistics/sssssj7d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-geogebra-for-statistics/sssssj7d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-geogebra-for-statistics/sssssj7d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-geogebra-for-statistics/sssssj7d"/>
      <lastmod>2026-11-02T16:58:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/differential-equations-with-separable-variables/sssssj7f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/differential-equations-with-separable-variables/sssssj7f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/differential-equations-with-separable-variables/sssssj7f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/differential-equations-with-separable-variables/sssssj7f"/>
      <lastmod>2026-11-01T21:29:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/differential-equations-with-separable-variables/sssssj7f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/differential-equations-with-separable-variables/sssssj7f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/differential-equations-with-separable-variables/sssssj7f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/differential-equations-with-separable-variables/sssssj7f"/>
      <lastmod>2026-11-01T21:29:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/understanding-the-volume-of-rectangular-prisms/sssssj78</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/understanding-the-volume-of-rectangular-prisms/sssssj78"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/understanding-the-volume-of-rectangular-prisms/sssssj78"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/understanding-the-volume-of-rectangular-prisms/sssssj78"/>
      <lastmod>2026-11-02T18:58:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/understanding-the-volume-of-rectangular-prisms/sssssj78</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/understanding-the-volume-of-rectangular-prisms/sssssj78"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/understanding-the-volume-of-rectangular-prisms/sssssj78"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/understanding-the-volume-of-rectangular-prisms/sssssj78"/>
      <lastmod>2026-11-02T18:58:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/expressions-with-rational-numbers/sssssj7u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/expressions-with-rational-numbers/sssssj7u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/expressions-with-rational-numbers/sssssj7u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/expressions-with-rational-numbers/sssssj7u"/>
      <lastmod>2026-11-01T20:19:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/expressions-with-rational-numbers/sssssj7u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/expressions-with-rational-numbers/sssssj7u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/expressions-with-rational-numbers/sssssj7u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/expressions-with-rational-numbers/sssssj7u"/>
      <lastmod>2026-11-01T20:19:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/select-the-region/sssssj75</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/select-the-region/sssssj75"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/select-the-region/sssssj75"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/select-the-region/sssssj75"/>
      <lastmod>2026-11-01T20:59:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/select-the-region/sssssj75</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/select-the-region/sssssj75"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/select-the-region/sssssj75"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/select-the-region/sssssj75"/>
      <lastmod>2026-11-01T20:59:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-a-trapezoid-dynamic-construction-and-derivation/sssssj7b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-trapezoid-dynamic-construction-and-derivation/sssssj7b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-trapezoid-dynamic-construction-and-derivation/sssssj7b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-trapezoid-dynamic-construction-and-derivation/sssssj7b"/>
      <lastmod>2026-11-02T03:12:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-a-trapezoid-dynamic-construction-and-derivation/sssssj7b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-trapezoid-dynamic-construction-and-derivation/sssssj7b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-trapezoid-dynamic-construction-and-derivation/sssssj7b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-trapezoid-dynamic-construction-and-derivation/sssssj7b"/>
      <lastmod>2026-11-02T03:12:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fitting-a-root-function/sssssj73</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fitting-a-root-function/sssssj73"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fitting-a-root-function/sssssj73"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fitting-a-root-function/sssssj73"/>
      <lastmod>2026-11-01T23:59:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fitting-a-root-function/sssssj73</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fitting-a-root-function/sssssj73"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fitting-a-root-function/sssssj73"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fitting-a-root-function/sssssj73"/>
      <lastmod>2026-11-01T23:59:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-pairs-with-parallel-lines/sssssj7q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-pairs-with-parallel-lines/sssssj7q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-pairs-with-parallel-lines/sssssj7q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-pairs-with-parallel-lines/sssssj7q"/>
      <lastmod>2026-11-01T23:58:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-pairs-with-parallel-lines/sssssj7q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-pairs-with-parallel-lines/sssssj7q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-pairs-with-parallel-lines/sssssj7q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-pairs-with-parallel-lines/sssssj7q"/>
      <lastmod>2026-11-01T23:58:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-definite-integral-visualizing-area-and-summation/sssssj71</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-definite-integral-visualizing-area-and-summation/sssssj71"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-definite-integral-visualizing-area-and-summation/sssssj71"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-definite-integral-visualizing-area-and-summation/sssssj71"/>
      <lastmod>2026-11-01T20:48:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-definite-integral-visualizing-area-and-summation/sssssj71</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-definite-integral-visualizing-area-and-summation/sssssj71"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-definite-integral-visualizing-area-and-summation/sssssj71"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-definite-integral-visualizing-area-and-summation/sssssj71"/>
      <lastmod>2026-11-01T20:48:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/copy-a-segment/sssssj7m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copy-a-segment/sssssj7m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copy-a-segment/sssssj7m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copy-a-segment/sssssj7m"/>
      <lastmod>2026-11-01T23:12:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/copy-a-segment/sssssj7m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copy-a-segment/sssssj7m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copy-a-segment/sssssj7m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copy-a-segment/sssssj7m"/>
      <lastmod>2026-11-01T23:12:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/distance-between-two-points-by-rv-smath/sssssj7j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-between-two-points-by-rv-smath/sssssj7j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-between-two-points-by-rv-smath/sssssj7j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-between-two-points-by-rv-smath/sssssj7j"/>
      <lastmod>2026-11-02T00:29:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/distance-between-two-points-by-rv-smath/sssssj7j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-between-two-points-by-rv-smath/sssssj7j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-between-two-points-by-rv-smath/sssssj7j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-between-two-points-by-rv-smath/sssssj7j"/>
      <lastmod>2026-11-02T00:29:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/number-of-diagonals-in-a-convex-polygon/sssssj7p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-of-diagonals-in-a-convex-polygon/sssssj7p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-of-diagonals-in-a-convex-polygon/sssssj7p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-of-diagonals-in-a-convex-polygon/sssssj7p"/>
      <lastmod>2026-11-02T02:26:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/number-of-diagonals-in-a-convex-polygon/sssssj7p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-of-diagonals-in-a-convex-polygon/sssssj7p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-of-diagonals-in-a-convex-polygon/sssssj7p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-of-diagonals-in-a-convex-polygon/sssssj7p"/>
      <lastmod>2026-11-02T02:26:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construct-congruent-angles-by-shawnna-breach/sssssj7w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-congruent-angles-by-shawnna-breach/sssssj7w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-congruent-angles-by-shawnna-breach/sssssj7w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-congruent-angles-by-shawnna-breach/sssssj7w"/>
      <lastmod>2026-11-02T13:48:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construct-congruent-angles-by-shawnna-breach/sssssj7w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-congruent-angles-by-shawnna-breach/sssssj7w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-congruent-angles-by-shawnna-breach/sssssj7w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-congruent-angles-by-shawnna-breach/sssssj7w"/>
      <lastmod>2026-11-02T13:48:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sliding-point-and-line-coefficient-changes-by-tiffany-stellhorn-2/sssssj76</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sliding-point-and-line-coefficient-changes-by-tiffany-stellhorn-2/sssssj76"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sliding-point-and-line-coefficient-changes-by-tiffany-stellhorn-2/sssssj76"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sliding-point-and-line-coefficient-changes-by-tiffany-stellhorn-2/sssssj76"/>
      <lastmod>2026-11-02T17:38:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sliding-point-and-line-coefficient-changes-by-tiffany-stellhorn-2/sssssj76</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sliding-point-and-line-coefficient-changes-by-tiffany-stellhorn-2/sssssj76"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sliding-point-and-line-coefficient-changes-by-tiffany-stellhorn-2/sssssj76"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sliding-point-and-line-coefficient-changes-by-tiffany-stellhorn-2/sssssj76"/>
      <lastmod>2026-11-02T17:38:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-coefficients-in-equivalent-polynomials/sssssj7g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-coefficients-in-equivalent-polynomials/sssssj7g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-coefficients-in-equivalent-polynomials/sssssj7g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-coefficients-in-equivalent-polynomials/sssssj7g"/>
      <lastmod>2026-11-01T19:14:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-coefficients-in-equivalent-polynomials/sssssj7g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-coefficients-in-equivalent-polynomials/sssssj7g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-coefficients-in-equivalent-polynomials/sssssj7g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-coefficients-in-equivalent-polynomials/sssssj7g"/>
      <lastmod>2026-11-01T19:14:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/open-intro-week-1-treating-chronic-fatigue-syndrome/sssssj79</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/open-intro-week-1-treating-chronic-fatigue-syndrome/sssssj79"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/open-intro-week-1-treating-chronic-fatigue-syndrome/sssssj79"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/open-intro-week-1-treating-chronic-fatigue-syndrome/sssssj79"/>
      <lastmod>2026-11-01T19:35:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/open-intro-week-1-treating-chronic-fatigue-syndrome/sssssj79</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/open-intro-week-1-treating-chronic-fatigue-syndrome/sssssj79"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/open-intro-week-1-treating-chronic-fatigue-syndrome/sssssj79"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/open-intro-week-1-treating-chronic-fatigue-syndrome/sssssj79"/>
      <lastmod>2026-11-01T19:35:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/converting-improper-fractions-to-mixed-numbers/sssssj7e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/converting-improper-fractions-to-mixed-numbers/sssssj7e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/converting-improper-fractions-to-mixed-numbers/sssssj7e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/converting-improper-fractions-to-mixed-numbers/sssssj7e"/>
      <lastmod>2026-11-02T18:51:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/converting-improper-fractions-to-mixed-numbers/sssssj7e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/converting-improper-fractions-to-mixed-numbers/sssssj7e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/converting-improper-fractions-to-mixed-numbers/sssssj7e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/converting-improper-fractions-to-mixed-numbers/sssssj7e"/>
      <lastmod>2026-11-02T18:51:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/compare-normal-binomial-distributions/sssssj7v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-normal-binomial-distributions/sssssj7v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-normal-binomial-distributions/sssssj7v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-normal-binomial-distributions/sssssj7v"/>
      <lastmod>2026-11-02T00:21:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/compare-normal-binomial-distributions/sssssj7v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-normal-binomial-distributions/sssssj7v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-normal-binomial-distributions/sssssj7v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-normal-binomial-distributions/sssssj7v"/>
      <lastmod>2026-11-02T00:21:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-subtraction-demonstration-by-venkuchimal/sssssj74</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-subtraction-demonstration-by-venkuchimal/sssssj74"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-subtraction-demonstration-by-venkuchimal/sssssj74"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-subtraction-demonstration-by-venkuchimal/sssssj74"/>
      <lastmod>2026-11-02T13:35:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-subtraction-demonstration-by-venkuchimal/sssssj74</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-subtraction-demonstration-by-venkuchimal/sssssj74"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-subtraction-demonstration-by-venkuchimal/sssssj74"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-subtraction-demonstration-by-venkuchimal/sssssj74"/>
      <lastmod>2026-11-02T13:35:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-7-5-5-practice-representing-subtraction/sssssj7l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-5-5-practice-representing-subtraction/sssssj7l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-5-5-practice-representing-subtraction/sssssj7l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-5-5-practice-representing-subtraction/sssssj7l"/>
      <lastmod>2026-11-01T20:19:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-7-5-5-practice-representing-subtraction/sssssj7l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-5-5-practice-representing-subtraction/sssssj7l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-5-5-practice-representing-subtraction/sssssj7l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-5-5-practice-representing-subtraction/sssssj7l"/>
      <lastmod>2026-11-01T20:19:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circumcircle-and-quadrilateral-animation/sssssj7y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumcircle-and-quadrilateral-animation/sssssj7y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumcircle-and-quadrilateral-animation/sssssj7y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumcircle-and-quadrilateral-animation/sssssj7y"/>
      <lastmod>2026-11-02T17:15:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circumcircle-and-quadrilateral-animation/sssssj7y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumcircle-and-quadrilateral-animation/sssssj7y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumcircle-and-quadrilateral-animation/sssssj7y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumcircle-and-quadrilateral-animation/sssssj7y"/>
      <lastmod>2026-11-02T17:15:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/chrysanthemum-curve/sssssj7a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chrysanthemum-curve/sssssj7a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chrysanthemum-curve/sssssj7a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chrysanthemum-curve/sssssj7a"/>
      <lastmod>2026-11-01T21:02:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/chrysanthemum-curve/sssssj7a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chrysanthemum-curve/sssssj7a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chrysanthemum-curve/sssssj7a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chrysanthemum-curve/sssssj7a"/>
      <lastmod>2026-11-01T21:02:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/5-forces-and-friction-page-102/sssssj7c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/5-forces-and-friction-page-102/sssssj7c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/5-forces-and-friction-page-102/sssssj7c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/5-forces-and-friction-page-102/sssssj7c"/>
      <lastmod>2026-11-02T00:41:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/5-forces-and-friction-page-102/sssssj7c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/5-forces-and-friction-page-102/sssssj7c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/5-forces-and-friction-page-102/sssssj7c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/5-forces-and-friction-page-102/sssssj7c"/>
      <lastmod>2026-11-02T00:41:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-rotation-with-complex-numbers/sssssj7r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-rotation-with-complex-numbers/sssssj7r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-rotation-with-complex-numbers/sssssj7r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-rotation-with-complex-numbers/sssssj7r"/>
      <lastmod>2026-11-01T19:25:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-rotation-with-complex-numbers/sssssj7r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-rotation-with-complex-numbers/sssssj7r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-rotation-with-complex-numbers/sssssj7r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-rotation-with-complex-numbers/sssssj7r"/>
      <lastmod>2026-11-01T19:25:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/line-and-vector/sssssj7h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-and-vector/sssssj7h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-and-vector/sssssj7h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-and-vector/sssssj7h"/>
      <lastmod>2026-11-01T19:28:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/line-and-vector/sssssj7h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-and-vector/sssssj7h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-and-vector/sssssj7h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-and-vector/sssssj7h"/>
      <lastmod>2026-11-01T19:28:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/whole-number-comparison/sssssj7t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/whole-number-comparison/sssssj7t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/whole-number-comparison/sssssj7t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/whole-number-comparison/sssssj7t"/>
      <lastmod>2026-11-01T21:54:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/whole-number-comparison/sssssj7t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/whole-number-comparison/sssssj7t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/whole-number-comparison/sssssj7t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/whole-number-comparison/sssssj7t"/>
      <lastmod>2026-11-01T21:54:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plotting-polar-functions/sssssj7x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-polar-functions/sssssj7x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-polar-functions/sssssj7x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-polar-functions/sssssj7x"/>
      <lastmod>2026-11-01T19:28:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plotting-polar-functions/sssssj7x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-polar-functions/sssssj7x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-polar-functions/sssssj7x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-polar-functions/sssssj7x"/>
      <lastmod>2026-11-01T19:28:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/relative-position-of-two-spheres-intersection-tangency-and-separation/sssssj7i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relative-position-of-two-spheres-intersection-tangency-and-separation/sssssj7i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relative-position-of-two-spheres-intersection-tangency-and-separation/sssssj7i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relative-position-of-two-spheres-intersection-tangency-and-separation/sssssj7i"/>
      <lastmod>2026-11-02T18:42:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/relative-position-of-two-spheres-intersection-tangency-and-separation/sssssj7i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relative-position-of-two-spheres-intersection-tangency-and-separation/sssssj7i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relative-position-of-two-spheres-intersection-tangency-and-separation/sssssj7i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relative-position-of-two-spheres-intersection-tangency-and-separation/sssssj7i"/>
      <lastmod>2026-11-02T18:42:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-animation-demo/sssssj7o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-animation-demo/sssssj7o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-animation-demo/sssssj7o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-animation-demo/sssssj7o"/>
      <lastmod>2026-11-01T21:33:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-animation-demo/sssssj7o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-animation-demo/sssssj7o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-animation-demo/sssssj7o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-animation-demo/sssssj7o"/>
      <lastmod>2026-11-01T21:33:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animating-ellipses/sssssjns</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animating-ellipses/sssssjns"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animating-ellipses/sssssjns"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animating-ellipses/sssssjns"/>
      <lastmod>2026-11-01T22:01:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animating-ellipses/sssssjns</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animating-ellipses/sssssjns"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animating-ellipses/sssssjns"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animating-ellipses/sssssjns"/>
      <lastmod>2026-11-01T22:01:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-benjaminpetersmith/sssssjn7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-benjaminpetersmith/sssssjn7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-benjaminpetersmith/sssssjn7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-benjaminpetersmith/sssssjn7"/>
      <lastmod>2026-11-02T09:29:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-benjaminpetersmith/sssssjn7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-benjaminpetersmith/sssssjn7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-benjaminpetersmith/sssssjn7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-benjaminpetersmith/sssssjn7"/>
      <lastmod>2026-11-02T09:29:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/determinant-calculation-demo/sssssjnn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/determinant-calculation-demo/sssssjnn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/determinant-calculation-demo/sssssjnn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/determinant-calculation-demo/sssssjnn"/>
      <lastmod>2026-11-02T09:40:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/determinant-calculation-demo/sssssjnn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/determinant-calculation-demo/sssssjnn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/determinant-calculation-demo/sssssjnn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/determinant-calculation-demo/sssssjnn"/>
      <lastmod>2026-11-02T09:40:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-anatomy-exploring-cone-geometry/sssssjn2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-anatomy-exploring-cone-geometry/sssssjn2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-anatomy-exploring-cone-geometry/sssssjn2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-anatomy-exploring-cone-geometry/sssssjn2"/>
      <lastmod>2026-11-02T02:50:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-anatomy-exploring-cone-geometry/sssssjn2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-anatomy-exploring-cone-geometry/sssssjn2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-anatomy-exploring-cone-geometry/sssssjn2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-anatomy-exploring-cone-geometry/sssssjn2"/>
      <lastmod>2026-11-02T02:50:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tg-consistency-of-linear-equations-coincident-lines/sssssjnk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tg-consistency-of-linear-equations-coincident-lines/sssssjnk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tg-consistency-of-linear-equations-coincident-lines/sssssjnk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tg-consistency-of-linear-equations-coincident-lines/sssssjnk"/>
      <lastmod>2026-11-02T00:13:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tg-consistency-of-linear-equations-coincident-lines/sssssjnk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tg-consistency-of-linear-equations-coincident-lines/sssssjnk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tg-consistency-of-linear-equations-coincident-lines/sssssjnk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tg-consistency-of-linear-equations-coincident-lines/sssssjnk"/>
      <lastmod>2026-11-02T00:13:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pdst-ellipse-locus-demonstration/sssssjnz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pdst-ellipse-locus-demonstration/sssssjnz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pdst-ellipse-locus-demonstration/sssssjnz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pdst-ellipse-locus-demonstration/sssssjnz"/>
      <lastmod>2026-11-01T23:46:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pdst-ellipse-locus-demonstration/sssssjnz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pdst-ellipse-locus-demonstration/sssssjnz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pdst-ellipse-locus-demonstration/sssssjnz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pdst-ellipse-locus-demonstration/sssssjnz"/>
      <lastmod>2026-11-01T23:46:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivatives-secants-tangents/sssssjn0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivatives-secants-tangents/sssssjn0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivatives-secants-tangents/sssssjn0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivatives-secants-tangents/sssssjn0"/>
      <lastmod>2026-11-02T18:14:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivatives-secants-tangents/sssssjn0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivatives-secants-tangents/sssssjn0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivatives-secants-tangents/sssssjn0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivatives-secants-tangents/sssssjn0"/>
      <lastmod>2026-11-02T18:14:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/decomposing-proper-fractions/sssssjnd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decomposing-proper-fractions/sssssjnd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decomposing-proper-fractions/sssssjnd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decomposing-proper-fractions/sssssjnd"/>
      <lastmod>2026-11-02T13:37:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/decomposing-proper-fractions/sssssjnd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decomposing-proper-fractions/sssssjnd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decomposing-proper-fractions/sssssjnd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decomposing-proper-fractions/sssssjnd"/>
      <lastmod>2026-11-02T13:37:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kidney-shape/sssssjnf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kidney-shape/sssssjnf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kidney-shape/sssssjnf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kidney-shape/sssssjnf"/>
      <lastmod>2026-11-02T16:33:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kidney-shape/sssssjnf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kidney-shape/sssssjnf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kidney-shape/sssssjnf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kidney-shape/sssssjnf"/>
      <lastmod>2026-11-02T16:33:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-calculator-by-yagub/sssssjn8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-calculator-by-yagub/sssssjn8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-calculator-by-yagub/sssssjn8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-calculator-by-yagub/sssssjn8"/>
      <lastmod>2026-11-02T02:52:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-calculator-by-yagub/sssssjn8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-calculator-by-yagub/sssssjn8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-calculator-by-yagub/sssssjn8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-calculator-by-yagub/sssssjn8"/>
      <lastmod>2026-11-02T02:52:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-volume-calculation/sssssjnu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-volume-calculation/sssssjnu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-volume-calculation/sssssjnu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-volume-calculation/sssssjnu"/>
      <lastmod>2026-11-02T00:08:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-volume-calculation/sssssjnu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-volume-calculation/sssssjnu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-volume-calculation/sssssjnu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-volume-calculation/sssssjnu"/>
      <lastmod>2026-11-02T00:08:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-functions-with-automatic-scaling/sssssjn5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-functions-with-automatic-scaling/sssssjn5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-functions-with-automatic-scaling/sssssjn5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-functions-with-automatic-scaling/sssssjn5"/>
      <lastmod>2026-11-01T21:38:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-functions-with-automatic-scaling/sssssjn5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-functions-with-automatic-scaling/sssssjn5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-functions-with-automatic-scaling/sssssjn5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-functions-with-automatic-scaling/sssssjn5"/>
      <lastmod>2026-11-01T21:38:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/funicular-by-two-points/sssssjnb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/funicular-by-two-points/sssssjnb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/funicular-by-two-points/sssssjnb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/funicular-by-two-points/sssssjnb"/>
      <lastmod>2026-11-01T21:24:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/funicular-by-two-points/sssssjnb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/funicular-by-two-points/sssssjnb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/funicular-by-two-points/sssssjnb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/funicular-by-two-points/sssssjnb"/>
      <lastmod>2026-11-01T21:24:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spiral-george-b/sssssjn3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-george-b/sssssjn3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-george-b/sssssjn3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-george-b/sssssjn3"/>
      <lastmod>2026-11-01T22:04:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spiral-george-b/sssssjn3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-george-b/sssssjn3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-george-b/sssssjn3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-george-b/sssssjn3"/>
      <lastmod>2026-11-01T22:04:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/investigate-logarithmic-function-by-parameters/sssssjnq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigate-logarithmic-function-by-parameters/sssssjnq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigate-logarithmic-function-by-parameters/sssssjnq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigate-logarithmic-function-by-parameters/sssssjnq"/>
      <lastmod>2026-11-02T17:46:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/investigate-logarithmic-function-by-parameters/sssssjnq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigate-logarithmic-function-by-parameters/sssssjnq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigate-logarithmic-function-by-parameters/sssssjnq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigate-logarithmic-function-by-parameters/sssssjnq"/>
      <lastmod>2026-11-02T17:46:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-example-by-megan-milano/sssssjn1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-example-by-megan-milano/sssssjn1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-example-by-megan-milano/sssssjn1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-example-by-megan-milano/sssssjn1"/>
      <lastmod>2026-11-02T09:06:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-example-by-megan-milano/sssssjn1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-example-by-megan-milano/sssssjn1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-example-by-megan-milano/sssssjn1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-example-by-megan-milano/sssssjn1"/>
      <lastmod>2026-11-02T09:06:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/optimization-geometric-construction/sssssjnm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/optimization-geometric-construction/sssssjnm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/optimization-geometric-construction/sssssjnm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/optimization-geometric-construction/sssssjnm"/>
      <lastmod>2026-11-02T18:51:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/optimization-geometric-construction/sssssjnm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/optimization-geometric-construction/sssssjnm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/optimization-geometric-construction/sssssjnm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/optimization-geometric-construction/sssssjnm"/>
      <lastmod>2026-11-02T18:51:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/center-of-rotation-demo/sssssjnj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/center-of-rotation-demo/sssssjnj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/center-of-rotation-demo/sssssjnj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/center-of-rotation-demo/sssssjnj"/>
      <lastmod>2026-11-02T17:15:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/center-of-rotation-demo/sssssjnj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/center-of-rotation-demo/sssssjnj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/center-of-rotation-demo/sssssjnj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/center-of-rotation-demo/sssssjnj"/>
      <lastmod>2026-11-02T17:15:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-root-spiral-animation/sssssjnp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-spiral-animation/sssssjnp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-spiral-animation/sssssjnp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-spiral-animation/sssssjnp"/>
      <lastmod>2026-11-02T17:09:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-root-spiral-animation/sssssjnp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-spiral-animation/sssssjnp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-spiral-animation/sssssjnp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-spiral-animation/sssssjnp"/>
      <lastmod>2026-11-02T17:09:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-wave-and-unit-circle/sssssjnw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-wave-and-unit-circle/sssssjnw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-wave-and-unit-circle/sssssjnw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-wave-and-unit-circle/sssssjnw"/>
      <lastmod>2026-11-02T17:01:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-wave-and-unit-circle/sssssjnw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-wave-and-unit-circle/sssssjnw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-wave-and-unit-circle/sssssjnw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-wave-and-unit-circle/sssssjnw"/>
      <lastmod>2026-11-02T17:01:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-two-planes-in-a-prism/sssssjn6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-two-planes-in-a-prism/sssssjn6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-two-planes-in-a-prism/sssssjn6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-two-planes-in-a-prism/sssssjn6"/>
      <lastmod>2026-11-02T09:07:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-two-planes-in-a-prism/sssssjn6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-two-planes-in-a-prism/sssssjn6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-two-planes-in-a-prism/sssssjn6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-two-planes-in-a-prism/sssssjn6"/>
      <lastmod>2026-11-02T09:07:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-model-for-dividing-multi-digit-numbers/sssssjng</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-model-for-dividing-multi-digit-numbers/sssssjng"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-model-for-dividing-multi-digit-numbers/sssssjng"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-model-for-dividing-multi-digit-numbers/sssssjng"/>
      <lastmod>2026-11-02T00:48:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-model-for-dividing-multi-digit-numbers/sssssjng</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-model-for-dividing-multi-digit-numbers/sssssjng"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-model-for-dividing-multi-digit-numbers/sssssjng"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-model-for-dividing-multi-digit-numbers/sssssjng"/>
      <lastmod>2026-11-02T00:48:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construct-triangles-with-variable-sides/sssssjn9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-triangles-with-variable-sides/sssssjn9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-triangles-with-variable-sides/sssssjn9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-triangles-with-variable-sides/sssssjn9"/>
      <lastmod>2026-11-01T20:41:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construct-triangles-with-variable-sides/sssssjn9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-triangles-with-variable-sides/sssssjn9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-triangles-with-variable-sides/sssssjn9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-triangles-with-variable-sides/sssssjn9"/>
      <lastmod>2026-11-01T20:41:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-and-linear-equations-math-puzzle/sssssjne</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-and-linear-equations-math-puzzle/sssssjne"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-and-linear-equations-math-puzzle/sssssjne"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-and-linear-equations-math-puzzle/sssssjne"/>
      <lastmod>2026-11-02T12:27:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-and-linear-equations-math-puzzle/sssssjne</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-and-linear-equations-math-puzzle/sssssjne"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-and-linear-equations-math-puzzle/sssssjne"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-and-linear-equations-math-puzzle/sssssjne"/>
      <lastmod>2026-11-02T12:27:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unfolding-the-curved-surface-of-a-cone/sssssjnv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unfolding-the-curved-surface-of-a-cone/sssssjnv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unfolding-the-curved-surface-of-a-cone/sssssjnv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unfolding-the-curved-surface-of-a-cone/sssssjnv"/>
      <lastmod>2026-11-02T17:44:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unfolding-the-curved-surface-of-a-cone/sssssjnv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unfolding-the-curved-surface-of-a-cone/sssssjnv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unfolding-the-curved-surface-of-a-cone/sssssjnv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unfolding-the-curved-surface-of-a-cone/sssssjnv"/>
      <lastmod>2026-11-02T17:44:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/2d-vectors-and-geometric-construction/sssssjn4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-vectors-and-geometric-construction/sssssjn4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-vectors-and-geometric-construction/sssssjn4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-vectors-and-geometric-construction/sssssjn4"/>
      <lastmod>2026-11-01T19:34:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/2d-vectors-and-geometric-construction/sssssjn4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-vectors-and-geometric-construction/sssssjn4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-vectors-and-geometric-construction/sssssjn4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-vectors-and-geometric-construction/sssssjn4"/>
      <lastmod>2026-11-01T19:34:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/curved-surface-area-of-cones-by-mark-willis/sssssjnl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curved-surface-area-of-cones-by-mark-willis/sssssjnl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curved-surface-area-of-cones-by-mark-willis/sssssjnl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curved-surface-area-of-cones-by-mark-willis/sssssjnl"/>
      <lastmod>2026-11-02T18:53:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/curved-surface-area-of-cones-by-mark-willis/sssssjnl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curved-surface-area-of-cones-by-mark-willis/sssssjnl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curved-surface-area-of-cones-by-mark-willis/sssssjnl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curved-surface-area-of-cones-by-mark-willis/sssssjnl"/>
      <lastmod>2026-11-02T18:53:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/special-parallelograms/sssssjny</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-parallelograms/sssssjny"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-parallelograms/sssssjny"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-parallelograms/sssssjny"/>
      <lastmod>2026-11-02T17:49:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/special-parallelograms/sssssjny</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-parallelograms/sssssjny"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-parallelograms/sssssjny"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-parallelograms/sssssjny"/>
      <lastmod>2026-11-02T17:49:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-exploration-by-courtney-o-berry/sssssjna</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-exploration-by-courtney-o-berry/sssssjna"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-exploration-by-courtney-o-berry/sssssjna"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-exploration-by-courtney-o-berry/sssssjna"/>
      <lastmod>2026-11-02T02:59:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-exploration-by-courtney-o-berry/sssssjna</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-exploration-by-courtney-o-berry/sssssjna"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-exploration-by-courtney-o-berry/sssssjna"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-exploration-by-courtney-o-berry/sssssjna"/>
      <lastmod>2026-11-02T02:59:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-under-a-curve-by-lindasunli14/sssssjnc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-under-a-curve-by-lindasunli14/sssssjnc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-under-a-curve-by-lindasunli14/sssssjnc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-under-a-curve-by-lindasunli14/sssssjnc"/>
      <lastmod>2026-11-02T02:31:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-under-a-curve-by-lindasunli14/sssssjnc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-under-a-curve-by-lindasunli14/sssssjnc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-under-a-curve-by-lindasunli14/sssssjnc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-under-a-curve-by-lindasunli14/sssssjnc"/>
      <lastmod>2026-11-02T02:31:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/systems-of-linear-equations-2/sssssjnr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/systems-of-linear-equations-2/sssssjnr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/systems-of-linear-equations-2/sssssjnr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/systems-of-linear-equations-2/sssssjnr"/>
      <lastmod>2026-11-01T21:27:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/systems-of-linear-equations-2/sssssjnr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/systems-of-linear-equations-2/sssssjnr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/systems-of-linear-equations-2/sssssjnr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/systems-of-linear-equations-2/sssssjnr"/>
      <lastmod>2026-11-01T21:27:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-element-in-spherical-coordinates/sssssjnh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-element-in-spherical-coordinates/sssssjnh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-element-in-spherical-coordinates/sssssjnh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-element-in-spherical-coordinates/sssssjnh"/>
      <lastmod>2026-11-01T19:16:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-element-in-spherical-coordinates/sssssjnh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-element-in-spherical-coordinates/sssssjnh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-element-in-spherical-coordinates/sssssjnh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-element-in-spherical-coordinates/sssssjnh"/>
      <lastmod>2026-11-01T19:16:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotated-parabola-demo-by-mathartreallife/sssssjnt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotated-parabola-demo-by-mathartreallife/sssssjnt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotated-parabola-demo-by-mathartreallife/sssssjnt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotated-parabola-demo-by-mathartreallife/sssssjnt"/>
      <lastmod>2026-11-02T18:30:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotated-parabola-demo-by-mathartreallife/sssssjnt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotated-parabola-demo-by-mathartreallife/sssssjnt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotated-parabola-demo-by-mathartreallife/sssssjnt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotated-parabola-demo-by-mathartreallife/sssssjnt"/>
      <lastmod>2026-11-02T18:30:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/euclidean-rotation/sssssjnx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euclidean-rotation/sssssjnx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euclidean-rotation/sssssjnx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euclidean-rotation/sssssjnx"/>
      <lastmod>2026-11-02T17:52:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/euclidean-rotation/sssssjnx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euclidean-rotation/sssssjnx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euclidean-rotation/sssssjnx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euclidean-rotation/sssssjnx"/>
      <lastmod>2026-11-02T17:52:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/divisibility-by-2-3-4-5-6-8-9-and-10-quiz/sssssjni</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/divisibility-by-2-3-4-5-6-8-9-and-10-quiz/sssssjni"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/divisibility-by-2-3-4-5-6-8-9-and-10-quiz/sssssjni"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/divisibility-by-2-3-4-5-6-8-9-and-10-quiz/sssssjni"/>
      <lastmod>2026-11-01T19:31:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/divisibility-by-2-3-4-5-6-8-9-and-10-quiz/sssssjni</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/divisibility-by-2-3-4-5-6-8-9-and-10-quiz/sssssjni"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/divisibility-by-2-3-4-5-6-8-9-and-10-quiz/sssssjni"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/divisibility-by-2-3-4-5-6-8-9-and-10-quiz/sssssjni"/>
      <lastmod>2026-11-01T19:31:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perimeter-of-a-rectangle-by-math-teachers-adventure-of-ict-integration/sssssjno</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-of-a-rectangle-by-math-teachers-adventure-of-ict-integration/sssssjno"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-of-a-rectangle-by-math-teachers-adventure-of-ict-integration/sssssjno"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-of-a-rectangle-by-math-teachers-adventure-of-ict-integration/sssssjno"/>
      <lastmod>2026-11-02T17:51:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perimeter-of-a-rectangle-by-math-teachers-adventure-of-ict-integration/sssssjno</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-of-a-rectangle-by-math-teachers-adventure-of-ict-integration/sssssjno"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-of-a-rectangle-by-math-teachers-adventure-of-ict-integration/sssssjno"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-of-a-rectangle-by-math-teachers-adventure-of-ict-integration/sssssjno"/>
      <lastmod>2026-11-02T17:51:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wordless-proof-sum-of-odd-numbers/sssssj2s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wordless-proof-sum-of-odd-numbers/sssssj2s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wordless-proof-sum-of-odd-numbers/sssssj2s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wordless-proof-sum-of-odd-numbers/sssssj2s"/>
      <lastmod>2026-11-01T19:14:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wordless-proof-sum-of-odd-numbers/sssssj2s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wordless-proof-sum-of-odd-numbers/sssssj2s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wordless-proof-sum-of-odd-numbers/sssssj2s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wordless-proof-sum-of-odd-numbers/sssssj2s"/>
      <lastmod>2026-11-01T19:14:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/4-10-area-model-and-rectangle/sssssj27</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/4-10-area-model-and-rectangle/sssssj27"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/4-10-area-model-and-rectangle/sssssj27"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/4-10-area-model-and-rectangle/sssssj27"/>
      <lastmod>2026-11-02T16:45:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/4-10-area-model-and-rectangle/sssssj27</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/4-10-area-model-and-rectangle/sssssj27"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/4-10-area-model-and-rectangle/sssssj27"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/4-10-area-model-and-rectangle/sssssj27"/>
      <lastmod>2026-11-02T16:45:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-relationship-among-triangle-s-angle-bisector-orthocenter-and-circumcen/sssssj2n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-relationship-among-triangle-s-angle-bisector-orthocenter-and-circumcen/sssssj2n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-relationship-among-triangle-s-angle-bisector-orthocenter-and-circumcen/sssssj2n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-relationship-among-triangle-s-angle-bisector-orthocenter-and-circumcen/sssssj2n"/>
      <lastmod>2026-11-02T10:44:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-relationship-among-triangle-s-angle-bisector-orthocenter-and-circumcen/sssssj2n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-relationship-among-triangle-s-angle-bisector-orthocenter-and-circumcen/sssssj2n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-relationship-among-triangle-s-angle-bisector-orthocenter-and-circumcen/sssssj2n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-relationship-among-triangle-s-angle-bisector-orthocenter-and-circumcen/sssssj2n"/>
      <lastmod>2026-11-02T10:44:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circles-tangent-to-a-given-line-and-passing-through-two-points/sssssj22</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circles-tangent-to-a-given-line-and-passing-through-two-points/sssssj22"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circles-tangent-to-a-given-line-and-passing-through-two-points/sssssj22"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circles-tangent-to-a-given-line-and-passing-through-two-points/sssssj22"/>
      <lastmod>2026-11-01T20:50:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circles-tangent-to-a-given-line-and-passing-through-two-points/sssssj22</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circles-tangent-to-a-given-line-and-passing-through-two-points/sssssj22"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circles-tangent-to-a-given-line-and-passing-through-two-points/sssssj22"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circles-tangent-to-a-given-line-and-passing-through-two-points/sssssj22"/>
      <lastmod>2026-11-01T20:50:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shreddies-and-milk-with-linear-inequality/sssssj2k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shreddies-and-milk-with-linear-inequality/sssssj2k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shreddies-and-milk-with-linear-inequality/sssssj2k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shreddies-and-milk-with-linear-inequality/sssssj2k"/>
      <lastmod>2026-11-01T19:31:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shreddies-and-milk-with-linear-inequality/sssssj2k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shreddies-and-milk-with-linear-inequality/sssssj2k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shreddies-and-milk-with-linear-inequality/sssssj2k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shreddies-and-milk-with-linear-inequality/sssssj2k"/>
      <lastmod>2026-11-01T19:31:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/schlegel-diagram-of-dodecahedron/sssssj2z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/schlegel-diagram-of-dodecahedron/sssssj2z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/schlegel-diagram-of-dodecahedron/sssssj2z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/schlegel-diagram-of-dodecahedron/sssssj2z"/>
      <lastmod>2026-11-02T16:49:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/schlegel-diagram-of-dodecahedron/sssssj2z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/schlegel-diagram-of-dodecahedron/sssssj2z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/schlegel-diagram-of-dodecahedron/sssssj2z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/schlegel-diagram-of-dodecahedron/sssssj2z"/>
      <lastmod>2026-11-02T16:49:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/deriving-the-area-of-a-trapezium-using-a-parallelogram/sssssj20</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/deriving-the-area-of-a-trapezium-using-a-parallelogram/sssssj20"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/deriving-the-area-of-a-trapezium-using-a-parallelogram/sssssj20"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/deriving-the-area-of-a-trapezium-using-a-parallelogram/sssssj20"/>
      <lastmod>2026-11-01T21:35:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/deriving-the-area-of-a-trapezium-using-a-parallelogram/sssssj20</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/deriving-the-area-of-a-trapezium-using-a-parallelogram/sssssj20"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/deriving-the-area-of-a-trapezium-using-a-parallelogram/sssssj20"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/deriving-the-area-of-a-trapezium-using-a-parallelogram/sssssj20"/>
      <lastmod>2026-11-01T21:35:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-equation-application-problem-generator-three-friends-with-different-amo/sssssj2d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equation-application-problem-generator-three-friends-with-different-amo/sssssj2d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equation-application-problem-generator-three-friends-with-different-amo/sssssj2d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equation-application-problem-generator-three-friends-with-different-amo/sssssj2d"/>
      <lastmod>2026-11-01T21:40:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-equation-application-problem-generator-three-friends-with-different-amo/sssssj2d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equation-application-problem-generator-three-friends-with-different-amo/sssssj2d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equation-application-problem-generator-three-friends-with-different-amo/sssssj2d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equation-application-problem-generator-three-friends-with-different-amo/sssssj2d"/>
      <lastmod>2026-11-01T21:40:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-plane-dilations/sssssj2f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-plane-dilations/sssssj2f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-plane-dilations/sssssj2f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-plane-dilations/sssssj2f"/>
      <lastmod>2026-11-02T18:20:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-plane-dilations/sssssj2f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-plane-dilations/sssssj2f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-plane-dilations/sssssj2f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-plane-dilations/sssssj2f"/>
      <lastmod>2026-11-02T18:20:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-7-5-15-practice-solving-equations-with-rational-numbers/sssssj28</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-5-15-practice-solving-equations-with-rational-numbers/sssssj28"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-5-15-practice-solving-equations-with-rational-numbers/sssssj28"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-5-15-practice-solving-equations-with-rational-numbers/sssssj28"/>
      <lastmod>2026-11-02T10:37:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-7-5-15-practice-solving-equations-with-rational-numbers/sssssj28</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-5-15-practice-solving-equations-with-rational-numbers/sssssj28"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-5-15-practice-solving-equations-with-rational-numbers/sssssj28"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-5-15-practice-solving-equations-with-rational-numbers/sssssj28"/>
      <lastmod>2026-11-02T10:37:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mass-vs-time-square-root-2/sssssj2u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mass-vs-time-square-root-2/sssssj2u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mass-vs-time-square-root-2/sssssj2u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mass-vs-time-square-root-2/sssssj2u"/>
      <lastmod>2026-11-02T13:01:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mass-vs-time-square-root-2/sssssj2u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mass-vs-time-square-root-2/sssssj2u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mass-vs-time-square-root-2/sssssj2u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mass-vs-time-square-root-2/sssssj2u"/>
      <lastmod>2026-11-02T13:01:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slope-intercept-form-interactive-demo-exploring-slope-and-intercept/sssssj25</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-intercept-form-interactive-demo-exploring-slope-and-intercept/sssssj25"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-intercept-form-interactive-demo-exploring-slope-and-intercept/sssssj25"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-intercept-form-interactive-demo-exploring-slope-and-intercept/sssssj25"/>
      <lastmod>2026-11-02T00:39:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slope-intercept-form-interactive-demo-exploring-slope-and-intercept/sssssj25</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-intercept-form-interactive-demo-exploring-slope-and-intercept/sssssj25"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-intercept-form-interactive-demo-exploring-slope-and-intercept/sssssj25"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-intercept-form-interactive-demo-exploring-slope-and-intercept/sssssj25"/>
      <lastmod>2026-11-02T00:39:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-station-basic-reflections/sssssj2b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-station-basic-reflections/sssssj2b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-station-basic-reflections/sssssj2b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-station-basic-reflections/sssssj2b"/>
      <lastmod>2026-11-02T18:25:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-station-basic-reflections/sssssj2b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-station-basic-reflections/sssssj2b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-station-basic-reflections/sssssj2b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-station-basic-reflections/sssssj2b"/>
      <lastmod>2026-11-02T18:25:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/colorful-baravelle-cube/sssssj23</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/colorful-baravelle-cube/sssssj23"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/colorful-baravelle-cube/sssssj23"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/colorful-baravelle-cube/sssssj23"/>
      <lastmod>2026-11-02T02:55:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/colorful-baravelle-cube/sssssj23</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/colorful-baravelle-cube/sssssj23"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/colorful-baravelle-cube/sssssj23"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/colorful-baravelle-cube/sssssj23"/>
      <lastmod>2026-11-02T02:55:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/power-of-a-point-theorem-demo/sssssj2q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/power-of-a-point-theorem-demo/sssssj2q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/power-of-a-point-theorem-demo/sssssj2q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/power-of-a-point-theorem-demo/sssssj2q"/>
      <lastmod>2026-11-02T02:43:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/power-of-a-point-theorem-demo/sssssj2q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/power-of-a-point-theorem-demo/sssssj2q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/power-of-a-point-theorem-demo/sssssj2q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/power-of-a-point-theorem-demo/sssssj2q"/>
      <lastmod>2026-11-02T02:43:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformations-of-exponential-functions-left-right/sssssj21</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-of-exponential-functions-left-right/sssssj21"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-of-exponential-functions-left-right/sssssj21"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-of-exponential-functions-left-right/sssssj21"/>
      <lastmod>2026-11-02T03:09:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformations-of-exponential-functions-left-right/sssssj21</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-of-exponential-functions-left-right/sssssj21"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-of-exponential-functions-left-right/sssssj21"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-of-exponential-functions-left-right/sssssj21"/>
      <lastmod>2026-11-02T03:09:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-a-system-of-linear-equations-by-magdi-akasha/sssssj2m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-a-system-of-linear-equations-by-magdi-akasha/sssssj2m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-a-system-of-linear-equations-by-magdi-akasha/sssssj2m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-a-system-of-linear-equations-by-magdi-akasha/sssssj2m"/>
      <lastmod>2026-11-01T23:25:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-a-system-of-linear-equations-by-magdi-akasha/sssssj2m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-a-system-of-linear-equations-by-magdi-akasha/sssssj2m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-a-system-of-linear-equations-by-magdi-akasha/sssssj2m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-a-system-of-linear-equations-by-magdi-akasha/sssssj2m"/>
      <lastmod>2026-11-01T23:25:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sample-variance-command-demonstration/sssssj2j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sample-variance-command-demonstration/sssssj2j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sample-variance-command-demonstration/sssssj2j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sample-variance-command-demonstration/sssssj2j"/>
      <lastmod>2026-11-01T21:40:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sample-variance-command-demonstration/sssssj2j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sample-variance-command-demonstration/sssssj2j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sample-variance-command-demonstration/sssssj2j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sample-variance-command-demonstration/sssssj2j"/>
      <lastmod>2026-11-01T21:40:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vertical-partitions-square-vs-circle/sssssj2p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-partitions-square-vs-circle/sssssj2p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-partitions-square-vs-circle/sssssj2p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-partitions-square-vs-circle/sssssj2p"/>
      <lastmod>2026-11-02T16:45:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vertical-partitions-square-vs-circle/sssssj2p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-partitions-square-vs-circle/sssssj2p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-partitions-square-vs-circle/sssssj2p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-partitions-square-vs-circle/sssssj2p"/>
      <lastmod>2026-11-02T16:45:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-equality-of-fractions-with-geometric-construction/sssssj2w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-equality-of-fractions-with-geometric-construction/sssssj2w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-equality-of-fractions-with-geometric-construction/sssssj2w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-equality-of-fractions-with-geometric-construction/sssssj2w"/>
      <lastmod>2026-11-02T16:38:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-equality-of-fractions-with-geometric-construction/sssssj2w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-equality-of-fractions-with-geometric-construction/sssssj2w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-equality-of-fractions-with-geometric-construction/sssssj2w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-equality-of-fractions-with-geometric-construction/sssssj2w"/>
      <lastmod>2026-11-02T16:38:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/calculating-areas-of-parallelograms-and-trapezoids/sssssj26</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-areas-of-parallelograms-and-trapezoids/sssssj26"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-areas-of-parallelograms-and-trapezoids/sssssj26"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-areas-of-parallelograms-and-trapezoids/sssssj26"/>
      <lastmod>2026-11-02T17:15:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/calculating-areas-of-parallelograms-and-trapezoids/sssssj26</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-areas-of-parallelograms-and-trapezoids/sssssj26"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-areas-of-parallelograms-and-trapezoids/sssssj26"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-areas-of-parallelograms-and-trapezoids/sssssj26"/>
      <lastmod>2026-11-02T17:15:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-and-pyramid-combination-demo/sssssj2g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-and-pyramid-combination-demo/sssssj2g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-and-pyramid-combination-demo/sssssj2g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-and-pyramid-combination-demo/sssssj2g"/>
      <lastmod>2026-11-01T20:52:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-and-pyramid-combination-demo/sssssj2g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-and-pyramid-combination-demo/sssssj2g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-and-pyramid-combination-demo/sssssj2g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-and-pyramid-combination-demo/sssssj2g"/>
      <lastmod>2026-11-01T20:52:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-circles/sssssj29</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-circles/sssssj29"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-circles/sssssj29"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-circles/sssssj29"/>
      <lastmod>2026-11-01T21:16:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-circles/sssssj29</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-circles/sssssj29"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-circles/sssssj29"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-circles/sssssj29"/>
      <lastmod>2026-11-01T21:16:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-median-exploration-definition-writing-prompt/sssssj2e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-median-exploration-definition-writing-prompt/sssssj2e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-median-exploration-definition-writing-prompt/sssssj2e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-median-exploration-definition-writing-prompt/sssssj2e"/>
      <lastmod>2026-11-01T23:20:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-median-exploration-definition-writing-prompt/sssssj2e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-median-exploration-definition-writing-prompt/sssssj2e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-median-exploration-definition-writing-prompt/sssssj2e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-median-exploration-definition-writing-prompt/sssssj2e"/>
      <lastmod>2026-11-01T23:20:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-standard-function-demo/sssssj2v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-standard-function-demo/sssssj2v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-standard-function-demo/sssssj2v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-standard-function-demo/sssssj2v"/>
      <lastmod>2026-11-02T00:51:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-standard-function-demo/sssssj2v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-standard-function-demo/sssssj2v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-standard-function-demo/sssssj2v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-standard-function-demo/sssssj2v"/>
      <lastmod>2026-11-02T00:51:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/three-person-poll/sssssj24</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-person-poll/sssssj24"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-person-poll/sssssj24"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-person-poll/sssssj24"/>
      <lastmod>2026-11-02T18:58:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/three-person-poll/sssssj24</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-person-poll/sssssj24"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-person-poll/sssssj24"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-person-poll/sssssj24"/>
      <lastmod>2026-11-02T18:58:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-alternate-exterior-angles/sssssj2l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-alternate-exterior-angles/sssssj2l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-alternate-exterior-angles/sssssj2l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-alternate-exterior-angles/sssssj2l"/>
      <lastmod>2026-11-02T02:22:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-alternate-exterior-angles/sssssj2l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-alternate-exterior-angles/sssssj2l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-alternate-exterior-angles/sssssj2l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-alternate-exterior-angles/sssssj2l"/>
      <lastmod>2026-11-02T02:22:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezium-area-duplication/sssssj2y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-area-duplication/sssssj2y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-area-duplication/sssssj2y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-area-duplication/sssssj2y"/>
      <lastmod>2026-11-01T21:16:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezium-area-duplication/sssssj2y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-area-duplication/sssssj2y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-area-duplication/sssssj2y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-area-duplication/sssssj2y"/>
      <lastmod>2026-11-01T21:16:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-function-graphing/sssssj2a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-function-graphing/sssssj2a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-function-graphing/sssssj2a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-function-graphing/sssssj2a"/>
      <lastmod>2026-11-02T16:57:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-function-graphing/sssssj2a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-function-graphing/sssssj2a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-function-graphing/sssssj2a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-function-graphing/sssssj2a"/>
      <lastmod>2026-11-02T16:57:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-and-tessellation/sssssj2c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-and-tessellation/sssssj2c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-and-tessellation/sssssj2c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-and-tessellation/sssssj2c"/>
      <lastmod>2026-11-02T10:38:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-and-tessellation/sssssj2c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-and-tessellation/sssssj2c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-and-tessellation/sssssj2c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-and-tessellation/sssssj2c"/>
      <lastmod>2026-11-02T10:38:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-two-fractions-geometric-construction-and-function-graphs/sssssj2r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-two-fractions-geometric-construction-and-function-graphs/sssssj2r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-two-fractions-geometric-construction-and-function-graphs/sssssj2r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-two-fractions-geometric-construction-and-function-graphs/sssssj2r"/>
      <lastmod>2026-11-02T02:50:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-two-fractions-geometric-construction-and-function-graphs/sssssj2r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-two-fractions-geometric-construction-and-function-graphs/sssssj2r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-two-fractions-geometric-construction-and-function-graphs/sssssj2r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-two-fractions-geometric-construction-and-function-graphs/sssssj2r"/>
      <lastmod>2026-11-02T02:50:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/line-through-movable-point-a-tangent-to-circle-of-radius-r/sssssj2h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-through-movable-point-a-tangent-to-circle-of-radius-r/sssssj2h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-through-movable-point-a-tangent-to-circle-of-radius-r/sssssj2h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-through-movable-point-a-tangent-to-circle-of-radius-r/sssssj2h"/>
      <lastmod>2026-11-01T23:10:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/line-through-movable-point-a-tangent-to-circle-of-radius-r/sssssj2h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-through-movable-point-a-tangent-to-circle-of-radius-r/sssssj2h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-through-movable-point-a-tangent-to-circle-of-radius-r/sssssj2h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-through-movable-point-a-tangent-to-circle-of-radius-r/sssssj2h"/>
      <lastmod>2026-11-01T23:10:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/build-fit-linear-functions-dynamic-modeling-and-data-analysis/sssssj2t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/build-fit-linear-functions-dynamic-modeling-and-data-analysis/sssssj2t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/build-fit-linear-functions-dynamic-modeling-and-data-analysis/sssssj2t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/build-fit-linear-functions-dynamic-modeling-and-data-analysis/sssssj2t"/>
      <lastmod>2026-11-02T00:45:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/build-fit-linear-functions-dynamic-modeling-and-data-analysis/sssssj2t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/build-fit-linear-functions-dynamic-modeling-and-data-analysis/sssssj2t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/build-fit-linear-functions-dynamic-modeling-and-data-analysis/sssssj2t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/build-fit-linear-functions-dynamic-modeling-and-data-analysis/sssssj2t"/>
      <lastmod>2026-11-02T00:45:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/maximum-area-with-fixed-angle/sssssj2x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximum-area-with-fixed-angle/sssssj2x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximum-area-with-fixed-angle/sssssj2x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximum-area-with-fixed-angle/sssssj2x"/>
      <lastmod>2026-11-02T18:35:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/maximum-area-with-fixed-angle/sssssj2x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximum-area-with-fixed-angle/sssssj2x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximum-area-with-fixed-angle/sssssj2x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximum-area-with-fixed-angle/sssssj2x"/>
      <lastmod>2026-11-02T18:35:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bell-parabola-arc-construction/sssssj2i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bell-parabola-arc-construction/sssssj2i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bell-parabola-arc-construction/sssssj2i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bell-parabola-arc-construction/sssssj2i"/>
      <lastmod>2026-11-02T16:39:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bell-parabola-arc-construction/sssssj2i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bell-parabola-arc-construction/sssssj2i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bell-parabola-arc-construction/sssssj2i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bell-parabola-arc-construction/sssssj2i"/>
      <lastmod>2026-11-02T16:39:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/taylor-series-exploration/sssssj2o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/taylor-series-exploration/sssssj2o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/taylor-series-exploration/sssssj2o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/taylor-series-exploration/sssssj2o"/>
      <lastmod>2026-11-01T21:34:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/taylor-series-exploration/sssssj2o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/taylor-series-exploration/sssssj2o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/taylor-series-exploration/sssssj2o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/taylor-series-exploration/sssssj2o"/>
      <lastmod>2026-11-01T21:34:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trig-ratios-2-interactive-right-triangle-sine-cosine-and-tangent/sssssjks</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trig-ratios-2-interactive-right-triangle-sine-cosine-and-tangent/sssssjks"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trig-ratios-2-interactive-right-triangle-sine-cosine-and-tangent/sssssjks"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trig-ratios-2-interactive-right-triangle-sine-cosine-and-tangent/sssssjks"/>
      <lastmod>2026-11-01T22:04:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trig-ratios-2-interactive-right-triangle-sine-cosine-and-tangent/sssssjks</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trig-ratios-2-interactive-right-triangle-sine-cosine-and-tangent/sssssjks"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trig-ratios-2-interactive-right-triangle-sine-cosine-and-tangent/sssssjks"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trig-ratios-2-interactive-right-triangle-sine-cosine-and-tangent/sssssjks"/>
      <lastmod>2026-11-01T22:04:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-hexagonal-prism-by-harcharan-sidhu/sssssjk7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-hexagonal-prism-by-harcharan-sidhu/sssssjk7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-hexagonal-prism-by-harcharan-sidhu/sssssjk7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-hexagonal-prism-by-harcharan-sidhu/sssssjk7"/>
      <lastmod>2026-11-02T18:29:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-hexagonal-prism-by-harcharan-sidhu/sssssjk7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-hexagonal-prism-by-harcharan-sidhu/sssssjk7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-hexagonal-prism-by-harcharan-sidhu/sssssjk7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-hexagonal-prism-by-harcharan-sidhu/sssssjk7"/>
      <lastmod>2026-11-02T18:29:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/expanding-a-single-bracket-a-visual-algebraic-geometric-demo/sssssjkn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/expanding-a-single-bracket-a-visual-algebraic-geometric-demo/sssssjkn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/expanding-a-single-bracket-a-visual-algebraic-geometric-demo/sssssjkn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/expanding-a-single-bracket-a-visual-algebraic-geometric-demo/sssssjkn"/>
      <lastmod>2026-11-02T17:10:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/expanding-a-single-bracket-a-visual-algebraic-geometric-demo/sssssjkn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/expanding-a-single-bracket-a-visual-algebraic-geometric-demo/sssssjkn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/expanding-a-single-bracket-a-visual-algebraic-geometric-demo/sssssjkn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/expanding-a-single-bracket-a-visual-algebraic-geometric-demo/sssssjkn"/>
      <lastmod>2026-11-02T17:10:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/planes-in-3-space/sssssjk2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planes-in-3-space/sssssjk2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes-in-3-space/sssssjk2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes-in-3-space/sssssjk2"/>
      <lastmod>2026-11-02T18:54:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/planes-in-3-space/sssssjk2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planes-in-3-space/sssssjk2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes-in-3-space/sssssjk2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes-in-3-space/sssssjk2"/>
      <lastmod>2026-11-02T18:54:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-reference-triangle-visualizing-trigonometric-functions/sssssjkk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-reference-triangle-visualizing-trigonometric-functions/sssssjkk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-reference-triangle-visualizing-trigonometric-functions/sssssjkk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-reference-triangle-visualizing-trigonometric-functions/sssssjkk"/>
      <lastmod>2026-11-01T19:31:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-reference-triangle-visualizing-trigonometric-functions/sssssjkk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-reference-triangle-visualizing-trigonometric-functions/sssssjkk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-reference-triangle-visualizing-trigonometric-functions/sssssjkk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-reference-triangle-visualizing-trigonometric-functions/sssssjkk"/>
      <lastmod>2026-11-01T19:31:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/11-and-13-pointed-stars/sssssjkz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/11-and-13-pointed-stars/sssssjkz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/11-and-13-pointed-stars/sssssjkz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/11-and-13-pointed-stars/sssssjkz"/>
      <lastmod>2026-11-02T02:16:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/11-and-13-pointed-stars/sssssjkz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/11-and-13-pointed-stars/sssssjkz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/11-and-13-pointed-stars/sssssjkz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/11-and-13-pointed-stars/sssssjkz"/>
      <lastmod>2026-11-02T02:16:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hsv-scheme-enhanced-with-modulus-and-phase-level-curves/sssssjk0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hsv-scheme-enhanced-with-modulus-and-phase-level-curves/sssssjk0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hsv-scheme-enhanced-with-modulus-and-phase-level-curves/sssssjk0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hsv-scheme-enhanced-with-modulus-and-phase-level-curves/sssssjk0"/>
      <lastmod>2026-11-02T02:19:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hsv-scheme-enhanced-with-modulus-and-phase-level-curves/sssssjk0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hsv-scheme-enhanced-with-modulus-and-phase-level-curves/sssssjk0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hsv-scheme-enhanced-with-modulus-and-phase-level-curves/sssssjk0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hsv-scheme-enhanced-with-modulus-and-phase-level-curves/sssssjk0"/>
      <lastmod>2026-11-02T02:19:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotated-parabolas-dynamic-geometry-in-coordinate-geometry/sssssjkd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotated-parabolas-dynamic-geometry-in-coordinate-geometry/sssssjkd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotated-parabolas-dynamic-geometry-in-coordinate-geometry/sssssjkd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotated-parabolas-dynamic-geometry-in-coordinate-geometry/sssssjkd"/>
      <lastmod>2026-11-02T00:14:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotated-parabolas-dynamic-geometry-in-coordinate-geometry/sssssjkd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotated-parabolas-dynamic-geometry-in-coordinate-geometry/sssssjkd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotated-parabolas-dynamic-geometry-in-coordinate-geometry/sssssjkd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotated-parabolas-dynamic-geometry-in-coordinate-geometry/sssssjkd"/>
      <lastmod>2026-11-02T00:14:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-cone-by-ooi-soo-huat/sssssjkf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-ooi-soo-huat/sssssjkf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cone-by-ooi-soo-huat/sssssjkf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-ooi-soo-huat/sssssjkf"/>
      <lastmod>2026-11-02T17:45:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-a-cone-by-ooi-soo-huat/sssssjkf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-ooi-soo-huat/sssssjkf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cone-by-ooi-soo-huat/sssssjkf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-ooi-soo-huat/sssssjkf"/>
      <lastmod>2026-11-02T17:45:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/effect-of-second-differences/sssssjk8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/effect-of-second-differences/sssssjk8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/effect-of-second-differences/sssssjk8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/effect-of-second-differences/sssssjk8"/>
      <lastmod>2026-11-02T18:30:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/effect-of-second-differences/sssssjk8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/effect-of-second-differences/sssssjk8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/effect-of-second-differences/sssssjk8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/effect-of-second-differences/sssssjk8"/>
      <lastmod>2026-11-02T18:30:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-locus-without-snapping/sssssjku</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-locus-without-snapping/sssssjku"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-locus-without-snapping/sssssjku"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-locus-without-snapping/sssssjku"/>
      <lastmod>2026-11-02T16:33:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-locus-without-snapping/sssssjku</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-locus-without-snapping/sssssjku"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-locus-without-snapping/sssssjku"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-locus-without-snapping/sssssjku"/>
      <lastmod>2026-11-02T16:33:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangular-prism-net/sssssjk5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-prism-net/sssssjk5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-prism-net/sssssjk5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-prism-net/sssssjk5"/>
      <lastmod>2026-11-02T18:20:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangular-prism-net/sssssjk5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-prism-net/sssssjk5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-prism-net/sssssjk5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-prism-net/sssssjk5"/>
      <lastmod>2026-11-02T18:20:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/find-slope-intercept-equation/sssssjkb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-slope-intercept-equation/sssssjkb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-slope-intercept-equation/sssssjkb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-slope-intercept-equation/sssssjkb"/>
      <lastmod>2026-11-02T18:26:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/find-slope-intercept-equation/sssssjkb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-slope-intercept-equation/sssssjkb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-slope-intercept-equation/sssssjkb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-slope-intercept-equation/sssssjkb"/>
      <lastmod>2026-11-02T18:26:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/completing-the-square-for-quadratic-equation-ii-solving-the-equation/sssssjk3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/completing-the-square-for-quadratic-equation-ii-solving-the-equation/sssssjk3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/completing-the-square-for-quadratic-equation-ii-solving-the-equation/sssssjk3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/completing-the-square-for-quadratic-equation-ii-solving-the-equation/sssssjk3"/>
      <lastmod>2026-11-02T15:18:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/completing-the-square-for-quadratic-equation-ii-solving-the-equation/sssssjk3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/completing-the-square-for-quadratic-equation-ii-solving-the-equation/sssssjk3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/completing-the-square-for-quadratic-equation-ii-solving-the-equation/sssssjk3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/completing-the-square-for-quadratic-equation-ii-solving-the-equation/sssssjk3"/>
      <lastmod>2026-11-02T15:18:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-addition-and-subtraction-of-signed-numbers/sssssjkq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-addition-and-subtraction-of-signed-numbers/sssssjkq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-addition-and-subtraction-of-signed-numbers/sssssjkq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-addition-and-subtraction-of-signed-numbers/sssssjkq"/>
      <lastmod>2026-11-01T21:28:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-addition-and-subtraction-of-signed-numbers/sssssjkq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-addition-and-subtraction-of-signed-numbers/sssssjkq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-addition-and-subtraction-of-signed-numbers/sssssjkq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-addition-and-subtraction-of-signed-numbers/sssssjkq"/>
      <lastmod>2026-11-01T21:28:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equivalent-fractions-by-james-p-robinson/sssssjk1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-fractions-by-james-p-robinson/sssssjk1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-fractions-by-james-p-robinson/sssssjk1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-fractions-by-james-p-robinson/sssssjk1"/>
      <lastmod>2026-11-02T18:14:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equivalent-fractions-by-james-p-robinson/sssssjk1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-fractions-by-james-p-robinson/sssssjk1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-fractions-by-james-p-robinson/sssssjk1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-fractions-by-james-p-robinson/sssssjk1"/>
      <lastmod>2026-11-02T18:14:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/xiaomi-logo-geometric-construction-vectors-polygons-and-circular-arcs/sssssjkm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/xiaomi-logo-geometric-construction-vectors-polygons-and-circular-arcs/sssssjkm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/xiaomi-logo-geometric-construction-vectors-polygons-and-circular-arcs/sssssjkm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/xiaomi-logo-geometric-construction-vectors-polygons-and-circular-arcs/sssssjkm"/>
      <lastmod>2026-11-01T21:43:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/xiaomi-logo-geometric-construction-vectors-polygons-and-circular-arcs/sssssjkm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/xiaomi-logo-geometric-construction-vectors-polygons-and-circular-arcs/sssssjkm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/xiaomi-logo-geometric-construction-vectors-polygons-and-circular-arcs/sssssjkm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/xiaomi-logo-geometric-construction-vectors-polygons-and-circular-arcs/sssssjkm"/>
      <lastmod>2026-11-01T21:43:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a-swirl-of-spirals/sssssjkj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-swirl-of-spirals/sssssjkj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-swirl-of-spirals/sssssjkj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-swirl-of-spirals/sssssjkj"/>
      <lastmod>2026-11-02T16:31:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a-swirl-of-spirals/sssssjkj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-swirl-of-spirals/sssssjkj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-swirl-of-spirals/sssssjkj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-swirl-of-spirals/sssssjkj"/>
      <lastmod>2026-11-02T16:31:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adjacent-angles-demo/sssssjkp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adjacent-angles-demo/sssssjkp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adjacent-angles-demo/sssssjkp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adjacent-angles-demo/sssssjkp"/>
      <lastmod>2026-11-01T19:33:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adjacent-angles-demo/sssssjkp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adjacent-angles-demo/sssssjkp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adjacent-angles-demo/sssssjkp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adjacent-angles-demo/sssssjkp"/>
      <lastmod>2026-11-01T19:33:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/alternate-interior-angles-by-cathy-guyer/sssssjkw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-interior-angles-by-cathy-guyer/sssssjkw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-interior-angles-by-cathy-guyer/sssssjkw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-interior-angles-by-cathy-guyer/sssssjkw"/>
      <lastmod>2026-11-02T18:35:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/alternate-interior-angles-by-cathy-guyer/sssssjkw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-interior-angles-by-cathy-guyer/sssssjkw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-interior-angles-by-cathy-guyer/sssssjkw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-interior-angles-by-cathy-guyer/sssssjkw"/>
      <lastmod>2026-11-02T18:35:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animation-demonstrating-circumcircle-and-incircle/sssssjk6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-demonstrating-circumcircle-and-incircle/sssssjk6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-demonstrating-circumcircle-and-incircle/sssssjk6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-demonstrating-circumcircle-and-incircle/sssssjk6"/>
      <lastmod>2026-11-02T17:17:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animation-demonstrating-circumcircle-and-incircle/sssssjk6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-demonstrating-circumcircle-and-incircle/sssssjk6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-demonstrating-circumcircle-and-incircle/sssssjk6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-demonstrating-circumcircle-and-incircle/sssssjk6"/>
      <lastmod>2026-11-02T17:17:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/factor-quadratic-expression/sssssjkg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factor-quadratic-expression/sssssjkg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factor-quadratic-expression/sssssjkg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factor-quadratic-expression/sssssjkg"/>
      <lastmod>2026-11-02T18:02:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/factor-quadratic-expression/sssssjkg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factor-quadratic-expression/sssssjkg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factor-quadratic-expression/sssssjkg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factor-quadratic-expression/sssssjkg"/>
      <lastmod>2026-11-02T18:02:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-of-triangle-area/sssssjk9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-triangle-area/sssssjk9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-triangle-area/sssssjk9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-triangle-area/sssssjk9"/>
      <lastmod>2026-11-01T23:52:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-of-triangle-area/sssssjk9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-triangle-area/sssssjk9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-triangle-area/sssssjk9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-triangle-area/sssssjk9"/>
      <lastmod>2026-11-01T23:52:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-shape-and-dimensions/sssssjke</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-shape-and-dimensions/sssssjke"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-shape-and-dimensions/sssssjke"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-shape-and-dimensions/sssssjke"/>
      <lastmod>2026-11-02T16:46:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-shape-and-dimensions/sssssjke</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-shape-and-dimensions/sssssjke"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-shape-and-dimensions/sssssjke"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-shape-and-dimensions/sssssjke"/>
      <lastmod>2026-11-02T16:46:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/squares-and-rectangles/sssssjkv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squares-and-rectangles/sssssjkv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squares-and-rectangles/sssssjkv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squares-and-rectangles/sssssjkv"/>
      <lastmod>2026-11-02T17:13:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/squares-and-rectangles/sssssjkv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squares-and-rectangles/sssssjkv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squares-and-rectangles/sssssjkv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squares-and-rectangles/sssssjkv"/>
      <lastmod>2026-11-02T17:13:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/addition-slider-vector-translation-and-rectangle-area/sssssjk4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-slider-vector-translation-and-rectangle-area/sssssjk4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-slider-vector-translation-and-rectangle-area/sssssjk4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-slider-vector-translation-and-rectangle-area/sssssjk4"/>
      <lastmod>2026-11-02T00:29:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/addition-slider-vector-translation-and-rectangle-area/sssssjk4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-slider-vector-translation-and-rectangle-area/sssssjk4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-slider-vector-translation-and-rectangle-area/sssssjk4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-slider-vector-translation-and-rectangle-area/sssssjk4"/>
      <lastmod>2026-11-02T00:29:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hypotenuse-of-45-45-90-equals-hypotenuse-of-30-60-90/sssssjkl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hypotenuse-of-45-45-90-equals-hypotenuse-of-30-60-90/sssssjkl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hypotenuse-of-45-45-90-equals-hypotenuse-of-30-60-90/sssssjkl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hypotenuse-of-45-45-90-equals-hypotenuse-of-30-60-90/sssssjkl"/>
      <lastmod>2026-11-02T07:17:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hypotenuse-of-45-45-90-equals-hypotenuse-of-30-60-90/sssssjkl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hypotenuse-of-45-45-90-equals-hypotenuse-of-30-60-90/sssssjkl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hypotenuse-of-45-45-90-equals-hypotenuse-of-30-60-90/sssssjkl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hypotenuse-of-45-45-90-equals-hypotenuse-of-30-60-90/sssssjkl"/>
      <lastmod>2026-11-02T07:17:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-pyramid-3d-construction-and-dynamic-exploration/sssssjky</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-pyramid-3d-construction-and-dynamic-exploration/sssssjky"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-pyramid-3d-construction-and-dynamic-exploration/sssssjky"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-pyramid-3d-construction-and-dynamic-exploration/sssssjky"/>
      <lastmod>2026-11-02T18:17:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-pyramid-3d-construction-and-dynamic-exploration/sssssjky</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-pyramid-3d-construction-and-dynamic-exploration/sssssjky"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-pyramid-3d-construction-and-dynamic-exploration/sssssjky"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-pyramid-3d-construction-and-dynamic-exploration/sssssjky"/>
      <lastmod>2026-11-02T18:17:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/convex-and-concave-polygons-demo/sssssjka</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/convex-and-concave-polygons-demo/sssssjka"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/convex-and-concave-polygons-demo/sssssjka"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/convex-and-concave-polygons-demo/sssssjka"/>
      <lastmod>2026-11-02T00:45:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/convex-and-concave-polygons-demo/sssssjka</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/convex-and-concave-polygons-demo/sssssjka"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/convex-and-concave-polygons-demo/sssssjka"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/convex-and-concave-polygons-demo/sssssjka"/>
      <lastmod>2026-11-02T00:45:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parametric-derivatives-visualizing-tangent-vectors/sssssjkc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-derivatives-visualizing-tangent-vectors/sssssjkc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-derivatives-visualizing-tangent-vectors/sssssjkc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-derivatives-visualizing-tangent-vectors/sssssjkc"/>
      <lastmod>2026-11-02T12:28:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parametric-derivatives-visualizing-tangent-vectors/sssssjkc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-derivatives-visualizing-tangent-vectors/sssssjkc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-derivatives-visualizing-tangent-vectors/sssssjkc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-derivatives-visualizing-tangent-vectors/sssssjkc"/>
      <lastmod>2026-11-02T12:28:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-number-multiplication-demonstration/sssssjkr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-multiplication-demonstration/sssssjkr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-multiplication-demonstration/sssssjkr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-multiplication-demonstration/sssssjkr"/>
      <lastmod>2026-11-02T18:18:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-number-multiplication-demonstration/sssssjkr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-multiplication-demonstration/sssssjkr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-multiplication-demonstration/sssssjkr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-multiplication-demonstration/sssssjkr"/>
      <lastmod>2026-11-02T18:18:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-root-function-graph-with-equilateral-triangle-intersections/sssssjkh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-root-function-graph-with-equilateral-triangle-intersections/sssssjkh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-root-function-graph-with-equilateral-triangle-intersections/sssssjkh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-root-function-graph-with-equilateral-triangle-intersections/sssssjkh"/>
      <lastmod>2026-11-02T18:49:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-root-function-graph-with-equilateral-triangle-intersections/sssssjkh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-root-function-graph-with-equilateral-triangle-intersections/sssssjkh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-root-function-graph-with-equilateral-triangle-intersections/sssssjkh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-root-function-graph-with-equilateral-triangle-intersections/sssssjkh"/>
      <lastmod>2026-11-02T18:49:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/discount-and-tax-percentage-calculation/sssssjkt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discount-and-tax-percentage-calculation/sssssjkt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discount-and-tax-percentage-calculation/sssssjkt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discount-and-tax-percentage-calculation/sssssjkt"/>
      <lastmod>2026-11-02T18:31:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/discount-and-tax-percentage-calculation/sssssjkt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discount-and-tax-percentage-calculation/sssssjkt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discount-and-tax-percentage-calculation/sssssjkt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discount-and-tax-percentage-calculation/sssssjkt"/>
      <lastmod>2026-11-02T18:31:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/connections-and-paths/sssssjkx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connections-and-paths/sssssjkx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connections-and-paths/sssssjkx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connections-and-paths/sssssjkx"/>
      <lastmod>2026-11-02T14:58:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/connections-and-paths/sssssjkx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connections-and-paths/sssssjkx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connections-and-paths/sssssjkx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connections-and-paths/sssssjkx"/>
      <lastmod>2026-11-02T14:58:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hole-2/sssssjki</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hole-2/sssssjki"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hole-2/sssssjki"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hole-2/sssssjki"/>
      <lastmod>2026-11-02T16:57:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hole-2/sssssjki</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hole-2/sssssjki"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hole-2/sssssjki"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hole-2/sssssjki"/>
      <lastmod>2026-11-02T16:57:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotational-symmetry-by-flee/sssssjko</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-flee/sssssjko"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-by-flee/sssssjko"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-flee/sssssjko"/>
      <lastmod>2026-11-02T18:40:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotational-symmetry-by-flee/sssssjko</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-flee/sssssjko"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-by-flee/sssssjko"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-flee/sssssjko"/>
      <lastmod>2026-11-02T18:40:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/non-differentiable-surface/sssssjzs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/non-differentiable-surface/sssssjzs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/non-differentiable-surface/sssssjzs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/non-differentiable-surface/sssssjzs"/>
      <lastmod>2026-11-01T21:28:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/non-differentiable-surface/sssssjzs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/non-differentiable-surface/sssssjzs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/non-differentiable-surface/sssssjzs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/non-differentiable-surface/sssssjzs"/>
      <lastmod>2026-11-01T21:28:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-addition-on-the-number-line/sssssjz7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-addition-on-the-number-line/sssssjz7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-addition-on-the-number-line/sssssjz7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-addition-on-the-number-line/sssssjz7"/>
      <lastmod>2026-11-02T18:50:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-addition-on-the-number-line/sssssjz7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-addition-on-the-number-line/sssssjz7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-addition-on-the-number-line/sssssjz7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-addition-on-the-number-line/sssssjz7"/>
      <lastmod>2026-11-02T18:50:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/place-value-disks/sssssjzn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/place-value-disks/sssssjzn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/place-value-disks/sssssjzn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/place-value-disks/sssssjzn"/>
      <lastmod>2026-11-02T18:55:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/place-value-disks/sssssjzn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/place-value-disks/sssssjzn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/place-value-disks/sssssjzn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/place-value-disks/sssssjzn"/>
      <lastmod>2026-11-02T18:55:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exact-trigonometric-values-on-unit-circle-radians/sssssjz2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exact-trigonometric-values-on-unit-circle-radians/sssssjz2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exact-trigonometric-values-on-unit-circle-radians/sssssjz2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exact-trigonometric-values-on-unit-circle-radians/sssssjz2"/>
      <lastmod>2026-11-02T00:37:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exact-trigonometric-values-on-unit-circle-radians/sssssjz2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exact-trigonometric-values-on-unit-circle-radians/sssssjz2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exact-trigonometric-values-on-unit-circle-radians/sssssjz2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exact-trigonometric-values-on-unit-circle-radians/sssssjz2"/>
      <lastmod>2026-11-02T00:37:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sets-and-subsets/sssssjzk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sets-and-subsets/sssssjzk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sets-and-subsets/sssssjzk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sets-and-subsets/sssssjzk"/>
      <lastmod>2026-11-02T18:03:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sets-and-subsets/sssssjzk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sets-and-subsets/sssssjzk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sets-and-subsets/sssssjzk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sets-and-subsets/sssssjzk"/>
      <lastmod>2026-11-02T18:03:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/half-chords-in-india/sssssjzz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/half-chords-in-india/sssssjzz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/half-chords-in-india/sssssjzz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/half-chords-in-india/sssssjzz"/>
      <lastmod>2026-11-01T23:41:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/half-chords-in-india/sssssjzz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/half-chords-in-india/sssssjzz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/half-chords-in-india/sssssjzz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/half-chords-in-india/sssssjzz"/>
      <lastmod>2026-11-01T23:41:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ratios-and-line-segments-v1/sssssjz0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratios-and-line-segments-v1/sssssjz0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratios-and-line-segments-v1/sssssjz0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratios-and-line-segments-v1/sssssjz0"/>
      <lastmod>2026-11-01T23:56:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ratios-and-line-segments-v1/sssssjz0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratios-and-line-segments-v1/sssssjz0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratios-and-line-segments-v1/sssssjz0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratios-and-line-segments-v1/sssssjz0"/>
      <lastmod>2026-11-01T23:56:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/subtraction-quiz-level-3/sssssjzd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtraction-quiz-level-3/sssssjzd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtraction-quiz-level-3/sssssjzd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtraction-quiz-level-3/sssssjzd"/>
      <lastmod>2026-11-02T09:07:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/subtraction-quiz-level-3/sssssjzd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtraction-quiz-level-3/sssssjzd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtraction-quiz-level-3/sssssjzd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtraction-quiz-level-3/sssssjzd"/>
      <lastmod>2026-11-02T09:07:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-midsegment-theorem-demo-with-additions/sssssjzf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-midsegment-theorem-demo-with-additions/sssssjzf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-midsegment-theorem-demo-with-additions/sssssjzf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-midsegment-theorem-demo-with-additions/sssssjzf"/>
      <lastmod>2026-11-02T16:56:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-midsegment-theorem-demo-with-additions/sssssjzf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-midsegment-theorem-demo-with-additions/sssssjzf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-midsegment-theorem-demo-with-additions/sssssjzf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-midsegment-theorem-demo-with-additions/sssssjzf"/>
      <lastmod>2026-11-02T16:56:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/light-reflection-and-refraction-geometry/sssssjz8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/light-reflection-and-refraction-geometry/sssssjz8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/light-reflection-and-refraction-geometry/sssssjz8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/light-reflection-and-refraction-geometry/sssssjz8"/>
      <lastmod>2026-11-02T02:23:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/light-reflection-and-refraction-geometry/sssssjz8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/light-reflection-and-refraction-geometry/sssssjz8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/light-reflection-and-refraction-geometry/sssssjz8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/light-reflection-and-refraction-geometry/sssssjz8"/>
      <lastmod>2026-11-02T02:23:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/developments-on-regular-polygons/sssssjzu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/developments-on-regular-polygons/sssssjzu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/developments-on-regular-polygons/sssssjzu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/developments-on-regular-polygons/sssssjzu"/>
      <lastmod>2026-11-02T02:35:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/developments-on-regular-polygons/sssssjzu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/developments-on-regular-polygons/sssssjzu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/developments-on-regular-polygons/sssssjzu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/developments-on-regular-polygons/sssssjzu"/>
      <lastmod>2026-11-02T02:35:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-graphs-8/sssssjz5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-graphs-8/sssssjz5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-graphs-8/sssssjz5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-graphs-8/sssssjz5"/>
      <lastmod>2026-11-01T21:17:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-graphs-8/sssssjz5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-graphs-8/sssssjz5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-graphs-8/sssssjz5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-graphs-8/sssssjz5"/>
      <lastmod>2026-11-01T21:17:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-sprinkler-problem/sssssjzb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-sprinkler-problem/sssssjzb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-sprinkler-problem/sssssjzb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-sprinkler-problem/sssssjzb"/>
      <lastmod>2026-11-01T23:47:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-sprinkler-problem/sssssjzb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-sprinkler-problem/sssssjzb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-sprinkler-problem/sssssjzb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-sprinkler-problem/sssssjzb"/>
      <lastmod>2026-11-01T23:47:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/swing-motion/sssssjz3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/swing-motion/sssssjz3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/swing-motion/sssssjz3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/swing-motion/sssssjz3"/>
      <lastmod>2026-11-01T21:06:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/swing-motion/sssssjz3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/swing-motion/sssssjz3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/swing-motion/sssssjz3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/swing-motion/sssssjz3"/>
      <lastmod>2026-11-01T21:06:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ordering-rational-numbers/sssssjzq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ordering-rational-numbers/sssssjzq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ordering-rational-numbers/sssssjzq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ordering-rational-numbers/sssssjzq"/>
      <lastmod>2026-11-01T23:53:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ordering-rational-numbers/sssssjzq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ordering-rational-numbers/sssssjzq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ordering-rational-numbers/sssssjzq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ordering-rational-numbers/sssssjzq"/>
      <lastmod>2026-11-01T23:53:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-demonstration-of-geometry-and-trigonometric-functions/sssssjz1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-demonstration-of-geometry-and-trigonometric-functions/sssssjz1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-demonstration-of-geometry-and-trigonometric-functions/sssssjz1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-demonstration-of-geometry-and-trigonometric-functions/sssssjz1"/>
      <lastmod>2026-11-02T17:07:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-demonstration-of-geometry-and-trigonometric-functions/sssssjz1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-demonstration-of-geometry-and-trigonometric-functions/sssssjz1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-demonstration-of-geometry-and-trigonometric-functions/sssssjz1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-demonstration-of-geometry-and-trigonometric-functions/sssssjz1"/>
      <lastmod>2026-11-02T17:07:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-cylinder/sssssjzm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cylinder/sssssjzm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cylinder/sssssjzm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cylinder/sssssjzm"/>
      <lastmod>2026-11-02T13:08:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-cylinder/sssssjzm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cylinder/sssssjzm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cylinder/sssssjzm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cylinder/sssssjzm"/>
      <lastmod>2026-11-02T13:08:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-exploration-of-polygons-and-orthocenters/sssssjzj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-polygons-and-orthocenters/sssssjzj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-exploration-of-polygons-and-orthocenters/sssssjzj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-polygons-and-orthocenters/sssssjzj"/>
      <lastmod>2026-11-02T18:05:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-exploration-of-polygons-and-orthocenters/sssssjzj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-polygons-and-orthocenters/sssssjzj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-exploration-of-polygons-and-orthocenters/sssssjzj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-polygons-and-orthocenters/sssssjzj"/>
      <lastmod>2026-11-02T18:05:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/double-integral-volume-demo-by-wuguoning/sssssjzp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-integral-volume-demo-by-wuguoning/sssssjzp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-integral-volume-demo-by-wuguoning/sssssjzp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-integral-volume-demo-by-wuguoning/sssssjzp"/>
      <lastmod>2026-11-01T20:58:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/double-integral-volume-demo-by-wuguoning/sssssjzp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-integral-volume-demo-by-wuguoning/sssssjzp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-integral-volume-demo-by-wuguoning/sssssjzp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-integral-volume-demo-by-wuguoning/sssssjzp"/>
      <lastmod>2026-11-01T20:58:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/factored-quartic-with-real-roots-visualization/sssssjzw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factored-quartic-with-real-roots-visualization/sssssjzw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factored-quartic-with-real-roots-visualization/sssssjzw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factored-quartic-with-real-roots-visualization/sssssjzw"/>
      <lastmod>2026-11-02T10:56:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/factored-quartic-with-real-roots-visualization/sssssjzw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factored-quartic-with-real-roots-visualization/sssssjzw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factored-quartic-with-real-roots-visualization/sssssjzw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factored-quartic-with-real-roots-visualization/sssssjzw"/>
      <lastmod>2026-11-02T10:56:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-and-prism-construction-demonstrating-geometric-concepts/sssssjz6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-and-prism-construction-demonstrating-geometric-concepts/sssssjz6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-and-prism-construction-demonstrating-geometric-concepts/sssssjz6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-and-prism-construction-demonstrating-geometric-concepts/sssssjz6"/>
      <lastmod>2026-11-02T00:44:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-and-prism-construction-demonstrating-geometric-concepts/sssssjz6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-and-prism-construction-demonstrating-geometric-concepts/sssssjz6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-and-prism-construction-demonstrating-geometric-concepts/sssssjz6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-and-prism-construction-demonstrating-geometric-concepts/sssssjz6"/>
      <lastmod>2026-11-02T00:44:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-intersections-hyperbolas-kites-and-geometric-constructions/sssssjzg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-intersections-hyperbolas-kites-and-geometric-constructions/sssssjzg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-intersections-hyperbolas-kites-and-geometric-constructions/sssssjzg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-intersections-hyperbolas-kites-and-geometric-constructions/sssssjzg"/>
      <lastmod>2026-11-01T19:21:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-intersections-hyperbolas-kites-and-geometric-constructions/sssssjzg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-intersections-hyperbolas-kites-and-geometric-constructions/sssssjzg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-intersections-hyperbolas-kites-and-geometric-constructions/sssssjzg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-intersections-hyperbolas-kites-and-geometric-constructions/sssssjzg"/>
      <lastmod>2026-11-01T19:21:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-ratios-for-angles-0-to-360/sssssjz9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-for-angles-0-to-360/sssssjz9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-for-angles-0-to-360/sssssjz9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-for-angles-0-to-360/sssssjz9"/>
      <lastmod>2026-11-02T02:14:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-ratios-for-angles-0-to-360/sssssjz9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-for-angles-0-to-360/sssssjz9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-for-angles-0-to-360/sssssjz9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-for-angles-0-to-360/sssssjz9"/>
      <lastmod>2026-11-02T02:14:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-trig-equations-sine-function/sssssjze</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-trig-equations-sine-function/sssssjze"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-trig-equations-sine-function/sssssjze"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-trig-equations-sine-function/sssssjze"/>
      <lastmod>2026-11-02T02:21:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-trig-equations-sine-function/sssssjze</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-trig-equations-sine-function/sssssjze"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-trig-equations-sine-function/sssssjze"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-trig-equations-sine-function/sssssjze"/>
      <lastmod>2026-11-02T02:21:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-reflections/sssssjzv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-reflections/sssssjzv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-reflections/sssssjzv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-reflections/sssssjzv"/>
      <lastmod>2026-11-02T18:10:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-reflections/sssssjzv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-reflections/sssssjzv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-reflections/sssssjzv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-reflections/sssssjzv"/>
      <lastmod>2026-11-02T18:10:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/real-number-system-sorting-interactive-demo/sssssjz4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/real-number-system-sorting-interactive-demo/sssssjz4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/real-number-system-sorting-interactive-demo/sssssjz4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/real-number-system-sorting-interactive-demo/sssssjz4"/>
      <lastmod>2026-11-01T19:05:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/real-number-system-sorting-interactive-demo/sssssjz4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/real-number-system-sorting-interactive-demo/sssssjz4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/real-number-system-sorting-interactive-demo/sssssjz4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/real-number-system-sorting-interactive-demo/sssssjz4"/>
      <lastmod>2026-11-01T19:05:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/numerical-ode-solver/sssssjzl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/numerical-ode-solver/sssssjzl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/numerical-ode-solver/sssssjzl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/numerical-ode-solver/sssssjzl"/>
      <lastmod>2026-11-02T18:33:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/numerical-ode-solver/sssssjzl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/numerical-ode-solver/sssssjzl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/numerical-ode-solver/sssssjzl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/numerical-ode-solver/sssssjzl"/>
      <lastmod>2026-11-02T18:33:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-demo-of-random-experiments-and-fractal-geometry/sssssjzy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demo-of-random-experiments-and-fractal-geometry/sssssjzy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demo-of-random-experiments-and-fractal-geometry/sssssjzy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demo-of-random-experiments-and-fractal-geometry/sssssjzy"/>
      <lastmod>2026-11-02T18:21:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-demo-of-random-experiments-and-fractal-geometry/sssssjzy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demo-of-random-experiments-and-fractal-geometry/sssssjzy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demo-of-random-experiments-and-fractal-geometry/sssssjzy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demo-of-random-experiments-and-fractal-geometry/sssssjzy"/>
      <lastmod>2026-11-02T18:21:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-coordinates-grapher/sssssjza</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-coordinates-grapher/sssssjza"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-coordinates-grapher/sssssjza"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-coordinates-grapher/sssssjza"/>
      <lastmod>2026-11-01T21:34:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-coordinates-grapher/sssssjza</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-coordinates-grapher/sssssjza"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-coordinates-grapher/sssssjza"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-coordinates-grapher/sssssjza"/>
      <lastmod>2026-11-01T21:34:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/calculating-area-of-a-parallelogram-by-lee-w-fisher/sssssjzc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-area-of-a-parallelogram-by-lee-w-fisher/sssssjzc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-area-of-a-parallelogram-by-lee-w-fisher/sssssjzc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-area-of-a-parallelogram-by-lee-w-fisher/sssssjzc"/>
      <lastmod>2026-11-02T17:51:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/calculating-area-of-a-parallelogram-by-lee-w-fisher/sssssjzc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-area-of-a-parallelogram-by-lee-w-fisher/sssssjzc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-area-of-a-parallelogram-by-lee-w-fisher/sssssjzc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-area-of-a-parallelogram-by-lee-w-fisher/sssssjzc"/>
      <lastmod>2026-11-02T17:51:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equal-vectors/sssssjzr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equal-vectors/sssssjzr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equal-vectors/sssssjzr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equal-vectors/sssssjzr"/>
      <lastmod>2026-11-02T03:14:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equal-vectors/sssssjzr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equal-vectors/sssssjzr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equal-vectors/sssssjzr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equal-vectors/sssssjzr"/>
      <lastmod>2026-11-02T03:14:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solid-of-revolution-generator/sssssjzh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solid-of-revolution-generator/sssssjzh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solid-of-revolution-generator/sssssjzh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solid-of-revolution-generator/sssssjzh"/>
      <lastmod>2026-11-01T21:00:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solid-of-revolution-generator/sssssjzh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solid-of-revolution-generator/sssssjzh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solid-of-revolution-generator/sssssjzh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solid-of-revolution-generator/sssssjzh"/>
      <lastmod>2026-11-01T21:00:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-perimeter/sssssjzt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-perimeter/sssssjzt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-perimeter/sssssjzt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-perimeter/sssssjzt"/>
      <lastmod>2026-11-02T09:07:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-perimeter/sssssjzt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-perimeter/sssssjzt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-perimeter/sssssjzt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-perimeter/sssssjzt"/>
      <lastmod>2026-11-02T09:07:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/xth-root-of-sin-and-tan/sssssjzx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/xth-root-of-sin-and-tan/sssssjzx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/xth-root-of-sin-and-tan/sssssjzx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/xth-root-of-sin-and-tan/sssssjzx"/>
      <lastmod>2026-11-01T23:52:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/xth-root-of-sin-and-tan/sssssjzx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/xth-root-of-sin-and-tan/sssssjzx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/xth-root-of-sin-and-tan/sssssjzx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/xth-root-of-sin-and-tan/sssssjzx"/>
      <lastmod>2026-11-01T23:52:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/guess-birthday-game/sssssjzi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/guess-birthday-game/sssssjzi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/guess-birthday-game/sssssjzi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/guess-birthday-game/sssssjzi"/>
      <lastmod>2026-11-02T09:36:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/guess-birthday-game/sssssjzi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/guess-birthday-game/sssssjzi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/guess-birthday-game/sssssjzi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/guess-birthday-game/sssssjzi"/>
      <lastmod>2026-11-02T09:36:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/chord-on-the-unit-circle/sssssjzo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chord-on-the-unit-circle/sssssjzo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chord-on-the-unit-circle/sssssjzo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chord-on-the-unit-circle/sssssjzo"/>
      <lastmod>2026-11-02T17:34:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/chord-on-the-unit-circle/sssssjzo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chord-on-the-unit-circle/sssssjzo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chord-on-the-unit-circle/sssssjzo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chord-on-the-unit-circle/sssssjzo"/>
      <lastmod>2026-11-02T17:34:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-logarithmic-functions-by-nick/sssssj0s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-logarithmic-functions-by-nick/sssssj0s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-logarithmic-functions-by-nick/sssssj0s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-logarithmic-functions-by-nick/sssssj0s"/>
      <lastmod>2026-11-02T15:47:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-logarithmic-functions-by-nick/sssssj0s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-logarithmic-functions-by-nick/sssssj0s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-logarithmic-functions-by-nick/sssssj0s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-logarithmic-functions-by-nick/sssssj0s"/>
      <lastmod>2026-11-02T15:47:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equivalent-fractions-circle-graphs/sssssj07</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-fractions-circle-graphs/sssssj07"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-fractions-circle-graphs/sssssj07"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-fractions-circle-graphs/sssssj07"/>
      <lastmod>2026-11-01T19:13:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equivalent-fractions-circle-graphs/sssssj07</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-fractions-circle-graphs/sssssj07"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-fractions-circle-graphs/sssssj07"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-fractions-circle-graphs/sssssj07"/>
      <lastmod>2026-11-01T19:13:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/limits-at-infinity-explorer/sssssj0n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-at-infinity-explorer/sssssj0n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-at-infinity-explorer/sssssj0n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-at-infinity-explorer/sssssj0n"/>
      <lastmod>2026-11-01T23:59:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/limits-at-infinity-explorer/sssssj0n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-at-infinity-explorer/sssssj0n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-at-infinity-explorer/sssssj0n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-at-infinity-explorer/sssssj0n"/>
      <lastmod>2026-11-01T23:59:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-a-cylinder/sssssj02</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-a-cylinder/sssssj02"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-a-cylinder/sssssj02"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-a-cylinder/sssssj02"/>
      <lastmod>2026-11-02T16:33:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-a-cylinder/sssssj02</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-a-cylinder/sssssj02"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-a-cylinder/sssssj02"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-a-cylinder/sssssj02"/>
      <lastmod>2026-11-02T16:33:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modular-multiplication-visualization/sssssj0k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modular-multiplication-visualization/sssssj0k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modular-multiplication-visualization/sssssj0k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modular-multiplication-visualization/sssssj0k"/>
      <lastmod>2026-11-02T16:46:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modular-multiplication-visualization/sssssj0k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modular-multiplication-visualization/sssssj0k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modular-multiplication-visualization/sssssj0k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modular-multiplication-visualization/sssssj0k"/>
      <lastmod>2026-11-02T16:46:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/display-cylinder-with-given-axis-and-radius/sssssj0z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/display-cylinder-with-given-axis-and-radius/sssssj0z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/display-cylinder-with-given-axis-and-radius/sssssj0z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/display-cylinder-with-given-axis-and-radius/sssssj0z"/>
      <lastmod>2026-11-02T12:07:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/display-cylinder-with-given-axis-and-radius/sssssj0z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/display-cylinder-with-given-axis-and-radius/sssssj0z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/display-cylinder-with-given-axis-and-radius/sssssj0z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/display-cylinder-with-given-axis-and-radius/sssssj0z"/>
      <lastmod>2026-11-02T12:07:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/whistler-applet-3-with-add-ons-for-multiplication/sssssj00</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/whistler-applet-3-with-add-ons-for-multiplication/sssssj00"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/whistler-applet-3-with-add-ons-for-multiplication/sssssj00"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/whistler-applet-3-with-add-ons-for-multiplication/sssssj00"/>
      <lastmod>2026-11-02T00:08:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/whistler-applet-3-with-add-ons-for-multiplication/sssssj00</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/whistler-applet-3-with-add-ons-for-multiplication/sssssj00"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/whistler-applet-3-with-add-ons-for-multiplication/sssssj00"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/whistler-applet-3-with-add-ons-for-multiplication/sssssj00"/>
      <lastmod>2026-11-02T00:08:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-opening-up-or-down-worksheet/sssssj0d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-opening-up-or-down-worksheet/sssssj0d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-opening-up-or-down-worksheet/sssssj0d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-opening-up-or-down-worksheet/sssssj0d"/>
      <lastmod>2026-11-02T16:55:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-opening-up-or-down-worksheet/sssssj0d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-opening-up-or-down-worksheet/sssssj0d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-opening-up-or-down-worksheet/sssssj0d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-opening-up-or-down-worksheet/sssssj0d"/>
      <lastmod>2026-11-02T16:55:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-roots-step-by-step/sssssj0f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-roots-step-by-step/sssssj0f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-roots-step-by-step/sssssj0f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-roots-step-by-step/sssssj0f"/>
      <lastmod>2026-11-02T17:03:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-roots-step-by-step/sssssj0f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-roots-step-by-step/sssssj0f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-roots-step-by-step/sssssj0f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-roots-step-by-step/sssssj0f"/>
      <lastmod>2026-11-02T17:03:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-multiplication/sssssj08</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-multiplication/sssssj08"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-multiplication/sssssj08"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-multiplication/sssssj08"/>
      <lastmod>2026-11-01T22:05:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-multiplication/sssssj08</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-multiplication/sssssj08"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-multiplication/sssssj08"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-multiplication/sssssj08"/>
      <lastmod>2026-11-01T22:05:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/squaring-the-function/sssssj0u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squaring-the-function/sssssj0u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squaring-the-function/sssssj0u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squaring-the-function/sssssj0u"/>
      <lastmod>2026-11-01T19:36:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/squaring-the-function/sssssj0u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squaring-the-function/sssssj0u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squaring-the-function/sssssj0u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squaring-the-function/sssssj0u"/>
      <lastmod>2026-11-01T19:36:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/six-basic-constructions/sssssj05</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/six-basic-constructions/sssssj05"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/six-basic-constructions/sssssj05"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/six-basic-constructions/sssssj05"/>
      <lastmod>2026-11-02T18:50:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/six-basic-constructions/sssssj05</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/six-basic-constructions/sssssj05"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/six-basic-constructions/sssssj05"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/six-basic-constructions/sssssj05"/>
      <lastmod>2026-11-02T18:50:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/statistics-boxplot-example/sssssj0b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/statistics-boxplot-example/sssssj0b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/statistics-boxplot-example/sssssj0b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/statistics-boxplot-example/sssssj0b"/>
      <lastmod>2026-11-01T19:00:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/statistics-boxplot-example/sssssj0b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/statistics-boxplot-example/sssssj0b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/statistics-boxplot-example/sssssj0b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/statistics-boxplot-example/sssssj0b"/>
      <lastmod>2026-11-01T19:00:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/restrictions-on-spherical-coordinates/sssssj03</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/restrictions-on-spherical-coordinates/sssssj03"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/restrictions-on-spherical-coordinates/sssssj03"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/restrictions-on-spherical-coordinates/sssssj03"/>
      <lastmod>2026-11-02T02:38:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/restrictions-on-spherical-coordinates/sssssj03</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/restrictions-on-spherical-coordinates/sssssj03"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/restrictions-on-spherical-coordinates/sssssj03"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/restrictions-on-spherical-coordinates/sssssj03"/>
      <lastmod>2026-11-02T02:38:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rate-of-change-of-volume-in-melting-ice-cube/sssssj0q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rate-of-change-of-volume-in-melting-ice-cube/sssssj0q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rate-of-change-of-volume-in-melting-ice-cube/sssssj0q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rate-of-change-of-volume-in-melting-ice-cube/sssssj0q"/>
      <lastmod>2026-11-02T16:55:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rate-of-change-of-volume-in-melting-ice-cube/sssssj0q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rate-of-change-of-volume-in-melting-ice-cube/sssssj0q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rate-of-change-of-volume-in-melting-ice-cube/sssssj0q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rate-of-change-of-volume-in-melting-ice-cube/sssssj0q"/>
      <lastmod>2026-11-02T16:55:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-volume-calculation-demo-by-treyfallon/sssssj01</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-demo-by-treyfallon/sssssj01"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-volume-calculation-demo-by-treyfallon/sssssj01"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-demo-by-treyfallon/sssssj01"/>
      <lastmod>2026-11-02T11:45:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-volume-calculation-demo-by-treyfallon/sssssj01</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-demo-by-treyfallon/sssssj01"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-volume-calculation-demo-by-treyfallon/sssssj01"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-demo-by-treyfallon/sssssj01"/>
      <lastmod>2026-11-02T11:45:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/center-spread-exploration-mean-median-quartiles-and-standard-deviation/sssssj0m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/center-spread-exploration-mean-median-quartiles-and-standard-deviation/sssssj0m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/center-spread-exploration-mean-median-quartiles-and-standard-deviation/sssssj0m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/center-spread-exploration-mean-median-quartiles-and-standard-deviation/sssssj0m"/>
      <lastmod>2026-11-02T18:36:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/center-spread-exploration-mean-median-quartiles-and-standard-deviation/sssssj0m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/center-spread-exploration-mean-median-quartiles-and-standard-deviation/sssssj0m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/center-spread-exploration-mean-median-quartiles-and-standard-deviation/sssssj0m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/center-spread-exploration-mean-median-quartiles-and-standard-deviation/sssssj0m"/>
      <lastmod>2026-11-02T18:36:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dancing-cubes-on-torus-knots/sssssj0j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dancing-cubes-on-torus-knots/sssssj0j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dancing-cubes-on-torus-knots/sssssj0j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dancing-cubes-on-torus-knots/sssssj0j"/>
      <lastmod>2026-11-02T00:07:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dancing-cubes-on-torus-knots/sssssj0j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dancing-cubes-on-torus-knots/sssssj0j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dancing-cubes-on-torus-knots/sssssj0j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dancing-cubes-on-torus-knots/sssssj0j"/>
      <lastmod>2026-11-02T00:07:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-a-hypercube-by-matthew-kennedy-dr-k/sssssj0p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-a-hypercube-by-matthew-kennedy-dr-k/sssssj0p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-a-hypercube-by-matthew-kennedy-dr-k/sssssj0p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-a-hypercube-by-matthew-kennedy-dr-k/sssssj0p"/>
      <lastmod>2026-11-02T14:57:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-a-hypercube-by-matthew-kennedy-dr-k/sssssj0p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-a-hypercube-by-matthew-kennedy-dr-k/sssssj0p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-a-hypercube-by-matthew-kennedy-dr-k/sssssj0p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-a-hypercube-by-matthew-kennedy-dr-k/sssssj0p"/>
      <lastmod>2026-11-02T14:57:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mtz-moore-polynomial-functions/sssssj0w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mtz-moore-polynomial-functions/sssssj0w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mtz-moore-polynomial-functions/sssssj0w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mtz-moore-polynomial-functions/sssssj0w"/>
      <lastmod>2026-11-02T00:55:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mtz-moore-polynomial-functions/sssssj0w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mtz-moore-polynomial-functions/sssssj0w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mtz-moore-polynomial-functions/sssssj0w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mtz-moore-polynomial-functions/sssssj0w"/>
      <lastmod>2026-11-02T00:55:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-x/sssssj06</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-x/sssssj06"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-x/sssssj06"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-x/sssssj06"/>
      <lastmod>2026-11-02T00:39:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-of-x/sssssj06</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-x/sssssj06"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-x/sssssj06"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-x/sssssj06"/>
      <lastmod>2026-11-02T00:39:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dividing-a-cube-into-pyramids/sssssj0g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dividing-a-cube-into-pyramids/sssssj0g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dividing-a-cube-into-pyramids/sssssj0g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dividing-a-cube-into-pyramids/sssssj0g"/>
      <lastmod>2026-11-02T00:21:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dividing-a-cube-into-pyramids/sssssj0g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dividing-a-cube-into-pyramids/sssssj0g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dividing-a-cube-into-pyramids/sssssj0g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dividing-a-cube-into-pyramids/sssssj0g"/>
      <lastmod>2026-11-02T00:21:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-angle-bisectors/sssssj09</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-angle-bisectors/sssssj09"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-angle-bisectors/sssssj09"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-angle-bisectors/sssssj09"/>
      <lastmod>2026-11-02T09:38:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-angle-bisectors/sssssj09</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-angle-bisectors/sssssj09"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-angle-bisectors/sssssj09"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-angle-bisectors/sssssj09"/>
      <lastmod>2026-11-02T09:38:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polynomial-simplification-practice-ns2-05-cyu1/sssssj0e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-simplification-practice-ns2-05-cyu1/sssssj0e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-simplification-practice-ns2-05-cyu1/sssssj0e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-simplification-practice-ns2-05-cyu1/sssssj0e"/>
      <lastmod>2026-11-02T02:53:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polynomial-simplification-practice-ns2-05-cyu1/sssssj0e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-simplification-practice-ns2-05-cyu1/sssssj0e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-simplification-practice-ns2-05-cyu1/sssssj0e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-simplification-practice-ns2-05-cyu1/sssssj0e"/>
      <lastmod>2026-11-02T02:53:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fun-with-lines-and-modular-arithmetic/sssssj0v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fun-with-lines-and-modular-arithmetic/sssssj0v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fun-with-lines-and-modular-arithmetic/sssssj0v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fun-with-lines-and-modular-arithmetic/sssssj0v"/>
      <lastmod>2026-11-02T17:51:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fun-with-lines-and-modular-arithmetic/sssssj0v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fun-with-lines-and-modular-arithmetic/sssssj0v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fun-with-lines-and-modular-arithmetic/sssssj0v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fun-with-lines-and-modular-arithmetic/sssssj0v"/>
      <lastmod>2026-11-02T17:51:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-calculator-by-aprilhone/sssssj04</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-calculator-by-aprilhone/sssssj04"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-calculator-by-aprilhone/sssssj04"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-calculator-by-aprilhone/sssssj04"/>
      <lastmod>2026-11-02T16:30:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-calculator-by-aprilhone/sssssj04</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-calculator-by-aprilhone/sssssj04"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-calculator-by-aprilhone/sssssj04"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-calculator-by-aprilhone/sssssj04"/>
      <lastmod>2026-11-02T16:30:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rods-n-cubes-addition-visualizing-3d-vectors-and-volume/sssssj0l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rods-n-cubes-addition-visualizing-3d-vectors-and-volume/sssssj0l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rods-n-cubes-addition-visualizing-3d-vectors-and-volume/sssssj0l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rods-n-cubes-addition-visualizing-3d-vectors-and-volume/sssssj0l"/>
      <lastmod>2026-11-02T00:42:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rods-n-cubes-addition-visualizing-3d-vectors-and-volume/sssssj0l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rods-n-cubes-addition-visualizing-3d-vectors-and-volume/sssssj0l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rods-n-cubes-addition-visualizing-3d-vectors-and-volume/sssssj0l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rods-n-cubes-addition-visualizing-3d-vectors-and-volume/sssssj0l"/>
      <lastmod>2026-11-02T00:42:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/representing-fractions-on-number-line/sssssj0y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/representing-fractions-on-number-line/sssssj0y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/representing-fractions-on-number-line/sssssj0y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/representing-fractions-on-number-line/sssssj0y"/>
      <lastmod>2026-11-02T18:37:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/representing-fractions-on-number-line/sssssj0y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/representing-fractions-on-number-line/sssssj0y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/representing-fractions-on-number-line/sssssj0y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/representing-fractions-on-number-line/sssssj0y"/>
      <lastmod>2026-11-02T18:37:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solids-formed-by-prism-stacking/sssssj0a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solids-formed-by-prism-stacking/sssssj0a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solids-formed-by-prism-stacking/sssssj0a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solids-formed-by-prism-stacking/sssssj0a"/>
      <lastmod>2026-11-02T16:56:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solids-formed-by-prism-stacking/sssssj0a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solids-formed-by-prism-stacking/sssssj0a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solids-formed-by-prism-stacking/sssssj0a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solids-formed-by-prism-stacking/sssssj0a"/>
      <lastmod>2026-11-02T16:56:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-samples/sssssj0c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-samples/sssssj0c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-samples/sssssj0c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-samples/sssssj0c"/>
      <lastmod>2026-11-02T02:22:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-samples/sssssj0c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-samples/sssssj0c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-samples/sssssj0c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-samples/sssssj0c"/>
      <lastmod>2026-11-02T02:22:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tetrahedrons-and-diamonds/sssssj0r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tetrahedrons-and-diamonds/sssssj0r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tetrahedrons-and-diamonds/sssssj0r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tetrahedrons-and-diamonds/sssssj0r"/>
      <lastmod>2026-11-02T15:04:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tetrahedrons-and-diamonds/sssssj0r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tetrahedrons-and-diamonds/sssssj0r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tetrahedrons-and-diamonds/sssssj0r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tetrahedrons-and-diamonds/sssssj0r"/>
      <lastmod>2026-11-02T15:04:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-incircle-and-excircle-relationship/sssssj0h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-incircle-and-excircle-relationship/sssssj0h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-incircle-and-excircle-relationship/sssssj0h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-incircle-and-excircle-relationship/sssssj0h"/>
      <lastmod>2026-11-02T17:09:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-incircle-and-excircle-relationship/sssssj0h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-incircle-and-excircle-relationship/sssssj0h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-incircle-and-excircle-relationship/sssssj0h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-incircle-and-excircle-relationship/sssssj0h"/>
      <lastmod>2026-11-02T17:09:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/double-number-line-tool-fractions/sssssj0t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-number-line-tool-fractions/sssssj0t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-number-line-tool-fractions/sssssj0t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-number-line-tool-fractions/sssssj0t"/>
      <lastmod>2026-11-02T18:39:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/double-number-line-tool-fractions/sssssj0t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-number-line-tool-fractions/sssssj0t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-number-line-tool-fractions/sssssj0t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-number-line-tool-fractions/sssssj0t"/>
      <lastmod>2026-11-02T18:39:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construct-an-inscribed-circle/sssssj0x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-an-inscribed-circle/sssssj0x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-an-inscribed-circle/sssssj0x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-an-inscribed-circle/sssssj0x"/>
      <lastmod>2026-11-02T18:23:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construct-an-inscribed-circle/sssssj0x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-an-inscribed-circle/sssssj0x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-an-inscribed-circle/sssssj0x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-an-inscribed-circle/sssssj0x"/>
      <lastmod>2026-11-02T18:23:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-programming-and-triangle-area/sssssj0i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-programming-and-triangle-area/sssssj0i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-programming-and-triangle-area/sssssj0i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-programming-and-triangle-area/sssssj0i"/>
      <lastmod>2026-11-02T17:17:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-programming-and-triangle-area/sssssj0i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-programming-and-triangle-area/sssssj0i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-programming-and-triangle-area/sssssj0i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-programming-and-triangle-area/sssssj0i"/>
      <lastmod>2026-11-02T17:17:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/respiradero-surface-parametric-surface-construction-in-geogebra/sssssj0o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/respiradero-surface-parametric-surface-construction-in-geogebra/sssssj0o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/respiradero-surface-parametric-surface-construction-in-geogebra/sssssj0o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/respiradero-surface-parametric-surface-construction-in-geogebra/sssssj0o"/>
      <lastmod>2026-11-02T00:28:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/respiradero-surface-parametric-surface-construction-in-geogebra/sssssj0o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/respiradero-surface-parametric-surface-construction-in-geogebra/sssssj0o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/respiradero-surface-parametric-surface-construction-in-geogebra/sssssj0o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/respiradero-surface-parametric-surface-construction-in-geogebra/sssssj0o"/>
      <lastmod>2026-11-02T00:28:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflectional-symmetry-of-regular-polygons/sssssjds</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflectional-symmetry-of-regular-polygons/sssssjds"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflectional-symmetry-of-regular-polygons/sssssjds"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflectional-symmetry-of-regular-polygons/sssssjds"/>
      <lastmod>2026-11-01T21:15:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflectional-symmetry-of-regular-polygons/sssssjds</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflectional-symmetry-of-regular-polygons/sssssjds"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflectional-symmetry-of-regular-polygons/sssssjds"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflectional-symmetry-of-regular-polygons/sssssjds"/>
      <lastmod>2026-11-01T21:15:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-example/sssssjd7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-example/sssssjd7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-example/sssssjd7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-example/sssssjd7"/>
      <lastmod>2026-11-02T09:12:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-example/sssssjd7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-example/sssssjd7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-example/sssssjd7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-example/sssssjd7"/>
      <lastmod>2026-11-02T09:12:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/application-of-vectors-in-physics-by-alfredo/sssssjdn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/application-of-vectors-in-physics-by-alfredo/sssssjdn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/application-of-vectors-in-physics-by-alfredo/sssssjdn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/application-of-vectors-in-physics-by-alfredo/sssssjdn"/>
      <lastmod>2026-11-01T19:28:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/application-of-vectors-in-physics-by-alfredo/sssssjdn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/application-of-vectors-in-physics-by-alfredo/sssssjdn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/application-of-vectors-in-physics-by-alfredo/sssssjdn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/application-of-vectors-in-physics-by-alfredo/sssssjdn"/>
      <lastmod>2026-11-01T19:28:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponents-product-rule-interactive-visualization/sssssjd2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponents-product-rule-interactive-visualization/sssssjd2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponents-product-rule-interactive-visualization/sssssjd2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponents-product-rule-interactive-visualization/sssssjd2"/>
      <lastmod>2026-11-02T13:32:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponents-product-rule-interactive-visualization/sssssjd2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponents-product-rule-interactive-visualization/sssssjd2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponents-product-rule-interactive-visualization/sssssjd2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponents-product-rule-interactive-visualization/sssssjd2"/>
      <lastmod>2026-11-02T13:32:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/freehand-pottery-bowl-surface-of-revolution/sssssjdk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/freehand-pottery-bowl-surface-of-revolution/sssssjdk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/freehand-pottery-bowl-surface-of-revolution/sssssjdk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/freehand-pottery-bowl-surface-of-revolution/sssssjdk"/>
      <lastmod>2026-11-01T23:13:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/freehand-pottery-bowl-surface-of-revolution/sssssjdk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/freehand-pottery-bowl-surface-of-revolution/sssssjdk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/freehand-pottery-bowl-surface-of-revolution/sssssjdk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/freehand-pottery-bowl-surface-of-revolution/sssssjdk"/>
      <lastmod>2026-11-01T23:13:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rgb-color-model/sssssjdz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rgb-color-model/sssssjdz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rgb-color-model/sssssjdz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rgb-color-model/sssssjdz"/>
      <lastmod>2026-11-02T08:48:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rgb-color-model/sssssjdz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rgb-color-model/sssssjdz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rgb-color-model/sssssjdz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rgb-color-model/sssssjdz"/>
      <lastmod>2026-11-02T08:48:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-calculation-demo-by-valerie-granger/sssssjd0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-calculation-demo-by-valerie-granger/sssssjd0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-calculation-demo-by-valerie-granger/sssssjd0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-calculation-demo-by-valerie-granger/sssssjd0"/>
      <lastmod>2026-11-02T02:40:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-calculation-demo-by-valerie-granger/sssssjd0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-calculation-demo-by-valerie-granger/sssssjd0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-calculation-demo-by-valerie-granger/sssssjd0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-calculation-demo-by-valerie-granger/sssssjd0"/>
      <lastmod>2026-11-02T02:40:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conic-section-exploration/sssssjdd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-section-exploration/sssssjdd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-section-exploration/sssssjdd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-section-exploration/sssssjdd"/>
      <lastmod>2026-11-02T18:21:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conic-section-exploration/sssssjdd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-section-exploration/sssssjdd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-section-exploration/sssssjdd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-section-exploration/sssssjdd"/>
      <lastmod>2026-11-02T18:21:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translated-graphs/sssssjdf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translated-graphs/sssssjdf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translated-graphs/sssssjdf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translated-graphs/sssssjdf"/>
      <lastmod>2026-11-01T23:41:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translated-graphs/sssssjdf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translated-graphs/sssssjdf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translated-graphs/sssssjdf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translated-graphs/sssssjdf"/>
      <lastmod>2026-11-01T23:41:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-way-table-probability-analysis/sssssjd8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-way-table-probability-analysis/sssssjd8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-way-table-probability-analysis/sssssjd8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-way-table-probability-analysis/sssssjd8"/>
      <lastmod>2026-11-01T22:02:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-way-table-probability-analysis/sssssjd8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-way-table-probability-analysis/sssssjd8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-way-table-probability-analysis/sssssjd8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-way-table-probability-analysis/sssssjd8"/>
      <lastmod>2026-11-01T22:02:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/illustrating-addition-and-subtraction-of-proper-fractions-by-ahlin87/sssssjdu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/illustrating-addition-and-subtraction-of-proper-fractions-by-ahlin87/sssssjdu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/illustrating-addition-and-subtraction-of-proper-fractions-by-ahlin87/sssssjdu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/illustrating-addition-and-subtraction-of-proper-fractions-by-ahlin87/sssssjdu"/>
      <lastmod>2026-11-01T20:52:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/illustrating-addition-and-subtraction-of-proper-fractions-by-ahlin87/sssssjdu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/illustrating-addition-and-subtraction-of-proper-fractions-by-ahlin87/sssssjdu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/illustrating-addition-and-subtraction-of-proper-fractions-by-ahlin87/sssssjdu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/illustrating-addition-and-subtraction-of-proper-fractions-by-ahlin87/sssssjdu"/>
      <lastmod>2026-11-01T20:52:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/algebraic-puzzle-development/sssssjd5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebraic-puzzle-development/sssssjd5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebraic-puzzle-development/sssssjd5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebraic-puzzle-development/sssssjd5"/>
      <lastmod>2026-11-01T21:07:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/algebraic-puzzle-development/sssssjd5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebraic-puzzle-development/sssssjd5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebraic-puzzle-development/sssssjd5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebraic-puzzle-development/sssssjd5"/>
      <lastmod>2026-11-01T21:07:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-inequality-generator-variable-on-both-sides/sssssjdb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-inequality-generator-variable-on-both-sides/sssssjdb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-inequality-generator-variable-on-both-sides/sssssjdb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-inequality-generator-variable-on-both-sides/sssssjdb"/>
      <lastmod>2026-11-01T21:40:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-inequality-generator-variable-on-both-sides/sssssjdb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-inequality-generator-variable-on-both-sides/sssssjdb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-inequality-generator-variable-on-both-sides/sssssjdb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-inequality-generator-variable-on-both-sides/sssssjdb"/>
      <lastmod>2026-11-01T21:40:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exercise-8-cosine-rule-similarity-transformation/sssssjd3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-8-cosine-rule-similarity-transformation/sssssjd3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-8-cosine-rule-similarity-transformation/sssssjd3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-8-cosine-rule-similarity-transformation/sssssjd3"/>
      <lastmod>2026-11-02T18:16:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exercise-8-cosine-rule-similarity-transformation/sssssjd3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-8-cosine-rule-similarity-transformation/sssssjd3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-8-cosine-rule-similarity-transformation/sssssjd3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-8-cosine-rule-similarity-transformation/sssssjd3"/>
      <lastmod>2026-11-02T18:16:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-volume-demonstration-by-tkh/sssssjdq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-volume-demonstration-by-tkh/sssssjdq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-volume-demonstration-by-tkh/sssssjdq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-volume-demonstration-by-tkh/sssssjdq"/>
      <lastmod>2026-11-01T23:42:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-volume-demonstration-by-tkh/sssssjdq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-volume-demonstration-by-tkh/sssssjdq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-volume-demonstration-by-tkh/sssssjdq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-volume-demonstration-by-tkh/sssssjdq"/>
      <lastmod>2026-11-01T23:42:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplication-quiz-geometric-and-functional-exploration/sssssjd1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-quiz-geometric-and-functional-exploration/sssssjd1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-quiz-geometric-and-functional-exploration/sssssjd1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-quiz-geometric-and-functional-exploration/sssssjd1"/>
      <lastmod>2026-11-02T00:44:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplication-quiz-geometric-and-functional-exploration/sssssjd1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-quiz-geometric-and-functional-exploration/sssssjd1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-quiz-geometric-and-functional-exploration/sssssjd1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-quiz-geometric-and-functional-exploration/sssssjd1"/>
      <lastmod>2026-11-02T00:44:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/histogram-with-equal-class-intervals/sssssjdm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-with-equal-class-intervals/sssssjdm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-with-equal-class-intervals/sssssjdm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-with-equal-class-intervals/sssssjdm"/>
      <lastmod>2026-11-02T00:28:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/histogram-with-equal-class-intervals/sssssjdm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-with-equal-class-intervals/sssssjdm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-with-equal-class-intervals/sssssjdm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-with-equal-class-intervals/sssssjdm"/>
      <lastmod>2026-11-02T00:28:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/same-side-interior-angles-investigation/sssssjdj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/same-side-interior-angles-investigation/sssssjdj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/same-side-interior-angles-investigation/sssssjdj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/same-side-interior-angles-investigation/sssssjdj"/>
      <lastmod>2026-11-02T13:16:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/same-side-interior-angles-investigation/sssssjdj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/same-side-interior-angles-investigation/sssssjdj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/same-side-interior-angles-investigation/sssssjdj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/same-side-interior-angles-investigation/sssssjdj"/>
      <lastmod>2026-11-02T13:16:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/three-unit-length-complex-numbers/sssssjdp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-unit-length-complex-numbers/sssssjdp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-unit-length-complex-numbers/sssssjdp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-unit-length-complex-numbers/sssssjdp"/>
      <lastmod>2026-11-02T18:03:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/three-unit-length-complex-numbers/sssssjdp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-unit-length-complex-numbers/sssssjdp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-unit-length-complex-numbers/sssssjdp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-unit-length-complex-numbers/sssssjdp"/>
      <lastmod>2026-11-02T18:03:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/horizontal-translations-of-quadratic-functions/sssssjdw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-translations-of-quadratic-functions/sssssjdw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-translations-of-quadratic-functions/sssssjdw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-translations-of-quadratic-functions/sssssjdw"/>
      <lastmod>2026-11-02T10:42:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/horizontal-translations-of-quadratic-functions/sssssjdw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-translations-of-quadratic-functions/sssssjdw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-translations-of-quadratic-functions/sssssjdw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-translations-of-quadratic-functions/sssssjdw"/>
      <lastmod>2026-11-02T10:42:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-cross-product/sssssjd6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-cross-product/sssssjd6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-cross-product/sssssjd6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-cross-product/sssssjd6"/>
      <lastmod>2026-11-02T16:52:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-cross-product/sssssjd6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-cross-product/sssssjd6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-cross-product/sssssjd6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-cross-product/sssssjd6"/>
      <lastmod>2026-11-02T16:52:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotationally-symmetric-dragon-with-4-heads/sssssjdg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotationally-symmetric-dragon-with-4-heads/sssssjdg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotationally-symmetric-dragon-with-4-heads/sssssjdg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotationally-symmetric-dragon-with-4-heads/sssssjdg"/>
      <lastmod>2026-11-01T21:10:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotationally-symmetric-dragon-with-4-heads/sssssjdg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotationally-symmetric-dragon-with-4-heads/sssssjdg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotationally-symmetric-dragon-with-4-heads/sssssjdg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotationally-symmetric-dragon-with-4-heads/sssssjdg"/>
      <lastmod>2026-11-01T21:10:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/phase-plane-system-of-differential-equations/sssssjd9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phase-plane-system-of-differential-equations/sssssjd9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phase-plane-system-of-differential-equations/sssssjd9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phase-plane-system-of-differential-equations/sssssjd9"/>
      <lastmod>2026-11-01T19:14:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/phase-plane-system-of-differential-equations/sssssjd9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phase-plane-system-of-differential-equations/sssssjd9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phase-plane-system-of-differential-equations/sssssjd9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phase-plane-system-of-differential-equations/sssssjd9"/>
      <lastmod>2026-11-01T19:14:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parametric-curves-with-trig-variations/sssssjde</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-curves-with-trig-variations/sssssjde"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-curves-with-trig-variations/sssssjde"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-curves-with-trig-variations/sssssjde"/>
      <lastmod>2026-11-02T11:04:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parametric-curves-with-trig-variations/sssssjde</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-curves-with-trig-variations/sssssjde"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-curves-with-trig-variations/sssssjde"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-curves-with-trig-variations/sssssjde"/>
      <lastmod>2026-11-02T11:04:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cats-on-ladder/sssssjdv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cats-on-ladder/sssssjdv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cats-on-ladder/sssssjdv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cats-on-ladder/sssssjdv"/>
      <lastmod>2026-11-02T17:37:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cats-on-ladder/sssssjdv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cats-on-ladder/sssssjdv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cats-on-ladder/sssssjdv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cats-on-ladder/sssssjdv"/>
      <lastmod>2026-11-02T17:37:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-formula-quiz/sssssjd4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-formula-quiz/sssssjd4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-formula-quiz/sssssjd4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-formula-quiz/sssssjd4"/>
      <lastmod>2026-11-01T21:08:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-formula-quiz/sssssjd4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-formula-quiz/sssssjd4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-formula-quiz/sssssjd4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-formula-quiz/sssssjd4"/>
      <lastmod>2026-11-01T21:08:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-net-visualization/sssssjdl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-net-visualization/sssssjdl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-net-visualization/sssssjdl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-net-visualization/sssssjdl"/>
      <lastmod>2026-11-01T21:00:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-net-visualization/sssssjdl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-net-visualization/sssssjdl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-net-visualization/sssssjdl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-net-visualization/sssssjdl"/>
      <lastmod>2026-11-01T21:00:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/euler-s-theorem-multiple-geometric-demonstrations-triangle-circles-and-const/sssssjdy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euler-s-theorem-multiple-geometric-demonstrations-triangle-circles-and-const/sssssjdy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euler-s-theorem-multiple-geometric-demonstrations-triangle-circles-and-const/sssssjdy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euler-s-theorem-multiple-geometric-demonstrations-triangle-circles-and-const/sssssjdy"/>
      <lastmod>2026-11-02T18:24:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/euler-s-theorem-multiple-geometric-demonstrations-triangle-circles-and-const/sssssjdy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euler-s-theorem-multiple-geometric-demonstrations-triangle-circles-and-const/sssssjdy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euler-s-theorem-multiple-geometric-demonstrations-triangle-circles-and-const/sssssjdy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euler-s-theorem-multiple-geometric-demonstrations-triangle-circles-and-const/sssssjdy"/>
      <lastmod>2026-11-02T18:24:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstrating-fraction-division/sssssjda</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-fraction-division/sssssjda"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-fraction-division/sssssjda"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-fraction-division/sssssjda"/>
      <lastmod>2026-11-02T18:26:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstrating-fraction-division/sssssjda</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-fraction-division/sssssjda"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-fraction-division/sssssjda"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-fraction-division/sssssjda"/>
      <lastmod>2026-11-02T18:26:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-of-a-right-triangle-by-121634/sssssjdc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-right-triangle-by-121634/sssssjdc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-right-triangle-by-121634/sssssjdc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-right-triangle-by-121634/sssssjdc"/>
      <lastmod>2026-11-02T18:36:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-of-a-right-triangle-by-121634/sssssjdc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-right-triangle-by-121634/sssssjdc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-right-triangle-by-121634/sssssjdc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-right-triangle-by-121634/sssssjdc"/>
      <lastmod>2026-11-02T18:36:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/how-quantities-relate/sssssjdr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-quantities-relate/sssssjdr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-quantities-relate/sssssjdr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-quantities-relate/sssssjdr"/>
      <lastmod>2026-11-02T16:33:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/how-quantities-relate/sssssjdr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-quantities-relate/sssssjdr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-quantities-relate/sssssjdr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-quantities-relate/sssssjdr"/>
      <lastmod>2026-11-02T16:33:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/duplicate-a-line-segment-by-linda-bollman/sssssjdh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/duplicate-a-line-segment-by-linda-bollman/sssssjdh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/duplicate-a-line-segment-by-linda-bollman/sssssjdh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/duplicate-a-line-segment-by-linda-bollman/sssssjdh"/>
      <lastmod>2026-11-02T17:34:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/duplicate-a-line-segment-by-linda-bollman/sssssjdh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/duplicate-a-line-segment-by-linda-bollman/sssssjdh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/duplicate-a-line-segment-by-linda-bollman/sssssjdh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/duplicate-a-line-segment-by-linda-bollman/sssssjdh"/>
      <lastmod>2026-11-02T17:34:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-trapezium-duplication-dynamic-geometric-construction/sssssjdt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-trapezium-duplication-dynamic-geometric-construction/sssssjdt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-trapezium-duplication-dynamic-geometric-construction/sssssjdt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-trapezium-duplication-dynamic-geometric-construction/sssssjdt"/>
      <lastmod>2026-11-02T08:55:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-trapezium-duplication-dynamic-geometric-construction/sssssjdt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-trapezium-duplication-dynamic-geometric-construction/sssssjdt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-trapezium-duplication-dynamic-geometric-construction/sssssjdt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-trapezium-duplication-dynamic-geometric-construction/sssssjdt"/>
      <lastmod>2026-11-02T08:55:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/root-rectangles-4-8/sssssjdx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/root-rectangles-4-8/sssssjdx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/root-rectangles-4-8/sssssjdx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/root-rectangles-4-8/sssssjdx"/>
      <lastmod>2026-11-01T23:24:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/root-rectangles-4-8/sssssjdx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/root-rectangles-4-8/sssssjdx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/root-rectangles-4-8/sssssjdx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/root-rectangles-4-8/sssssjdx"/>
      <lastmod>2026-11-01T23:24:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sketching-second-derivatives/sssssjdi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sketching-second-derivatives/sssssjdi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sketching-second-derivatives/sssssjdi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sketching-second-derivatives/sssssjdi"/>
      <lastmod>2026-11-02T13:05:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sketching-second-derivatives/sssssjdi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sketching-second-derivatives/sssssjdi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sketching-second-derivatives/sssssjdi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sketching-second-derivatives/sssssjdi"/>
      <lastmod>2026-11-02T13:05:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-and-deltoid-kite-geometric-construction/sssssjdo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-and-deltoid-kite-geometric-construction/sssssjdo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-and-deltoid-kite-geometric-construction/sssssjdo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-and-deltoid-kite-geometric-construction/sssssjdo"/>
      <lastmod>2026-11-02T18:28:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-and-deltoid-kite-geometric-construction/sssssjdo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-and-deltoid-kite-geometric-construction/sssssjdo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-and-deltoid-kite-geometric-construction/sssssjdo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-and-deltoid-kite-geometric-construction/sssssjdo"/>
      <lastmod>2026-11-02T18:28:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graph-the-line/sssssjfs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-the-line/sssssjfs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-the-line/sssssjfs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-the-line/sssssjfs"/>
      <lastmod>2026-11-01T21:30:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graph-the-line/sssssjfs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-the-line/sssssjfs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-the-line/sssssjfs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-the-line/sssssjfs"/>
      <lastmod>2026-11-01T21:30:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-extremes-of-inequalities-in-variables-x-and-y/sssssjf7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-extremes-of-inequalities-in-variables-x-and-y/sssssjf7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-extremes-of-inequalities-in-variables-x-and-y/sssssjf7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-extremes-of-inequalities-in-variables-x-and-y/sssssjf7"/>
      <lastmod>2026-11-01T19:15:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-extremes-of-inequalities-in-variables-x-and-y/sssssjf7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-extremes-of-inequalities-in-variables-x-and-y/sssssjf7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-extremes-of-inequalities-in-variables-x-and-y/sssssjf7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-extremes-of-inequalities-in-variables-x-and-y/sssssjf7"/>
      <lastmod>2026-11-01T19:15:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-demo-by-jorgewjim/sssssjfn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-demo-by-jorgewjim/sssssjfn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-demo-by-jorgewjim/sssssjfn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-demo-by-jorgewjim/sssssjfn"/>
      <lastmod>2026-11-01T21:34:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-demo-by-jorgewjim/sssssjfn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-demo-by-jorgewjim/sssssjfn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-demo-by-jorgewjim/sssssjfn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-demo-by-jorgewjim/sssssjfn"/>
      <lastmod>2026-11-01T21:34:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cutting-a-cone-with-an-interactive-plane/sssssjf2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cutting-a-cone-with-an-interactive-plane/sssssjf2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cutting-a-cone-with-an-interactive-plane/sssssjf2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cutting-a-cone-with-an-interactive-plane/sssssjf2"/>
      <lastmod>2026-11-01T19:02:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cutting-a-cone-with-an-interactive-plane/sssssjf2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cutting-a-cone-with-an-interactive-plane/sssssjf2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cutting-a-cone-with-an-interactive-plane/sssssjf2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cutting-a-cone-with-an-interactive-plane/sssssjf2"/>
      <lastmod>2026-11-01T19:02:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lines-in-a-triangle/sssssjfk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lines-in-a-triangle/sssssjfk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lines-in-a-triangle/sssssjfk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lines-in-a-triangle/sssssjfk"/>
      <lastmod>2026-11-02T16:55:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lines-in-a-triangle/sssssjfk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lines-in-a-triangle/sssssjfk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lines-in-a-triangle/sssssjfk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lines-in-a-triangle/sssssjfk"/>
      <lastmod>2026-11-02T16:55:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/northwest-airlines-flight-routes/sssssjfz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/northwest-airlines-flight-routes/sssssjfz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/northwest-airlines-flight-routes/sssssjfz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/northwest-airlines-flight-routes/sssssjfz"/>
      <lastmod>2026-11-01T19:36:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/northwest-airlines-flight-routes/sssssjfz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/northwest-airlines-flight-routes/sssssjfz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/northwest-airlines-flight-routes/sssssjfz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/northwest-airlines-flight-routes/sssssjfz"/>
      <lastmod>2026-11-01T19:36:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/repeated-reflections-in-an-ellipse/sssssjf0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/repeated-reflections-in-an-ellipse/sssssjf0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/repeated-reflections-in-an-ellipse/sssssjf0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/repeated-reflections-in-an-ellipse/sssssjf0"/>
      <lastmod>2026-11-02T16:50:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/repeated-reflections-in-an-ellipse/sssssjf0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/repeated-reflections-in-an-ellipse/sssssjf0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/repeated-reflections-in-an-ellipse/sssssjf0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/repeated-reflections-in-an-ellipse/sssssjf0"/>
      <lastmod>2026-11-02T16:50:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-a-kite-by-shanlee/sssssjfd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-kite-by-shanlee/sssssjfd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-kite-by-shanlee/sssssjfd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-kite-by-shanlee/sssssjfd"/>
      <lastmod>2026-11-01T23:37:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-a-kite-by-shanlee/sssssjfd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-kite-by-shanlee/sssssjfd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-kite-by-shanlee/sssssjfd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-kite-by-shanlee/sssssjfd"/>
      <lastmod>2026-11-01T23:37:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-7-5-7-practice-solving-problems-with-addition-and-subtraction/sssssjff</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-5-7-practice-solving-problems-with-addition-and-subtraction/sssssjff"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-5-7-practice-solving-problems-with-addition-and-subtraction/sssssjff"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-5-7-practice-solving-problems-with-addition-and-subtraction/sssssjff"/>
      <lastmod>2026-11-01T20:20:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-7-5-7-practice-solving-problems-with-addition-and-subtraction/sssssjff</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-5-7-practice-solving-problems-with-addition-and-subtraction/sssssjff"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-5-7-practice-solving-problems-with-addition-and-subtraction/sssssjff"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-5-7-practice-solving-problems-with-addition-and-subtraction/sssssjff"/>
      <lastmod>2026-11-01T20:20:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/statistics-dotplot-and-boxplot/sssssjf8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/statistics-dotplot-and-boxplot/sssssjf8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/statistics-dotplot-and-boxplot/sssssjf8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/statistics-dotplot-and-boxplot/sssssjf8"/>
      <lastmod>2026-11-02T17:38:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/statistics-dotplot-and-boxplot/sssssjf8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/statistics-dotplot-and-boxplot/sssssjf8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/statistics-dotplot-and-boxplot/sssssjf8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/statistics-dotplot-and-boxplot/sssssjf8"/>
      <lastmod>2026-11-02T17:38:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/addition-and-subtraction-of-complex-numbers/sssssjfu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-and-subtraction-of-complex-numbers/sssssjfu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-and-subtraction-of-complex-numbers/sssssjfu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-and-subtraction-of-complex-numbers/sssssjfu"/>
      <lastmod>2026-11-02T17:09:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/addition-and-subtraction-of-complex-numbers/sssssjfu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-and-subtraction-of-complex-numbers/sssssjfu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-and-subtraction-of-complex-numbers/sssssjfu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-and-subtraction-of-complex-numbers/sssssjfu"/>
      <lastmod>2026-11-02T17:09:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/oriented-parametric-circles-in-3d/sssssjf5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oriented-parametric-circles-in-3d/sssssjf5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oriented-parametric-circles-in-3d/sssssjf5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oriented-parametric-circles-in-3d/sssssjf5"/>
      <lastmod>2026-11-02T02:45:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/oriented-parametric-circles-in-3d/sssssjf5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oriented-parametric-circles-in-3d/sssssjf5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oriented-parametric-circles-in-3d/sssssjf5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oriented-parametric-circles-in-3d/sssssjf5"/>
      <lastmod>2026-11-02T02:45:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-to-a-parabola-by-gary-rubinstein/sssssjfb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-to-a-parabola-by-gary-rubinstein/sssssjfb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-to-a-parabola-by-gary-rubinstein/sssssjfb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-to-a-parabola-by-gary-rubinstein/sssssjfb"/>
      <lastmod>2026-11-02T17:00:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-to-a-parabola-by-gary-rubinstein/sssssjfb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-to-a-parabola-by-gary-rubinstein/sssssjfb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-to-a-parabola-by-gary-rubinstein/sssssjfb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-to-a-parabola-by-gary-rubinstein/sssssjfb"/>
      <lastmod>2026-11-02T17:00:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-demonstration-by-mathew-noggle/sssssjf3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-demonstration-by-mathew-noggle/sssssjf3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-demonstration-by-mathew-noggle/sssssjf3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-demonstration-by-mathew-noggle/sssssjf3"/>
      <lastmod>2026-11-02T16:48:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-demonstration-by-mathew-noggle/sssssjf3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-demonstration-by-mathew-noggle/sssssjf3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-demonstration-by-mathew-noggle/sssssjf3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-demonstration-by-mathew-noggle/sssssjf3"/>
      <lastmod>2026-11-02T16:48:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-circle-dissection/sssssjfq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-circle-dissection/sssssjfq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-circle-dissection/sssssjfq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-circle-dissection/sssssjfq"/>
      <lastmod>2026-11-02T17:50:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-circle-dissection/sssssjfq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-circle-dissection/sssssjfq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-circle-dissection/sssssjfq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-circle-dissection/sssssjfq"/>
      <lastmod>2026-11-02T17:50:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygon-perimeters-demo/sssssjf1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-perimeters-demo/sssssjf1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-perimeters-demo/sssssjf1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-perimeters-demo/sssssjf1"/>
      <lastmod>2026-11-02T08:37:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygon-perimeters-demo/sssssjf1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-perimeters-demo/sssssjf1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-perimeters-demo/sssssjf1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-perimeters-demo/sssssjf1"/>
      <lastmod>2026-11-02T08:37:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/line-segment-gradient-demo/sssssjfm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-segment-gradient-demo/sssssjfm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-segment-gradient-demo/sssssjfm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-segment-gradient-demo/sssssjfm"/>
      <lastmod>2026-11-01T23:57:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/line-segment-gradient-demo/sssssjfm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-segment-gradient-demo/sssssjfm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-segment-gradient-demo/sssssjfm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-segment-gradient-demo/sssssjfm"/>
      <lastmod>2026-11-01T23:57:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-tetrahedral-numbers-display/sssssjfj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-tetrahedral-numbers-display/sssssjfj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-tetrahedral-numbers-display/sssssjfj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-tetrahedral-numbers-display/sssssjfj"/>
      <lastmod>2026-11-01T23:22:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-tetrahedral-numbers-display/sssssjfj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-tetrahedral-numbers-display/sssssjfj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-tetrahedral-numbers-display/sssssjfj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-tetrahedral-numbers-display/sssssjfj"/>
      <lastmod>2026-11-01T23:22:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reference-angle-example-demonstrating-reference-angle-and-unit-circle/sssssjfp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reference-angle-example-demonstrating-reference-angle-and-unit-circle/sssssjfp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reference-angle-example-demonstrating-reference-angle-and-unit-circle/sssssjfp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reference-angle-example-demonstrating-reference-angle-and-unit-circle/sssssjfp"/>
      <lastmod>2026-11-02T02:33:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reference-angle-example-demonstrating-reference-angle-and-unit-circle/sssssjfp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reference-angle-example-demonstrating-reference-angle-and-unit-circle/sssssjfp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reference-angle-example-demonstrating-reference-angle-and-unit-circle/sssssjfp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reference-angle-example-demonstrating-reference-angle-and-unit-circle/sssssjfp"/>
      <lastmod>2026-11-02T02:33:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-of-revolution-y-axis/sssssjfw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-y-axis/sssssjfw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-y-axis/sssssjfw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-y-axis/sssssjfw"/>
      <lastmod>2026-11-01T19:34:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-of-revolution-y-axis/sssssjfw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-y-axis/sssssjfw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-y-axis/sssssjfw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-y-axis/sssssjfw"/>
      <lastmod>2026-11-01T19:34:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/percent-increase-and-decrease-with-equations-example/sssssjf6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/percent-increase-and-decrease-with-equations-example/sssssjf6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/percent-increase-and-decrease-with-equations-example/sssssjf6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/percent-increase-and-decrease-with-equations-example/sssssjf6"/>
      <lastmod>2026-11-01T22:57:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/percent-increase-and-decrease-with-equations-example/sssssjf6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/percent-increase-and-decrease-with-equations-example/sssssjf6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/percent-increase-and-decrease-with-equations-example/sssssjf6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/percent-increase-and-decrease-with-equations-example/sssssjf6"/>
      <lastmod>2026-11-01T22:57:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-integers/sssssjfg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-integers/sssssjfg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-integers/sssssjfg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-integers/sssssjfg"/>
      <lastmod>2026-11-01T23:50:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-integers/sssssjfg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-integers/sssssjfg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-integers/sssssjfg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-integers/sssssjfg"/>
      <lastmod>2026-11-01T23:50:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-addition-and-differential-quotient-illustration/sssssjf9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-addition-and-differential-quotient-illustration/sssssjf9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-addition-and-differential-quotient-illustration/sssssjf9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-addition-and-differential-quotient-illustration/sssssjf9"/>
      <lastmod>2026-11-01T19:22:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-addition-and-differential-quotient-illustration/sssssjf9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-addition-and-differential-quotient-illustration/sssssjf9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-addition-and-differential-quotient-illustration/sssssjf9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-addition-and-differential-quotient-illustration/sssssjf9"/>
      <lastmod>2026-11-01T19:22:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transversal-intersects-parallel-lines-investigation-by-dbroadstone/sssssjfe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transversal-intersects-parallel-lines-investigation-by-dbroadstone/sssssjfe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transversal-intersects-parallel-lines-investigation-by-dbroadstone/sssssjfe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transversal-intersects-parallel-lines-investigation-by-dbroadstone/sssssjfe"/>
      <lastmod>2026-11-02T16:55:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transversal-intersects-parallel-lines-investigation-by-dbroadstone/sssssjfe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transversal-intersects-parallel-lines-investigation-by-dbroadstone/sssssjfe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transversal-intersects-parallel-lines-investigation-by-dbroadstone/sssssjfe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transversal-intersects-parallel-lines-investigation-by-dbroadstone/sssssjfe"/>
      <lastmod>2026-11-02T16:55:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/functions-with-four-corners-cut-off/sssssjfv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/functions-with-four-corners-cut-off/sssssjfv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/functions-with-four-corners-cut-off/sssssjfv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/functions-with-four-corners-cut-off/sssssjfv"/>
      <lastmod>2026-11-01T23:59:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/functions-with-four-corners-cut-off/sssssjfv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/functions-with-four-corners-cut-off/sssssjfv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/functions-with-four-corners-cut-off/sssssjfv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/functions-with-four-corners-cut-off/sssssjfv"/>
      <lastmod>2026-11-01T23:59:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/4-numbers-fifth-grade-version/sssssjf4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/4-numbers-fifth-grade-version/sssssjf4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/4-numbers-fifth-grade-version/sssssjf4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/4-numbers-fifth-grade-version/sssssjf4"/>
      <lastmod>2026-11-02T18:53:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/4-numbers-fifth-grade-version/sssssjf4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/4-numbers-fifth-grade-version/sssssjf4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/4-numbers-fifth-grade-version/sssssjf4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/4-numbers-fifth-grade-version/sssssjf4"/>
      <lastmod>2026-11-02T18:53:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simple-hsl-scheme-demonstration/sssssjfl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-hsl-scheme-demonstration/sssssjfl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-hsl-scheme-demonstration/sssssjfl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-hsl-scheme-demonstration/sssssjfl"/>
      <lastmod>2026-11-01T21:05:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simple-hsl-scheme-demonstration/sssssjfl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-hsl-scheme-demonstration/sssssjfl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-hsl-scheme-demonstration/sssssjfl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-hsl-scheme-demonstration/sssssjfl"/>
      <lastmod>2026-11-01T21:05:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/medians-of-similar-triangles/sssssjfy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/medians-of-similar-triangles/sssssjfy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/medians-of-similar-triangles/sssssjfy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/medians-of-similar-triangles/sssssjfy"/>
      <lastmod>2026-11-01T23:36:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/medians-of-similar-triangles/sssssjfy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/medians-of-similar-triangles/sssssjfy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/medians-of-similar-triangles/sssssjfy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/medians-of-similar-triangles/sssssjfy"/>
      <lastmod>2026-11-01T23:36:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lsrl-residuals-and-residual-squares-for-3-points/sssssjfa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lsrl-residuals-and-residual-squares-for-3-points/sssssjfa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lsrl-residuals-and-residual-squares-for-3-points/sssssjfa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lsrl-residuals-and-residual-squares-for-3-points/sssssjfa"/>
      <lastmod>2026-11-02T17:00:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lsrl-residuals-and-residual-squares-for-3-points/sssssjfa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lsrl-residuals-and-residual-squares-for-3-points/sssssjfa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lsrl-residuals-and-residual-squares-for-3-points/sssssjfa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lsrl-residuals-and-residual-squares-for-3-points/sssssjfa"/>
      <lastmod>2026-11-02T17:00:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/2d-vectors-and-reflection-geometric-construction-by-claudio-mart-nez-gil/sssssjfc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-vectors-and-reflection-geometric-construction-by-claudio-mart-nez-gil/sssssjfc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-vectors-and-reflection-geometric-construction-by-claudio-mart-nez-gil/sssssjfc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-vectors-and-reflection-geometric-construction-by-claudio-mart-nez-gil/sssssjfc"/>
      <lastmod>2026-11-01T23:08:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/2d-vectors-and-reflection-geometric-construction-by-claudio-mart-nez-gil/sssssjfc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-vectors-and-reflection-geometric-construction-by-claudio-mart-nez-gil/sssssjfc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-vectors-and-reflection-geometric-construction-by-claudio-mart-nez-gil/sssssjfc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-vectors-and-reflection-geometric-construction-by-claudio-mart-nez-gil/sssssjfc"/>
      <lastmod>2026-11-01T23:08:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gauss-jordan-elimination-for-inverse-matrix/sssssjfr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gauss-jordan-elimination-for-inverse-matrix/sssssjfr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gauss-jordan-elimination-for-inverse-matrix/sssssjfr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gauss-jordan-elimination-for-inverse-matrix/sssssjfr"/>
      <lastmod>2026-11-02T18:48:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gauss-jordan-elimination-for-inverse-matrix/sssssjfr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gauss-jordan-elimination-for-inverse-matrix/sssssjfr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gauss-jordan-elimination-for-inverse-matrix/sssssjfr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gauss-jordan-elimination-for-inverse-matrix/sssssjfr"/>
      <lastmod>2026-11-02T18:48:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quotient-of-powers/sssssjfh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quotient-of-powers/sssssjfh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quotient-of-powers/sssssjfh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quotient-of-powers/sssssjfh"/>
      <lastmod>2026-11-02T00:36:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quotient-of-powers/sssssjfh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quotient-of-powers/sssssjfh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quotient-of-powers/sssssjfh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quotient-of-powers/sssssjfh"/>
      <lastmod>2026-11-02T00:36:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shortest-distance-from-a-point-to-a-line-segment-angle-bisector/sssssjft</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shortest-distance-from-a-point-to-a-line-segment-angle-bisector/sssssjft"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shortest-distance-from-a-point-to-a-line-segment-angle-bisector/sssssjft"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shortest-distance-from-a-point-to-a-line-segment-angle-bisector/sssssjft"/>
      <lastmod>2026-11-01T21:31:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shortest-distance-from-a-point-to-a-line-segment-angle-bisector/sssssjft</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shortest-distance-from-a-point-to-a-line-segment-angle-bisector/sssssjft"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shortest-distance-from-a-point-to-a-line-segment-angle-bisector/sssssjft"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shortest-distance-from-a-point-to-a-line-segment-angle-bisector/sssssjft"/>
      <lastmod>2026-11-01T21:31:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/locus-of-a-parabola/sssssjfx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-of-a-parabola/sssssjfx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-of-a-parabola/sssssjfx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-of-a-parabola/sssssjfx"/>
      <lastmod>2026-11-02T13:37:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/locus-of-a-parabola/sssssjfx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-of-a-parabola/sssssjfx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-of-a-parabola/sssssjfx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-of-a-parabola/sssssjfx"/>
      <lastmod>2026-11-02T13:37:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-number-and-conic-section-geogebra-demonstration/sssssjfi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-and-conic-section-geogebra-demonstration/sssssjfi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-and-conic-section-geogebra-demonstration/sssssjfi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-and-conic-section-geogebra-demonstration/sssssjfi"/>
      <lastmod>2026-11-01T23:12:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-number-and-conic-section-geogebra-demonstration/sssssjfi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-and-conic-section-geogebra-demonstration/sssssjfi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-and-conic-section-geogebra-demonstration/sssssjfi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-and-conic-section-geogebra-demonstration/sssssjfi"/>
      <lastmod>2026-11-01T23:12:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-between-two-planes-by-wuguoning/sssssjfo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-by-wuguoning/sssssjfo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-two-planes-by-wuguoning/sssssjfo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-by-wuguoning/sssssjfo"/>
      <lastmod>2026-11-01T19:26:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-between-two-planes-by-wuguoning/sssssjfo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-by-wuguoning/sssssjfo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-two-planes-by-wuguoning/sssssjfo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-by-wuguoning/sssssjfo"/>
      <lastmod>2026-11-01T19:26:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-stretching/sssssj8s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-stretching/sssssj8s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-stretching/sssssj8s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-stretching/sssssj8s"/>
      <lastmod>2026-11-02T12:48:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-stretching/sssssj8s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-stretching/sssssj8s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-stretching/sssssj8s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-stretching/sssssj8s"/>
      <lastmod>2026-11-02T12:48:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/evaluate-fraction-exponents/sssssj87</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/evaluate-fraction-exponents/sssssj87"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/evaluate-fraction-exponents/sssssj87"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/evaluate-fraction-exponents/sssssj87"/>
      <lastmod>2026-11-02T03:15:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/evaluate-fraction-exponents/sssssj87</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/evaluate-fraction-exponents/sssssj87"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/evaluate-fraction-exponents/sssssj87"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/evaluate-fraction-exponents/sssssj87"/>
      <lastmod>2026-11-02T03:15:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/decimal-numbers-demo/sssssj8n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-numbers-demo/sssssj8n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-numbers-demo/sssssj8n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-numbers-demo/sssssj8n"/>
      <lastmod>2026-11-01T23:14:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/decimal-numbers-demo/sssssj8n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-numbers-demo/sssssj8n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-numbers-demo/sssssj8n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-numbers-demo/sssssj8n"/>
      <lastmod>2026-11-01T23:14:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angles-of-elevation-and-depression-by-patrick-chung/sssssj82</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-of-elevation-and-depression-by-patrick-chung/sssssj82"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-of-elevation-and-depression-by-patrick-chung/sssssj82"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-of-elevation-and-depression-by-patrick-chung/sssssj82"/>
      <lastmod>2026-11-01T19:14:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angles-of-elevation-and-depression-by-patrick-chung/sssssj82</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-of-elevation-and-depression-by-patrick-chung/sssssj82"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-of-elevation-and-depression-by-patrick-chung/sssssj82"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-of-elevation-and-depression-by-patrick-chung/sssssj82"/>
      <lastmod>2026-11-01T19:14:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-geometry-demo-on-symmetry-and-hypothesis-testing/sssssj8k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-geometry-demo-on-symmetry-and-hypothesis-testing/sssssj8k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-geometry-demo-on-symmetry-and-hypothesis-testing/sssssj8k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-geometry-demo-on-symmetry-and-hypothesis-testing/sssssj8k"/>
      <lastmod>2026-11-02T10:53:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-geometry-demo-on-symmetry-and-hypothesis-testing/sssssj8k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-geometry-demo-on-symmetry-and-hypothesis-testing/sssssj8k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-geometry-demo-on-symmetry-and-hypothesis-testing/sssssj8k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-geometry-demo-on-symmetry-and-hypothesis-testing/sssssj8k"/>
      <lastmod>2026-11-02T10:53:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-and-subtracting-decimals-interactive-practice/sssssj8z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-and-subtracting-decimals-interactive-practice/sssssj8z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-and-subtracting-decimals-interactive-practice/sssssj8z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-and-subtracting-decimals-interactive-practice/sssssj8z"/>
      <lastmod>2026-11-01T21:25:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-and-subtracting-decimals-interactive-practice/sssssj8z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-and-subtracting-decimals-interactive-practice/sssssj8z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-and-subtracting-decimals-interactive-practice/sssssj8z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-and-subtracting-decimals-interactive-practice/sssssj8z"/>
      <lastmod>2026-11-01T21:25:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cartesian-and-parametric-equations-of-a-circle/sssssj80</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cartesian-and-parametric-equations-of-a-circle/sssssj80"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cartesian-and-parametric-equations-of-a-circle/sssssj80"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cartesian-and-parametric-equations-of-a-circle/sssssj80"/>
      <lastmod>2026-11-02T13:34:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cartesian-and-parametric-equations-of-a-circle/sssssj80</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cartesian-and-parametric-equations-of-a-circle/sssssj80"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cartesian-and-parametric-equations-of-a-circle/sssssj80"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cartesian-and-parametric-equations-of-a-circle/sssssj80"/>
      <lastmod>2026-11-02T13:34:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/eratosthenes-measurement-of-earth-s-circumference/sssssj8d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eratosthenes-measurement-of-earth-s-circumference/sssssj8d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eratosthenes-measurement-of-earth-s-circumference/sssssj8d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eratosthenes-measurement-of-earth-s-circumference/sssssj8d"/>
      <lastmod>2026-11-02T18:27:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/eratosthenes-measurement-of-earth-s-circumference/sssssj8d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eratosthenes-measurement-of-earth-s-circumference/sssssj8d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eratosthenes-measurement-of-earth-s-circumference/sssssj8d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eratosthenes-measurement-of-earth-s-circumference/sssssj8d"/>
      <lastmod>2026-11-02T18:27:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilations-practice-by-sloant/sssssj8f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-practice-by-sloant/sssssj8f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-practice-by-sloant/sssssj8f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-practice-by-sloant/sssssj8f"/>
      <lastmod>2026-11-01T21:09:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilations-practice-by-sloant/sssssj8f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-practice-by-sloant/sssssj8f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-practice-by-sloant/sssssj8f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-practice-by-sloant/sssssj8f"/>
      <lastmod>2026-11-01T21:09:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-prism/sssssj88</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-prism/sssssj88"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-prism/sssssj88"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-prism/sssssj88"/>
      <lastmod>2026-11-02T13:15:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-prism/sssssj88</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-prism/sssssj88"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-prism/sssssj88"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-prism/sssssj88"/>
      <lastmod>2026-11-02T13:15:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mass-volume-and-density-calculator/sssssj8u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mass-volume-and-density-calculator/sssssj8u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mass-volume-and-density-calculator/sssssj8u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mass-volume-and-density-calculator/sssssj8u"/>
      <lastmod>2026-11-02T17:10:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mass-volume-and-density-calculator/sssssj8u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mass-volume-and-density-calculator/sssssj8u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mass-volume-and-density-calculator/sssssj8u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mass-volume-and-density-calculator/sssssj8u"/>
      <lastmod>2026-11-02T17:10:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-construction-of-parallel-line/sssssj85</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-construction-of-parallel-line/sssssj85"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-construction-of-parallel-line/sssssj85"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-construction-of-parallel-line/sssssj85"/>
      <lastmod>2026-11-02T17:02:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-construction-of-parallel-line/sssssj85</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-construction-of-parallel-line/sssssj85"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-construction-of-parallel-line/sssssj85"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-construction-of-parallel-line/sssssj85"/>
      <lastmod>2026-11-02T17:02:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/check-is-it-a-perpendicular-bisector/sssssj8b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/check-is-it-a-perpendicular-bisector/sssssj8b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/check-is-it-a-perpendicular-bisector/sssssj8b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/check-is-it-a-perpendicular-bisector/sssssj8b"/>
      <lastmod>2026-11-01T21:11:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/check-is-it-a-perpendicular-bisector/sssssj8b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/check-is-it-a-perpendicular-bisector/sssssj8b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/check-is-it-a-perpendicular-bisector/sssssj8b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/check-is-it-a-perpendicular-bisector/sssssj8b"/>
      <lastmod>2026-11-01T21:11:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-inscribed-angles-intercept-the-same-arc/sssssj83</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-inscribed-angles-intercept-the-same-arc/sssssj83"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-inscribed-angles-intercept-the-same-arc/sssssj83"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-inscribed-angles-intercept-the-same-arc/sssssj83"/>
      <lastmod>2026-11-02T12:00:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-inscribed-angles-intercept-the-same-arc/sssssj83</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-inscribed-angles-intercept-the-same-arc/sssssj83"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-inscribed-angles-intercept-the-same-arc/sssssj83"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-inscribed-angles-intercept-the-same-arc/sssssj83"/>
      <lastmod>2026-11-02T12:00:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inverse-linear-functions-by-lamar-kauffman/sssssj8q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inverse-linear-functions-by-lamar-kauffman/sssssj8q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inverse-linear-functions-by-lamar-kauffman/sssssj8q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inverse-linear-functions-by-lamar-kauffman/sssssj8q"/>
      <lastmod>2026-11-02T18:05:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inverse-linear-functions-by-lamar-kauffman/sssssj8q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inverse-linear-functions-by-lamar-kauffman/sssssj8q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inverse-linear-functions-by-lamar-kauffman/sssssj8q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inverse-linear-functions-by-lamar-kauffman/sssssj8q"/>
      <lastmod>2026-11-02T18:05:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-construction-demo-by-jessica-swee/sssssj81</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-demo-by-jessica-swee/sssssj81"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-demo-by-jessica-swee/sssssj81"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-demo-by-jessica-swee/sssssj81"/>
      <lastmod>2026-11-01T23:38:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-construction-demo-by-jessica-swee/sssssj81</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-demo-by-jessica-swee/sssssj81"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-demo-by-jessica-swee/sssssj81"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-demo-by-jessica-swee/sssssj81"/>
      <lastmod>2026-11-01T23:38:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-transformation-demo/sssssj8m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-transformation-demo/sssssj8m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-transformation-demo/sssssj8m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-transformation-demo/sssssj8m"/>
      <lastmod>2026-11-02T12:08:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-transformation-demo/sssssj8m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-transformation-demo/sssssj8m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-transformation-demo/sssssj8m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-transformation-demo/sssssj8m"/>
      <lastmod>2026-11-02T12:08:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gauss-jordan-elimination-toolkit/sssssj8j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gauss-jordan-elimination-toolkit/sssssj8j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gauss-jordan-elimination-toolkit/sssssj8j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gauss-jordan-elimination-toolkit/sssssj8j"/>
      <lastmod>2026-11-01T23:30:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gauss-jordan-elimination-toolkit/sssssj8j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gauss-jordan-elimination-toolkit/sssssj8j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gauss-jordan-elimination-toolkit/sssssj8j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gauss-jordan-elimination-toolkit/sssssj8j"/>
      <lastmod>2026-11-01T23:30:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-combination-of-vectors/sssssj8p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-combination-of-vectors/sssssj8p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-combination-of-vectors/sssssj8p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-combination-of-vectors/sssssj8p"/>
      <lastmod>2026-11-01T23:59:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-combination-of-vectors/sssssj8p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-combination-of-vectors/sssssj8p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-combination-of-vectors/sssssj8p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-combination-of-vectors/sssssj8p"/>
      <lastmod>2026-11-01T23:59:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parametric-intersection-surfaces-demo/sssssj8w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-intersection-surfaces-demo/sssssj8w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-intersection-surfaces-demo/sssssj8w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-intersection-surfaces-demo/sssssj8w"/>
      <lastmod>2026-11-02T17:01:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parametric-intersection-surfaces-demo/sssssj8w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-intersection-surfaces-demo/sssssj8w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-intersection-surfaces-demo/sssssj8w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-intersection-surfaces-demo/sssssj8w"/>
      <lastmod>2026-11-02T17:01:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-exploration-3/sssssj86</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-exploration-3/sssssj86"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-exploration-3/sssssj86"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-exploration-3/sssssj86"/>
      <lastmod>2026-11-02T13:58:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-exploration-3/sssssj86</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-exploration-3/sssssj86"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-exploration-3/sssssj86"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-exploration-3/sssssj86"/>
      <lastmod>2026-11-02T13:58:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-a-parallelogram-by-mrs-cole/sssssj8g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-parallelogram-by-mrs-cole/sssssj8g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-parallelogram-by-mrs-cole/sssssj8g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-parallelogram-by-mrs-cole/sssssj8g"/>
      <lastmod>2026-11-01T23:33:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-a-parallelogram-by-mrs-cole/sssssj8g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-parallelogram-by-mrs-cole/sssssj8g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-parallelogram-by-mrs-cole/sssssj8g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-parallelogram-by-mrs-cole/sssssj8g"/>
      <lastmod>2026-11-01T23:33:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-and-logarithmic-functions-by-whan-ki-lee/sssssj89</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-and-logarithmic-functions-by-whan-ki-lee/sssssj89"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-and-logarithmic-functions-by-whan-ki-lee/sssssj89"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-and-logarithmic-functions-by-whan-ki-lee/sssssj89"/>
      <lastmod>2026-11-01T23:34:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-and-logarithmic-functions-by-whan-ki-lee/sssssj89</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-and-logarithmic-functions-by-whan-ki-lee/sssssj89"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-and-logarithmic-functions-by-whan-ki-lee/sssssj89"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-and-logarithmic-functions-by-whan-ki-lee/sssssj89"/>
      <lastmod>2026-11-01T23:34:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-volume-formula-exploration-with-dynamic-calculation/sssssj8e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-volume-formula-exploration-with-dynamic-calculation/sssssj8e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-volume-formula-exploration-with-dynamic-calculation/sssssj8e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-volume-formula-exploration-with-dynamic-calculation/sssssj8e"/>
      <lastmod>2026-11-02T00:37:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-volume-formula-exploration-with-dynamic-calculation/sssssj8e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-volume-formula-exploration-with-dynamic-calculation/sssssj8e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-volume-formula-exploration-with-dynamic-calculation/sssssj8e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-volume-formula-exploration-with-dynamic-calculation/sssssj8e"/>
      <lastmod>2026-11-02T00:37:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-inequalities-interactive-demonstration/sssssj8v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-inequalities-interactive-demonstration/sssssj8v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-inequalities-interactive-demonstration/sssssj8v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-inequalities-interactive-demonstration/sssssj8v"/>
      <lastmod>2026-11-02T17:53:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-inequalities-interactive-demonstration/sssssj8v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-inequalities-interactive-demonstration/sssssj8v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-inequalities-interactive-demonstration/sssssj8v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-inequalities-interactive-demonstration/sssssj8v"/>
      <lastmod>2026-11-02T17:53:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/distance-of-a-line-segment/sssssj84</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-of-a-line-segment/sssssj84"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-of-a-line-segment/sssssj84"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-of-a-line-segment/sssssj84"/>
      <lastmod>2026-11-02T15:19:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/distance-of-a-line-segment/sssssj84</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-of-a-line-segment/sssssj84"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-of-a-line-segment/sssssj84"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-of-a-line-segment/sssssj84"/>
      <lastmod>2026-11-02T15:19:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-perimeter/sssssj8l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-perimeter/sssssj8l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-perimeter/sssssj8l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-perimeter/sssssj8l"/>
      <lastmod>2026-11-02T18:18:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-perimeter/sssssj8l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-perimeter/sssssj8l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-perimeter/sssssj8l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-perimeter/sssssj8l"/>
      <lastmod>2026-11-02T18:18:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-conic-sections-by-tim-brzezinski/sssssj8y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-conic-sections-by-tim-brzezinski/sssssj8y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-conic-sections-by-tim-brzezinski/sssssj8y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-conic-sections-by-tim-brzezinski/sssssj8y"/>
      <lastmod>2026-11-02T02:55:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-conic-sections-by-tim-brzezinski/sssssj8y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-conic-sections-by-tim-brzezinski/sssssj8y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-conic-sections-by-tim-brzezinski/sssssj8y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-conic-sections-by-tim-brzezinski/sssssj8y"/>
      <lastmod>2026-11-02T02:55:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equations-and-probability-distributions-construction/sssssj8a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equations-and-probability-distributions-construction/sssssj8a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equations-and-probability-distributions-construction/sssssj8a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equations-and-probability-distributions-construction/sssssj8a"/>
      <lastmod>2026-11-01T23:55:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equations-and-probability-distributions-construction/sssssj8a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equations-and-probability-distributions-construction/sssssj8a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equations-and-probability-distributions-construction/sssssj8a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equations-and-probability-distributions-construction/sssssj8a"/>
      <lastmod>2026-11-01T23:55:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractions-to-decimals/sssssj8c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-to-decimals/sssssj8c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-to-decimals/sssssj8c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-to-decimals/sssssj8c"/>
      <lastmod>2026-11-02T18:15:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractions-to-decimals/sssssj8c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-to-decimals/sssssj8c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-to-decimals/sssssj8c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-to-decimals/sssssj8c"/>
      <lastmod>2026-11-02T18:15:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-bisector-construction-demo/sssssj8r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-bisector-construction-demo/sssssj8r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-bisector-construction-demo/sssssj8r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-bisector-construction-demo/sssssj8r"/>
      <lastmod>2026-11-01T21:39:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-bisector-construction-demo/sssssj8r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-bisector-construction-demo/sssssj8r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-bisector-construction-demo/sssssj8r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-bisector-construction-demo/sssssj8r"/>
      <lastmod>2026-11-01T21:39:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/figure-8-immersion-of-the-klein-bottle/sssssj8h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/figure-8-immersion-of-the-klein-bottle/sssssj8h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/figure-8-immersion-of-the-klein-bottle/sssssj8h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/figure-8-immersion-of-the-klein-bottle/sssssj8h"/>
      <lastmod>2026-11-02T16:46:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/figure-8-immersion-of-the-klein-bottle/sssssj8h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/figure-8-immersion-of-the-klein-bottle/sssssj8h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/figure-8-immersion-of-the-klein-bottle/sssssj8h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/figure-8-immersion-of-the-klein-bottle/sssssj8h"/>
      <lastmod>2026-11-02T16:46:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-line-of-triangle-and-circle/sssssj8t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-line-of-triangle-and-circle/sssssj8t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-line-of-triangle-and-circle/sssssj8t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-line-of-triangle-and-circle/sssssj8t"/>
      <lastmod>2026-11-02T13:16:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-line-of-triangle-and-circle/sssssj8t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-line-of-triangle-and-circle/sssssj8t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-line-of-triangle-and-circle/sssssj8t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-line-of-triangle-and-circle/sssssj8t"/>
      <lastmod>2026-11-02T13:16:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/independent-events-probability-demo/sssssj8x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/independent-events-probability-demo/sssssj8x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/independent-events-probability-demo/sssssj8x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/independent-events-probability-demo/sssssj8x"/>
      <lastmod>2026-11-02T18:30:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/independent-events-probability-demo/sssssj8x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/independent-events-probability-demo/sssssj8x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/independent-events-probability-demo/sssssj8x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/independent-events-probability-demo/sssssj8x"/>
      <lastmod>2026-11-02T18:30:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-folding-and-rotation-exploration/sssssj8i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-folding-and-rotation-exploration/sssssj8i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-folding-and-rotation-exploration/sssssj8i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-folding-and-rotation-exploration/sssssj8i"/>
      <lastmod>2026-11-02T16:44:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-folding-and-rotation-exploration/sssssj8i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-folding-and-rotation-exploration/sssssj8i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-folding-and-rotation-exploration/sssssj8i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-folding-and-rotation-exploration/sssssj8i"/>
      <lastmod>2026-11-02T16:44:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-systems-of-equations/sssssj8o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-systems-of-equations/sssssj8o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-systems-of-equations/sssssj8o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-systems-of-equations/sssssj8o"/>
      <lastmod>2026-11-01T20:20:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-systems-of-equations/sssssj8o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-systems-of-equations/sssssj8o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-systems-of-equations/sssssj8o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-systems-of-equations/sssssj8o"/>
      <lastmod>2026-11-01T20:20:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-and-function-graphs/sssssjus</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-and-function-graphs/sssssjus"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-and-function-graphs/sssssjus"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-and-function-graphs/sssssjus"/>
      <lastmod>2026-11-01T23:13:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-and-function-graphs/sssssjus</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-and-function-graphs/sssssjus"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-and-function-graphs/sssssjus"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-and-function-graphs/sssssjus"/>
      <lastmod>2026-11-01T23:13:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-a-quadratic-function/sssssju7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-a-quadratic-function/sssssju7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-a-quadratic-function/sssssju7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-a-quadratic-function/sssssju7"/>
      <lastmod>2026-11-02T13:48:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-of-a-quadratic-function/sssssju7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-a-quadratic-function/sssssju7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-a-quadratic-function/sssssju7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-a-quadratic-function/sssssju7"/>
      <lastmod>2026-11-02T13:48:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pac-man-is-hungry/sssssjun</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pac-man-is-hungry/sssssjun"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pac-man-is-hungry/sssssjun"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pac-man-is-hungry/sssssjun"/>
      <lastmod>2026-11-01T20:46:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pac-man-is-hungry/sssssjun</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pac-man-is-hungry/sssssjun"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pac-man-is-hungry/sssssjun"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pac-man-is-hungry/sssssjun"/>
      <lastmod>2026-11-01T20:46:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pascal-triangle-row-sum-pattern/sssssju2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pascal-triangle-row-sum-pattern/sssssju2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pascal-triangle-row-sum-pattern/sssssju2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pascal-triangle-row-sum-pattern/sssssju2"/>
      <lastmod>2026-11-01T23:37:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pascal-triangle-row-sum-pattern/sssssju2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pascal-triangle-row-sum-pattern/sssssju2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pascal-triangle-row-sum-pattern/sssssju2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pascal-triangle-row-sum-pattern/sssssju2"/>
      <lastmod>2026-11-01T23:37:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explanation-of-invariance-of-the-sum-of-squares-of-distances-using-steiner-theor/sssssjuk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explanation-of-invariance-of-the-sum-of-squares-of-distances-using-steiner-theor/sssssjuk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explanation-of-invariance-of-the-sum-of-squares-of-distances-using-steiner-theor/sssssjuk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explanation-of-invariance-of-the-sum-of-squares-of-distances-using-steiner-theor/sssssjuk"/>
      <lastmod>2026-11-02T02:23:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explanation-of-invariance-of-the-sum-of-squares-of-distances-using-steiner-theor/sssssjuk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explanation-of-invariance-of-the-sum-of-squares-of-distances-using-steiner-theor/sssssjuk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explanation-of-invariance-of-the-sum-of-squares-of-distances-using-steiner-theor/sssssjuk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explanation-of-invariance-of-the-sum-of-squares-of-distances-using-steiner-theor/sssssjuk"/>
      <lastmod>2026-11-02T02:23:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/piecewise-functions/sssssjuz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/piecewise-functions/sssssjuz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/piecewise-functions/sssssjuz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/piecewise-functions/sssssjuz"/>
      <lastmod>2026-11-01T19:09:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/piecewise-functions/sssssjuz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/piecewise-functions/sssssjuz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/piecewise-functions/sssssjuz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/piecewise-functions/sssssjuz"/>
      <lastmod>2026-11-01T19:09:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-two-foci-definition/sssssju0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-two-foci-definition/sssssju0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-two-foci-definition/sssssju0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-two-foci-definition/sssssju0"/>
      <lastmod>2026-11-02T06:16:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-two-foci-definition/sssssju0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-two-foci-definition/sssssju0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-two-foci-definition/sssssju0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-two-foci-definition/sssssju0"/>
      <lastmod>2026-11-02T06:16:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/other-spirals/sssssjud</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/other-spirals/sssssjud"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/other-spirals/sssssjud"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/other-spirals/sssssjud"/>
      <lastmod>2026-11-01T23:58:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/other-spirals/sssssjud</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/other-spirals/sssssjud"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/other-spirals/sssssjud"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/other-spirals/sssssjud"/>
      <lastmod>2026-11-01T23:58:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-right-triangles-by-zach-schaver/sssssjuf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-right-triangles-by-zach-schaver/sssssjuf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-right-triangles-by-zach-schaver/sssssjuf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-right-triangles-by-zach-schaver/sssssjuf"/>
      <lastmod>2026-11-01T23:52:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-right-triangles-by-zach-schaver/sssssjuf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-right-triangles-by-zach-schaver/sssssjuf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-right-triangles-by-zach-schaver/sssssjuf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-right-triangles-by-zach-schaver/sssssjuf"/>
      <lastmod>2026-11-01T23:52:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/curvature-of-an-ellipse/sssssju8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curvature-of-an-ellipse/sssssju8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curvature-of-an-ellipse/sssssju8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curvature-of-an-ellipse/sssssju8"/>
      <lastmod>2026-11-02T09:46:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/curvature-of-an-ellipse/sssssju8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curvature-of-an-ellipse/sssssju8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curvature-of-an-ellipse/sssssju8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curvature-of-an-ellipse/sssssju8"/>
      <lastmod>2026-11-02T09:46:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-a-triangle-comparing-with-an-equal-base-height-rectangle/sssssjuu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-triangle-comparing-with-an-equal-base-height-rectangle/sssssjuu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-triangle-comparing-with-an-equal-base-height-rectangle/sssssjuu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-triangle-comparing-with-an-equal-base-height-rectangle/sssssjuu"/>
      <lastmod>2026-11-01T19:13:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-a-triangle-comparing-with-an-equal-base-height-rectangle/sssssjuu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-triangle-comparing-with-an-equal-base-height-rectangle/sssssjuu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-triangle-comparing-with-an-equal-base-height-rectangle/sssssjuu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-triangle-comparing-with-an-equal-base-height-rectangle/sssssjuu"/>
      <lastmod>2026-11-01T19:13:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangle-exploration-1/sssssju5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangle-exploration-1/sssssju5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangle-exploration-1/sssssju5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangle-exploration-1/sssssju5"/>
      <lastmod>2026-11-01T21:05:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangle-exploration-1/sssssju5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangle-exploration-1/sssssju5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangle-exploration-1/sssssju5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangle-exploration-1/sssssju5"/>
      <lastmod>2026-11-01T21:05:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/decimal-multiplication-by-any-whole/sssssjub</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-multiplication-by-any-whole/sssssjub"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-multiplication-by-any-whole/sssssjub"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-multiplication-by-any-whole/sssssjub"/>
      <lastmod>2026-11-02T17:38:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/decimal-multiplication-by-any-whole/sssssjub</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-multiplication-by-any-whole/sssssjub"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-multiplication-by-any-whole/sssssjub"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-multiplication-by-any-whole/sssssjub"/>
      <lastmod>2026-11-02T17:38:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conic-eccentricity-slider/sssssju3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-eccentricity-slider/sssssju3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-eccentricity-slider/sssssju3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-eccentricity-slider/sssssju3"/>
      <lastmod>2026-11-02T02:41:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conic-eccentricity-slider/sssssju3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-eccentricity-slider/sssssju3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-eccentricity-slider/sssssju3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-eccentricity-slider/sssssju3"/>
      <lastmod>2026-11-02T02:41:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-net-construction/sssssjuq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-net-construction/sssssjuq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-net-construction/sssssjuq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-net-construction/sssssjuq"/>
      <lastmod>2026-11-02T15:50:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-net-construction/sssssjuq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-net-construction/sssssjuq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-net-construction/sssssjuq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-net-construction/sssssjuq"/>
      <lastmod>2026-11-02T15:50:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotated-sine-functions/sssssju1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotated-sine-functions/sssssju1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotated-sine-functions/sssssju1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotated-sine-functions/sssssju1"/>
      <lastmod>2026-11-02T18:32:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotated-sine-functions/sssssju1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotated-sine-functions/sssssju1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotated-sine-functions/sssssju1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotated-sine-functions/sssssju1"/>
      <lastmod>2026-11-02T18:32:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-triangles-quiz-3-attempts/sssssjum</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangles-quiz-3-attempts/sssssjum"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangles-quiz-3-attempts/sssssjum"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangles-quiz-3-attempts/sssssjum"/>
      <lastmod>2026-11-01T19:04:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-triangles-quiz-3-attempts/sssssjum</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangles-quiz-3-attempts/sssssjum"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangles-quiz-3-attempts/sssssjum"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangles-quiz-3-attempts/sssssjum"/>
      <lastmod>2026-11-01T19:04:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/acute-and-obtuse-angle-relationships-on-the-unit-circle/sssssjuj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/acute-and-obtuse-angle-relationships-on-the-unit-circle/sssssjuj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/acute-and-obtuse-angle-relationships-on-the-unit-circle/sssssjuj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/acute-and-obtuse-angle-relationships-on-the-unit-circle/sssssjuj"/>
      <lastmod>2026-11-02T16:42:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/acute-and-obtuse-angle-relationships-on-the-unit-circle/sssssjuj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/acute-and-obtuse-angle-relationships-on-the-unit-circle/sssssjuj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/acute-and-obtuse-angle-relationships-on-the-unit-circle/sssssjuj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/acute-and-obtuse-angle-relationships-on-the-unit-circle/sssssjuj"/>
      <lastmod>2026-11-02T16:42:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotate-cube-geometric-transformation-and-coordinate-system/sssssjup</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotate-cube-geometric-transformation-and-coordinate-system/sssssjup"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotate-cube-geometric-transformation-and-coordinate-system/sssssjup"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotate-cube-geometric-transformation-and-coordinate-system/sssssjup"/>
      <lastmod>2026-11-02T02:38:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotate-cube-geometric-transformation-and-coordinate-system/sssssjup</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotate-cube-geometric-transformation-and-coordinate-system/sssssjup"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotate-cube-geometric-transformation-and-coordinate-system/sssssjup"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotate-cube-geometric-transformation-and-coordinate-system/sssssjup"/>
      <lastmod>2026-11-02T02:38:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-demo-by-ewilso19/sssssjuw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-demo-by-ewilso19/sssssjuw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-demo-by-ewilso19/sssssjuw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-demo-by-ewilso19/sssssjuw"/>
      <lastmod>2026-11-01T22:09:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-demo-by-ewilso19/sssssjuw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-demo-by-ewilso19/sssssjuw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-demo-by-ewilso19/sssssjuw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-demo-by-ewilso19/sssssjuw"/>
      <lastmod>2026-11-01T22:09:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modifiable-solid-rectangular-cross-sections-parallel-to-yaxis/sssssju6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modifiable-solid-rectangular-cross-sections-parallel-to-yaxis/sssssju6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modifiable-solid-rectangular-cross-sections-parallel-to-yaxis/sssssju6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modifiable-solid-rectangular-cross-sections-parallel-to-yaxis/sssssju6"/>
      <lastmod>2026-11-01T21:36:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modifiable-solid-rectangular-cross-sections-parallel-to-yaxis/sssssju6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modifiable-solid-rectangular-cross-sections-parallel-to-yaxis/sssssju6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modifiable-solid-rectangular-cross-sections-parallel-to-yaxis/sssssju6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modifiable-solid-rectangular-cross-sections-parallel-to-yaxis/sssssju6"/>
      <lastmod>2026-11-01T21:36:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vectors-in-one-dimension/sssssjug</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-in-one-dimension/sssssjug"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-in-one-dimension/sssssjug"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-in-one-dimension/sssssjug"/>
      <lastmod>2026-11-02T12:05:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vectors-in-one-dimension/sssssjug</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-in-one-dimension/sssssjug"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-in-one-dimension/sssssjug"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-in-one-dimension/sssssjug"/>
      <lastmod>2026-11-02T12:05:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/day-5-rectangle/sssssju9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/day-5-rectangle/sssssju9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/day-5-rectangle/sssssju9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/day-5-rectangle/sssssju9"/>
      <lastmod>2026-11-02T18:13:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/day-5-rectangle/sssssju9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/day-5-rectangle/sssssju9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/day-5-rectangle/sssssju9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/day-5-rectangle/sssssju9"/>
      <lastmod>2026-11-02T18:13:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-division-3-4-by-2/sssssjue</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-division-3-4-by-2/sssssjue"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-division-3-4-by-2/sssssjue"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-division-3-4-by-2/sssssjue"/>
      <lastmod>2026-11-02T02:35:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-division-3-4-by-2/sssssjue</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-division-3-4-by-2/sssssjue"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-division-3-4-by-2/sssssjue"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-division-3-4-by-2/sssssjue"/>
      <lastmod>2026-11-02T02:35:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/midpoints-on-square-sequence/sssssjuv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/midpoints-on-square-sequence/sssssjuv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/midpoints-on-square-sequence/sssssjuv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/midpoints-on-square-sequence/sssssjuv"/>
      <lastmod>2026-11-02T18:17:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/midpoints-on-square-sequence/sssssjuv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/midpoints-on-square-sequence/sssssjuv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/midpoints-on-square-sequence/sssssjuv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/midpoints-on-square-sequence/sssssjuv"/>
      <lastmod>2026-11-02T18:17:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proving-triangles-congruent-exercise-2/sssssju4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proving-triangles-congruent-exercise-2/sssssju4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proving-triangles-congruent-exercise-2/sssssju4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proving-triangles-congruent-exercise-2/sssssju4"/>
      <lastmod>2026-11-02T18:58:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proving-triangles-congruent-exercise-2/sssssju4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proving-triangles-congruent-exercise-2/sssssju4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proving-triangles-congruent-exercise-2/sssssju4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proving-triangles-congruent-exercise-2/sssssju4"/>
      <lastmod>2026-11-02T18:58:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/voronoi-diagrams/sssssjul</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/voronoi-diagrams/sssssjul"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/voronoi-diagrams/sssssjul"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/voronoi-diagrams/sssssjul"/>
      <lastmod>2026-11-01T21:15:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/voronoi-diagrams/sssssjul</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/voronoi-diagrams/sssssjul"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/voronoi-diagrams/sssssjul"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/voronoi-diagrams/sssssjul"/>
      <lastmod>2026-11-01T21:15:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cuboid-net/sssssjuy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cuboid-net/sssssjuy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cuboid-net/sssssjuy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cuboid-net/sssssjuy"/>
      <lastmod>2026-11-01T23:50:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cuboid-net/sssssjuy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cuboid-net/sssssjuy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cuboid-net/sssssjuy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cuboid-net/sssssjuy"/>
      <lastmod>2026-11-01T23:50:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/root-rectangles/sssssjua</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/root-rectangles/sssssjua"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/root-rectangles/sssssjua"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/root-rectangles/sssssjua"/>
      <lastmod>2026-11-01T23:28:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/root-rectangles/sssssjua</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/root-rectangles/sssssjua"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/root-rectangles/sssssjua"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/root-rectangles/sssssjua"/>
      <lastmod>2026-11-01T23:28:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotational-symmetry-of-parallelograms/sssssjuc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-parallelograms/sssssjuc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-of-parallelograms/sssssjuc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-parallelograms/sssssjuc"/>
      <lastmod>2026-11-02T18:41:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotational-symmetry-of-parallelograms/sssssjuc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-parallelograms/sssssjuc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-of-parallelograms/sssssjuc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-parallelograms/sssssjuc"/>
      <lastmod>2026-11-02T18:41:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-construction-example/sssssjur</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-construction-example/sssssjur"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-construction-example/sssssjur"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-construction-example/sssssjur"/>
      <lastmod>2026-11-02T12:44:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-construction-example/sssssjur</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-construction-example/sssssjur"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-construction-example/sssssjur"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-construction-example/sssssjur"/>
      <lastmod>2026-11-02T12:44:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/create-a-linear-system-to-solve-an-application-problem/sssssjuh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-a-linear-system-to-solve-an-application-problem/sssssjuh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-a-linear-system-to-solve-an-application-problem/sssssjuh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-a-linear-system-to-solve-an-application-problem/sssssjuh"/>
      <lastmod>2026-11-01T23:28:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/create-a-linear-system-to-solve-an-application-problem/sssssjuh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-a-linear-system-to-solve-an-application-problem/sssssjuh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-a-linear-system-to-solve-an-application-problem/sssssjuh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-a-linear-system-to-solve-an-application-problem/sssssjuh"/>
      <lastmod>2026-11-01T23:28:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prism-and-boxplot-integral-example/sssssjut</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-and-boxplot-integral-example/sssssjut"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-and-boxplot-integral-example/sssssjut"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-and-boxplot-integral-example/sssssjut"/>
      <lastmod>2026-11-01T23:57:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prism-and-boxplot-integral-example/sssssjut</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-and-boxplot-integral-example/sssssjut"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-and-boxplot-integral-example/sssssjut"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-and-boxplot-integral-example/sssssjut"/>
      <lastmod>2026-11-01T23:57:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-parallelograms/sssssjux</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-parallelograms/sssssjux"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-parallelograms/sssssjux"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-parallelograms/sssssjux"/>
      <lastmod>2026-11-01T20:37:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-parallelograms/sssssjux</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-parallelograms/sssssjux"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-parallelograms/sssssjux"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-parallelograms/sssssjux"/>
      <lastmod>2026-11-01T20:37:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-division-demonstration-by-diego-lieban-4/sssssjui</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-division-demonstration-by-diego-lieban-4/sssssjui"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-division-demonstration-by-diego-lieban-4/sssssjui"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-division-demonstration-by-diego-lieban-4/sssssjui"/>
      <lastmod>2026-11-02T18:29:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-division-demonstration-by-diego-lieban-4/sssssjui</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-division-demonstration-by-diego-lieban-4/sssssjui"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-division-demonstration-by-diego-lieban-4/sssssjui"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-division-demonstration-by-diego-lieban-4/sssssjui"/>
      <lastmod>2026-11-02T18:29:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prism-surface-area-by-ca-conwill/sssssjuo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-surface-area-by-ca-conwill/sssssjuo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-surface-area-by-ca-conwill/sssssjuo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-surface-area-by-ca-conwill/sssssjuo"/>
      <lastmod>2026-11-02T18:17:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prism-surface-area-by-ca-conwill/sssssjuo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-surface-area-by-ca-conwill/sssssjuo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-surface-area-by-ca-conwill/sssssjuo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-surface-area-by-ca-conwill/sssssjuo"/>
      <lastmod>2026-11-02T18:17:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-practice-1/sssssj5s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-practice-1/sssssj5s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-practice-1/sssssj5s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-practice-1/sssssj5s"/>
      <lastmod>2026-11-02T15:01:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-practice-1/sssssj5s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-practice-1/sssssj5s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-practice-1/sssssj5s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-practice-1/sssssj5s"/>
      <lastmod>2026-11-02T15:01:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-addition-area-model-with-common-denominator-visualization/sssssj57</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-area-model-with-common-denominator-visualization/sssssj57"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-area-model-with-common-denominator-visualization/sssssj57"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-area-model-with-common-denominator-visualization/sssssj57"/>
      <lastmod>2026-11-01T18:59:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-addition-area-model-with-common-denominator-visualization/sssssj57</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-area-model-with-common-denominator-visualization/sssssj57"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-area-model-with-common-denominator-visualization/sssssj57"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-area-model-with-common-denominator-visualization/sssssj57"/>
      <lastmod>2026-11-01T18:59:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-game/sssssj5n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-game/sssssj5n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-game/sssssj5n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-game/sssssj5n"/>
      <lastmod>2026-11-02T14:57:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-game/sssssj5n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-game/sssssj5n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-game/sssssj5n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-game/sssssj5n"/>
      <lastmod>2026-11-02T14:57:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-volume-dynamic-demo-integral-construction-from-base-to-apex/sssssj52</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-volume-dynamic-demo-integral-construction-from-base-to-apex/sssssj52"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-volume-dynamic-demo-integral-construction-from-base-to-apex/sssssj52"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-volume-dynamic-demo-integral-construction-from-base-to-apex/sssssj52"/>
      <lastmod>2026-11-01T20:48:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-volume-dynamic-demo-integral-construction-from-base-to-apex/sssssj52</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-volume-dynamic-demo-integral-construction-from-base-to-apex/sssssj52"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-volume-dynamic-demo-integral-construction-from-base-to-apex/sssssj52"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-volume-dynamic-demo-integral-construction-from-base-to-apex/sssssj52"/>
      <lastmod>2026-11-01T20:48:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lines-cut-by-a-transversal-not-necessarily-parallel/sssssj5k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lines-cut-by-a-transversal-not-necessarily-parallel/sssssj5k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lines-cut-by-a-transversal-not-necessarily-parallel/sssssj5k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lines-cut-by-a-transversal-not-necessarily-parallel/sssssj5k"/>
      <lastmod>2026-11-02T16:57:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lines-cut-by-a-transversal-not-necessarily-parallel/sssssj5k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lines-cut-by-a-transversal-not-necessarily-parallel/sssssj5k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lines-cut-by-a-transversal-not-necessarily-parallel/sssssj5k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lines-cut-by-a-transversal-not-necessarily-parallel/sssssj5k"/>
      <lastmod>2026-11-02T16:57:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-area/sssssj5z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-area/sssssj5z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-area/sssssj5z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-area/sssssj5z"/>
      <lastmod>2026-11-02T18:27:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-area/sssssj5z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-area/sssssj5z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-area/sssssj5z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-area/sssssj5z"/>
      <lastmod>2026-11-02T18:27:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/representing-fractions-on-number-line-1/sssssj50</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/representing-fractions-on-number-line-1/sssssj50"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/representing-fractions-on-number-line-1/sssssj50"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/representing-fractions-on-number-line-1/sssssj50"/>
      <lastmod>2026-11-02T18:54:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/representing-fractions-on-number-line-1/sssssj50</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/representing-fractions-on-number-line-1/sssssj50"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/representing-fractions-on-number-line-1/sssssj50"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/representing-fractions-on-number-line-1/sssssj50"/>
      <lastmod>2026-11-02T18:54:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-a-triangle-using-heron-s-formula/sssssj5d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-triangle-using-heron-s-formula/sssssj5d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-triangle-using-heron-s-formula/sssssj5d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-triangle-using-heron-s-formula/sssssj5d"/>
      <lastmod>2026-11-01T19:16:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-a-triangle-using-heron-s-formula/sssssj5d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-triangle-using-heron-s-formula/sssssj5d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-triangle-using-heron-s-formula/sssssj5d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-triangle-using-heron-s-formula/sssssj5d"/>
      <lastmod>2026-11-01T19:16:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logarithmic-functions-and-integrals/sssssj5f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-functions-and-integrals/sssssj5f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-functions-and-integrals/sssssj5f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-functions-and-integrals/sssssj5f"/>
      <lastmod>2026-11-02T16:57:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logarithmic-functions-and-integrals/sssssj5f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-functions-and-integrals/sssssj5f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-functions-and-integrals/sssssj5f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-functions-and-integrals/sssssj5f"/>
      <lastmod>2026-11-02T16:57:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/special-pair-of-lines-in-the-coordinate-plane/sssssj58</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-pair-of-lines-in-the-coordinate-plane/sssssj58"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-pair-of-lines-in-the-coordinate-plane/sssssj58"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-pair-of-lines-in-the-coordinate-plane/sssssj58"/>
      <lastmod>2026-11-02T17:45:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/special-pair-of-lines-in-the-coordinate-plane/sssssj58</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-pair-of-lines-in-the-coordinate-plane/sssssj58"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-pair-of-lines-in-the-coordinate-plane/sssssj58"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-pair-of-lines-in-the-coordinate-plane/sssssj58"/>
      <lastmod>2026-11-02T17:45:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conjugate-function-demo/sssssj5u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conjugate-function-demo/sssssj5u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conjugate-function-demo/sssssj5u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conjugate-function-demo/sssssj5u"/>
      <lastmod>2026-11-01T20:55:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conjugate-function-demo/sssssj5u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conjugate-function-demo/sssssj5u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conjugate-function-demo/sssssj5u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conjugate-function-demo/sssssj5u"/>
      <lastmod>2026-11-01T20:55:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-functions-in-different-representations-symbolic-to-graphical-matching/sssssj55</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions-in-different-representations-symbolic-to-graphical-matching/sssssj55"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions-in-different-representations-symbolic-to-graphical-matching/sssssj55"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions-in-different-representations-symbolic-to-graphical-matching/sssssj55"/>
      <lastmod>2026-11-02T17:04:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-functions-in-different-representations-symbolic-to-graphical-matching/sssssj55</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions-in-different-representations-symbolic-to-graphical-matching/sssssj55"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions-in-different-representations-symbolic-to-graphical-matching/sssssj55"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions-in-different-representations-symbolic-to-graphical-matching/sssssj55"/>
      <lastmod>2026-11-02T17:04:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/total-internal-reflection/sssssj5b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/total-internal-reflection/sssssj5b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/total-internal-reflection/sssssj5b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/total-internal-reflection/sssssj5b"/>
      <lastmod>2026-11-02T06:46:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/total-internal-reflection/sssssj5b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/total-internal-reflection/sssssj5b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/total-internal-reflection/sssssj5b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/total-internal-reflection/sssssj5b"/>
      <lastmod>2026-11-02T06:46:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-subtraction-estimation-practice-compare-differences-to-a-benchmark/sssssj53</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-subtraction-estimation-practice-compare-differences-to-a-benchmark/sssssj53"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-subtraction-estimation-practice-compare-differences-to-a-benchmark/sssssj53"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-subtraction-estimation-practice-compare-differences-to-a-benchmark/sssssj53"/>
      <lastmod>2026-11-01T21:11:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-subtraction-estimation-practice-compare-differences-to-a-benchmark/sssssj53</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-subtraction-estimation-practice-compare-differences-to-a-benchmark/sssssj53"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-subtraction-estimation-practice-compare-differences-to-a-benchmark/sssssj53"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-subtraction-estimation-practice-compare-differences-to-a-benchmark/sssssj53"/>
      <lastmod>2026-11-01T21:11:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-inscribed-in-semicircle/sssssj5q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-inscribed-in-semicircle/sssssj5q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-inscribed-in-semicircle/sssssj5q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-inscribed-in-semicircle/sssssj5q"/>
      <lastmod>2026-11-02T02:35:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-inscribed-in-semicircle/sssssj5q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-inscribed-in-semicircle/sssssj5q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-inscribed-in-semicircle/sssssj5q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-inscribed-in-semicircle/sssssj5q"/>
      <lastmod>2026-11-02T02:35:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilation-transformation-demo-by-patricia-arnold/sssssj51</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-transformation-demo-by-patricia-arnold/sssssj51"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-transformation-demo-by-patricia-arnold/sssssj51"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-transformation-demo-by-patricia-arnold/sssssj51"/>
      <lastmod>2026-11-02T11:05:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilation-transformation-demo-by-patricia-arnold/sssssj51</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-transformation-demo-by-patricia-arnold/sssssj51"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-transformation-demo-by-patricia-arnold/sssssj51"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-transformation-demo-by-patricia-arnold/sssssj51"/>
      <lastmod>2026-11-02T11:05:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-and-matrix-transformation-demo/sssssj5m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-and-matrix-transformation-demo/sssssj5m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-and-matrix-transformation-demo/sssssj5m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-and-matrix-transformation-demo/sssssj5m"/>
      <lastmod>2026-11-02T18:20:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-and-matrix-transformation-demo/sssssj5m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-and-matrix-transformation-demo/sssssj5m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-and-matrix-transformation-demo/sssssj5m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-and-matrix-transformation-demo/sssssj5m"/>
      <lastmod>2026-11-02T18:20:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-a-trapezoid-by-yerkin/sssssj5j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-trapezoid-by-yerkin/sssssj5j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-trapezoid-by-yerkin/sssssj5j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-trapezoid-by-yerkin/sssssj5j"/>
      <lastmod>2026-11-02T13:05:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-a-trapezoid-by-yerkin/sssssj5j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-trapezoid-by-yerkin/sssssj5j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-trapezoid-by-yerkin/sssssj5j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-trapezoid-by-yerkin/sssssj5j"/>
      <lastmod>2026-11-02T13:05:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-at-a-point/sssssj5p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-at-a-point/sssssj5p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-at-a-point/sssssj5p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-at-a-point/sssssj5p"/>
      <lastmod>2026-11-01T23:42:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-at-a-point/sssssj5p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-at-a-point/sssssj5p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-at-a-point/sssssj5p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-at-a-point/sssssj5p"/>
      <lastmod>2026-11-01T23:42:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/generate-all-pythagorean-triples/sssssj5w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/generate-all-pythagorean-triples/sssssj5w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/generate-all-pythagorean-triples/sssssj5w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/generate-all-pythagorean-triples/sssssj5w"/>
      <lastmod>2026-11-01T19:17:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/generate-all-pythagorean-triples/sssssj5w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/generate-all-pythagorean-triples/sssssj5w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/generate-all-pythagorean-triples/sssssj5w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/generate-all-pythagorean-triples/sssssj5w"/>
      <lastmod>2026-11-01T19:17:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equidistant-curve-from-two-parabolas/sssssj56</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equidistant-curve-from-two-parabolas/sssssj56"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equidistant-curve-from-two-parabolas/sssssj56"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equidistant-curve-from-two-parabolas/sssssj56"/>
      <lastmod>2026-11-02T12:24:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equidistant-curve-from-two-parabolas/sssssj56</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equidistant-curve-from-two-parabolas/sssssj56"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equidistant-curve-from-two-parabolas/sssssj56"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equidistant-curve-from-two-parabolas/sssssj56"/>
      <lastmod>2026-11-02T12:24:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conditions-for-parallelogram-2-dynamic-geometry/sssssj5g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conditions-for-parallelogram-2-dynamic-geometry/sssssj5g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conditions-for-parallelogram-2-dynamic-geometry/sssssj5g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conditions-for-parallelogram-2-dynamic-geometry/sssssj5g"/>
      <lastmod>2026-11-02T16:58:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conditions-for-parallelogram-2-dynamic-geometry/sssssj5g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conditions-for-parallelogram-2-dynamic-geometry/sssssj5g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conditions-for-parallelogram-2-dynamic-geometry/sssssj5g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conditions-for-parallelogram-2-dynamic-geometry/sssssj5g"/>
      <lastmod>2026-11-02T16:58:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-from-first-principles-demo-by-sam-vallentine/sssssj59</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-from-first-principles-demo-by-sam-vallentine/sssssj59"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-from-first-principles-demo-by-sam-vallentine/sssssj59"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-from-first-principles-demo-by-sam-vallentine/sssssj59"/>
      <lastmod>2026-11-02T18:36:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-from-first-principles-demo-by-sam-vallentine/sssssj59</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-from-first-principles-demo-by-sam-vallentine/sssssj59"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-from-first-principles-demo-by-sam-vallentine/sssssj59"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-from-first-principles-demo-by-sam-vallentine/sssssj59"/>
      <lastmod>2026-11-02T18:36:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mathematical-construction-of-f1-logo/sssssj5e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mathematical-construction-of-f1-logo/sssssj5e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mathematical-construction-of-f1-logo/sssssj5e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mathematical-construction-of-f1-logo/sssssj5e"/>
      <lastmod>2026-11-01T22:09:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mathematical-construction-of-f1-logo/sssssj5e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mathematical-construction-of-f1-logo/sssssj5e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mathematical-construction-of-f1-logo/sssssj5e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mathematical-construction-of-f1-logo/sssssj5e"/>
      <lastmod>2026-11-01T22:09:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tape-diagrams-in-algebra-with-examples-by-artipal81-5/sssssj5v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tape-diagrams-in-algebra-with-examples-by-artipal81-5/sssssj5v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tape-diagrams-in-algebra-with-examples-by-artipal81-5/sssssj5v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tape-diagrams-in-algebra-with-examples-by-artipal81-5/sssssj5v"/>
      <lastmod>2026-11-01T20:48:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tape-diagrams-in-algebra-with-examples-by-artipal81-5/sssssj5v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tape-diagrams-in-algebra-with-examples-by-artipal81-5/sssssj5v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tape-diagrams-in-algebra-with-examples-by-artipal81-5/sssssj5v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tape-diagrams-in-algebra-with-examples-by-artipal81-5/sssssj5v"/>
      <lastmod>2026-11-01T20:48:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-cone-by-richard-wade/sssssj54</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-cone-by-richard-wade/sssssj54"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-cone-by-richard-wade/sssssj54"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-cone-by-richard-wade/sssssj54"/>
      <lastmod>2026-11-02T00:33:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-cone-by-richard-wade/sssssj54</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-cone-by-richard-wade/sssssj54"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-cone-by-richard-wade/sssssj54"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-cone-by-richard-wade/sssssj54"/>
      <lastmod>2026-11-02T00:33:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/no-bending-or-stretching-geometric-construction/sssssj5l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/no-bending-or-stretching-geometric-construction/sssssj5l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/no-bending-or-stretching-geometric-construction/sssssj5l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/no-bending-or-stretching-geometric-construction/sssssj5l"/>
      <lastmod>2026-11-01T20:33:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/no-bending-or-stretching-geometric-construction/sssssj5l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/no-bending-or-stretching-geometric-construction/sssssj5l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/no-bending-or-stretching-geometric-construction/sssssj5l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/no-bending-or-stretching-geometric-construction/sssssj5l"/>
      <lastmod>2026-11-01T20:33:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bp-logo/sssssj5y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bp-logo/sssssj5y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bp-logo/sssssj5y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bp-logo/sssssj5y"/>
      <lastmod>2026-11-02T18:25:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bp-logo/sssssj5y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bp-logo/sssssj5y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bp-logo/sssssj5y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bp-logo/sssssj5y"/>
      <lastmod>2026-11-02T18:25:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/functions-and-their-derivatives/sssssj5a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/functions-and-their-derivatives/sssssj5a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/functions-and-their-derivatives/sssssj5a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/functions-and-their-derivatives/sssssj5a"/>
      <lastmod>2026-11-02T11:46:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/functions-and-their-derivatives/sssssj5a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/functions-and-their-derivatives/sssssj5a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/functions-and-their-derivatives/sssssj5a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/functions-and-their-derivatives/sssssj5a"/>
      <lastmod>2026-11-02T11:46:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interesting-tile-like-surface/sssssj5c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interesting-tile-like-surface/sssssj5c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interesting-tile-like-surface/sssssj5c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interesting-tile-like-surface/sssssj5c"/>
      <lastmod>2026-11-02T02:48:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interesting-tile-like-surface/sssssj5c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interesting-tile-like-surface/sssssj5c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interesting-tile-like-surface/sssssj5c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interesting-tile-like-surface/sssssj5c"/>
      <lastmod>2026-11-02T02:48:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-visualization-of-normal-distribution-and-hypothesis-testing/sssssj5r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-visualization-of-normal-distribution-and-hypothesis-testing/sssssj5r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-visualization-of-normal-distribution-and-hypothesis-testing/sssssj5r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-visualization-of-normal-distribution-and-hypothesis-testing/sssssj5r"/>
      <lastmod>2026-11-02T18:53:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-visualization-of-normal-distribution-and-hypothesis-testing/sssssj5r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-visualization-of-normal-distribution-and-hypothesis-testing/sssssj5r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-visualization-of-normal-distribution-and-hypothesis-testing/sssssj5r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-visualization-of-normal-distribution-and-hypothesis-testing/sssssj5r"/>
      <lastmod>2026-11-02T18:53:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/homotopy-roman-surface-vs-boy-surface/sssssj5h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/homotopy-roman-surface-vs-boy-surface/sssssj5h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/homotopy-roman-surface-vs-boy-surface/sssssj5h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/homotopy-roman-surface-vs-boy-surface/sssssj5h"/>
      <lastmod>2026-11-02T02:18:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/homotopy-roman-surface-vs-boy-surface/sssssj5h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/homotopy-roman-surface-vs-boy-surface/sssssj5h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/homotopy-roman-surface-vs-boy-surface/sssssj5h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/homotopy-roman-surface-vs-boy-surface/sssssj5h"/>
      <lastmod>2026-11-02T02:18:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-area-relationships-between-triangles-and-squares/sssssj5t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-area-relationships-between-triangles-and-squares/sssssj5t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-area-relationships-between-triangles-and-squares/sssssj5t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-area-relationships-between-triangles-and-squares/sssssj5t"/>
      <lastmod>2026-11-02T00:02:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-area-relationships-between-triangles-and-squares/sssssj5t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-area-relationships-between-triangles-and-squares/sssssj5t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-area-relationships-between-triangles-and-squares/sssssj5t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-area-relationships-between-triangles-and-squares/sssssj5t"/>
      <lastmod>2026-11-02T00:02:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/planes-and-intersections-i/sssssj5x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planes-and-intersections-i/sssssj5x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes-and-intersections-i/sssssj5x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes-and-intersections-i/sssssj5x"/>
      <lastmod>2026-11-02T18:58:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/planes-and-intersections-i/sssssj5x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planes-and-intersections-i/sssssj5x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes-and-intersections-i/sssssj5x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes-and-intersections-i/sssssj5x"/>
      <lastmod>2026-11-02T18:58:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arc-on-a-circle/sssssj5i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arc-on-a-circle/sssssj5i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arc-on-a-circle/sssssj5i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arc-on-a-circle/sssssj5i"/>
      <lastmod>2026-11-02T18:03:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arc-on-a-circle/sssssj5i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arc-on-a-circle/sssssj5i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arc-on-a-circle/sssssj5i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arc-on-a-circle/sssssj5i"/>
      <lastmod>2026-11-02T18:03:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/find-unknown-angles/sssssj5o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-unknown-angles/sssssj5o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-unknown-angles/sssssj5o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-unknown-angles/sssssj5o"/>
      <lastmod>2026-11-01T19:25:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/find-unknown-angles/sssssj5o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-unknown-angles/sssssj5o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-unknown-angles/sssssj5o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-unknown-angles/sssssj5o"/>
      <lastmod>2026-11-01T19:25:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/scutoides-geometric-construction/sssssjbs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scutoides-geometric-construction/sssssjbs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scutoides-geometric-construction/sssssjbs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scutoides-geometric-construction/sssssjbs"/>
      <lastmod>2026-11-02T03:01:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/scutoides-geometric-construction/sssssjbs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scutoides-geometric-construction/sssssjbs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scutoides-geometric-construction/sssssjbs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scutoides-geometric-construction/sssssjbs"/>
      <lastmod>2026-11-02T03:01:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/missouri-covid-19-growth-model/sssssjb7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/missouri-covid-19-growth-model/sssssjb7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/missouri-covid-19-growth-model/sssssjb7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/missouri-covid-19-growth-model/sssssjb7"/>
      <lastmod>2026-11-01T19:05:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/missouri-covid-19-growth-model/sssssjb7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/missouri-covid-19-growth-model/sssssjb7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/missouri-covid-19-growth-model/sssssjb7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/missouri-covid-19-growth-model/sssssjb7"/>
      <lastmod>2026-11-01T19:05:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-and-reflection-in-geometry/sssssjbn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-and-reflection-in-geometry/sssssjbn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-and-reflection-in-geometry/sssssjbn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-and-reflection-in-geometry/sssssjbn"/>
      <lastmod>2026-11-02T18:40:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-and-reflection-in-geometry/sssssjbn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-and-reflection-in-geometry/sssssjbn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-and-reflection-in-geometry/sssssjbn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-and-reflection-in-geometry/sssssjbn"/>
      <lastmod>2026-11-02T18:40:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/medians-and-centroid-theorem/sssssjb2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/medians-and-centroid-theorem/sssssjb2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/medians-and-centroid-theorem/sssssjb2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/medians-and-centroid-theorem/sssssjb2"/>
      <lastmod>2026-11-01T21:38:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/medians-and-centroid-theorem/sssssjb2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/medians-and-centroid-theorem/sssssjb2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/medians-and-centroid-theorem/sssssjb2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/medians-and-centroid-theorem/sssssjb2"/>
      <lastmod>2026-11-01T21:38:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/application-of-rectangle-perimeter-dynamic-exploration-of-area-variation/sssssjbk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/application-of-rectangle-perimeter-dynamic-exploration-of-area-variation/sssssjbk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/application-of-rectangle-perimeter-dynamic-exploration-of-area-variation/sssssjbk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/application-of-rectangle-perimeter-dynamic-exploration-of-area-variation/sssssjbk"/>
      <lastmod>2026-11-02T00:03:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/application-of-rectangle-perimeter-dynamic-exploration-of-area-variation/sssssjbk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/application-of-rectangle-perimeter-dynamic-exploration-of-area-variation/sssssjbk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/application-of-rectangle-perimeter-dynamic-exploration-of-area-variation/sssssjbk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/application-of-rectangle-perimeter-dynamic-exploration-of-area-variation/sssssjbk"/>
      <lastmod>2026-11-02T00:03:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-parametric-curves-and-function-visualization/sssssjbz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-parametric-curves-and-function-visualization/sssssjbz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-parametric-curves-and-function-visualization/sssssjbz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-parametric-curves-and-function-visualization/sssssjbz"/>
      <lastmod>2026-11-02T00:11:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-parametric-curves-and-function-visualization/sssssjbz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-parametric-curves-and-function-visualization/sssssjbz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-parametric-curves-and-function-visualization/sssssjbz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-parametric-curves-and-function-visualization/sssssjbz"/>
      <lastmod>2026-11-02T00:11:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-in-x-axis-y-axis-y-x-observe-coordinates/sssssjb0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-in-x-axis-y-axis-y-x-observe-coordinates/sssssjb0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-in-x-axis-y-axis-y-x-observe-coordinates/sssssjb0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-in-x-axis-y-axis-y-x-observe-coordinates/sssssjb0"/>
      <lastmod>2026-11-02T08:54:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-in-x-axis-y-axis-y-x-observe-coordinates/sssssjb0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-in-x-axis-y-axis-y-x-observe-coordinates/sssssjb0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-in-x-axis-y-axis-y-x-observe-coordinates/sssssjb0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-in-x-axis-y-axis-y-x-observe-coordinates/sssssjb0"/>
      <lastmod>2026-11-02T08:54:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arithmetic-adventure/sssssjbd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-adventure/sssssjbd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-adventure/sssssjbd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-adventure/sssssjbd"/>
      <lastmod>2026-11-02T03:11:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arithmetic-adventure/sssssjbd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-adventure/sssssjbd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-adventure/sssssjbd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-adventure/sssssjbd"/>
      <lastmod>2026-11-02T03:11:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/horizontal-translation-by-zq/sssssjbf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-translation-by-zq/sssssjbf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-translation-by-zq/sssssjbf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-translation-by-zq/sssssjbf"/>
      <lastmod>2026-11-01T21:03:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/horizontal-translation-by-zq/sssssjbf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-translation-by-zq/sssssjbf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-translation-by-zq/sssssjbf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-translation-by-zq/sssssjbf"/>
      <lastmod>2026-11-01T21:03:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gerdes-rectangle-axiom/sssssjb8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gerdes-rectangle-axiom/sssssjb8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gerdes-rectangle-axiom/sssssjb8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gerdes-rectangle-axiom/sssssjb8"/>
      <lastmod>2026-11-02T18:33:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gerdes-rectangle-axiom/sssssjb8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gerdes-rectangle-axiom/sssssjb8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gerdes-rectangle-axiom/sssssjb8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gerdes-rectangle-axiom/sssssjb8"/>
      <lastmod>2026-11-02T18:33:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sum-of-squares-of-four-consecutive-prime-numbers-for-2020/sssssjbu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-squares-of-four-consecutive-prime-numbers-for-2020/sssssjbu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-squares-of-four-consecutive-prime-numbers-for-2020/sssssjbu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-squares-of-four-consecutive-prime-numbers-for-2020/sssssjbu"/>
      <lastmod>2026-11-01T21:03:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sum-of-squares-of-four-consecutive-prime-numbers-for-2020/sssssjbu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-squares-of-four-consecutive-prime-numbers-for-2020/sssssjbu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-squares-of-four-consecutive-prime-numbers-for-2020/sssssjbu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-squares-of-four-consecutive-prime-numbers-for-2020/sssssjbu"/>
      <lastmod>2026-11-01T21:03:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/concept-of-confidence-intervals-by-heather-pierce/sssssjb5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/concept-of-confidence-intervals-by-heather-pierce/sssssjb5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/concept-of-confidence-intervals-by-heather-pierce/sssssjb5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/concept-of-confidence-intervals-by-heather-pierce/sssssjb5"/>
      <lastmod>2026-11-01T20:47:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/concept-of-confidence-intervals-by-heather-pierce/sssssjb5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/concept-of-confidence-intervals-by-heather-pierce/sssssjb5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/concept-of-confidence-intervals-by-heather-pierce/sssssjb5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/concept-of-confidence-intervals-by-heather-pierce/sssssjb5"/>
      <lastmod>2026-11-01T20:47:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/eigenvectors-4/sssssjbb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eigenvectors-4/sssssjbb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eigenvectors-4/sssssjbb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eigenvectors-4/sssssjbb"/>
      <lastmod>2026-11-02T17:35:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/eigenvectors-4/sssssjbb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eigenvectors-4/sssssjbb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eigenvectors-4/sssssjbb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eigenvectors-4/sssssjbb"/>
      <lastmod>2026-11-02T17:35:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-translation-simulation/sssssjb3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-translation-simulation/sssssjb3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-translation-simulation/sssssjb3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-translation-simulation/sssssjb3"/>
      <lastmod>2026-11-02T00:25:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-translation-simulation/sssssjb3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-translation-simulation/sssssjb3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-translation-simulation/sssssjb3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-translation-simulation/sssssjb3"/>
      <lastmod>2026-11-02T00:25:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-interactive-exploration/sssssjbq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-interactive-exploration/sssssjbq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-interactive-exploration/sssssjbq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-interactive-exploration/sssssjbq"/>
      <lastmod>2026-11-02T00:00:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-interactive-exploration/sssssjbq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-interactive-exploration/sssssjbq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-interactive-exploration/sssssjbq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-interactive-exploration/sssssjbq"/>
      <lastmod>2026-11-02T00:00:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integral-vs-midpoint-rectangle-sum/sssssjb1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integral-vs-midpoint-rectangle-sum/sssssjb1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integral-vs-midpoint-rectangle-sum/sssssjb1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integral-vs-midpoint-rectangle-sum/sssssjb1"/>
      <lastmod>2026-11-02T00:07:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integral-vs-midpoint-rectangle-sum/sssssjb1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integral-vs-midpoint-rectangle-sum/sssssjb1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integral-vs-midpoint-rectangle-sum/sssssjb1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integral-vs-midpoint-rectangle-sum/sssssjb1"/>
      <lastmod>2026-11-02T00:07:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-demonstration-by-a-barousse/sssssjbm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-demonstration-by-a-barousse/sssssjbm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-demonstration-by-a-barousse/sssssjbm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-demonstration-by-a-barousse/sssssjbm"/>
      <lastmod>2026-11-02T17:07:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-demonstration-by-a-barousse/sssssjbm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-demonstration-by-a-barousse/sssssjbm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-demonstration-by-a-barousse/sssssjbm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-demonstration-by-a-barousse/sssssjbm"/>
      <lastmod>2026-11-02T17:07:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-properties-of-a-parallelogram/sssssjbj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-properties-of-a-parallelogram/sssssjbj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-properties-of-a-parallelogram/sssssjbj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-properties-of-a-parallelogram/sssssjbj"/>
      <lastmod>2026-11-01T19:15:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-properties-of-a-parallelogram/sssssjbj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-properties-of-a-parallelogram/sssssjbj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-properties-of-a-parallelogram/sssssjbj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-properties-of-a-parallelogram/sssssjbj"/>
      <lastmod>2026-11-01T19:15:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-with-variable-areas-in-right-tail/sssssjbp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-with-variable-areas-in-right-tail/sssssjbp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-with-variable-areas-in-right-tail/sssssjbp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-with-variable-areas-in-right-tail/sssssjbp"/>
      <lastmod>2026-11-02T13:15:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-with-variable-areas-in-right-tail/sssssjbp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-with-variable-areas-in-right-tail/sssssjbp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-with-variable-areas-in-right-tail/sssssjbp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-with-variable-areas-in-right-tail/sssssjbp"/>
      <lastmod>2026-11-02T13:15:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/radius-and-circumference-of-a-circle/sssssjbw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/radius-and-circumference-of-a-circle/sssssjbw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/radius-and-circumference-of-a-circle/sssssjbw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/radius-and-circumference-of-a-circle/sssssjbw"/>
      <lastmod>2026-11-01T19:02:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/radius-and-circumference-of-a-circle/sssssjbw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/radius-and-circumference-of-a-circle/sssssjbw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/radius-and-circumference-of-a-circle/sssssjbw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/radius-and-circumference-of-a-circle/sssssjbw"/>
      <lastmod>2026-11-01T19:02:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/archimedean-principle-demo/sssssjb6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/archimedean-principle-demo/sssssjb6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/archimedean-principle-demo/sssssjb6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/archimedean-principle-demo/sssssjb6"/>
      <lastmod>2026-11-01T23:24:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/archimedean-principle-demo/sssssjb6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/archimedean-principle-demo/sssssjb6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/archimedean-principle-demo/sssssjb6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/archimedean-principle-demo/sssssjb6"/>
      <lastmod>2026-11-01T23:24:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-for-a-rectangular-prism/sssssjbg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-for-a-rectangular-prism/sssssjbg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-for-a-rectangular-prism/sssssjbg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-for-a-rectangular-prism/sssssjbg"/>
      <lastmod>2026-11-02T09:07:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-for-a-rectangular-prism/sssssjbg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-for-a-rectangular-prism/sssssjbg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-for-a-rectangular-prism/sssssjbg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-for-a-rectangular-prism/sssssjbg"/>
      <lastmod>2026-11-02T09:07:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-and-cylinder/sssssjb9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-and-cylinder/sssssjb9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-and-cylinder/sssssjb9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-and-cylinder/sssssjb9"/>
      <lastmod>2026-11-02T08:45:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-and-cylinder/sssssjb9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-and-cylinder/sssssjb9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-and-cylinder/sssssjb9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-and-cylinder/sssssjb9"/>
      <lastmod>2026-11-02T08:45:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-function-transformation-demo/sssssjbe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-function-transformation-demo/sssssjbe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-function-transformation-demo/sssssjbe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-function-transformation-demo/sssssjbe"/>
      <lastmod>2026-11-02T00:12:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-function-transformation-demo/sssssjbe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-function-transformation-demo/sssssjbe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-function-transformation-demo/sssssjbe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-function-transformation-demo/sssssjbe"/>
      <lastmod>2026-11-02T00:12:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/optimization-of-a-box-without-top/sssssjbv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/optimization-of-a-box-without-top/sssssjbv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/optimization-of-a-box-without-top/sssssjbv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/optimization-of-a-box-without-top/sssssjbv"/>
      <lastmod>2026-11-01T23:12:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/optimization-of-a-box-without-top/sssssjbv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/optimization-of-a-box-without-top/sssssjbv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/optimization-of-a-box-without-top/sssssjbv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/optimization-of-a-box-without-top/sssssjbv"/>
      <lastmod>2026-11-01T23:12:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/truncated-biscribed-pentakis-dependence-of-vertex-average-distance-on-truncatio/sssssjb4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-biscribed-pentakis-dependence-of-vertex-average-distance-on-truncatio/sssssjb4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-biscribed-pentakis-dependence-of-vertex-average-distance-on-truncatio/sssssjb4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-biscribed-pentakis-dependence-of-vertex-average-distance-on-truncatio/sssssjb4"/>
      <lastmod>2026-11-01T20:58:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/truncated-biscribed-pentakis-dependence-of-vertex-average-distance-on-truncatio/sssssjb4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-biscribed-pentakis-dependence-of-vertex-average-distance-on-truncatio/sssssjb4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-biscribed-pentakis-dependence-of-vertex-average-distance-on-truncatio/sssssjb4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-biscribed-pentakis-dependence-of-vertex-average-distance-on-truncatio/sssssjb4"/>
      <lastmod>2026-11-01T20:58:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circumcenter-demo/sssssjbl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumcenter-demo/sssssjbl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumcenter-demo/sssssjbl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumcenter-demo/sssssjbl"/>
      <lastmod>2026-11-02T16:39:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circumcenter-demo/sssssjbl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumcenter-demo/sssssjbl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumcenter-demo/sssssjbl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumcenter-demo/sssssjbl"/>
      <lastmod>2026-11-02T16:39:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/correlation-study/sssssjby</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/correlation-study/sssssjby"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/correlation-study/sssssjby"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/correlation-study/sssssjby"/>
      <lastmod>2026-11-02T18:08:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/correlation-study/sssssjby</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/correlation-study/sssssjby"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/correlation-study/sssssjby"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/correlation-study/sssssjby"/>
      <lastmod>2026-11-02T18:08:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/new-decagon-construction/sssssjba</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/new-decagon-construction/sssssjba"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/new-decagon-construction/sssssjba"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/new-decagon-construction/sssssjba"/>
      <lastmod>2026-11-02T02:35:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/new-decagon-construction/sssssjba</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/new-decagon-construction/sssssjba"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/new-decagon-construction/sssssjba"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/new-decagon-construction/sssssjba"/>
      <lastmod>2026-11-02T02:35:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-9-5-dilations/sssssjbc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-9-5-dilations/sssssjbc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-9-5-dilations/sssssjbc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-9-5-dilations/sssssjbc"/>
      <lastmod>2026-11-01T23:18:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-9-5-dilations/sssssjbc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-9-5-dilations/sssssjbc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-9-5-dilations/sssssjbc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-9-5-dilations/sssssjbc"/>
      <lastmod>2026-11-01T23:18:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/riemann-surface-1-z-2-1-2/sssssjbr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-surface-1-z-2-1-2/sssssjbr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-surface-1-z-2-1-2/sssssjbr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-surface-1-z-2-1-2/sssssjbr"/>
      <lastmod>2026-11-02T16:43:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/riemann-surface-1-z-2-1-2/sssssjbr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-surface-1-z-2-1-2/sssssjbr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-surface-1-z-2-1-2/sssssjbr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-surface-1-z-2-1-2/sssssjbr"/>
      <lastmod>2026-11-02T16:43:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-ferris-wheel-cart-guess-and-test/sssssjbh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-ferris-wheel-cart-guess-and-test/sssssjbh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-ferris-wheel-cart-guess-and-test/sssssjbh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-ferris-wheel-cart-guess-and-test/sssssjbh"/>
      <lastmod>2026-11-02T09:18:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-ferris-wheel-cart-guess-and-test/sssssjbh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-ferris-wheel-cart-guess-and-test/sssssjbh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-ferris-wheel-cart-guess-and-test/sssssjbh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-ferris-wheel-cart-guess-and-test/sssssjbh"/>
      <lastmod>2026-11-02T09:18:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lines-planes-vector-forms-by-james-d-factor/sssssjbt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lines-planes-vector-forms-by-james-d-factor/sssssjbt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lines-planes-vector-forms-by-james-d-factor/sssssjbt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lines-planes-vector-forms-by-james-d-factor/sssssjbt"/>
      <lastmod>2026-11-02T17:47:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lines-planes-vector-forms-by-james-d-factor/sssssjbt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lines-planes-vector-forms-by-james-d-factor/sssssjbt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lines-planes-vector-forms-by-james-d-factor/sssssjbt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lines-planes-vector-forms-by-james-d-factor/sssssjbt"/>
      <lastmod>2026-11-02T17:47:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-number-translation/sssssjbx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-translation/sssssjbx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-translation/sssssjbx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-translation/sssssjbx"/>
      <lastmod>2026-11-01T19:37:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-number-translation/sssssjbx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-translation/sssssjbx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-translation/sssssjbx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-translation/sssssjbx"/>
      <lastmod>2026-11-01T19:37:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graph-quadratic-functions/sssssjbi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-quadratic-functions/sssssjbi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-quadratic-functions/sssssjbi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-quadratic-functions/sssssjbi"/>
      <lastmod>2026-11-02T02:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graph-quadratic-functions/sssssjbi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-quadratic-functions/sssssjbi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-quadratic-functions/sssssjbi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-quadratic-functions/sssssjbi"/>
      <lastmod>2026-11-02T02:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-islamic-geometric-patterns/sssssjbo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-islamic-geometric-patterns/sssssjbo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-islamic-geometric-patterns/sssssjbo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-islamic-geometric-patterns/sssssjbo"/>
      <lastmod>2026-11-01T21:07:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-islamic-geometric-patterns/sssssjbo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-islamic-geometric-patterns/sssssjbo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-islamic-geometric-patterns/sssssjbo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-islamic-geometric-patterns/sssssjbo"/>
      <lastmod>2026-11-01T21:07:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-of-a-point-by-a-vector/sssssj3s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-of-a-point-by-a-vector/sssssj3s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-of-a-point-by-a-vector/sssssj3s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-of-a-point-by-a-vector/sssssj3s"/>
      <lastmod>2026-11-01T22:02:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-of-a-point-by-a-vector/sssssj3s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-of-a-point-by-a-vector/sssssj3s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-of-a-point-by-a-vector/sssssj3s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-of-a-point-by-a-vector/sssssj3s"/>
      <lastmod>2026-11-01T22:02:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-graceybrown/sssssj37</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-graceybrown/sssssj37"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-graceybrown/sssssj37"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-graceybrown/sssssj37"/>
      <lastmod>2026-11-02T15:34:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-graceybrown/sssssj37</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-graceybrown/sssssj37"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-graceybrown/sssssj37"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-graceybrown/sssssj37"/>
      <lastmod>2026-11-02T15:34:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-rational-numbers-on-a-horizontal-line/sssssj3n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-rational-numbers-on-a-horizontal-line/sssssj3n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-rational-numbers-on-a-horizontal-line/sssssj3n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-rational-numbers-on-a-horizontal-line/sssssj3n"/>
      <lastmod>2026-11-02T02:25:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-rational-numbers-on-a-horizontal-line/sssssj3n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-rational-numbers-on-a-horizontal-line/sssssj3n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-rational-numbers-on-a-horizontal-line/sssssj3n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-rational-numbers-on-a-horizontal-line/sssssj3n"/>
      <lastmod>2026-11-02T02:25:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-and-prism/sssssj32</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-and-prism/sssssj32"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-and-prism/sssssj32"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-and-prism/sssssj32"/>
      <lastmod>2026-11-02T13:43:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-and-prism/sssssj32</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-and-prism/sssssj32"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-and-prism/sssssj32"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-and-prism/sssssj32"/>
      <lastmod>2026-11-02T13:43:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadrilaterals-formed-by-two-isosceles-triangles/sssssj3k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilaterals-formed-by-two-isosceles-triangles/sssssj3k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilaterals-formed-by-two-isosceles-triangles/sssssj3k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilaterals-formed-by-two-isosceles-triangles/sssssj3k"/>
      <lastmod>2026-11-02T18:37:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadrilaterals-formed-by-two-isosceles-triangles/sssssj3k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilaterals-formed-by-two-isosceles-triangles/sssssj3k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilaterals-formed-by-two-isosceles-triangles/sssssj3k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilaterals-formed-by-two-isosceles-triangles/sssssj3k"/>
      <lastmod>2026-11-02T18:37:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-transformation-demo-by-steve-phelps/sssssj3z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-transformation-demo-by-steve-phelps/sssssj3z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-transformation-demo-by-steve-phelps/sssssj3z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-transformation-demo-by-steve-phelps/sssssj3z"/>
      <lastmod>2026-11-02T10:46:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-transformation-demo-by-steve-phelps/sssssj3z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-transformation-demo-by-steve-phelps/sssssj3z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-transformation-demo-by-steve-phelps/sssssj3z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-transformation-demo-by-steve-phelps/sssssj3z"/>
      <lastmod>2026-11-02T10:46:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-exploration/sssssj30</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-exploration/sssssj30"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-exploration/sssssj30"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-exploration/sssssj30"/>
      <lastmod>2026-11-01T23:40:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-exploration/sssssj30</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-exploration/sssssj30"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-exploration/sssssj30"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-exploration/sssssj30"/>
      <lastmod>2026-11-01T23:40:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/200-meter-distance-sketch/sssssj3d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/200-meter-distance-sketch/sssssj3d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/200-meter-distance-sketch/sssssj3d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/200-meter-distance-sketch/sssssj3d"/>
      <lastmod>2026-11-02T16:57:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/200-meter-distance-sketch/sssssj3d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/200-meter-distance-sketch/sssssj3d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/200-meter-distance-sketch/sssssj3d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/200-meter-distance-sketch/sssssj3d"/>
      <lastmod>2026-11-02T16:57:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/math-and-news-what-is-a-coronavirus-geometric-modeling-of-a-virus/sssssj3f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/math-and-news-what-is-a-coronavirus-geometric-modeling-of-a-virus/sssssj3f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/math-and-news-what-is-a-coronavirus-geometric-modeling-of-a-virus/sssssj3f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/math-and-news-what-is-a-coronavirus-geometric-modeling-of-a-virus/sssssj3f"/>
      <lastmod>2026-11-01T20:53:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/math-and-news-what-is-a-coronavirus-geometric-modeling-of-a-virus/sssssj3f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/math-and-news-what-is-a-coronavirus-geometric-modeling-of-a-virus/sssssj3f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/math-and-news-what-is-a-coronavirus-geometric-modeling-of-a-virus/sssssj3f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/math-and-news-what-is-a-coronavirus-geometric-modeling-of-a-virus/sssssj3f"/>
      <lastmod>2026-11-01T20:53:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vargas-orthocenter/sssssj38</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vargas-orthocenter/sssssj38"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vargas-orthocenter/sssssj38"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vargas-orthocenter/sssssj38"/>
      <lastmod>2026-11-02T16:42:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vargas-orthocenter/sssssj38</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vargas-orthocenter/sssssj38"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vargas-orthocenter/sssssj38"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vargas-orthocenter/sssssj38"/>
      <lastmod>2026-11-02T16:42:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-representation-of-complex-number-multiplication-by-eugene-kritchevski/sssssj3u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-representation-of-complex-number-multiplication-by-eugene-kritchevski/sssssj3u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-representation-of-complex-number-multiplication-by-eugene-kritchevski/sssssj3u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-representation-of-complex-number-multiplication-by-eugene-kritchevski/sssssj3u"/>
      <lastmod>2026-11-02T18:36:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-representation-of-complex-number-multiplication-by-eugene-kritchevski/sssssj3u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-representation-of-complex-number-multiplication-by-eugene-kritchevski/sssssj3u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-representation-of-complex-number-multiplication-by-eugene-kritchevski/sssssj3u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-representation-of-complex-number-multiplication-by-eugene-kritchevski/sssssj3u"/>
      <lastmod>2026-11-02T18:36:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/activity-3-translation-symmetry/sssssj35</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/activity-3-translation-symmetry/sssssj35"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/activity-3-translation-symmetry/sssssj35"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/activity-3-translation-symmetry/sssssj35"/>
      <lastmod>2026-11-02T13:32:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/activity-3-translation-symmetry/sssssj35</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/activity-3-translation-symmetry/sssssj35"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/activity-3-translation-symmetry/sssssj35"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/activity-3-translation-symmetry/sssssj35"/>
      <lastmod>2026-11-02T13:32:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cotangent-function-exploration/sssssj3b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cotangent-function-exploration/sssssj3b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cotangent-function-exploration/sssssj3b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cotangent-function-exploration/sssssj3b"/>
      <lastmod>2026-11-02T00:03:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cotangent-function-exploration/sssssj3b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cotangent-function-exploration/sssssj3b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cotangent-function-exploration/sssssj3b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cotangent-function-exploration/sssssj3b"/>
      <lastmod>2026-11-02T00:03:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-the-sphere/sssssj33</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-the-sphere/sssssj33"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-the-sphere/sssssj33"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-the-sphere/sssssj33"/>
      <lastmod>2026-11-01T21:02:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-the-sphere/sssssj33</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-the-sphere/sssssj33"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-the-sphere/sssssj33"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-the-sphere/sssssj33"/>
      <lastmod>2026-11-01T21:02:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractions-decimals-and-percents-on-a-number-line/sssssj3q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-decimals-and-percents-on-a-number-line/sssssj3q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-decimals-and-percents-on-a-number-line/sssssj3q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-decimals-and-percents-on-a-number-line/sssssj3q"/>
      <lastmod>2026-11-02T09:08:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractions-decimals-and-percents-on-a-number-line/sssssj3q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-decimals-and-percents-on-a-number-line/sssssj3q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-decimals-and-percents-on-a-number-line/sssssj3q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-decimals-and-percents-on-a-number-line/sssssj3q"/>
      <lastmod>2026-11-02T09:08:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-derivative-of-the-sine-function/sssssj31</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-derivative-of-the-sine-function/sssssj31"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-derivative-of-the-sine-function/sssssj31"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-derivative-of-the-sine-function/sssssj31"/>
      <lastmod>2026-11-02T02:58:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-derivative-of-the-sine-function/sssssj31</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-derivative-of-the-sine-function/sssssj31"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-derivative-of-the-sine-function/sssssj31"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-derivative-of-the-sine-function/sssssj31"/>
      <lastmod>2026-11-02T02:58:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-a-square-pyramid-and-a-plane/sssssj3m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-a-square-pyramid-and-a-plane/sssssj3m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-a-square-pyramid-and-a-plane/sssssj3m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-a-square-pyramid-and-a-plane/sssssj3m"/>
      <lastmod>2026-11-02T02:30:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-a-square-pyramid-and-a-plane/sssssj3m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-a-square-pyramid-and-a-plane/sssssj3m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-a-square-pyramid-and-a-plane/sssssj3m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-a-square-pyramid-and-a-plane/sssssj3m"/>
      <lastmod>2026-11-02T02:30:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/h2m-2019-p1-q11a/sssssj3j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/h2m-2019-p1-q11a/sssssj3j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/h2m-2019-p1-q11a/sssssj3j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/h2m-2019-p1-q11a/sssssj3j"/>
      <lastmod>2026-11-01T20:40:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/h2m-2019-p1-q11a/sssssj3j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/h2m-2019-p1-q11a/sssssj3j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/h2m-2019-p1-q11a/sssssj3j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/h2m-2019-p1-q11a/sssssj3j"/>
      <lastmod>2026-11-01T20:40:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/math1023-directional-derivative-definition-demo/sssssj3p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/math1023-directional-derivative-definition-demo/sssssj3p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/math1023-directional-derivative-definition-demo/sssssj3p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/math1023-directional-derivative-definition-demo/sssssj3p"/>
      <lastmod>2026-11-02T02:23:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/math1023-directional-derivative-definition-demo/sssssj3p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/math1023-directional-derivative-definition-demo/sssssj3p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/math1023-directional-derivative-definition-demo/sssssj3p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/math1023-directional-derivative-definition-demo/sssssj3p"/>
      <lastmod>2026-11-02T02:23:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/basic-negative-numbers-escape-room-challenge-by-lew-w-s/sssssj3w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-negative-numbers-escape-room-challenge-by-lew-w-s/sssssj3w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-negative-numbers-escape-room-challenge-by-lew-w-s/sssssj3w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-negative-numbers-escape-room-challenge-by-lew-w-s/sssssj3w"/>
      <lastmod>2026-11-02T18:24:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/basic-negative-numbers-escape-room-challenge-by-lew-w-s/sssssj3w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-negative-numbers-escape-room-challenge-by-lew-w-s/sssssj3w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-negative-numbers-escape-room-challenge-by-lew-w-s/sssssj3w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-negative-numbers-escape-room-challenge-by-lew-w-s/sssssj3w"/>
      <lastmod>2026-11-02T18:24:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-translation-of-polygons-in-geogebra/sssssj36</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-translation-of-polygons-in-geogebra/sssssj36"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-translation-of-polygons-in-geogebra/sssssj36"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-translation-of-polygons-in-geogebra/sssssj36"/>
      <lastmod>2026-11-02T00:12:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-translation-of-polygons-in-geogebra/sssssj36</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-translation-of-polygons-in-geogebra/sssssj36"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-translation-of-polygons-in-geogebra/sssssj36"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-translation-of-polygons-in-geogebra/sssssj36"/>
      <lastmod>2026-11-02T00:12:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-the-normal-distribution-pdf-and-cdf/sssssj3g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-normal-distribution-pdf-and-cdf/sssssj3g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-normal-distribution-pdf-and-cdf/sssssj3g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-normal-distribution-pdf-and-cdf/sssssj3g"/>
      <lastmod>2026-11-01T21:13:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-the-normal-distribution-pdf-and-cdf/sssssj3g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-normal-distribution-pdf-and-cdf/sssssj3g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-normal-distribution-pdf-and-cdf/sssssj3g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-normal-distribution-pdf-and-cdf/sssssj3g"/>
      <lastmod>2026-11-01T21:13:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spiraling-quads/sssssj39</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiraling-quads/sssssj39"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiraling-quads/sssssj39"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiraling-quads/sssssj39"/>
      <lastmod>2026-11-01T23:46:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spiraling-quads/sssssj39</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiraling-quads/sssssj39"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiraling-quads/sssssj39"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiraling-quads/sssssj39"/>
      <lastmod>2026-11-01T23:46:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-demonstration-of-additive-property-of-definite-integral/sssssj3e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-demonstration-of-additive-property-of-definite-integral/sssssj3e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-demonstration-of-additive-property-of-definite-integral/sssssj3e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-demonstration-of-additive-property-of-definite-integral/sssssj3e"/>
      <lastmod>2026-11-02T03:10:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-demonstration-of-additive-property-of-definite-integral/sssssj3e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-demonstration-of-additive-property-of-definite-integral/sssssj3e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-demonstration-of-additive-property-of-definite-integral/sssssj3e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-demonstration-of-additive-property-of-definite-integral/sssssj3e"/>
      <lastmod>2026-11-02T03:10:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-linear-equations-graphically-symbolically/sssssj3v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-equations-graphically-symbolically/sssssj3v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-equations-graphically-symbolically/sssssj3v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-equations-graphically-symbolically/sssssj3v"/>
      <lastmod>2026-11-02T00:22:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-linear-equations-graphically-symbolically/sssssj3v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-equations-graphically-symbolically/sssssj3v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-equations-graphically-symbolically/sssssj3v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-equations-graphically-symbolically/sssssj3v"/>
      <lastmod>2026-11-02T00:22:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-hexagonal-prism-by-s-sharma/sssssj34</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-hexagonal-prism-by-s-sharma/sssssj34"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-hexagonal-prism-by-s-sharma/sssssj34"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-hexagonal-prism-by-s-sharma/sssssj34"/>
      <lastmod>2026-11-01T22:05:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-hexagonal-prism-by-s-sharma/sssssj34</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-hexagonal-prism-by-s-sharma/sssssj34"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-hexagonal-prism-by-s-sharma/sssssj34"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-hexagonal-prism-by-s-sharma/sssssj34"/>
      <lastmod>2026-11-01T22:05:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solar-panel-collecting-sunlight-during-day/sssssj3l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solar-panel-collecting-sunlight-during-day/sssssj3l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solar-panel-collecting-sunlight-during-day/sssssj3l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solar-panel-collecting-sunlight-during-day/sssssj3l"/>
      <lastmod>2026-11-02T13:36:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solar-panel-collecting-sunlight-during-day/sssssj3l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solar-panel-collecting-sunlight-during-day/sssssj3l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solar-panel-collecting-sunlight-during-day/sssssj3l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solar-panel-collecting-sunlight-during-day/sssssj3l"/>
      <lastmod>2026-11-02T13:36:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-probability-calculation-by-geogebra-team/sssssj3y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-probability-calculation-by-geogebra-team/sssssj3y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-probability-calculation-by-geogebra-team/sssssj3y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-probability-calculation-by-geogebra-team/sssssj3y"/>
      <lastmod>2026-11-01T21:51:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-probability-calculation-by-geogebra-team/sssssj3y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-probability-calculation-by-geogebra-team/sssssj3y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-probability-calculation-by-geogebra-team/sssssj3y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-probability-calculation-by-geogebra-team/sssssj3y"/>
      <lastmod>2026-11-01T21:51:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-boxplot-v2-0/sssssj3a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-boxplot-v2-0/sssssj3a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-boxplot-v2-0/sssssj3a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-boxplot-v2-0/sssssj3a"/>
      <lastmod>2026-11-01T23:46:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-boxplot-v2-0/sssssj3a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-boxplot-v2-0/sssssj3a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-boxplot-v2-0/sssssj3a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-boxplot-v2-0/sssssj3a"/>
      <lastmod>2026-11-01T23:46:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solvemymaths-action-1-dynamic-area-vector-geometry/sssssj3c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solvemymaths-action-1-dynamic-area-vector-geometry/sssssj3c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solvemymaths-action-1-dynamic-area-vector-geometry/sssssj3c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solvemymaths-action-1-dynamic-area-vector-geometry/sssssj3c"/>
      <lastmod>2026-11-02T18:41:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solvemymaths-action-1-dynamic-area-vector-geometry/sssssj3c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solvemymaths-action-1-dynamic-area-vector-geometry/sssssj3c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solvemymaths-action-1-dynamic-area-vector-geometry/sssssj3c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solvemymaths-action-1-dynamic-area-vector-geometry/sssssj3c"/>
      <lastmod>2026-11-02T18:41:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/standard-form-linear-functions-practice/sssssj3r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-form-linear-functions-practice/sssssj3r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-form-linear-functions-practice/sssssj3r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-form-linear-functions-practice/sssssj3r"/>
      <lastmod>2026-11-01T20:52:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/standard-form-linear-functions-practice/sssssj3r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-form-linear-functions-practice/sssssj3r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-form-linear-functions-practice/sssssj3r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-form-linear-functions-practice/sssssj3r"/>
      <lastmod>2026-11-01T20:52:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-inequalities-in-slope-intercept-fractions-for-slope/sssssj3h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-inequalities-in-slope-intercept-fractions-for-slope/sssssj3h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-inequalities-in-slope-intercept-fractions-for-slope/sssssj3h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-inequalities-in-slope-intercept-fractions-for-slope/sssssj3h"/>
      <lastmod>2026-11-02T18:44:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-inequalities-in-slope-intercept-fractions-for-slope/sssssj3h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-inequalities-in-slope-intercept-fractions-for-slope/sssssj3h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-inequalities-in-slope-intercept-fractions-for-slope/sssssj3h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-inequalities-in-slope-intercept-fractions-for-slope/sssssj3h"/>
      <lastmod>2026-11-02T18:44:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/variable-perimeter-exploration-dynamic-triangles-and-quadrilaterals/sssssj3t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/variable-perimeter-exploration-dynamic-triangles-and-quadrilaterals/sssssj3t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/variable-perimeter-exploration-dynamic-triangles-and-quadrilaterals/sssssj3t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/variable-perimeter-exploration-dynamic-triangles-and-quadrilaterals/sssssj3t"/>
      <lastmod>2026-11-02T18:46:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/variable-perimeter-exploration-dynamic-triangles-and-quadrilaterals/sssssj3t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/variable-perimeter-exploration-dynamic-triangles-and-quadrilaterals/sssssj3t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/variable-perimeter-exploration-dynamic-triangles-and-quadrilaterals/sssssj3t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/variable-perimeter-exploration-dynamic-triangles-and-quadrilaterals/sssssj3t"/>
      <lastmod>2026-11-02T18:46:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-coordinates-example-2/sssssj3x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-coordinates-example-2/sssssj3x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-coordinates-example-2/sssssj3x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-coordinates-example-2/sssssj3x"/>
      <lastmod>2026-11-02T17:08:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-coordinates-example-2/sssssj3x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-coordinates-example-2/sssssj3x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-coordinates-example-2/sssssj3x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-coordinates-example-2/sssssj3x"/>
      <lastmod>2026-11-02T17:08:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-root-of-3-construction/sssssj3i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-of-3-construction/sssssj3i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-of-3-construction/sssssj3i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-of-3-construction/sssssj3i"/>
      <lastmod>2026-11-02T08:51:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-root-of-3-construction/sssssj3i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-of-3-construction/sssssj3i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-of-3-construction/sssssj3i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-of-3-construction/sssssj3i"/>
      <lastmod>2026-11-02T08:51:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coronavirus-growth-curve/sssssj3o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coronavirus-growth-curve/sssssj3o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coronavirus-growth-curve/sssssj3o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coronavirus-growth-curve/sssssj3o"/>
      <lastmod>2026-11-01T19:07:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coronavirus-growth-curve/sssssj3o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coronavirus-growth-curve/sssssj3o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coronavirus-growth-curve/sssssj3o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coronavirus-growth-curve/sssssj3o"/>
      <lastmod>2026-11-01T19:07:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/octahedron-and-dodecahedron/sssssjqs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/octahedron-and-dodecahedron/sssssjqs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/octahedron-and-dodecahedron/sssssjqs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/octahedron-and-dodecahedron/sssssjqs"/>
      <lastmod>2026-11-02T11:52:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/octahedron-and-dodecahedron/sssssjqs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/octahedron-and-dodecahedron/sssssjqs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/octahedron-and-dodecahedron/sssssjqs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/octahedron-and-dodecahedron/sssssjqs"/>
      <lastmod>2026-11-02T11:52:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drawing-transformed-images/sssssjq7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-transformed-images/sssssjq7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-transformed-images/sssssjq7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-transformed-images/sssssjq7"/>
      <lastmod>2026-11-01T20:42:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drawing-transformed-images/sssssjq7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-transformed-images/sssssjq7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-transformed-images/sssssjq7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-transformed-images/sssssjq7"/>
      <lastmod>2026-11-01T20:42:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/identifying-quadrilaterals/sssssjqn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identifying-quadrilaterals/sssssjqn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identifying-quadrilaterals/sssssjqn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identifying-quadrilaterals/sssssjqn"/>
      <lastmod>2026-11-02T16:57:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/identifying-quadrilaterals/sssssjqn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identifying-quadrilaterals/sssssjqn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identifying-quadrilaterals/sssssjqn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identifying-quadrilaterals/sssssjqn"/>
      <lastmod>2026-11-02T16:57:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-relationship-of-triangle-and-parallelogram-on-the-same-base-and-between-sam/sssssjq2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-relationship-of-triangle-and-parallelogram-on-the-same-base-and-between-sam/sssssjq2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-relationship-of-triangle-and-parallelogram-on-the-same-base-and-between-sam/sssssjq2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-relationship-of-triangle-and-parallelogram-on-the-same-base-and-between-sam/sssssjq2"/>
      <lastmod>2026-11-01T23:17:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-relationship-of-triangle-and-parallelogram-on-the-same-base-and-between-sam/sssssjq2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-relationship-of-triangle-and-parallelogram-on-the-same-base-and-between-sam/sssssjq2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-relationship-of-triangle-and-parallelogram-on-the-same-base-and-between-sam/sssssjq2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-relationship-of-triangle-and-parallelogram-on-the-same-base-and-between-sam/sssssjq2"/>
      <lastmod>2026-11-01T23:17:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthoptic-of-a-closed-fermat-curve/sssssjqk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthoptic-of-a-closed-fermat-curve/sssssjqk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthoptic-of-a-closed-fermat-curve/sssssjqk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthoptic-of-a-closed-fermat-curve/sssssjqk"/>
      <lastmod>2026-11-01T21:26:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthoptic-of-a-closed-fermat-curve/sssssjqk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthoptic-of-a-closed-fermat-curve/sssssjqk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthoptic-of-a-closed-fermat-curve/sssssjqk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthoptic-of-a-closed-fermat-curve/sssssjqk"/>
      <lastmod>2026-11-01T21:26:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coin-rotation-paradox/sssssjqz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coin-rotation-paradox/sssssjqz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coin-rotation-paradox/sssssjqz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coin-rotation-paradox/sssssjqz"/>
      <lastmod>2026-11-01T20:39:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coin-rotation-paradox/sssssjqz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coin-rotation-paradox/sssssjqz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coin-rotation-paradox/sssssjqz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coin-rotation-paradox/sssssjqz"/>
      <lastmod>2026-11-01T20:39:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-in-sphere-octahedron/sssssjq0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-in-sphere-octahedron/sssssjq0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-in-sphere-octahedron/sssssjq0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-in-sphere-octahedron/sssssjq0"/>
      <lastmod>2026-11-02T17:36:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-in-sphere-octahedron/sssssjq0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-in-sphere-octahedron/sssssjq0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-in-sphere-octahedron/sssssjq0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-in-sphere-octahedron/sssssjq0"/>
      <lastmod>2026-11-02T17:36:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/space-lines-planes-vector-forms/sssssjqd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/space-lines-planes-vector-forms/sssssjqd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/space-lines-planes-vector-forms/sssssjqd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/space-lines-planes-vector-forms/sssssjqd"/>
      <lastmod>2026-11-01T23:43:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/space-lines-planes-vector-forms/sssssjqd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/space-lines-planes-vector-forms/sssssjqd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/space-lines-planes-vector-forms/sssssjqd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/space-lines-planes-vector-forms/sssssjqd"/>
      <lastmod>2026-11-01T23:43:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/special-angles-in-standard-position-dynamic-templates-v2-part-2/sssssjqf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-angles-in-standard-position-dynamic-templates-v2-part-2/sssssjqf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-angles-in-standard-position-dynamic-templates-v2-part-2/sssssjqf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-angles-in-standard-position-dynamic-templates-v2-part-2/sssssjqf"/>
      <lastmod>2026-11-02T18:46:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/special-angles-in-standard-position-dynamic-templates-v2-part-2/sssssjqf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-angles-in-standard-position-dynamic-templates-v2-part-2/sssssjqf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-angles-in-standard-position-dynamic-templates-v2-part-2/sssssjqf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-angles-in-standard-position-dynamic-templates-v2-part-2/sssssjqf"/>
      <lastmod>2026-11-02T18:46:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-calculation-with-square-cross-section/sssssjq8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-calculation-with-square-cross-section/sssssjq8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-calculation-with-square-cross-section/sssssjq8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-calculation-with-square-cross-section/sssssjq8"/>
      <lastmod>2026-11-02T12:49:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-calculation-with-square-cross-section/sssssjq8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-calculation-with-square-cross-section/sssssjq8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-calculation-with-square-cross-section/sssssjq8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-calculation-with-square-cross-section/sssssjq8"/>
      <lastmod>2026-11-02T12:49:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/convert-fractions-to-decimals/sssssjqu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/convert-fractions-to-decimals/sssssjqu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/convert-fractions-to-decimals/sssssjqu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/convert-fractions-to-decimals/sssssjqu"/>
      <lastmod>2026-11-02T18:52:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/convert-fractions-to-decimals/sssssjqu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/convert-fractions-to-decimals/sssssjqu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/convert-fractions-to-decimals/sssssjqu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/convert-fractions-to-decimals/sssssjqu"/>
      <lastmod>2026-11-02T18:52:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-p-value-for-proportion/sssssjq5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-p-value-for-proportion/sssssjq5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-p-value-for-proportion/sssssjq5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-p-value-for-proportion/sssssjq5"/>
      <lastmod>2026-11-01T19:14:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-p-value-for-proportion/sssssjq5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-p-value-for-proportion/sssssjq5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-p-value-for-proportion/sssssjq5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-p-value-for-proportion/sssssjq5"/>
      <lastmod>2026-11-01T19:14:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-tailed-f-test/sssssjqb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-tailed-f-test/sssssjqb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-tailed-f-test/sssssjqb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-tailed-f-test/sssssjqb"/>
      <lastmod>2026-11-02T09:26:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-tailed-f-test/sssssjqb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-tailed-f-test/sssssjqb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-tailed-f-test/sssssjqb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-tailed-f-test/sssssjqb"/>
      <lastmod>2026-11-02T09:26:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lines-planes-and-points-interaction-demo/sssssjq3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lines-planes-and-points-interaction-demo/sssssjq3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lines-planes-and-points-interaction-demo/sssssjq3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lines-planes-and-points-interaction-demo/sssssjq3"/>
      <lastmod>2026-11-02T16:55:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lines-planes-and-points-interaction-demo/sssssjq3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lines-planes-and-points-interaction-demo/sssssjq3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lines-planes-and-points-interaction-demo/sssssjq3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lines-planes-and-points-interaction-demo/sssssjq3"/>
      <lastmod>2026-11-02T16:55:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sliding-block-puzzle/sssssjqq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sliding-block-puzzle/sssssjqq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sliding-block-puzzle/sssssjqq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sliding-block-puzzle/sssssjqq"/>
      <lastmod>2026-11-02T08:34:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sliding-block-puzzle/sssssjqq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sliding-block-puzzle/sssssjqq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sliding-block-puzzle/sssssjqq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sliding-block-puzzle/sssssjqq"/>
      <lastmod>2026-11-02T08:34:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-construction-by-brianne-becker/sssssjq1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-brianne-becker/sssssjq1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-by-brianne-becker/sssssjq1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-brianne-becker/sssssjq1"/>
      <lastmod>2026-11-02T17:57:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-construction-by-brianne-becker/sssssjq1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-brianne-becker/sssssjq1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-by-brianne-becker/sssssjq1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-brianne-becker/sssssjq1"/>
      <lastmod>2026-11-02T17:57:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sas-congruence-theorem-triangle-congruence-transformation-demo/sssssjqm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sas-congruence-theorem-triangle-congruence-transformation-demo/sssssjqm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sas-congruence-theorem-triangle-congruence-transformation-demo/sssssjqm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sas-congruence-theorem-triangle-congruence-transformation-demo/sssssjqm"/>
      <lastmod>2026-11-01T21:34:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sas-congruence-theorem-triangle-congruence-transformation-demo/sssssjqm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sas-congruence-theorem-triangle-congruence-transformation-demo/sssssjqm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sas-congruence-theorem-triangle-congruence-transformation-demo/sssssjqm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sas-congruence-theorem-triangle-congruence-transformation-demo/sssssjqm"/>
      <lastmod>2026-11-01T21:34:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wave-superposition-by-andreas-lindner/sssssjqj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wave-superposition-by-andreas-lindner/sssssjqj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wave-superposition-by-andreas-lindner/sssssjqj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wave-superposition-by-andreas-lindner/sssssjqj"/>
      <lastmod>2026-11-02T11:03:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wave-superposition-by-andreas-lindner/sssssjqj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wave-superposition-by-andreas-lindner/sssssjqj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wave-superposition-by-andreas-lindner/sssssjqj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wave-superposition-by-andreas-lindner/sssssjqj"/>
      <lastmod>2026-11-02T11:03:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-equal-sides-with-a-non-included-equal-angle/sssssjqp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-equal-sides-with-a-non-included-equal-angle/sssssjqp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-equal-sides-with-a-non-included-equal-angle/sssssjqp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-equal-sides-with-a-non-included-equal-angle/sssssjqp"/>
      <lastmod>2026-11-02T08:53:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-equal-sides-with-a-non-included-equal-angle/sssssjqp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-equal-sides-with-a-non-included-equal-angle/sssssjqp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-equal-sides-with-a-non-included-equal-angle/sssssjqp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-equal-sides-with-a-non-included-equal-angle/sssssjqp"/>
      <lastmod>2026-11-02T08:53:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-mean-and-median-in-a-dotplot/sssssjqw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-mean-and-median-in-a-dotplot/sssssjqw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-mean-and-median-in-a-dotplot/sssssjqw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-mean-and-median-in-a-dotplot/sssssjqw"/>
      <lastmod>2026-11-01T19:03:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-mean-and-median-in-a-dotplot/sssssjqw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-mean-and-median-in-a-dotplot/sssssjqw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-mean-and-median-in-a-dotplot/sssssjqw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-mean-and-median-in-a-dotplot/sssssjqw"/>
      <lastmod>2026-11-01T19:03:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inscribed-angle-theorem/sssssjq6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inscribed-angle-theorem/sssssjq6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inscribed-angle-theorem/sssssjq6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inscribed-angle-theorem/sssssjq6"/>
      <lastmod>2026-11-01T21:32:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inscribed-angle-theorem/sssssjq6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inscribed-angle-theorem/sssssjq6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inscribed-angle-theorem/sssssjq6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inscribed-angle-theorem/sssssjq6"/>
      <lastmod>2026-11-01T21:32:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-with-contours/sssssjqg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-with-contours/sssssjqg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-with-contours/sssssjqg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-with-contours/sssssjqg"/>
      <lastmod>2026-11-01T23:49:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-with-contours/sssssjqg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-with-contours/sssssjqg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-with-contours/sssssjqg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-with-contours/sssssjqg"/>
      <lastmod>2026-11-01T23:49:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-parallelogram-problem/sssssjq9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-parallelogram-problem/sssssjq9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-parallelogram-problem/sssssjq9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-parallelogram-problem/sssssjq9"/>
      <lastmod>2026-11-02T16:56:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-parallelogram-problem/sssssjq9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-parallelogram-problem/sssssjq9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-parallelogram-problem/sssssjq9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-parallelogram-problem/sssssjq9"/>
      <lastmod>2026-11-02T16:56:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-coordinates-by-hatchtag-resources/sssssjqe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-coordinates-by-hatchtag-resources/sssssjqe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-coordinates-by-hatchtag-resources/sssssjqe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-coordinates-by-hatchtag-resources/sssssjqe"/>
      <lastmod>2026-11-02T00:46:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-coordinates-by-hatchtag-resources/sssssjqe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-coordinates-by-hatchtag-resources/sssssjqe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-coordinates-by-hatchtag-resources/sssssjqe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-coordinates-by-hatchtag-resources/sssssjqe"/>
      <lastmod>2026-11-02T00:46:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthopole-wallace-simpson-line-and-deltoid/sssssjqv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthopole-wallace-simpson-line-and-deltoid/sssssjqv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthopole-wallace-simpson-line-and-deltoid/sssssjqv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthopole-wallace-simpson-line-and-deltoid/sssssjqv"/>
      <lastmod>2026-11-02T17:02:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthopole-wallace-simpson-line-and-deltoid/sssssjqv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthopole-wallace-simpson-line-and-deltoid/sssssjqv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthopole-wallace-simpson-line-and-deltoid/sssssjqv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthopole-wallace-simpson-line-and-deltoid/sssssjqv"/>
      <lastmod>2026-11-02T17:02:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-shapes-using-polynomials-basic/sssssjq4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-shapes-using-polynomials-basic/sssssjq4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-shapes-using-polynomials-basic/sssssjq4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-shapes-using-polynomials-basic/sssssjq4"/>
      <lastmod>2026-11-02T09:45:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-shapes-using-polynomials-basic/sssssjq4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-shapes-using-polynomials-basic/sssssjq4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-shapes-using-polynomials-basic/sssssjq4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-shapes-using-polynomials-basic/sssssjq4"/>
      <lastmod>2026-11-02T09:45:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pl-cker-s-conoid-views/sssssjql</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pl-cker-s-conoid-views/sssssjql"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pl-cker-s-conoid-views/sssssjql"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pl-cker-s-conoid-views/sssssjql"/>
      <lastmod>2026-11-01T19:24:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pl-cker-s-conoid-views/sssssjql</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pl-cker-s-conoid-views/sssssjql"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pl-cker-s-conoid-views/sssssjql"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pl-cker-s-conoid-views/sssssjql"/>
      <lastmod>2026-11-01T19:24:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spherical-coordinates-demo-by-esteban-diaz-uta/sssssjqy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-coordinates-demo-by-esteban-diaz-uta/sssssjqy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-coordinates-demo-by-esteban-diaz-uta/sssssjqy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-coordinates-demo-by-esteban-diaz-uta/sssssjqy"/>
      <lastmod>2026-11-02T18:31:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spherical-coordinates-demo-by-esteban-diaz-uta/sssssjqy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-coordinates-demo-by-esteban-diaz-uta/sssssjqy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-coordinates-demo-by-esteban-diaz-uta/sssssjqy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-coordinates-demo-by-esteban-diaz-uta/sssssjqy"/>
      <lastmod>2026-11-02T18:31:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a-b-2-geometric-demonstration/sssssjqa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-b-2-geometric-demonstration/sssssjqa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-b-2-geometric-demonstration/sssssjqa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-b-2-geometric-demonstration/sssssjqa"/>
      <lastmod>2026-11-01T19:28:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a-b-2-geometric-demonstration/sssssjqa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-b-2-geometric-demonstration/sssssjqa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-b-2-geometric-demonstration/sssssjqa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-b-2-geometric-demonstration/sssssjqa"/>
      <lastmod>2026-11-01T19:28:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/applications-of-hyperbola-in-the-real-world/sssssjqc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/applications-of-hyperbola-in-the-real-world/sssssjqc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/applications-of-hyperbola-in-the-real-world/sssssjqc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/applications-of-hyperbola-in-the-real-world/sssssjqc"/>
      <lastmod>2026-11-01T20:49:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/applications-of-hyperbola-in-the-real-world/sssssjqc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/applications-of-hyperbola-in-the-real-world/sssssjqc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/applications-of-hyperbola-in-the-real-world/sssssjqc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/applications-of-hyperbola-in-the-real-world/sssssjqc"/>
      <lastmod>2026-11-01T20:49:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practice-with-other-bases/sssssjqr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-with-other-bases/sssssjqr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-with-other-bases/sssssjqr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-with-other-bases/sssssjqr"/>
      <lastmod>2026-11-02T10:36:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practice-with-other-bases/sssssjqr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-with-other-bases/sssssjqr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-with-other-bases/sssssjqr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-with-other-bases/sssssjqr"/>
      <lastmod>2026-11-02T10:36:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-quadratic-equations-graphically-symbolically/sssssjqh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-graphically-symbolically/sssssjqh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-quadratic-equations-graphically-symbolically/sssssjqh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-graphically-symbolically/sssssjqh"/>
      <lastmod>2026-11-02T18:25:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-quadratic-equations-graphically-symbolically/sssssjqh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-graphically-symbolically/sssssjqh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-quadratic-equations-graphically-symbolically/sssssjqh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations-graphically-symbolically/sssssjqh"/>
      <lastmod>2026-11-02T18:25:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-parallel-and-perpendicular-lines-by-tim-brzezinski/sssssjqt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-parallel-and-perpendicular-lines-by-tim-brzezinski/sssssjqt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-parallel-and-perpendicular-lines-by-tim-brzezinski/sssssjqt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-parallel-and-perpendicular-lines-by-tim-brzezinski/sssssjqt"/>
      <lastmod>2026-11-02T13:51:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-parallel-and-perpendicular-lines-by-tim-brzezinski/sssssjqt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-parallel-and-perpendicular-lines-by-tim-brzezinski/sssssjqt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-parallel-and-perpendicular-lines-by-tim-brzezinski/sssssjqt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-parallel-and-perpendicular-lines-by-tim-brzezinski/sssssjqt"/>
      <lastmod>2026-11-02T13:51:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-constructions-random-experiments-demo/sssssjqx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-constructions-random-experiments-demo/sssssjqx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-constructions-random-experiments-demo/sssssjqx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-constructions-random-experiments-demo/sssssjqx"/>
      <lastmod>2026-11-02T17:51:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-constructions-random-experiments-demo/sssssjqx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-constructions-random-experiments-demo/sssssjqx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-constructions-random-experiments-demo/sssssjqx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-constructions-random-experiments-demo/sssssjqx"/>
      <lastmod>2026-11-02T17:51:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-sine-by-john-golden/sssssjqi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-sine-by-john-golden/sssssjqi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-sine-by-john-golden/sssssjqi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-sine-by-john-golden/sssssjqi"/>
      <lastmod>2026-11-02T17:06:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-of-sine-by-john-golden/sssssjqi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-sine-by-john-golden/sssssjqi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-sine-by-john-golden/sssssjqi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-sine-by-john-golden/sssssjqi"/>
      <lastmod>2026-11-02T17:06:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/histogram-normal-distribution/sssssjqo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-normal-distribution/sssssjqo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-normal-distribution/sssssjqo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-normal-distribution/sssssjqo"/>
      <lastmod>2026-11-02T18:48:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/histogram-normal-distribution/sssssjqo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-normal-distribution/sssssjqo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-normal-distribution/sssssjqo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-normal-distribution/sssssjqo"/>
      <lastmod>2026-11-02T18:48:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/investigation-of-rotations-with-coordinates/sssssj1s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigation-of-rotations-with-coordinates/sssssj1s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigation-of-rotations-with-coordinates/sssssj1s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigation-of-rotations-with-coordinates/sssssj1s"/>
      <lastmod>2026-11-02T15:48:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/investigation-of-rotations-with-coordinates/sssssj1s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigation-of-rotations-with-coordinates/sssssj1s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigation-of-rotations-with-coordinates/sssssj1s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigation-of-rotations-with-coordinates/sssssj1s"/>
      <lastmod>2026-11-02T15:48:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-construction-by-blakemasson/sssssj17</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-construction-by-blakemasson/sssssj17"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-construction-by-blakemasson/sssssj17"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-construction-by-blakemasson/sssssj17"/>
      <lastmod>2026-11-02T18:20:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-construction-by-blakemasson/sssssj17</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-construction-by-blakemasson/sssssj17"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-construction-by-blakemasson/sssssj17"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-construction-by-blakemasson/sssssj17"/>
      <lastmod>2026-11-02T18:20:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quiz-on-finding-unknowns-in-similar-rectangles/sssssj1n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-on-finding-unknowns-in-similar-rectangles/sssssj1n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-on-finding-unknowns-in-similar-rectangles/sssssj1n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-on-finding-unknowns-in-similar-rectangles/sssssj1n"/>
      <lastmod>2026-11-01T21:53:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quiz-on-finding-unknowns-in-similar-rectangles/sssssj1n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-on-finding-unknowns-in-similar-rectangles/sssssj1n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-on-finding-unknowns-in-similar-rectangles/sssssj1n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-on-finding-unknowns-in-similar-rectangles/sssssj1n"/>
      <lastmod>2026-11-01T21:53:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-graphing-and-numerical-analysis/sssssj12</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-graphing-and-numerical-analysis/sssssj12"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-graphing-and-numerical-analysis/sssssj12"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-graphing-and-numerical-analysis/sssssj12"/>
      <lastmod>2026-11-02T18:12:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-graphing-and-numerical-analysis/sssssj12</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-graphing-and-numerical-analysis/sssssj12"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-graphing-and-numerical-analysis/sssssj12"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-graphing-and-numerical-analysis/sssssj12"/>
      <lastmod>2026-11-02T18:12:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a4-to-a0-dimension-change/sssssj1k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a4-to-a0-dimension-change/sssssj1k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a4-to-a0-dimension-change/sssssj1k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a4-to-a0-dimension-change/sssssj1k"/>
      <lastmod>2026-11-02T17:49:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a4-to-a0-dimension-change/sssssj1k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a4-to-a0-dimension-change/sssssj1k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a4-to-a0-dimension-change/sssssj1k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a4-to-a0-dimension-change/sssssj1k"/>
      <lastmod>2026-11-02T17:49:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotate-quadrilateral/sssssj1z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotate-quadrilateral/sssssj1z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotate-quadrilateral/sssssj1z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotate-quadrilateral/sssssj1z"/>
      <lastmod>2026-11-02T00:53:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotate-quadrilateral/sssssj1z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotate-quadrilateral/sssssj1z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotate-quadrilateral/sssssj1z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotate-quadrilateral/sssssj1z"/>
      <lastmod>2026-11-02T00:53:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/connecting-box-plots-to-frequency-plots/sssssj10</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connecting-box-plots-to-frequency-plots/sssssj10"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connecting-box-plots-to-frequency-plots/sssssj10"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connecting-box-plots-to-frequency-plots/sssssj10"/>
      <lastmod>2026-11-01T23:57:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/connecting-box-plots-to-frequency-plots/sssssj10</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connecting-box-plots-to-frequency-plots/sssssj10"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connecting-box-plots-to-frequency-plots/sssssj10"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connecting-box-plots-to-frequency-plots/sssssj10"/>
      <lastmod>2026-11-01T23:57:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rainbow-proof/sssssj1d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rainbow-proof/sssssj1d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rainbow-proof/sssssj1d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rainbow-proof/sssssj1d"/>
      <lastmod>2026-11-01T19:14:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rainbow-proof/sssssj1d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rainbow-proof/sssssj1d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rainbow-proof/sssssj1d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rainbow-proof/sssssj1d"/>
      <lastmod>2026-11-01T19:14:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quiz-adding-integers-interactive-practice-with-random-vectors/sssssj1f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-adding-integers-interactive-practice-with-random-vectors/sssssj1f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-adding-integers-interactive-practice-with-random-vectors/sssssj1f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-adding-integers-interactive-practice-with-random-vectors/sssssj1f"/>
      <lastmod>2026-11-02T00:10:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quiz-adding-integers-interactive-practice-with-random-vectors/sssssj1f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-adding-integers-interactive-practice-with-random-vectors/sssssj1f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-adding-integers-interactive-practice-with-random-vectors/sssssj1f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-adding-integers-interactive-practice-with-random-vectors/sssssj1f"/>
      <lastmod>2026-11-02T00:10:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/subtraction-of-algebraic-expressions-interactive-practice/sssssj18</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtraction-of-algebraic-expressions-interactive-practice/sssssj18"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtraction-of-algebraic-expressions-interactive-practice/sssssj18"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtraction-of-algebraic-expressions-interactive-practice/sssssj18"/>
      <lastmod>2026-11-01T19:01:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/subtraction-of-algebraic-expressions-interactive-practice/sssssj18</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtraction-of-algebraic-expressions-interactive-practice/sssssj18"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtraction-of-algebraic-expressions-interactive-practice/sssssj18"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtraction-of-algebraic-expressions-interactive-practice/sssssj18"/>
      <lastmod>2026-11-01T19:01:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adobe-logo-geometric-construction/sssssj1u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adobe-logo-geometric-construction/sssssj1u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adobe-logo-geometric-construction/sssssj1u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adobe-logo-geometric-construction/sssssj1u"/>
      <lastmod>2026-11-02T17:36:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adobe-logo-geometric-construction/sssssj1u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adobe-logo-geometric-construction/sssssj1u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adobe-logo-geometric-construction/sssssj1u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adobe-logo-geometric-construction/sssssj1u"/>
      <lastmod>2026-11-02T17:36:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-construction-3-vector-driven-geometric-transformation/sssssj15</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-construction-3-vector-driven-geometric-transformation/sssssj15"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-construction-3-vector-driven-geometric-transformation/sssssj15"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-construction-3-vector-driven-geometric-transformation/sssssj15"/>
      <lastmod>2026-11-02T02:46:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-construction-3-vector-driven-geometric-transformation/sssssj15</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-construction-3-vector-driven-geometric-transformation/sssssj15"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-construction-3-vector-driven-geometric-transformation/sssssj15"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-construction-3-vector-driven-geometric-transformation/sssssj15"/>
      <lastmod>2026-11-02T02:46:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-demonstration-of-rhombus-and-parabola/sssssj1b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-rhombus-and-parabola/sssssj1b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-rhombus-and-parabola/sssssj1b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-rhombus-and-parabola/sssssj1b"/>
      <lastmod>2026-11-02T18:18:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-demonstration-of-rhombus-and-parabola/sssssj1b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-rhombus-and-parabola/sssssj1b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-rhombus-and-parabola/sssssj1b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-rhombus-and-parabola/sssssj1b"/>
      <lastmod>2026-11-02T18:18:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/truncated-icosahedron-by-guillermo-bautista/sssssj13</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-icosahedron-by-guillermo-bautista/sssssj13"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-icosahedron-by-guillermo-bautista/sssssj13"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-icosahedron-by-guillermo-bautista/sssssj13"/>
      <lastmod>2026-11-01T21:08:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/truncated-icosahedron-by-guillermo-bautista/sssssj13</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-icosahedron-by-guillermo-bautista/sssssj13"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-icosahedron-by-guillermo-bautista/sssssj13"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-icosahedron-by-guillermo-bautista/sssssj13"/>
      <lastmod>2026-11-01T21:08:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-angled-triangle-in-a-circle/sssssj1q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-angled-triangle-in-a-circle/sssssj1q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-angled-triangle-in-a-circle/sssssj1q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-angled-triangle-in-a-circle/sssssj1q"/>
      <lastmod>2026-11-01T21:53:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-angled-triangle-in-a-circle/sssssj1q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-angled-triangle-in-a-circle/sssssj1q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-angled-triangle-in-a-circle/sssssj1q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-angled-triangle-in-a-circle/sssssj1q"/>
      <lastmod>2026-11-01T21:53:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/investigating-the-derivative-of-a-cubic-function/sssssj11</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-the-derivative-of-a-cubic-function/sssssj11"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-the-derivative-of-a-cubic-function/sssssj11"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-the-derivative-of-a-cubic-function/sssssj11"/>
      <lastmod>2026-11-02T13:49:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/investigating-the-derivative-of-a-cubic-function/sssssj11</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-the-derivative-of-a-cubic-function/sssssj11"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-the-derivative-of-a-cubic-function/sssssj11"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-the-derivative-of-a-cubic-function/sssssj11"/>
      <lastmod>2026-11-02T13:49:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-circles-in-a-rectangle-i/sssssj1m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-circles-in-a-rectangle-i/sssssj1m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-circles-in-a-rectangle-i/sssssj1m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-circles-in-a-rectangle-i/sssssj1m"/>
      <lastmod>2026-11-02T18:37:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-circles-in-a-rectangle-i/sssssj1m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-circles-in-a-rectangle-i/sssssj1m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-circles-in-a-rectangle-i/sssssj1m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-circles-in-a-rectangle-i/sssssj1m"/>
      <lastmod>2026-11-02T18:37:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/differential-equations-slope-field-and-euler-s-method/sssssj1j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/differential-equations-slope-field-and-euler-s-method/sssssj1j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/differential-equations-slope-field-and-euler-s-method/sssssj1j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/differential-equations-slope-field-and-euler-s-method/sssssj1j"/>
      <lastmod>2026-11-01T23:26:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/differential-equations-slope-field-and-euler-s-method/sssssj1j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/differential-equations-slope-field-and-euler-s-method/sssssj1j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/differential-equations-slope-field-and-euler-s-method/sssssj1j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/differential-equations-slope-field-and-euler-s-method/sssssj1j"/>
      <lastmod>2026-11-01T23:26:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-pyramid-3d-demo/sssssj1p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-pyramid-3d-demo/sssssj1p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-pyramid-3d-demo/sssssj1p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-pyramid-3d-demo/sssssj1p"/>
      <lastmod>2026-11-02T02:34:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-pyramid-3d-demo/sssssj1p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-pyramid-3d-demo/sssssj1p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-pyramid-3d-demo/sssssj1p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-pyramid-3d-demo/sssssj1p"/>
      <lastmod>2026-11-02T02:34:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dependence-of-average-vertex-distance-in-a-truncated-cube-on-truncation-paramete/sssssj1w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dependence-of-average-vertex-distance-in-a-truncated-cube-on-truncation-paramete/sssssj1w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dependence-of-average-vertex-distance-in-a-truncated-cube-on-truncation-paramete/sssssj1w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dependence-of-average-vertex-distance-in-a-truncated-cube-on-truncation-paramete/sssssj1w"/>
      <lastmod>2026-11-01T19:29:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dependence-of-average-vertex-distance-in-a-truncated-cube-on-truncation-paramete/sssssj1w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dependence-of-average-vertex-distance-in-a-truncated-cube-on-truncation-paramete/sssssj1w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dependence-of-average-vertex-distance-in-a-truncated-cube-on-truncation-paramete/sssssj1w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dependence-of-average-vertex-distance-in-a-truncated-cube-on-truncation-paramete/sssssj1w"/>
      <lastmod>2026-11-01T19:29:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadrilaterals-and-circumcenter/sssssj16</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilaterals-and-circumcenter/sssssj16"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilaterals-and-circumcenter/sssssj16"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilaterals-and-circumcenter/sssssj16"/>
      <lastmod>2026-11-02T18:04:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadrilaterals-and-circumcenter/sssssj16</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilaterals-and-circumcenter/sssssj16"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilaterals-and-circumcenter/sssssj16"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilaterals-and-circumcenter/sssssj16"/>
      <lastmod>2026-11-02T18:04:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cubic-nurbs-by-de-boor-s-method/sssssj1g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubic-nurbs-by-de-boor-s-method/sssssj1g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubic-nurbs-by-de-boor-s-method/sssssj1g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubic-nurbs-by-de-boor-s-method/sssssj1g"/>
      <lastmod>2026-11-01T21:00:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cubic-nurbs-by-de-boor-s-method/sssssj1g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubic-nurbs-by-de-boor-s-method/sssssj1g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubic-nurbs-by-de-boor-s-method/sssssj1g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubic-nurbs-by-de-boor-s-method/sssssj1g"/>
      <lastmod>2026-11-01T21:00:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/puzzle-cube-statistics-visualizing-mean-and-distribution/sssssj19</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/puzzle-cube-statistics-visualizing-mean-and-distribution/sssssj19"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/puzzle-cube-statistics-visualizing-mean-and-distribution/sssssj19"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/puzzle-cube-statistics-visualizing-mean-and-distribution/sssssj19"/>
      <lastmod>2026-11-02T17:57:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/puzzle-cube-statistics-visualizing-mean-and-distribution/sssssj19</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/puzzle-cube-statistics-visualizing-mean-and-distribution/sssssj19"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/puzzle-cube-statistics-visualizing-mean-and-distribution/sssssj19"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/puzzle-cube-statistics-visualizing-mean-and-distribution/sssssj19"/>
      <lastmod>2026-11-02T17:57:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a1-ace-2-relating-slope-and-y-intercept-to-the-real-world/sssssj1e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a1-ace-2-relating-slope-and-y-intercept-to-the-real-world/sssssj1e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a1-ace-2-relating-slope-and-y-intercept-to-the-real-world/sssssj1e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a1-ace-2-relating-slope-and-y-intercept-to-the-real-world/sssssj1e"/>
      <lastmod>2026-11-01T21:39:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a1-ace-2-relating-slope-and-y-intercept-to-the-real-world/sssssj1e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a1-ace-2-relating-slope-and-y-intercept-to-the-real-world/sssssj1e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a1-ace-2-relating-slope-and-y-intercept-to-the-real-world/sssssj1e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a1-ace-2-relating-slope-and-y-intercept-to-the-real-world/sssssj1e"/>
      <lastmod>2026-11-01T21:39:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/measuring-angles-with-protractor/sssssj1v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/measuring-angles-with-protractor/sssssj1v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/measuring-angles-with-protractor/sssssj1v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/measuring-angles-with-protractor/sssssj1v"/>
      <lastmod>2026-11-02T08:41:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/measuring-angles-with-protractor/sssssj1v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/measuring-angles-with-protractor/sssssj1v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/measuring-angles-with-protractor/sssssj1v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/measuring-angles-with-protractor/sssssj1v"/>
      <lastmod>2026-11-02T08:41:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/james-gay-vs-hilton-discrimination-probability-analysis/sssssj14</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/james-gay-vs-hilton-discrimination-probability-analysis/sssssj14"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/james-gay-vs-hilton-discrimination-probability-analysis/sssssj14"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/james-gay-vs-hilton-discrimination-probability-analysis/sssssj14"/>
      <lastmod>2026-11-01T19:10:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/james-gay-vs-hilton-discrimination-probability-analysis/sssssj14</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/james-gay-vs-hilton-discrimination-probability-analysis/sssssj14"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/james-gay-vs-hilton-discrimination-probability-analysis/sssssj14"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/james-gay-vs-hilton-discrimination-probability-analysis/sssssj14"/>
      <lastmod>2026-11-01T19:10:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/butterfly-curve-by-guillermo-bautista/sssssj1l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/butterfly-curve-by-guillermo-bautista/sssssj1l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/butterfly-curve-by-guillermo-bautista/sssssj1l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/butterfly-curve-by-guillermo-bautista/sssssj1l"/>
      <lastmod>2026-11-01T21:04:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/butterfly-curve-by-guillermo-bautista/sssssj1l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/butterfly-curve-by-guillermo-bautista/sssssj1l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/butterfly-curve-by-guillermo-bautista/sssssj1l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/butterfly-curve-by-guillermo-bautista/sssssj1l"/>
      <lastmod>2026-11-01T21:04:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/protractor-and-ruler-construction/sssssj1y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/protractor-and-ruler-construction/sssssj1y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/protractor-and-ruler-construction/sssssj1y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/protractor-and-ruler-construction/sssssj1y"/>
      <lastmod>2026-11-02T12:26:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/protractor-and-ruler-construction/sssssj1y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/protractor-and-ruler-construction/sssssj1y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/protractor-and-ruler-construction/sssssj1y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/protractor-and-ruler-construction/sssssj1y"/>
      <lastmod>2026-11-02T12:26:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-vectors-using-component-method/sssssj1a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-vectors-using-component-method/sssssj1a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-vectors-using-component-method/sssssj1a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-vectors-using-component-method/sssssj1a"/>
      <lastmod>2026-11-02T17:35:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-vectors-using-component-method/sssssj1a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-vectors-using-component-method/sssssj1a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-vectors-using-component-method/sssssj1a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-vectors-using-component-method/sssssj1a"/>
      <lastmod>2026-11-02T17:35:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-coordinate-geometry-construction-and-properties/sssssj1c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-coordinate-geometry-construction-and-properties/sssssj1c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-coordinate-geometry-construction-and-properties/sssssj1c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-coordinate-geometry-construction-and-properties/sssssj1c"/>
      <lastmod>2026-11-01T20:50:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-coordinate-geometry-construction-and-properties/sssssj1c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-coordinate-geometry-construction-and-properties/sssssj1c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-coordinate-geometry-construction-and-properties/sssssj1c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-coordinate-geometry-construction-and-properties/sssssj1c"/>
      <lastmod>2026-11-01T20:50:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sections-of-a-cube-by-dan-dale/sssssj1r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-a-cube-by-dan-dale/sssssj1r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-a-cube-by-dan-dale/sssssj1r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-a-cube-by-dan-dale/sssssj1r"/>
      <lastmod>2026-11-01T23:20:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sections-of-a-cube-by-dan-dale/sssssj1r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-a-cube-by-dan-dale/sssssj1r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-a-cube-by-dan-dale/sssssj1r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-a-cube-by-dan-dale/sssssj1r"/>
      <lastmod>2026-11-01T23:20:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-and-ordering-fractions/sssssj1h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-and-ordering-fractions/sssssj1h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-and-ordering-fractions/sssssj1h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-and-ordering-fractions/sssssj1h"/>
      <lastmod>2026-11-01T21:04:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-and-ordering-fractions/sssssj1h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-and-ordering-fractions/sssssj1h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-and-ordering-fractions/sssssj1h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-and-ordering-fractions/sssssj1h"/>
      <lastmod>2026-11-01T21:04:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-intuitive-introduction/sssssj1t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-intuitive-introduction/sssssj1t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-intuitive-introduction/sssssj1t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-intuitive-introduction/sssssj1t"/>
      <lastmod>2026-11-01T21:00:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-intuitive-introduction/sssssj1t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-intuitive-introduction/sssssj1t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-intuitive-introduction/sssssj1t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-intuitive-introduction/sssssj1t"/>
      <lastmod>2026-11-01T21:00:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-powers-with-non-negative-integer-exponents/sssssj1x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-powers-with-non-negative-integer-exponents/sssssj1x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-powers-with-non-negative-integer-exponents/sssssj1x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-powers-with-non-negative-integer-exponents/sssssj1x"/>
      <lastmod>2026-11-02T17:42:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-powers-with-non-negative-integer-exponents/sssssj1x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-powers-with-non-negative-integer-exponents/sssssj1x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-powers-with-non-negative-integer-exponents/sssssj1x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-powers-with-non-negative-integer-exponents/sssssj1x"/>
      <lastmod>2026-11-02T17:42:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-cone-by-pheebz/sssssj1i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cone-by-pheebz/sssssj1i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cone-by-pheebz/sssssj1i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cone-by-pheebz/sssssj1i"/>
      <lastmod>2026-11-02T18:20:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-cone-by-pheebz/sssssj1i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cone-by-pheebz/sssssj1i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cone-by-pheebz/sssssj1i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cone-by-pheebz/sssssj1i"/>
      <lastmod>2026-11-02T18:20:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-triangle-investigation-construction-prompt-and-exploration-platform/sssssj1o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-triangle-investigation-construction-prompt-and-exploration-platform/sssssj1o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-triangle-investigation-construction-prompt-and-exploration-platform/sssssj1o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-triangle-investigation-construction-prompt-and-exploration-platform/sssssj1o"/>
      <lastmod>2026-11-02T18:02:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-triangle-investigation-construction-prompt-and-exploration-platform/sssssj1o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-triangle-investigation-construction-prompt-and-exploration-platform/sssssj1o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-triangle-investigation-construction-prompt-and-exploration-platform/sssssj1o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-triangle-investigation-construction-prompt-and-exploration-platform/sssssj1o"/>
      <lastmod>2026-11-02T18:02:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/steiner-point-construction-for-six-points/sssssjms</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/steiner-point-construction-for-six-points/sssssjms"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/steiner-point-construction-for-six-points/sssssjms"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/steiner-point-construction-for-six-points/sssssjms"/>
      <lastmod>2026-11-02T03:15:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/steiner-point-construction-for-six-points/sssssjms</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/steiner-point-construction-for-six-points/sssssjms"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/steiner-point-construction-for-six-points/sssssjms"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/steiner-point-construction-for-six-points/sssssjms"/>
      <lastmod>2026-11-02T03:15:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-with-rhombus-and-parametric-curves-a-3d-construction/sssssjm7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-with-rhombus-and-parametric-curves-a-3d-construction/sssssjm7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-with-rhombus-and-parametric-curves-a-3d-construction/sssssjm7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-with-rhombus-and-parametric-curves-a-3d-construction/sssssjm7"/>
      <lastmod>2026-11-02T18:17:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-with-rhombus-and-parametric-curves-a-3d-construction/sssssjm7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-with-rhombus-and-parametric-curves-a-3d-construction/sssssjm7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-with-rhombus-and-parametric-curves-a-3d-construction/sssssjm7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-with-rhombus-and-parametric-curves-a-3d-construction/sssssjm7"/>
      <lastmod>2026-11-02T18:17:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-and-segment-animation-demo/sssssjmn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-segment-animation-demo/sssssjmn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-segment-animation-demo/sssssjmn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-segment-animation-demo/sssssjmn"/>
      <lastmod>2026-11-01T19:16:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-and-segment-animation-demo/sssssjmn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-segment-animation-demo/sssssjmn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-segment-animation-demo/sssssjmn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-segment-animation-demo/sssssjmn"/>
      <lastmod>2026-11-01T19:16:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/9-point-circle-property-midpoint-of-line-segment-from-orthocenter-to-circumcirc/sssssjm2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/9-point-circle-property-midpoint-of-line-segment-from-orthocenter-to-circumcirc/sssssjm2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/9-point-circle-property-midpoint-of-line-segment-from-orthocenter-to-circumcirc/sssssjm2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/9-point-circle-property-midpoint-of-line-segment-from-orthocenter-to-circumcirc/sssssjm2"/>
      <lastmod>2026-11-02T15:52:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/9-point-circle-property-midpoint-of-line-segment-from-orthocenter-to-circumcirc/sssssjm2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/9-point-circle-property-midpoint-of-line-segment-from-orthocenter-to-circumcirc/sssssjm2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/9-point-circle-property-midpoint-of-line-segment-from-orthocenter-to-circumcirc/sssssjm2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/9-point-circle-property-midpoint-of-line-segment-from-orthocenter-to-circumcirc/sssssjm2"/>
      <lastmod>2026-11-02T15:52:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-transformation-demo/sssssjmk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformation-demo/sssssjmk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformation-demo/sssssjmk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformation-demo/sssssjmk"/>
      <lastmod>2026-11-01T21:24:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-transformation-demo/sssssjmk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformation-demo/sssssjmk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformation-demo/sssssjmk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformation-demo/sssssjmk"/>
      <lastmod>2026-11-01T21:24:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polynomial-intersections/sssssjmz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-intersections/sssssjmz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-intersections/sssssjmz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-intersections/sssssjmz"/>
      <lastmod>2026-11-01T22:00:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polynomial-intersections/sssssjmz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-intersections/sssssjmz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-intersections/sssssjmz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-intersections/sssssjmz"/>
      <lastmod>2026-11-01T22:00:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/averages-interactive-practice/sssssjm0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/averages-interactive-practice/sssssjm0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/averages-interactive-practice/sssssjm0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/averages-interactive-practice/sssssjm0"/>
      <lastmod>2026-11-01T23:35:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/averages-interactive-practice/sssssjm0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/averages-interactive-practice/sssssjm0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/averages-interactive-practice/sssssjm0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/averages-interactive-practice/sssssjm0"/>
      <lastmod>2026-11-01T23:35:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-template/sssssjmd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-template/sssssjmd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-template/sssssjmd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-template/sssssjmd"/>
      <lastmod>2026-11-01T20:55:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-template/sssssjmd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-template/sssssjmd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-template/sssssjmd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-template/sssssjmd"/>
      <lastmod>2026-11-01T20:55:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/match-the-parabola/sssssjmf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/match-the-parabola/sssssjmf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/match-the-parabola/sssssjmf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/match-the-parabola/sssssjmf"/>
      <lastmod>2026-11-01T20:48:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/match-the-parabola/sssssjmf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/match-the-parabola/sssssjmf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/match-the-parabola/sssssjmf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/match-the-parabola/sssssjmf"/>
      <lastmod>2026-11-01T20:48:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilation-and-area-calculation/sssssjm8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-and-area-calculation/sssssjm8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-and-area-calculation/sssssjm8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-and-area-calculation/sssssjm8"/>
      <lastmod>2026-11-01T21:20:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilation-and-area-calculation/sssssjm8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-and-area-calculation/sssssjm8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-and-area-calculation/sssssjm8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-and-area-calculation/sssssjm8"/>
      <lastmod>2026-11-01T21:20:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/horizontal-and-vertical-translations-of-exponential-functions/sssssjmu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-and-vertical-translations-of-exponential-functions/sssssjmu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-and-vertical-translations-of-exponential-functions/sssssjmu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-and-vertical-translations-of-exponential-functions/sssssjmu"/>
      <lastmod>2026-11-01T23:36:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/horizontal-and-vertical-translations-of-exponential-functions/sssssjmu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-and-vertical-translations-of-exponential-functions/sssssjmu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-and-vertical-translations-of-exponential-functions/sssssjmu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-and-vertical-translations-of-exponential-functions/sssssjmu"/>
      <lastmod>2026-11-01T23:36:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-transformation-construction/sssssjm5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-transformation-construction/sssssjm5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-transformation-construction/sssssjm5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-transformation-construction/sssssjm5"/>
      <lastmod>2026-11-02T18:04:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-transformation-construction/sssssjm5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-transformation-construction/sssssjm5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-transformation-construction/sssssjm5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-transformation-construction/sssssjm5"/>
      <lastmod>2026-11-02T18:04:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/empirical-rule-exploration/sssssjmb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/empirical-rule-exploration/sssssjmb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/empirical-rule-exploration/sssssjmb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/empirical-rule-exploration/sssssjmb"/>
      <lastmod>2026-11-02T02:36:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/empirical-rule-exploration/sssssjmb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/empirical-rule-exploration/sssssjmb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/empirical-rule-exploration/sssssjmb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/empirical-rule-exploration/sssssjmb"/>
      <lastmod>2026-11-02T02:36:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-expanded-form-and-the-quadratic-formula/sssssjm3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-expanded-form-and-the-quadratic-formula/sssssjm3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-expanded-form-and-the-quadratic-formula/sssssjm3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-expanded-form-and-the-quadratic-formula/sssssjm3"/>
      <lastmod>2026-11-02T13:33:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-expanded-form-and-the-quadratic-formula/sssssjm3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-expanded-form-and-the-quadratic-formula/sssssjm3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-expanded-form-and-the-quadratic-formula/sssssjm3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-expanded-form-and-the-quadratic-formula/sssssjm3"/>
      <lastmod>2026-11-02T13:33:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-cylinder-inscribed-right-triangle-and-quadratic-function/sssssjmq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-cylinder-inscribed-right-triangle-and-quadratic-function/sssssjmq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-cylinder-inscribed-right-triangle-and-quadratic-function/sssssjmq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-cylinder-inscribed-right-triangle-and-quadratic-function/sssssjmq"/>
      <lastmod>2026-11-02T10:59:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-cylinder-inscribed-right-triangle-and-quadratic-function/sssssjmq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-cylinder-inscribed-right-triangle-and-quadratic-function/sssssjmq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-cylinder-inscribed-right-triangle-and-quadratic-function/sssssjmq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-cylinder-inscribed-right-triangle-and-quadratic-function/sssssjmq"/>
      <lastmod>2026-11-02T10:59:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vectors-magnitude-direction/sssssjm1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-magnitude-direction/sssssjm1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-magnitude-direction/sssssjm1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-magnitude-direction/sssssjm1"/>
      <lastmod>2026-11-01T21:38:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vectors-magnitude-direction/sssssjm1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-magnitude-direction/sssssjm1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-magnitude-direction/sssssjm1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-magnitude-direction/sssssjm1"/>
      <lastmod>2026-11-01T21:38:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-translations-on-a-coordinate-grid/sssssjmm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-translations-on-a-coordinate-grid/sssssjmm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-translations-on-a-coordinate-grid/sssssjmm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-translations-on-a-coordinate-grid/sssssjmm"/>
      <lastmod>2026-11-02T02:36:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-translations-on-a-coordinate-grid/sssssjmm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-translations-on-a-coordinate-grid/sssssjmm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-translations-on-a-coordinate-grid/sssssjmm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-translations-on-a-coordinate-grid/sssssjmm"/>
      <lastmod>2026-11-02T02:36:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/voronoi-by-inflating-spheres/sssssjmj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/voronoi-by-inflating-spheres/sssssjmj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/voronoi-by-inflating-spheres/sssssjmj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/voronoi-by-inflating-spheres/sssssjmj"/>
      <lastmod>2026-11-02T17:43:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/voronoi-by-inflating-spheres/sssssjmj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/voronoi-by-inflating-spheres/sssssjmj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/voronoi-by-inflating-spheres/sssssjmj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/voronoi-by-inflating-spheres/sssssjmj"/>
      <lastmod>2026-11-02T17:43:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-function-parameters-a-b-c-change/sssssjmp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-function-parameters-a-b-c-change/sssssjmp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-function-parameters-a-b-c-change/sssssjmp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-function-parameters-a-b-c-change/sssssjmp"/>
      <lastmod>2026-11-01T23:09:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-function-parameters-a-b-c-change/sssssjmp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-function-parameters-a-b-c-change/sssssjmp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-function-parameters-a-b-c-change/sssssjmp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-function-parameters-a-b-c-change/sssssjmp"/>
      <lastmod>2026-11-01T23:09:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-exploration-by-andrew-monjaras-pierson/sssssjmw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-exploration-by-andrew-monjaras-pierson/sssssjmw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-exploration-by-andrew-monjaras-pierson/sssssjmw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-exploration-by-andrew-monjaras-pierson/sssssjmw"/>
      <lastmod>2026-11-02T08:53:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-exploration-by-andrew-monjaras-pierson/sssssjmw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-exploration-by-andrew-monjaras-pierson/sssssjmw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-exploration-by-andrew-monjaras-pierson/sssssjmw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-exploration-by-andrew-monjaras-pierson/sssssjmw"/>
      <lastmod>2026-11-02T08:53:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-exploration-by-emily-davis/sssssjm6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-exploration-by-emily-davis/sssssjm6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-exploration-by-emily-davis/sssssjm6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-exploration-by-emily-davis/sssssjm6"/>
      <lastmod>2026-11-02T03:00:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-exploration-by-emily-davis/sssssjm6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-exploration-by-emily-davis/sssssjm6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-exploration-by-emily-davis/sssssjm6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-exploration-by-emily-davis/sssssjm6"/>
      <lastmod>2026-11-02T03:00:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-rolling-down-an-inclined-plane/sssssjmg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-rolling-down-an-inclined-plane/sssssjmg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-rolling-down-an-inclined-plane/sssssjmg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-rolling-down-an-inclined-plane/sssssjmg"/>
      <lastmod>2026-11-02T18:50:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-rolling-down-an-inclined-plane/sssssjmg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-rolling-down-an-inclined-plane/sssssjmg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-rolling-down-an-inclined-plane/sssssjmg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-rolling-down-an-inclined-plane/sssssjmg"/>
      <lastmod>2026-11-02T18:50:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-aas-angle-angle-side-congruence/sssssjm9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-aas-angle-angle-side-congruence/sssssjm9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-aas-angle-angle-side-congruence/sssssjm9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-aas-angle-angle-side-congruence/sssssjm9"/>
      <lastmod>2026-11-02T18:48:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-aas-angle-angle-side-congruence/sssssjm9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-aas-angle-angle-side-congruence/sssssjm9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-aas-angle-angle-side-congruence/sssssjm9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-aas-angle-angle-side-congruence/sssssjm9"/>
      <lastmod>2026-11-02T18:48:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slope-of-derivative-of-cubic-function/sssssjme</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-of-derivative-of-cubic-function/sssssjme"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-of-derivative-of-cubic-function/sssssjme"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-of-derivative-of-cubic-function/sssssjme"/>
      <lastmod>2026-11-02T16:55:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slope-of-derivative-of-cubic-function/sssssjme</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-of-derivative-of-cubic-function/sssssjme"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-of-derivative-of-cubic-function/sssssjme"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-of-derivative-of-cubic-function/sssssjme"/>
      <lastmod>2026-11-02T16:55:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-sharri-sandler/sssssjmv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-sharri-sandler/sssssjmv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-sharri-sandler/sssssjmv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-sharri-sandler/sssssjmv"/>
      <lastmod>2026-11-01T21:12:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-sharri-sandler/sssssjmv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-sharri-sandler/sssssjmv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-sharri-sandler/sssssjmv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-sharri-sandler/sssssjmv"/>
      <lastmod>2026-11-01T21:12:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/re-parametrization-of-vector-functions-and-their-derivatives-1/sssssjm4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/re-parametrization-of-vector-functions-and-their-derivatives-1/sssssjm4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/re-parametrization-of-vector-functions-and-their-derivatives-1/sssssjm4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/re-parametrization-of-vector-functions-and-their-derivatives-1/sssssjm4"/>
      <lastmod>2026-11-02T00:46:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/re-parametrization-of-vector-functions-and-their-derivatives-1/sssssjm4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/re-parametrization-of-vector-functions-and-their-derivatives-1/sssssjm4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/re-parametrization-of-vector-functions-and-their-derivatives-1/sssssjm4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/re-parametrization-of-vector-functions-and-their-derivatives-1/sssssjm4"/>
      <lastmod>2026-11-02T00:46:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-investigation-of-dot-product-of-2-vectors/sssssjml</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-investigation-of-dot-product-of-2-vectors/sssssjml"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-investigation-of-dot-product-of-2-vectors/sssssjml"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-investigation-of-dot-product-of-2-vectors/sssssjml"/>
      <lastmod>2026-11-01T21:26:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-investigation-of-dot-product-of-2-vectors/sssssjml</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-investigation-of-dot-product-of-2-vectors/sssssjml"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-investigation-of-dot-product-of-2-vectors/sssssjml"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-investigation-of-dot-product-of-2-vectors/sssssjml"/>
      <lastmod>2026-11-01T21:26:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbolic-coaxial-family-of-spheres/sssssjmy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbolic-coaxial-family-of-spheres/sssssjmy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbolic-coaxial-family-of-spheres/sssssjmy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbolic-coaxial-family-of-spheres/sssssjmy"/>
      <lastmod>2026-11-02T17:09:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbolic-coaxial-family-of-spheres/sssssjmy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbolic-coaxial-family-of-spheres/sssssjmy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbolic-coaxial-family-of-spheres/sssssjmy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbolic-coaxial-family-of-spheres/sssssjmy"/>
      <lastmod>2026-11-02T17:09:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mapping-triangles-with-equal-areas/sssssjma</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mapping-triangles-with-equal-areas/sssssjma"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mapping-triangles-with-equal-areas/sssssjma"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mapping-triangles-with-equal-areas/sssssjma"/>
      <lastmod>2026-11-02T18:19:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mapping-triangles-with-equal-areas/sssssjma</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mapping-triangles-with-equal-areas/sssssjma"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mapping-triangles-with-equal-areas/sssssjma"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mapping-triangles-with-equal-areas/sssssjma"/>
      <lastmod>2026-11-02T18:19:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-two-lines-by-ravi/sssssjmc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-two-lines-by-ravi/sssssjmc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-two-lines-by-ravi/sssssjmc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-two-lines-by-ravi/sssssjmc"/>
      <lastmod>2026-11-01T23:58:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-two-lines-by-ravi/sssssjmc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-two-lines-by-ravi/sssssjmc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-two-lines-by-ravi/sssssjmc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-two-lines-by-ravi/sssssjmc"/>
      <lastmod>2026-11-01T23:58:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-cube-by-benita/sssssjmr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cube-by-benita/sssssjmr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cube-by-benita/sssssjmr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cube-by-benita/sssssjmr"/>
      <lastmod>2026-11-02T18:56:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-a-cube-by-benita/sssssjmr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cube-by-benita/sssssjmr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cube-by-benita/sssssjmr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cube-by-benita/sssssjmr"/>
      <lastmod>2026-11-02T18:56:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mixed-fraction-conversion-and-improper-fraction-drawing/sssssjmh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mixed-fraction-conversion-and-improper-fraction-drawing/sssssjmh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mixed-fraction-conversion-and-improper-fraction-drawing/sssssjmh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mixed-fraction-conversion-and-improper-fraction-drawing/sssssjmh"/>
      <lastmod>2026-11-02T02:17:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mixed-fraction-conversion-and-improper-fraction-drawing/sssssjmh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mixed-fraction-conversion-and-improper-fraction-drawing/sssssjmh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mixed-fraction-conversion-and-improper-fraction-drawing/sssssjmh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mixed-fraction-conversion-and-improper-fraction-drawing/sssssjmh"/>
      <lastmod>2026-11-02T02:17:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integrated-sequence-vector-calculus-and-probability-demo/sssssjmt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integrated-sequence-vector-calculus-and-probability-demo/sssssjmt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integrated-sequence-vector-calculus-and-probability-demo/sssssjmt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integrated-sequence-vector-calculus-and-probability-demo/sssssjmt"/>
      <lastmod>2026-11-02T11:00:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integrated-sequence-vector-calculus-and-probability-demo/sssssjmt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integrated-sequence-vector-calculus-and-probability-demo/sssssjmt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integrated-sequence-vector-calculus-and-probability-demo/sssssjmt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integrated-sequence-vector-calculus-and-probability-demo/sssssjmt"/>
      <lastmod>2026-11-02T11:00:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-between-two-planes-basic/sssssjmx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-basic/sssssjmx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-two-planes-basic/sssssjmx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-basic/sssssjmx"/>
      <lastmod>2026-11-01T21:25:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-between-two-planes-basic/sssssjmx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-basic/sssssjmx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-two-planes-basic/sssssjmx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-two-planes-basic/sssssjmx"/>
      <lastmod>2026-11-01T21:25:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplying-complex-numbers-by-avril-daykin/sssssjmi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-complex-numbers-by-avril-daykin/sssssjmi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-complex-numbers-by-avril-daykin/sssssjmi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-complex-numbers-by-avril-daykin/sssssjmi"/>
      <lastmod>2026-11-02T17:49:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplying-complex-numbers-by-avril-daykin/sssssjmi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-complex-numbers-by-avril-daykin/sssssjmi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-complex-numbers-by-avril-daykin/sssssjmi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-complex-numbers-by-avril-daykin/sssssjmi"/>
      <lastmod>2026-11-02T17:49:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/feuerbach-theorem-demonstration/sssssjmo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/feuerbach-theorem-demonstration/sssssjmo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/feuerbach-theorem-demonstration/sssssjmo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/feuerbach-theorem-demonstration/sssssjmo"/>
      <lastmod>2026-11-02T18:40:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/feuerbach-theorem-demonstration/sssssjmo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/feuerbach-theorem-demonstration/sssssjmo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/feuerbach-theorem-demonstration/sssssjmo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/feuerbach-theorem-demonstration/sssssjmo"/>
      <lastmod>2026-11-02T18:40:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dijkstra-algorithm-visualization/sssssjjs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dijkstra-algorithm-visualization/sssssjjs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dijkstra-algorithm-visualization/sssssjjs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dijkstra-algorithm-visualization/sssssjjs"/>
      <lastmod>2026-11-02T08:54:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dijkstra-algorithm-visualization/sssssjjs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dijkstra-algorithm-visualization/sssssjjs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dijkstra-algorithm-visualization/sssssjjs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dijkstra-algorithm-visualization/sssssjjs"/>
      <lastmod>2026-11-02T08:54:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-negative-numbers-with-thermometer-model/sssssjj7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-negative-numbers-with-thermometer-model/sssssjj7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-negative-numbers-with-thermometer-model/sssssjj7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-negative-numbers-with-thermometer-model/sssssjj7"/>
      <lastmod>2026-11-01T21:18:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-negative-numbers-with-thermometer-model/sssssjj7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-negative-numbers-with-thermometer-model/sssssjj7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-negative-numbers-with-thermometer-model/sssssjj7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-negative-numbers-with-thermometer-model/sssssjj7"/>
      <lastmod>2026-11-01T21:18:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/maximize-area-of-the-rectangle-for-given-perimeter/sssssjjn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximize-area-of-the-rectangle-for-given-perimeter/sssssjjn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximize-area-of-the-rectangle-for-given-perimeter/sssssjjn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximize-area-of-the-rectangle-for-given-perimeter/sssssjjn"/>
      <lastmod>2026-11-01T20:59:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/maximize-area-of-the-rectangle-for-given-perimeter/sssssjjn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximize-area-of-the-rectangle-for-given-perimeter/sssssjjn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximize-area-of-the-rectangle-for-given-perimeter/sssssjjn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximize-area-of-the-rectangle-for-given-perimeter/sssssjjn"/>
      <lastmod>2026-11-01T20:59:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spherical-coordinates-by-noah/sssssjj2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-coordinates-by-noah/sssssjj2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-coordinates-by-noah/sssssjj2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-coordinates-by-noah/sssssjj2"/>
      <lastmod>2026-11-02T02:42:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spherical-coordinates-by-noah/sssssjj2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-coordinates-by-noah/sssssjj2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-coordinates-by-noah/sssssjj2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-coordinates-by-noah/sssssjj2"/>
      <lastmod>2026-11-02T02:42:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-complex-solutions-to-quadratic-functions/sssssjjk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-complex-solutions-to-quadratic-functions/sssssjjk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-complex-solutions-to-quadratic-functions/sssssjjk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-complex-solutions-to-quadratic-functions/sssssjjk"/>
      <lastmod>2026-11-02T09:31:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-complex-solutions-to-quadratic-functions/sssssjjk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-complex-solutions-to-quadratic-functions/sssssjjk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-complex-solutions-to-quadratic-functions/sssssjjk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-complex-solutions-to-quadratic-functions/sssssjjk"/>
      <lastmod>2026-11-02T09:31:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/locus-maintaining-equidistance-from-two-intersecting-lines/sssssjjz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-maintaining-equidistance-from-two-intersecting-lines/sssssjjz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-maintaining-equidistance-from-two-intersecting-lines/sssssjjz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-maintaining-equidistance-from-two-intersecting-lines/sssssjjz"/>
      <lastmod>2026-11-02T18:44:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/locus-maintaining-equidistance-from-two-intersecting-lines/sssssjjz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-maintaining-equidistance-from-two-intersecting-lines/sssssjjz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-maintaining-equidistance-from-two-intersecting-lines/sssssjjz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-maintaining-equidistance-from-two-intersecting-lines/sssssjjz"/>
      <lastmod>2026-11-02T18:44:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/h2m-2019-p1-q11b-math-example/sssssjj0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/h2m-2019-p1-q11b-math-example/sssssjj0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/h2m-2019-p1-q11b-math-example/sssssjj0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/h2m-2019-p1-q11b-math-example/sssssjj0"/>
      <lastmod>2026-11-01T23:08:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/h2m-2019-p1-q11b-math-example/sssssjj0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/h2m-2019-p1-q11b-math-example/sssssjj0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/h2m-2019-p1-q11b-math-example/sssssjj0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/h2m-2019-p1-q11b-math-example/sssssjj0"/>
      <lastmod>2026-11-01T23:08:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conic-sections-by-bed-prasad-dhakal/sssssjjd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-sections-by-bed-prasad-dhakal/sssssjjd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-sections-by-bed-prasad-dhakal/sssssjjd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-by-bed-prasad-dhakal/sssssjjd"/>
      <lastmod>2026-11-01T23:16:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conic-sections-by-bed-prasad-dhakal/sssssjjd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-sections-by-bed-prasad-dhakal/sssssjjd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-sections-by-bed-prasad-dhakal/sssssjjd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-by-bed-prasad-dhakal/sssssjjd"/>
      <lastmod>2026-11-01T23:16:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-functions-part-1/sssssjjf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-functions-part-1/sssssjjf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-functions-part-1/sssssjjf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-functions-part-1/sssssjjf"/>
      <lastmod>2026-11-02T17:12:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-functions-part-1/sssssjjf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-functions-part-1/sssssjjf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-functions-part-1/sssssjjf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-functions-part-1/sssssjjf"/>
      <lastmod>2026-11-02T17:12:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangles-with-fractional-side-lengths-by-geogebra-classroom-activities/sssssjj8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangles-with-fractional-side-lengths-by-geogebra-classroom-activities/sssssjj8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangles-with-fractional-side-lengths-by-geogebra-classroom-activities/sssssjj8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangles-with-fractional-side-lengths-by-geogebra-classroom-activities/sssssjj8"/>
      <lastmod>2026-11-01T22:59:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangles-with-fractional-side-lengths-by-geogebra-classroom-activities/sssssjj8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangles-with-fractional-side-lengths-by-geogebra-classroom-activities/sssssjj8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangles-with-fractional-side-lengths-by-geogebra-classroom-activities/sssssjj8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangles-with-fractional-side-lengths-by-geogebra-classroom-activities/sssssjj8"/>
      <lastmod>2026-11-01T22:59:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/taxicab-geometry-counterexamples-for-congruent-triangles/sssssjju</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/taxicab-geometry-counterexamples-for-congruent-triangles/sssssjju"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/taxicab-geometry-counterexamples-for-congruent-triangles/sssssjju"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/taxicab-geometry-counterexamples-for-congruent-triangles/sssssjju"/>
      <lastmod>2026-11-01T19:23:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/taxicab-geometry-counterexamples-for-congruent-triangles/sssssjju</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/taxicab-geometry-counterexamples-for-congruent-triangles/sssssjju"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/taxicab-geometry-counterexamples-for-congruent-triangles/sssssjju"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/taxicab-geometry-counterexamples-for-congruent-triangles/sssssjju"/>
      <lastmod>2026-11-01T19:23:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-transformations-probability-statistics-demo/sssssjj5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-probability-statistics-demo/sssssjj5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-probability-statistics-demo/sssssjj5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-probability-statistics-demo/sssssjj5"/>
      <lastmod>2026-11-01T23:36:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-transformations-probability-statistics-demo/sssssjj5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-probability-statistics-demo/sssssjj5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-probability-statistics-demo/sssssjj5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-probability-statistics-demo/sssssjj5"/>
      <lastmod>2026-11-01T23:36:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-with-diagonals-by-allie-fryer/sssssjjb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-with-diagonals-by-allie-fryer/sssssjjb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-with-diagonals-by-allie-fryer/sssssjjb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-with-diagonals-by-allie-fryer/sssssjjb"/>
      <lastmod>2026-11-02T18:59:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-with-diagonals-by-allie-fryer/sssssjjb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-with-diagonals-by-allie-fryer/sssssjjb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-with-diagonals-by-allie-fryer/sssssjjb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-with-diagonals-by-allie-fryer/sssssjjb"/>
      <lastmod>2026-11-02T18:59:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/connectivity-table/sssssjj3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connectivity-table/sssssjj3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connectivity-table/sssssjj3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connectivity-table/sssssjj3"/>
      <lastmod>2026-11-02T09:57:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/connectivity-table/sssssjj3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connectivity-table/sssssjj3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connectivity-table/sssssjj3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connectivity-table/sssssjj3"/>
      <lastmod>2026-11-02T09:57:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-by-singhsaurabhi169/sssssjjq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-by-singhsaurabhi169/sssssjjq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-by-singhsaurabhi169/sssssjjq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-by-singhsaurabhi169/sssssjjq"/>
      <lastmod>2026-11-02T17:16:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-by-singhsaurabhi169/sssssjjq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-by-singhsaurabhi169/sssssjjq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-by-singhsaurabhi169/sssssjjq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-by-singhsaurabhi169/sssssjjq"/>
      <lastmod>2026-11-02T17:16:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplying-complex-numbers-geometric-visualization/sssssjj1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-complex-numbers-geometric-visualization/sssssjj1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-complex-numbers-geometric-visualization/sssssjj1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-complex-numbers-geometric-visualization/sssssjj1"/>
      <lastmod>2026-11-01T21:22:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplying-complex-numbers-geometric-visualization/sssssjj1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-complex-numbers-geometric-visualization/sssssjj1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-complex-numbers-geometric-visualization/sssssjj1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-complex-numbers-geometric-visualization/sssssjj1"/>
      <lastmod>2026-11-01T21:22:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractal-curve-4-by-steve-phelps/sssssjjm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractal-curve-4-by-steve-phelps/sssssjjm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractal-curve-4-by-steve-phelps/sssssjjm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractal-curve-4-by-steve-phelps/sssssjjm"/>
      <lastmod>2026-11-02T15:30:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractal-curve-4-by-steve-phelps/sssssjjm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractal-curve-4-by-steve-phelps/sssssjjm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractal-curve-4-by-steve-phelps/sssssjjm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractal-curve-4-by-steve-phelps/sssssjjm"/>
      <lastmod>2026-11-02T15:30:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-root-and-sum-exploring-distances-and-variance-in-dynamic-geometry/sssssjjj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-and-sum-exploring-distances-and-variance-in-dynamic-geometry/sssssjjj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-and-sum-exploring-distances-and-variance-in-dynamic-geometry/sssssjjj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-and-sum-exploring-distances-and-variance-in-dynamic-geometry/sssssjjj"/>
      <lastmod>2026-11-02T18:10:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-root-and-sum-exploring-distances-and-variance-in-dynamic-geometry/sssssjjj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-and-sum-exploring-distances-and-variance-in-dynamic-geometry/sssssjjj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-and-sum-exploring-distances-and-variance-in-dynamic-geometry/sssssjjj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-and-sum-exploring-distances-and-variance-in-dynamic-geometry/sssssjjj"/>
      <lastmod>2026-11-02T18:10:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-matrix-transformations/sssssjjp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-matrix-transformations/sssssjjp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-matrix-transformations/sssssjjp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-matrix-transformations/sssssjjp"/>
      <lastmod>2026-11-02T16:46:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-matrix-transformations/sssssjjp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-matrix-transformations/sssssjjp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-matrix-transformations/sssssjjp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-matrix-transformations/sssssjjp"/>
      <lastmod>2026-11-02T16:46:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-function-exploration/sssssjjw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-function-exploration/sssssjjw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-function-exploration/sssssjjw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-function-exploration/sssssjjw"/>
      <lastmod>2026-11-02T00:00:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-function-exploration/sssssjjw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-function-exploration/sssssjjw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-function-exploration/sssssjjw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-function-exploration/sssssjjw"/>
      <lastmod>2026-11-02T00:00:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/first-quadrant-unit-circle/sssssjj6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/first-quadrant-unit-circle/sssssjj6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/first-quadrant-unit-circle/sssssjj6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/first-quadrant-unit-circle/sssssjj6"/>
      <lastmod>2026-11-01T21:11:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/first-quadrant-unit-circle/sssssjj6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/first-quadrant-unit-circle/sssssjj6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/first-quadrant-unit-circle/sssssjj6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/first-quadrant-unit-circle/sssssjj6"/>
      <lastmod>2026-11-01T21:11:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-and-integral-demo/sssssjjg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-and-integral-demo/sssssjjg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-and-integral-demo/sssssjjg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-and-integral-demo/sssssjjg"/>
      <lastmod>2026-11-02T14:58:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-and-integral-demo/sssssjjg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-and-integral-demo/sssssjjg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-and-integral-demo/sssssjjg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-and-integral-demo/sssssjjg"/>
      <lastmod>2026-11-02T14:58:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-meaning-of-derivative-for-f-x-ln-x/sssssjj9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-meaning-of-derivative-for-f-x-ln-x/sssssjj9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-meaning-of-derivative-for-f-x-ln-x/sssssjj9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-meaning-of-derivative-for-f-x-ln-x/sssssjj9"/>
      <lastmod>2026-11-02T00:23:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-meaning-of-derivative-for-f-x-ln-x/sssssjj9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-meaning-of-derivative-for-f-x-ln-x/sssssjj9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-meaning-of-derivative-for-f-x-ln-x/sssssjj9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-meaning-of-derivative-for-f-x-ln-x/sssssjj9"/>
      <lastmod>2026-11-02T00:23:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/line-of-sight-demo-cylinder-prism-and-pythagorean-theorem/sssssjje</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-of-sight-demo-cylinder-prism-and-pythagorean-theorem/sssssjje"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-of-sight-demo-cylinder-prism-and-pythagorean-theorem/sssssjje"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-of-sight-demo-cylinder-prism-and-pythagorean-theorem/sssssjje"/>
      <lastmod>2026-11-02T18:33:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/line-of-sight-demo-cylinder-prism-and-pythagorean-theorem/sssssjje</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-of-sight-demo-cylinder-prism-and-pythagorean-theorem/sssssjje"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-of-sight-demo-cylinder-prism-and-pythagorean-theorem/sssssjje"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-of-sight-demo-cylinder-prism-and-pythagorean-theorem/sssssjje"/>
      <lastmod>2026-11-02T18:33:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-lateral-area-calculation/sssssjjv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-lateral-area-calculation/sssssjjv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-lateral-area-calculation/sssssjjv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-lateral-area-calculation/sssssjjv"/>
      <lastmod>2026-11-02T13:14:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-lateral-area-calculation/sssssjjv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-lateral-area-calculation/sssssjjv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-lateral-area-calculation/sssssjjv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-lateral-area-calculation/sssssjjv"/>
      <lastmod>2026-11-02T13:14:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/classifying-rational-numbers-by-levi-j-guter/sssssjj4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/classifying-rational-numbers-by-levi-j-guter/sssssjj4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/classifying-rational-numbers-by-levi-j-guter/sssssjj4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/classifying-rational-numbers-by-levi-j-guter/sssssjj4"/>
      <lastmod>2026-11-01T21:29:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/classifying-rational-numbers-by-levi-j-guter/sssssjj4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/classifying-rational-numbers-by-levi-j-guter/sssssjj4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/classifying-rational-numbers-by-levi-j-guter/sssssjj4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/classifying-rational-numbers-by-levi-j-guter/sssssjj4"/>
      <lastmod>2026-11-01T21:29:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/determining-exact-values-of-sine-and-cosine-ratios/sssssjjl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/determining-exact-values-of-sine-and-cosine-ratios/sssssjjl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/determining-exact-values-of-sine-and-cosine-ratios/sssssjjl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/determining-exact-values-of-sine-and-cosine-ratios/sssssjjl"/>
      <lastmod>2026-11-02T18:38:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/determining-exact-values-of-sine-and-cosine-ratios/sssssjjl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/determining-exact-values-of-sine-and-cosine-ratios/sssssjjl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/determining-exact-values-of-sine-and-cosine-ratios/sssssjjl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/determining-exact-values-of-sine-and-cosine-ratios/sssssjjl"/>
      <lastmod>2026-11-02T18:38:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-volume-calculation-by-prabhash-paudel/sssssjjy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-volume-calculation-by-prabhash-paudel/sssssjjy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-volume-calculation-by-prabhash-paudel/sssssjjy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-volume-calculation-by-prabhash-paudel/sssssjjy"/>
      <lastmod>2026-11-02T06:42:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-volume-calculation-by-prabhash-paudel/sssssjjy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-volume-calculation-by-prabhash-paudel/sssssjjy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-volume-calculation-by-prabhash-paudel/sssssjjy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-volume-calculation-by-prabhash-paudel/sssssjjy"/>
      <lastmod>2026-11-02T06:42:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-right-triangles-by-selena-giroux/sssssjja</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-right-triangles-by-selena-giroux/sssssjja"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-right-triangles-by-selena-giroux/sssssjja"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-right-triangles-by-selena-giroux/sssssjja"/>
      <lastmod>2026-11-02T16:51:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-right-triangles-by-selena-giroux/sssssjja</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-right-triangles-by-selena-giroux/sssssjja"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-right-triangles-by-selena-giroux/sssssjja"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-right-triangles-by-selena-giroux/sssssjja"/>
      <lastmod>2026-11-02T16:51:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-aaa-congruence/sssssjjc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-aaa-congruence/sssssjjc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-aaa-congruence/sssssjjc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-aaa-congruence/sssssjjc"/>
      <lastmod>2026-11-02T17:50:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-aaa-congruence/sssssjjc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-aaa-congruence/sssssjjc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-aaa-congruence/sssssjjc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-aaa-congruence/sssssjjc"/>
      <lastmod>2026-11-02T17:50:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/variable-names-in-functions/sssssjjr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/variable-names-in-functions/sssssjjr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/variable-names-in-functions/sssssjjr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/variable-names-in-functions/sssssjjr"/>
      <lastmod>2026-11-01T22:10:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/variable-names-in-functions/sssssjjr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/variable-names-in-functions/sssssjjr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/variable-names-in-functions/sssssjjr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/variable-names-in-functions/sssssjjr"/>
      <lastmod>2026-11-01T22:10:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygonal-spiral/sssssjjh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygonal-spiral/sssssjjh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygonal-spiral/sssssjjh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygonal-spiral/sssssjjh"/>
      <lastmod>2026-11-01T19:16:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygonal-spiral/sssssjjh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygonal-spiral/sssssjjh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygonal-spiral/sssssjjh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygonal-spiral/sssssjjh"/>
      <lastmod>2026-11-01T19:16:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/combined-loads/sssssjjt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/combined-loads/sssssjjt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/combined-loads/sssssjjt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/combined-loads/sssssjjt"/>
      <lastmod>2026-11-01T21:43:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/combined-loads/sssssjjt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/combined-loads/sssssjjt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/combined-loads/sssssjjt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/combined-loads/sssssjjt"/>
      <lastmod>2026-11-01T21:43:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-tailed-z-test/sssssjjx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-tailed-z-test/sssssjjx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-tailed-z-test/sssssjjx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-tailed-z-test/sssssjjx"/>
      <lastmod>2026-11-02T17:34:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-tailed-z-test/sssssjjx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-tailed-z-test/sssssjjx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-tailed-z-test/sssssjjx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-tailed-z-test/sssssjjx"/>
      <lastmod>2026-11-02T17:34:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-right-triangles-demo/sssssjji</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-right-triangles-demo/sssssjji"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-right-triangles-demo/sssssjji"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-right-triangles-demo/sssssjji"/>
      <lastmod>2026-11-01T19:35:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-right-triangles-demo/sssssjji</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-right-triangles-demo/sssssjji"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-right-triangles-demo/sssssjji"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-right-triangles-demo/sssssjji"/>
      <lastmod>2026-11-01T19:35:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-cosine-function/sssssjjo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-cosine-function/sssssjjo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-cosine-function/sssssjjo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-cosine-function/sssssjjo"/>
      <lastmod>2026-11-02T02:47:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-cosine-function/sssssjjo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-cosine-function/sssssjjo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-cosine-function/sssssjjo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-cosine-function/sssssjjo"/>
      <lastmod>2026-11-02T02:47:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/phantom-graph-of-f-x-sinh-x/sssssjps</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-of-f-x-sinh-x/sssssjps"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-of-f-x-sinh-x/sssssjps"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-of-f-x-sinh-x/sssssjps"/>
      <lastmod>2026-11-02T17:40:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/phantom-graph-of-f-x-sinh-x/sssssjps</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-of-f-x-sinh-x/sssssjps"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-of-f-x-sinh-x/sssssjps"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-of-f-x-sinh-x/sssssjps"/>
      <lastmod>2026-11-02T17:40:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-comparison-between-cylinder-and-cone/sssssjp7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-comparison-between-cylinder-and-cone/sssssjp7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-comparison-between-cylinder-and-cone/sssssjp7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-comparison-between-cylinder-and-cone/sssssjp7"/>
      <lastmod>2026-11-02T17:17:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-comparison-between-cylinder-and-cone/sssssjp7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-comparison-between-cylinder-and-cone/sssssjp7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-comparison-between-cylinder-and-cone/sssssjp7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-comparison-between-cylinder-and-cone/sssssjp7"/>
      <lastmod>2026-11-02T17:17:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/locating-fractions-on-a-number-line-2/sssssjpn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locating-fractions-on-a-number-line-2/sssssjpn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locating-fractions-on-a-number-line-2/sssssjpn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locating-fractions-on-a-number-line-2/sssssjpn"/>
      <lastmod>2026-11-02T00:20:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/locating-fractions-on-a-number-line-2/sssssjpn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locating-fractions-on-a-number-line-2/sssssjpn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locating-fractions-on-a-number-line-2/sssssjpn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locating-fractions-on-a-number-line-2/sssssjpn"/>
      <lastmod>2026-11-02T00:20:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angles-part-2/sssssjp2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-part-2/sssssjp2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-part-2/sssssjp2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-part-2/sssssjp2"/>
      <lastmod>2026-11-02T18:11:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angles-part-2/sssssjp2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-part-2/sssssjp2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-part-2/sssssjp2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-part-2/sssssjp2"/>
      <lastmod>2026-11-02T18:11:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-linear-systems-by-graphing-by-kara-colley/sssssjpk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-systems-by-graphing-by-kara-colley/sssssjpk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-systems-by-graphing-by-kara-colley/sssssjpk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-systems-by-graphing-by-kara-colley/sssssjpk"/>
      <lastmod>2026-11-01T21:30:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-linear-systems-by-graphing-by-kara-colley/sssssjpk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-systems-by-graphing-by-kara-colley/sssssjpk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-systems-by-graphing-by-kara-colley/sssssjpk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-systems-by-graphing-by-kara-colley/sssssjpk"/>
      <lastmod>2026-11-01T21:30:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-complex-roots-of-quadratic-equations/sssssjpz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-complex-roots-of-quadratic-equations/sssssjpz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-complex-roots-of-quadratic-equations/sssssjpz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-complex-roots-of-quadratic-equations/sssssjpz"/>
      <lastmod>2026-11-02T18:34:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-complex-roots-of-quadratic-equations/sssssjpz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-complex-roots-of-quadratic-equations/sssssjpz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-complex-roots-of-quadratic-equations/sssssjpz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-complex-roots-of-quadratic-equations/sssssjpz"/>
      <lastmod>2026-11-02T18:34:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-8-7-15-practice-adding-and-subtracting-with-scientific-notation/sssssjp0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-8-7-15-practice-adding-and-subtracting-with-scientific-notation/sssssjp0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-8-7-15-practice-adding-and-subtracting-with-scientific-notation/sssssjp0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-8-7-15-practice-adding-and-subtracting-with-scientific-notation/sssssjp0"/>
      <lastmod>2026-11-02T10:35:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-8-7-15-practice-adding-and-subtracting-with-scientific-notation/sssssjp0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-8-7-15-practice-adding-and-subtracting-with-scientific-notation/sssssjp0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-8-7-15-practice-adding-and-subtracting-with-scientific-notation/sssssjp0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-8-7-15-practice-adding-and-subtracting-with-scientific-notation/sssssjp0"/>
      <lastmod>2026-11-02T10:35:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-based-tetrahedron-proof/sssssjpd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-based-tetrahedron-proof/sssssjpd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-based-tetrahedron-proof/sssssjpd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-based-tetrahedron-proof/sssssjpd"/>
      <lastmod>2026-11-01T23:28:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-based-tetrahedron-proof/sssssjpd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-based-tetrahedron-proof/sssssjpd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-based-tetrahedron-proof/sssssjpd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-based-tetrahedron-proof/sssssjpd"/>
      <lastmod>2026-11-01T23:28:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/eigenvectors-3/sssssjpf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eigenvectors-3/sssssjpf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eigenvectors-3/sssssjpf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eigenvectors-3/sssssjpf"/>
      <lastmod>2026-11-01T21:28:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/eigenvectors-3/sssssjpf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eigenvectors-3/sssssjpf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eigenvectors-3/sssssjpf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eigenvectors-3/sssssjpf"/>
      <lastmod>2026-11-01T21:28:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-modeling-with-ar-part-10-cereal-bowl-function-modeling/sssssjp8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-modeling-with-ar-part-10-cereal-bowl-function-modeling/sssssjp8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-modeling-with-ar-part-10-cereal-bowl-function-modeling/sssssjp8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-modeling-with-ar-part-10-cereal-bowl-function-modeling/sssssjp8"/>
      <lastmod>2026-11-01T21:27:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-modeling-with-ar-part-10-cereal-bowl-function-modeling/sssssjp8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-modeling-with-ar-part-10-cereal-bowl-function-modeling/sssssjp8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-modeling-with-ar-part-10-cereal-bowl-function-modeling/sssssjp8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-modeling-with-ar-part-10-cereal-bowl-function-modeling/sssssjp8"/>
      <lastmod>2026-11-01T21:27:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-root-speed-demo/sssssjpu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-root-speed-demo/sssssjpu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-root-speed-demo/sssssjpu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-root-speed-demo/sssssjpu"/>
      <lastmod>2026-11-02T16:49:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-root-speed-demo/sssssjpu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-root-speed-demo/sssssjpu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-root-speed-demo/sssssjpu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-root-speed-demo/sssssjpu"/>
      <lastmod>2026-11-02T16:49:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-parabola/sssssjp5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-parabola/sssssjp5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-parabola/sssssjp5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-parabola/sssssjp5"/>
      <lastmod>2026-11-01T23:59:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-parabola/sssssjp5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-parabola/sssssjp5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-parabola/sssssjp5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-parabola/sssssjp5"/>
      <lastmod>2026-11-01T23:59:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-trapezoid-octagon-construction/sssssjpb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-trapezoid-octagon-construction/sssssjpb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-trapezoid-octagon-construction/sssssjpb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-trapezoid-octagon-construction/sssssjpb"/>
      <lastmod>2026-11-02T18:17:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-trapezoid-octagon-construction/sssssjpb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-trapezoid-octagon-construction/sssssjpb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-trapezoid-octagon-construction/sssssjpb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-trapezoid-octagon-construction/sssssjpb"/>
      <lastmod>2026-11-02T18:17:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/characteristic-ratio-for-a-parabola/sssssjp3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/characteristic-ratio-for-a-parabola/sssssjp3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/characteristic-ratio-for-a-parabola/sssssjp3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/characteristic-ratio-for-a-parabola/sssssjp3"/>
      <lastmod>2026-11-02T16:47:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/characteristic-ratio-for-a-parabola/sssssjp3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/characteristic-ratio-for-a-parabola/sssssjp3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/characteristic-ratio-for-a-parabola/sssssjp3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/characteristic-ratio-for-a-parabola/sssssjp3"/>
      <lastmod>2026-11-02T16:47:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-a-triangle-discovery/sssssjpq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-triangle-discovery/sssssjpq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-triangle-discovery/sssssjpq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-triangle-discovery/sssssjpq"/>
      <lastmod>2026-11-02T18:31:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-a-triangle-discovery/sssssjpq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-triangle-discovery/sssssjpq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-triangle-discovery/sssssjpq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-triangle-discovery/sssssjpq"/>
      <lastmod>2026-11-02T18:31:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-volume-total-surface-area-practice/sssssjp1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-volume-total-surface-area-practice/sssssjp1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-volume-total-surface-area-practice/sssssjp1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-volume-total-surface-area-practice/sssssjp1"/>
      <lastmod>2026-11-02T18:38:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-volume-total-surface-area-practice/sssssjp1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-volume-total-surface-area-practice/sssssjp1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-volume-total-surface-area-practice/sssssjp1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-volume-total-surface-area-practice/sssssjp1"/>
      <lastmod>2026-11-02T18:38:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphs-of-exponential-functions-by-peter-sassman/sssssjpm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphs-of-exponential-functions-by-peter-sassman/sssssjpm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphs-of-exponential-functions-by-peter-sassman/sssssjpm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphs-of-exponential-functions-by-peter-sassman/sssssjpm"/>
      <lastmod>2026-11-02T18:20:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphs-of-exponential-functions-by-peter-sassman/sssssjpm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphs-of-exponential-functions-by-peter-sassman/sssssjpm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphs-of-exponential-functions-by-peter-sassman/sssssjpm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphs-of-exponential-functions-by-peter-sassman/sssssjpm"/>
      <lastmod>2026-11-02T18:20:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-unit-circle/sssssjpj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-unit-circle/sssssjpj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-unit-circle/sssssjpj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-unit-circle/sssssjpj"/>
      <lastmod>2026-11-01T23:48:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-unit-circle/sssssjpj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-unit-circle/sssssjpj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-unit-circle/sssssjpj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-unit-circle/sssssjpj"/>
      <lastmod>2026-11-01T23:48:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/number-of-pythagorean-triples-with-odd-side-a/sssssjpp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-of-pythagorean-triples-with-odd-side-a/sssssjpp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-of-pythagorean-triples-with-odd-side-a/sssssjpp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-of-pythagorean-triples-with-odd-side-a/sssssjpp"/>
      <lastmod>2026-11-01T21:55:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/number-of-pythagorean-triples-with-odd-side-a/sssssjpp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-of-pythagorean-triples-with-odd-side-a/sssssjpp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-of-pythagorean-triples-with-odd-side-a/sssssjpp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-of-pythagorean-triples-with-odd-side-a/sssssjpp"/>
      <lastmod>2026-11-01T21:55:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logarithmic-functions-graphs-by-anuchit/sssssjpw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-functions-graphs-by-anuchit/sssssjpw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-functions-graphs-by-anuchit/sssssjpw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-functions-graphs-by-anuchit/sssssjpw"/>
      <lastmod>2026-11-02T00:45:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logarithmic-functions-graphs-by-anuchit/sssssjpw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-functions-graphs-by-anuchit/sssssjpw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-functions-graphs-by-anuchit/sssssjpw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-functions-graphs-by-anuchit/sssssjpw"/>
      <lastmod>2026-11-02T00:45:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-and-subtracting-fractions-on-a-number-line/sssssjp6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-and-subtracting-fractions-on-a-number-line/sssssjp6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-and-subtracting-fractions-on-a-number-line/sssssjp6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-and-subtracting-fractions-on-a-number-line/sssssjp6"/>
      <lastmod>2026-11-01T23:34:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-and-subtracting-fractions-on-a-number-line/sssssjp6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-and-subtracting-fractions-on-a-number-line/sssssjp6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-and-subtracting-fractions-on-a-number-line/sssssjp6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-and-subtracting-fractions-on-a-number-line/sssssjp6"/>
      <lastmod>2026-11-01T23:34:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triple-cylinder-screw/sssssjpg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triple-cylinder-screw/sssssjpg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triple-cylinder-screw/sssssjpg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triple-cylinder-screw/sssssjpg"/>
      <lastmod>2026-11-01T23:55:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triple-cylinder-screw/sssssjpg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triple-cylinder-screw/sssssjpg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triple-cylinder-screw/sssssjpg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triple-cylinder-screw/sssssjpg"/>
      <lastmod>2026-11-01T23:55:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/four-toroids/sssssjp9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/four-toroids/sssssjp9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/four-toroids/sssssjp9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/four-toroids/sssssjp9"/>
      <lastmod>2026-11-02T06:16:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/four-toroids/sssssjp9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/four-toroids/sssssjp9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/four-toroids/sssssjp9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/four-toroids/sssssjp9"/>
      <lastmod>2026-11-02T06:16:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/addition-on-number-line-by-sanjay-gulati/sssssjpe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-on-number-line-by-sanjay-gulati/sssssjpe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-on-number-line-by-sanjay-gulati/sssssjpe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-on-number-line-by-sanjay-gulati/sssssjpe"/>
      <lastmod>2026-11-02T02:21:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/addition-on-number-line-by-sanjay-gulati/sssssjpe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-on-number-line-by-sanjay-gulati/sssssjpe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-on-number-line-by-sanjay-gulati/sssssjpe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-on-number-line-by-sanjay-gulati/sssssjpe"/>
      <lastmod>2026-11-02T02:21:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similarity-in-1-2-and-3-dimensions/sssssjpv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similarity-in-1-2-and-3-dimensions/sssssjpv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similarity-in-1-2-and-3-dimensions/sssssjpv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similarity-in-1-2-and-3-dimensions/sssssjpv"/>
      <lastmod>2026-11-02T17:49:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similarity-in-1-2-and-3-dimensions/sssssjpv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similarity-in-1-2-and-3-dimensions/sssssjpv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similarity-in-1-2-and-3-dimensions/sssssjpv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similarity-in-1-2-and-3-dimensions/sssssjpv"/>
      <lastmod>2026-11-02T17:49:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-a-rectangle/sssssjp4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-rectangle/sssssjp4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-rectangle/sssssjp4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-rectangle/sssssjp4"/>
      <lastmod>2026-11-02T13:50:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-a-rectangle/sssssjp4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-rectangle/sssssjp4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-rectangle/sssssjp4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-rectangle/sssssjp4"/>
      <lastmod>2026-11-02T13:50:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-function-intersection-solutions/sssssjpl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-function-intersection-solutions/sssssjpl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-function-intersection-solutions/sssssjpl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-function-intersection-solutions/sssssjpl"/>
      <lastmod>2026-11-02T18:35:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-function-intersection-solutions/sssssjpl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-function-intersection-solutions/sssssjpl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-function-intersection-solutions/sssssjpl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-function-intersection-solutions/sssssjpl"/>
      <lastmod>2026-11-02T18:35:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-with-parameters-h-k-and-point-a/sssssjpy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-with-parameters-h-k-and-point-a/sssssjpy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-with-parameters-h-k-and-point-a/sssssjpy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-with-parameters-h-k-and-point-a/sssssjpy"/>
      <lastmod>2026-11-02T11:50:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-with-parameters-h-k-and-point-a/sssssjpy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-with-parameters-h-k-and-point-a/sssssjpy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-with-parameters-h-k-and-point-a/sssssjpy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-with-parameters-h-k-and-point-a/sssssjpy"/>
      <lastmod>2026-11-02T11:50:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersections-of-gerono-lemniskate-surface-with-a-moving-plane/sssssjpa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersections-of-gerono-lemniskate-surface-with-a-moving-plane/sssssjpa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersections-of-gerono-lemniskate-surface-with-a-moving-plane/sssssjpa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersections-of-gerono-lemniskate-surface-with-a-moving-plane/sssssjpa"/>
      <lastmod>2026-11-02T15:16:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersections-of-gerono-lemniskate-surface-with-a-moving-plane/sssssjpa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersections-of-gerono-lemniskate-surface-with-a-moving-plane/sssssjpa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersections-of-gerono-lemniskate-surface-with-a-moving-plane/sssssjpa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersections-of-gerono-lemniskate-surface-with-a-moving-plane/sssssjpa"/>
      <lastmod>2026-11-02T15:16:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-linear-relations-from-intercepts/sssssjpc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-relations-from-intercepts/sssssjpc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-relations-from-intercepts/sssssjpc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-relations-from-intercepts/sssssjpc"/>
      <lastmod>2026-11-02T02:57:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-linear-relations-from-intercepts/sssssjpc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-relations-from-intercepts/sssssjpc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-relations-from-intercepts/sssssjpc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-relations-from-intercepts/sssssjpc"/>
      <lastmod>2026-11-02T02:57:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a-level-maths-c4-2014-r-q6-vectors/sssssjpr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-level-maths-c4-2014-r-q6-vectors/sssssjpr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-level-maths-c4-2014-r-q6-vectors/sssssjpr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-level-maths-c4-2014-r-q6-vectors/sssssjpr"/>
      <lastmod>2026-11-02T18:57:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a-level-maths-c4-2014-r-q6-vectors/sssssjpr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-level-maths-c4-2014-r-q6-vectors/sssssjpr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-level-maths-c4-2014-r-q6-vectors/sssssjpr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-level-maths-c4-2014-r-q6-vectors/sssssjpr"/>
      <lastmod>2026-11-02T18:57:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/connections-between-points-by-chris-cambr-3/sssssjph</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connections-between-points-by-chris-cambr-3/sssssjph"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connections-between-points-by-chris-cambr-3/sssssjph"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connections-between-points-by-chris-cambr-3/sssssjph"/>
      <lastmod>2026-11-02T18:39:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/connections-between-points-by-chris-cambr-3/sssssjph</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connections-between-points-by-chris-cambr-3/sssssjph"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connections-between-points-by-chris-cambr-3/sssssjph"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connections-between-points-by-chris-cambr-3/sssssjph"/>
      <lastmod>2026-11-02T18:39:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadrilateral-construction-by-madison-wise/sssssjpt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-construction-by-madison-wise/sssssjpt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-construction-by-madison-wise/sssssjpt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-construction-by-madison-wise/sssssjpt"/>
      <lastmod>2026-11-01T23:35:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadrilateral-construction-by-madison-wise/sssssjpt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-construction-by-madison-wise/sssssjpt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-construction-by-madison-wise/sssssjpt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-construction-by-madison-wise/sssssjpt"/>
      <lastmod>2026-11-01T23:35:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-activity-template/sssssjpx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-activity-template/sssssjpx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-activity-template/sssssjpx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-activity-template/sssssjpx"/>
      <lastmod>2026-11-02T09:50:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-activity-template/sssssjpx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-activity-template/sssssjpx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-activity-template/sssssjpx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-activity-template/sssssjpx"/>
      <lastmod>2026-11-02T09:50:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/randomly-pick-letter-replace/sssssjpi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/randomly-pick-letter-replace/sssssjpi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/randomly-pick-letter-replace/sssssjpi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/randomly-pick-letter-replace/sssssjpi"/>
      <lastmod>2026-11-02T16:42:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/randomly-pick-letter-replace/sssssjpi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/randomly-pick-letter-replace/sssssjpi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/randomly-pick-letter-replace/sssssjpi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/randomly-pick-letter-replace/sssssjpi"/>
      <lastmod>2026-11-02T16:42:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-inequalities/sssssjpo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-inequalities/sssssjpo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-inequalities/sssssjpo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-inequalities/sssssjpo"/>
      <lastmod>2026-11-02T00:38:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-inequalities/sssssjpo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-inequalities/sssssjpo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-inequalities/sssssjpo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-inequalities/sssssjpo"/>
      <lastmod>2026-11-02T00:38:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/candy-bar-measurement-by-arthur-lee/sssssjws</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/candy-bar-measurement-by-arthur-lee/sssssjws"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/candy-bar-measurement-by-arthur-lee/sssssjws"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/candy-bar-measurement-by-arthur-lee/sssssjws"/>
      <lastmod>2026-11-01T23:45:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/candy-bar-measurement-by-arthur-lee/sssssjws</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/candy-bar-measurement-by-arthur-lee/sssssjws"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/candy-bar-measurement-by-arthur-lee/sssssjws"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/candy-bar-measurement-by-arthur-lee/sssssjws"/>
      <lastmod>2026-11-01T23:45:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spherical-coordinates-geogebra-example/sssssjw7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-coordinates-geogebra-example/sssssjw7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-coordinates-geogebra-example/sssssjw7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-coordinates-geogebra-example/sssssjw7"/>
      <lastmod>2026-11-02T09:27:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spherical-coordinates-geogebra-example/sssssjw7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-coordinates-geogebra-example/sssssjw7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-coordinates-geogebra-example/sssssjw7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-coordinates-geogebra-example/sssssjw7"/>
      <lastmod>2026-11-02T09:27:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/variable-cube-by-daniel-little/sssssjwn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/variable-cube-by-daniel-little/sssssjwn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/variable-cube-by-daniel-little/sssssjwn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/variable-cube-by-daniel-little/sssssjwn"/>
      <lastmod>2026-11-02T17:44:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/variable-cube-by-daniel-little/sssssjwn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/variable-cube-by-daniel-little/sssssjwn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/variable-cube-by-daniel-little/sssssjwn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/variable-cube-by-daniel-little/sssssjwn"/>
      <lastmod>2026-11-02T17:44:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-of-a-given-amount-probability/sssssjw2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-of-a-given-amount-probability/sssssjw2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-of-a-given-amount-probability/sssssjw2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-of-a-given-amount-probability/sssssjw2"/>
      <lastmod>2026-11-02T12:11:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-of-a-given-amount-probability/sssssjw2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-of-a-given-amount-probability/sssssjw2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-of-a-given-amount-probability/sssssjw2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-of-a-given-amount-probability/sssssjw2"/>
      <lastmod>2026-11-02T12:11:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/one-hundred-trials-of-100-coin-flips-number-of-heads/sssssjwk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-hundred-trials-of-100-coin-flips-number-of-heads/sssssjwk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-hundred-trials-of-100-coin-flips-number-of-heads/sssssjwk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-hundred-trials-of-100-coin-flips-number-of-heads/sssssjwk"/>
      <lastmod>2026-11-01T19:26:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/one-hundred-trials-of-100-coin-flips-number-of-heads/sssssjwk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-hundred-trials-of-100-coin-flips-number-of-heads/sssssjwk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-hundred-trials-of-100-coin-flips-number-of-heads/sssssjwk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-hundred-trials-of-100-coin-flips-number-of-heads/sssssjwk"/>
      <lastmod>2026-11-01T19:26:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/build-the-net-of-a-prism-by-dragging-faces/sssssjwz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/build-the-net-of-a-prism-by-dragging-faces/sssssjwz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/build-the-net-of-a-prism-by-dragging-faces/sssssjwz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/build-the-net-of-a-prism-by-dragging-faces/sssssjwz"/>
      <lastmod>2026-11-02T11:06:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/build-the-net-of-a-prism-by-dragging-faces/sssssjwz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/build-the-net-of-a-prism-by-dragging-faces/sssssjwz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/build-the-net-of-a-prism-by-dragging-faces/sssssjwz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/build-the-net-of-a-prism-by-dragging-faces/sssssjwz"/>
      <lastmod>2026-11-02T11:06:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-without-words-area-under-the-cycloid/sssssjw0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-without-words-area-under-the-cycloid/sssssjw0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-without-words-area-under-the-cycloid/sssssjw0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-without-words-area-under-the-cycloid/sssssjw0"/>
      <lastmod>2026-11-01T19:32:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-without-words-area-under-the-cycloid/sssssjw0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-without-words-area-under-the-cycloid/sssssjw0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-without-words-area-under-the-cycloid/sssssjw0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-without-words-area-under-the-cycloid/sssssjw0"/>
      <lastmod>2026-11-01T19:32:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-circles-in-a-rectangle/sssssjwd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-circles-in-a-rectangle/sssssjwd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-circles-in-a-rectangle/sssssjwd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-circles-in-a-rectangle/sssssjwd"/>
      <lastmod>2026-11-02T16:53:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-circles-in-a-rectangle/sssssjwd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-circles-in-a-rectangle/sssssjwd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-circles-in-a-rectangle/sssssjwd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-circles-in-a-rectangle/sssssjwd"/>
      <lastmod>2026-11-02T16:53:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-ellipse-and-circle-with-trace/sssssjwf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-ellipse-and-circle-with-trace/sssssjwf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-ellipse-and-circle-with-trace/sssssjwf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-ellipse-and-circle-with-trace/sssssjwf"/>
      <lastmod>2026-11-02T03:18:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-ellipse-and-circle-with-trace/sssssjwf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-ellipse-and-circle-with-trace/sssssjwf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-ellipse-and-circle-with-trace/sssssjwf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-ellipse-and-circle-with-trace/sssssjwf"/>
      <lastmod>2026-11-02T03:18:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prism-net-by-reinhard-schmidt/sssssjw8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-net-by-reinhard-schmidt/sssssjw8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-net-by-reinhard-schmidt/sssssjw8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-net-by-reinhard-schmidt/sssssjw8"/>
      <lastmod>2026-11-02T17:09:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prism-net-by-reinhard-schmidt/sssssjw8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-net-by-reinhard-schmidt/sssssjw8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-net-by-reinhard-schmidt/sssssjw8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-net-by-reinhard-schmidt/sssssjw8"/>
      <lastmod>2026-11-02T17:09:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/addition-and-subtraction-of-polynomials-by-patrick-chung/sssssjwu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-and-subtraction-of-polynomials-by-patrick-chung/sssssjwu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-and-subtraction-of-polynomials-by-patrick-chung/sssssjwu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-and-subtraction-of-polynomials-by-patrick-chung/sssssjwu"/>
      <lastmod>2026-11-01T20:43:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/addition-and-subtraction-of-polynomials-by-patrick-chung/sssssjwu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-and-subtraction-of-polynomials-by-patrick-chung/sssssjwu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-and-subtraction-of-polynomials-by-patrick-chung/sssssjwu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-and-subtraction-of-polynomials-by-patrick-chung/sssssjwu"/>
      <lastmod>2026-11-01T20:43:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-histogram-and-statistics-demo/sssssjw5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-histogram-and-statistics-demo/sssssjw5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-histogram-and-statistics-demo/sssssjw5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-histogram-and-statistics-demo/sssssjw5"/>
      <lastmod>2026-11-02T18:15:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-histogram-and-statistics-demo/sssssjw5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-histogram-and-statistics-demo/sssssjw5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-histogram-and-statistics-demo/sssssjw5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-histogram-and-statistics-demo/sssssjw5"/>
      <lastmod>2026-11-02T18:15:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilations-practice-by-jennifer-ross/sssssjwb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-practice-by-jennifer-ross/sssssjwb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-practice-by-jennifer-ross/sssssjwb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-practice-by-jennifer-ross/sssssjwb"/>
      <lastmod>2026-11-02T17:56:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilations-practice-by-jennifer-ross/sssssjwb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-practice-by-jennifer-ross/sssssjwb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-practice-by-jennifer-ross/sssssjwb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-practice-by-jennifer-ross/sssssjwb"/>
      <lastmod>2026-11-02T17:56:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-surface-demonstration/sssssjw3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-surface-demonstration/sssssjw3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-surface-demonstration/sssssjw3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-surface-demonstration/sssssjw3"/>
      <lastmod>2026-11-01T19:36:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-surface-demonstration/sssssjw3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-surface-demonstration/sssssjw3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-surface-demonstration/sssssjw3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-surface-demonstration/sssssjw3"/>
      <lastmod>2026-11-01T19:36:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interval-division-and-integral-approximation/sssssjwq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interval-division-and-integral-approximation/sssssjwq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interval-division-and-integral-approximation/sssssjwq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interval-division-and-integral-approximation/sssssjwq"/>
      <lastmod>2026-11-02T15:34:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interval-division-and-integral-approximation/sssssjwq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interval-division-and-integral-approximation/sssssjwq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interval-division-and-integral-approximation/sssssjwq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interval-division-and-integral-approximation/sssssjwq"/>
      <lastmod>2026-11-02T15:34:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tape-diagrams-in-algebra-with-examples-by-artipal81-4/sssssjw1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tape-diagrams-in-algebra-with-examples-by-artipal81-4/sssssjw1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tape-diagrams-in-algebra-with-examples-by-artipal81-4/sssssjw1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tape-diagrams-in-algebra-with-examples-by-artipal81-4/sssssjw1"/>
      <lastmod>2026-11-01T20:48:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tape-diagrams-in-algebra-with-examples-by-artipal81-4/sssssjw1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tape-diagrams-in-algebra-with-examples-by-artipal81-4/sssssjw1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tape-diagrams-in-algebra-with-examples-by-artipal81-4/sssssjw1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tape-diagrams-in-algebra-with-examples-by-artipal81-4/sssssjw1"/>
      <lastmod>2026-11-01T20:48:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dse-trigonometry-act04-tracing-trigonometric-ratios-in-a-unit-circle/sssssjwm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dse-trigonometry-act04-tracing-trigonometric-ratios-in-a-unit-circle/sssssjwm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dse-trigonometry-act04-tracing-trigonometric-ratios-in-a-unit-circle/sssssjwm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dse-trigonometry-act04-tracing-trigonometric-ratios-in-a-unit-circle/sssssjwm"/>
      <lastmod>2026-11-02T11:52:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dse-trigonometry-act04-tracing-trigonometric-ratios-in-a-unit-circle/sssssjwm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dse-trigonometry-act04-tracing-trigonometric-ratios-in-a-unit-circle/sssssjwm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dse-trigonometry-act04-tracing-trigonometric-ratios-in-a-unit-circle/sssssjwm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dse-trigonometry-act04-tracing-trigonometric-ratios-in-a-unit-circle/sssssjwm"/>
      <lastmod>2026-11-02T11:52:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logarithmic-function-and-tangent-line/sssssjwj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-function-and-tangent-line/sssssjwj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-function-and-tangent-line/sssssjwj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-function-and-tangent-line/sssssjwj"/>
      <lastmod>2026-11-01T23:16:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logarithmic-function-and-tangent-line/sssssjwj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-function-and-tangent-line/sssssjwj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-function-and-tangent-line/sssssjwj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-function-and-tangent-line/sssssjwj"/>
      <lastmod>2026-11-01T23:16:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-curve-graphing/sssssjwp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-curve-graphing/sssssjwp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-curve-graphing/sssssjwp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-curve-graphing/sssssjwp"/>
      <lastmod>2026-11-01T21:16:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-curve-graphing/sssssjwp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-curve-graphing/sssssjwp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-curve-graphing/sssssjwp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-curve-graphing/sssssjwp"/>
      <lastmod>2026-11-01T21:16:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-construction/sssssjww</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction/sssssjww"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction/sssssjww"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction/sssssjww"/>
      <lastmod>2026-11-01T21:20:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-construction/sssssjww</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction/sssssjww"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction/sssssjww"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction/sssssjww"/>
      <lastmod>2026-11-01T21:20:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/how-well-can-you-measure/sssssjw6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-well-can-you-measure/sssssjw6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-well-can-you-measure/sssssjw6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-well-can-you-measure/sssssjw6"/>
      <lastmod>2026-11-01T20:31:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/how-well-can-you-measure/sssssjw6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-well-can-you-measure/sssssjw6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-well-can-you-measure/sssssjw6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-well-can-you-measure/sssssjw6"/>
      <lastmod>2026-11-01T20:31:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-interior-angle-sum/sssssjwg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-interior-angle-sum/sssssjwg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-interior-angle-sum/sssssjwg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-interior-angle-sum/sssssjwg"/>
      <lastmod>2026-11-01T21:29:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-interior-angle-sum/sssssjwg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-interior-angle-sum/sssssjwg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-interior-angle-sum/sssssjwg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-interior-angle-sum/sssssjwg"/>
      <lastmod>2026-11-01T21:29:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-and-cone-cross-sections/sssssjw9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-and-cone-cross-sections/sssssjw9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-and-cone-cross-sections/sssssjw9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-and-cone-cross-sections/sssssjw9"/>
      <lastmod>2026-11-02T18:35:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-and-cone-cross-sections/sssssjw9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-and-cone-cross-sections/sssssjw9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-and-cone-cross-sections/sssssjw9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-and-cone-cross-sections/sssssjw9"/>
      <lastmod>2026-11-02T18:35:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/same-side-exterior-angles-quick-investigation/sssssjwe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/same-side-exterior-angles-quick-investigation/sssssjwe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/same-side-exterior-angles-quick-investigation/sssssjwe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/same-side-exterior-angles-quick-investigation/sssssjwe"/>
      <lastmod>2026-11-02T18:05:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/same-side-exterior-angles-quick-investigation/sssssjwe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/same-side-exterior-angles-quick-investigation/sssssjwe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/same-side-exterior-angles-quick-investigation/sssssjwe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/same-side-exterior-angles-quick-investigation/sssssjwe"/>
      <lastmod>2026-11-02T18:05:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/midsegment-of-trapezoid/sssssjwv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/midsegment-of-trapezoid/sssssjwv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/midsegment-of-trapezoid/sssssjwv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/midsegment-of-trapezoid/sssssjwv"/>
      <lastmod>2026-11-02T17:08:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/midsegment-of-trapezoid/sssssjwv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/midsegment-of-trapezoid/sssssjwv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/midsegment-of-trapezoid/sssssjwv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/midsegment-of-trapezoid/sssssjwv"/>
      <lastmod>2026-11-02T17:08:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/testing-for-independent-column-vectors/sssssjw4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/testing-for-independent-column-vectors/sssssjw4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/testing-for-independent-column-vectors/sssssjw4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/testing-for-independent-column-vectors/sssssjw4"/>
      <lastmod>2026-11-02T18:16:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/testing-for-independent-column-vectors/sssssjw4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/testing-for-independent-column-vectors/sssssjw4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/testing-for-independent-column-vectors/sssssjw4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/testing-for-independent-column-vectors/sssssjw4"/>
      <lastmod>2026-11-02T18:16:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/investigating-rhombus-dissection-of-regular-polygons/sssssjwl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-rhombus-dissection-of-regular-polygons/sssssjwl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-rhombus-dissection-of-regular-polygons/sssssjwl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-rhombus-dissection-of-regular-polygons/sssssjwl"/>
      <lastmod>2026-11-02T18:06:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/investigating-rhombus-dissection-of-regular-polygons/sssssjwl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-rhombus-dissection-of-regular-polygons/sssssjwl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-rhombus-dissection-of-regular-polygons/sssssjwl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-rhombus-dissection-of-regular-polygons/sssssjwl"/>
      <lastmod>2026-11-02T18:06:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/box-volume-calculation-by-miguel-bayona/sssssjwy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/box-volume-calculation-by-miguel-bayona/sssssjwy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/box-volume-calculation-by-miguel-bayona/sssssjwy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/box-volume-calculation-by-miguel-bayona/sssssjwy"/>
      <lastmod>2026-11-02T00:06:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/box-volume-calculation-by-miguel-bayona/sssssjwy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/box-volume-calculation-by-miguel-bayona/sssssjwy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/box-volume-calculation-by-miguel-bayona/sssssjwy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/box-volume-calculation-by-miguel-bayona/sssssjwy"/>
      <lastmod>2026-11-02T00:06:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/part-part-whole-ratios-practice/sssssjwa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/part-part-whole-ratios-practice/sssssjwa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/part-part-whole-ratios-practice/sssssjwa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/part-part-whole-ratios-practice/sssssjwa"/>
      <lastmod>2026-11-01T23:07:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/part-part-whole-ratios-practice/sssssjwa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/part-part-whole-ratios-practice/sssssjwa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/part-part-whole-ratios-practice/sssssjwa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/part-part-whole-ratios-practice/sssssjwa"/>
      <lastmod>2026-11-01T23:07:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hidden-symmetry-in-regular-polygons/sssssjwc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hidden-symmetry-in-regular-polygons/sssssjwc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hidden-symmetry-in-regular-polygons/sssssjwc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hidden-symmetry-in-regular-polygons/sssssjwc"/>
      <lastmod>2026-11-02T16:31:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hidden-symmetry-in-regular-polygons/sssssjwc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hidden-symmetry-in-regular-polygons/sssssjwc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hidden-symmetry-in-regular-polygons/sssssjwc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hidden-symmetry-in-regular-polygons/sssssjwc"/>
      <lastmod>2026-11-02T16:31:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inequality-graphing-check/sssssjwr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inequality-graphing-check/sssssjwr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inequality-graphing-check/sssssjwr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inequality-graphing-check/sssssjwr"/>
      <lastmod>2026-11-02T16:37:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inequality-graphing-check/sssssjwr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inequality-graphing-check/sssssjwr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inequality-graphing-check/sssssjwr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inequality-graphing-check/sssssjwr"/>
      <lastmod>2026-11-02T16:37:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezium-point-symmetry-demo/sssssjwh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-point-symmetry-demo/sssssjwh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-point-symmetry-demo/sssssjwh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-point-symmetry-demo/sssssjwh"/>
      <lastmod>2026-11-02T00:46:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezium-point-symmetry-demo/sssssjwh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-point-symmetry-demo/sssssjwh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-point-symmetry-demo/sssssjwh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-point-symmetry-demo/sssssjwh"/>
      <lastmod>2026-11-02T00:46:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-and-volume-of-a-cylinder/sssssjwt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-and-volume-of-a-cylinder/sssssjwt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-and-volume-of-a-cylinder/sssssjwt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-and-volume-of-a-cylinder/sssssjwt"/>
      <lastmod>2026-11-02T18:18:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-and-volume-of-a-cylinder/sssssjwt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-and-volume-of-a-cylinder/sssssjwt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-and-volume-of-a-cylinder/sssssjwt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-and-volume-of-a-cylinder/sssssjwt"/>
      <lastmod>2026-11-02T18:18:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equivalent-ratios-table/sssssjwx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-ratios-table/sssssjwx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-ratios-table/sssssjwx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-ratios-table/sssssjwx"/>
      <lastmod>2026-11-02T13:27:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equivalent-ratios-table/sssssjwx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-ratios-table/sssssjwx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-ratios-table/sssssjwx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-ratios-table/sssssjwx"/>
      <lastmod>2026-11-02T13:27:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-7-7-1-practice-angle-relationships/sssssjwi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-7-1-practice-angle-relationships/sssssjwi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-7-1-practice-angle-relationships/sssssjwi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-7-1-practice-angle-relationships/sssssjwi"/>
      <lastmod>2026-11-01T22:57:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-7-7-1-practice-angle-relationships/sssssjwi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-7-1-practice-angle-relationships/sssssjwi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-7-1-practice-angle-relationships/sssssjwi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-7-1-practice-angle-relationships/sssssjwi"/>
      <lastmod>2026-11-01T22:57:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-in-exponential-function-graphs/sssssjwo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-in-exponential-function-graphs/sssssjwo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-in-exponential-function-graphs/sssssjwo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-in-exponential-function-graphs/sssssjwo"/>
      <lastmod>2026-11-02T16:38:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-in-exponential-function-graphs/sssssjwo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-in-exponential-function-graphs/sssssjwo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-in-exponential-function-graphs/sssssjwo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-in-exponential-function-graphs/sssssjwo"/>
      <lastmod>2026-11-02T16:38:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/horizontal-hyperbola-demonstration/sssssj6s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-hyperbola-demonstration/sssssj6s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-hyperbola-demonstration/sssssj6s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-hyperbola-demonstration/sssssj6s"/>
      <lastmod>2026-11-02T16:45:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/horizontal-hyperbola-demonstration/sssssj6s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-hyperbola-demonstration/sssssj6s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-hyperbola-demonstration/sssssj6s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-hyperbola-demonstration/sssssj6s"/>
      <lastmod>2026-11-02T16:45:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-a-parallelogram-and-cross-product/sssssj67</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-parallelogram-and-cross-product/sssssj67"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-parallelogram-and-cross-product/sssssj67"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-parallelogram-and-cross-product/sssssj67"/>
      <lastmod>2026-11-02T18:11:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-a-parallelogram-and-cross-product/sssssj67</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-parallelogram-and-cross-product/sssssj67"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-parallelogram-and-cross-product/sssssj67"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-parallelogram-and-cross-product/sssssj67"/>
      <lastmod>2026-11-02T18:11:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dome-4-symmetry-and-rotation-in-3d-construction/sssssj6n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dome-4-symmetry-and-rotation-in-3d-construction/sssssj6n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dome-4-symmetry-and-rotation-in-3d-construction/sssssj6n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dome-4-symmetry-and-rotation-in-3d-construction/sssssj6n"/>
      <lastmod>2026-11-01T20:45:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dome-4-symmetry-and-rotation-in-3d-construction/sssssj6n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dome-4-symmetry-and-rotation-in-3d-construction/sssssj6n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dome-4-symmetry-and-rotation-in-3d-construction/sssssj6n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dome-4-symmetry-and-rotation-in-3d-construction/sssssj6n"/>
      <lastmod>2026-11-01T20:45:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-inequalities/sssssj62</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-inequalities/sssssj62"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-inequalities/sssssj62"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-inequalities/sssssj62"/>
      <lastmod>2026-11-01T20:53:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-inequalities/sssssj62</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-inequalities/sssssj62"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-inequalities/sssssj62"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-inequalities/sssssj62"/>
      <lastmod>2026-11-01T20:53:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-the-circumcenter-with-bubble-method/sssssj6k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-the-circumcenter-with-bubble-method/sssssj6k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-the-circumcenter-with-bubble-method/sssssj6k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-the-circumcenter-with-bubble-method/sssssj6k"/>
      <lastmod>2026-11-01T20:40:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-the-circumcenter-with-bubble-method/sssssj6k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-the-circumcenter-with-bubble-method/sssssj6k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-the-circumcenter-with-bubble-method/sssssj6k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-the-circumcenter-with-bubble-method/sssssj6k"/>
      <lastmod>2026-11-01T20:40:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-unrolled-geometric-and-functional-visualization/sssssj6z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-unrolled-geometric-and-functional-visualization/sssssj6z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-unrolled-geometric-and-functional-visualization/sssssj6z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-unrolled-geometric-and-functional-visualization/sssssj6z"/>
      <lastmod>2026-11-02T02:25:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-unrolled-geometric-and-functional-visualization/sssssj6z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-unrolled-geometric-and-functional-visualization/sssssj6z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-unrolled-geometric-and-functional-visualization/sssssj6z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-unrolled-geometric-and-functional-visualization/sssssj6z"/>
      <lastmod>2026-11-02T02:25:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/filling-a-square-with-islamic-geometric-patterns/sssssj60</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/filling-a-square-with-islamic-geometric-patterns/sssssj60"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/filling-a-square-with-islamic-geometric-patterns/sssssj60"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/filling-a-square-with-islamic-geometric-patterns/sssssj60"/>
      <lastmod>2026-11-01T21:03:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/filling-a-square-with-islamic-geometric-patterns/sssssj60</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/filling-a-square-with-islamic-geometric-patterns/sssssj60"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/filling-a-square-with-islamic-geometric-patterns/sssssj60"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/filling-a-square-with-islamic-geometric-patterns/sssssj60"/>
      <lastmod>2026-11-01T21:03:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/piano-keys/sssssj6d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/piano-keys/sssssj6d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/piano-keys/sssssj6d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/piano-keys/sssssj6d"/>
      <lastmod>2026-11-01T23:31:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/piano-keys/sssssj6d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/piano-keys/sssssj6d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/piano-keys/sssssj6d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/piano-keys/sssssj6d"/>
      <lastmod>2026-11-01T23:31:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-rational-functions-with-asymptotes/sssssj6f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-rational-functions-with-asymptotes/sssssj6f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-rational-functions-with-asymptotes/sssssj6f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-rational-functions-with-asymptotes/sssssj6f"/>
      <lastmod>2026-11-02T08:35:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-rational-functions-with-asymptotes/sssssj6f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-rational-functions-with-asymptotes/sssssj6f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-rational-functions-with-asymptotes/sssssj6f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-rational-functions-with-asymptotes/sssssj6f"/>
      <lastmod>2026-11-02T08:35:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-geometric-construction/sssssj68</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-geometric-construction/sssssj68"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-geometric-construction/sssssj68"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-geometric-construction/sssssj68"/>
      <lastmod>2026-11-02T18:17:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-geometric-construction/sssssj68</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-geometric-construction/sssssj68"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-geometric-construction/sssssj68"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-geometric-construction/sssssj68"/>
      <lastmod>2026-11-02T18:17:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introducing-the-normal-distribution-using-hand-span/sssssj6u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introducing-the-normal-distribution-using-hand-span/sssssj6u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introducing-the-normal-distribution-using-hand-span/sssssj6u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introducing-the-normal-distribution-using-hand-span/sssssj6u"/>
      <lastmod>2026-11-02T18:10:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introducing-the-normal-distribution-using-hand-span/sssssj6u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introducing-the-normal-distribution-using-hand-span/sssssj6u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introducing-the-normal-distribution-using-hand-span/sssssj6u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introducing-the-normal-distribution-using-hand-span/sssssj6u"/>
      <lastmod>2026-11-02T18:10:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/histogram-with-frequency-polygon-example/sssssj65</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-with-frequency-polygon-example/sssssj65"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-with-frequency-polygon-example/sssssj65"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-with-frequency-polygon-example/sssssj65"/>
      <lastmod>2026-11-02T17:05:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/histogram-with-frequency-polygon-example/sssssj65</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-with-frequency-polygon-example/sssssj65"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-with-frequency-polygon-example/sssssj65"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-with-frequency-polygon-example/sssssj65"/>
      <lastmod>2026-11-02T17:05:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/central-cylindrical-projection/sssssj6b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/central-cylindrical-projection/sssssj6b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/central-cylindrical-projection/sssssj6b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/central-cylindrical-projection/sssssj6b"/>
      <lastmod>2026-11-01T20:19:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/central-cylindrical-projection/sssssj6b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/central-cylindrical-projection/sssssj6b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/central-cylindrical-projection/sssssj6b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/central-cylindrical-projection/sssssj6b"/>
      <lastmod>2026-11-01T20:19:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/part-whole-and-percentage-relationship/sssssj63</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/part-whole-and-percentage-relationship/sssssj63"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/part-whole-and-percentage-relationship/sssssj63"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/part-whole-and-percentage-relationship/sssssj63"/>
      <lastmod>2026-11-01T22:03:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/part-whole-and-percentage-relationship/sssssj63</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/part-whole-and-percentage-relationship/sssssj63"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/part-whole-and-percentage-relationship/sssssj63"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/part-whole-and-percentage-relationship/sssssj63"/>
      <lastmod>2026-11-01T22:03:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-by-mr-isbester/sssssj6q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-by-mr-isbester/sssssj6q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-by-mr-isbester/sssssj6q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-by-mr-isbester/sssssj6q"/>
      <lastmod>2026-11-02T03:05:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-by-mr-isbester/sssssj6q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-by-mr-isbester/sssssj6q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-by-mr-isbester/sssssj6q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-by-mr-isbester/sssssj6q"/>
      <lastmod>2026-11-02T03:05:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-way-tables-and-conditional-probability-dynamic-simulation/sssssj61</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-way-tables-and-conditional-probability-dynamic-simulation/sssssj61"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-way-tables-and-conditional-probability-dynamic-simulation/sssssj61"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-way-tables-and-conditional-probability-dynamic-simulation/sssssj61"/>
      <lastmod>2026-11-01T20:19:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-way-tables-and-conditional-probability-dynamic-simulation/sssssj61</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-way-tables-and-conditional-probability-dynamic-simulation/sssssj61"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-way-tables-and-conditional-probability-dynamic-simulation/sssssj61"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-way-tables-and-conditional-probability-dynamic-simulation/sssssj61"/>
      <lastmod>2026-11-01T20:19:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-surfaces/sssssj6m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-surfaces/sssssj6m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-surfaces/sssssj6m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-surfaces/sssssj6m"/>
      <lastmod>2026-11-01T19:34:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-surfaces/sssssj6m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-surfaces/sssssj6m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-surfaces/sssssj6m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-surfaces/sssssj6m"/>
      <lastmod>2026-11-01T19:34:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-representation-of-sum-of-cubes/sssssj6j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-representation-of-sum-of-cubes/sssssj6j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-representation-of-sum-of-cubes/sssssj6j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-representation-of-sum-of-cubes/sssssj6j"/>
      <lastmod>2026-11-02T06:44:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-representation-of-sum-of-cubes/sssssj6j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-representation-of-sum-of-cubes/sssssj6j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-representation-of-sum-of-cubes/sssssj6j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-representation-of-sum-of-cubes/sssssj6j"/>
      <lastmod>2026-11-02T06:44:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygon-construction/sssssj6p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-construction/sssssj6p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-construction/sssssj6p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-construction/sssssj6p"/>
      <lastmod>2026-11-02T08:54:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygon-construction/sssssj6p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-construction/sssssj6p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-construction/sssssj6p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-construction/sssssj6p"/>
      <lastmod>2026-11-02T08:54:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mappings-and-transformations/sssssj6w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mappings-and-transformations/sssssj6w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mappings-and-transformations/sssssj6w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mappings-and-transformations/sssssj6w"/>
      <lastmod>2026-11-01T23:29:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mappings-and-transformations/sssssj6w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mappings-and-transformations/sssssj6w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mappings-and-transformations/sssssj6w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mappings-and-transformations/sssssj6w"/>
      <lastmod>2026-11-01T23:29:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-a-parallelogram-dynamic-demonstration/sssssj66</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-parallelogram-dynamic-demonstration/sssssj66"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-parallelogram-dynamic-demonstration/sssssj66"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-parallelogram-dynamic-demonstration/sssssj66"/>
      <lastmod>2026-11-01T19:19:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-a-parallelogram-dynamic-demonstration/sssssj66</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-parallelogram-dynamic-demonstration/sssssj66"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-parallelogram-dynamic-demonstration/sssssj66"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-parallelogram-dynamic-demonstration/sssssj66"/>
      <lastmod>2026-11-01T19:19:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mysterious-relationship-of-angle-bisectors-in-any-concave-quadrilateral/sssssj6g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mysterious-relationship-of-angle-bisectors-in-any-concave-quadrilateral/sssssj6g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mysterious-relationship-of-angle-bisectors-in-any-concave-quadrilateral/sssssj6g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mysterious-relationship-of-angle-bisectors-in-any-concave-quadrilateral/sssssj6g"/>
      <lastmod>2026-11-02T18:56:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mysterious-relationship-of-angle-bisectors-in-any-concave-quadrilateral/sssssj6g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mysterious-relationship-of-angle-bisectors-in-any-concave-quadrilateral/sssssj6g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mysterious-relationship-of-angle-bisectors-in-any-concave-quadrilateral/sssssj6g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mysterious-relationship-of-angle-bisectors-in-any-concave-quadrilateral/sssssj6g"/>
      <lastmod>2026-11-02T18:56:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/snub-operation-from-cube-to-octahedron-rhombicuboctahedron-and-snub-cube/sssssj69</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/snub-operation-from-cube-to-octahedron-rhombicuboctahedron-and-snub-cube/sssssj69"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/snub-operation-from-cube-to-octahedron-rhombicuboctahedron-and-snub-cube/sssssj69"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/snub-operation-from-cube-to-octahedron-rhombicuboctahedron-and-snub-cube/sssssj69"/>
      <lastmod>2026-11-01T19:15:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/snub-operation-from-cube-to-octahedron-rhombicuboctahedron-and-snub-cube/sssssj69</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/snub-operation-from-cube-to-octahedron-rhombicuboctahedron-and-snub-cube/sssssj69"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/snub-operation-from-cube-to-octahedron-rhombicuboctahedron-and-snub-cube/sssssj69"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/snub-operation-from-cube-to-octahedron-rhombicuboctahedron-and-snub-cube/sssssj69"/>
      <lastmod>2026-11-01T19:15:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/very-weird-functions-example/sssssj6e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/very-weird-functions-example/sssssj6e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/very-weird-functions-example/sssssj6e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/very-weird-functions-example/sssssj6e"/>
      <lastmod>2026-11-02T02:28:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/very-weird-functions-example/sssssj6e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/very-weird-functions-example/sssssj6e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/very-weird-functions-example/sssssj6e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/very-weird-functions-example/sssssj6e"/>
      <lastmod>2026-11-02T02:28:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inscribing-a-rhombus-into-a-parallelogram-classic-construction/sssssj6v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inscribing-a-rhombus-into-a-parallelogram-classic-construction/sssssj6v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inscribing-a-rhombus-into-a-parallelogram-classic-construction/sssssj6v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inscribing-a-rhombus-into-a-parallelogram-classic-construction/sssssj6v"/>
      <lastmod>2026-11-02T17:08:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inscribing-a-rhombus-into-a-parallelogram-classic-construction/sssssj6v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inscribing-a-rhombus-into-a-parallelogram-classic-construction/sssssj6v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inscribing-a-rhombus-into-a-parallelogram-classic-construction/sssssj6v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inscribing-a-rhombus-into-a-parallelogram-classic-construction/sssssj6v"/>
      <lastmod>2026-11-02T17:08:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-sine-and-cosine/sssssj64</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-sine-and-cosine/sssssj64"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-sine-and-cosine/sssssj64"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-sine-and-cosine/sssssj64"/>
      <lastmod>2026-11-01T23:40:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-of-sine-and-cosine/sssssj64</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-sine-and-cosine/sssssj64"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-sine-and-cosine/sssssj64"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-sine-and-cosine/sssssj64"/>
      <lastmod>2026-11-01T23:40:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/closest-point-construction/sssssj6l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/closest-point-construction/sssssj6l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/closest-point-construction/sssssj6l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/closest-point-construction/sssssj6l"/>
      <lastmod>2026-11-01T21:16:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/closest-point-construction/sssssj6l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/closest-point-construction/sssssj6l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/closest-point-construction/sssssj6l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/closest-point-construction/sssssj6l"/>
      <lastmod>2026-11-01T21:16:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-regression-inference-1/sssssj6y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-regression-inference-1/sssssj6y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-regression-inference-1/sssssj6y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-regression-inference-1/sssssj6y"/>
      <lastmod>2026-11-01T21:38:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-regression-inference-1/sssssj6y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-regression-inference-1/sssssj6y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-regression-inference-1/sssssj6y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-regression-inference-1/sssssj6y"/>
      <lastmod>2026-11-01T21:38:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exact-differential-equation-solver/sssssj6a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exact-differential-equation-solver/sssssj6a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exact-differential-equation-solver/sssssj6a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exact-differential-equation-solver/sssssj6a"/>
      <lastmod>2026-11-01T21:29:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exact-differential-equation-solver/sssssj6a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exact-differential-equation-solver/sssssj6a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exact-differential-equation-solver/sssssj6a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exact-differential-equation-solver/sssssj6a"/>
      <lastmod>2026-11-01T21:29:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-6-4-1-practice-size-of-divisor-and-quotient/sssssj6c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-4-1-practice-size-of-divisor-and-quotient/sssssj6c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-4-1-practice-size-of-divisor-and-quotient/sssssj6c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-4-1-practice-size-of-divisor-and-quotient/sssssj6c"/>
      <lastmod>2026-11-01T23:05:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-6-4-1-practice-size-of-divisor-and-quotient/sssssj6c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-4-1-practice-size-of-divisor-and-quotient/sssssj6c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-4-1-practice-size-of-divisor-and-quotient/sssssj6c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-4-1-practice-size-of-divisor-and-quotient/sssssj6c"/>
      <lastmod>2026-11-01T23:05:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/between-ness-with-rational-numbers-interactive-judgment-practice/sssssj6r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/between-ness-with-rational-numbers-interactive-judgment-practice/sssssj6r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/between-ness-with-rational-numbers-interactive-judgment-practice/sssssj6r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/between-ness-with-rational-numbers-interactive-judgment-practice/sssssj6r"/>
      <lastmod>2026-11-02T18:47:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/between-ness-with-rational-numbers-interactive-judgment-practice/sssssj6r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/between-ness-with-rational-numbers-interactive-judgment-practice/sssssj6r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/between-ness-with-rational-numbers-interactive-judgment-practice/sssssj6r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/between-ness-with-rational-numbers-interactive-judgment-practice/sssssj6r"/>
      <lastmod>2026-11-02T18:47:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prisms-with-spreadsheet/sssssj6h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prisms-with-spreadsheet/sssssj6h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prisms-with-spreadsheet/sssssj6h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prisms-with-spreadsheet/sssssj6h"/>
      <lastmod>2026-11-02T08:35:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prisms-with-spreadsheet/sssssj6h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prisms-with-spreadsheet/sssssj6h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prisms-with-spreadsheet/sssssj6h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prisms-with-spreadsheet/sssssj6h"/>
      <lastmod>2026-11-02T08:35:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/andy-murray-logo-vector-geometry-construction/sssssj6t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/andy-murray-logo-vector-geometry-construction/sssssj6t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/andy-murray-logo-vector-geometry-construction/sssssj6t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/andy-murray-logo-vector-geometry-construction/sssssj6t"/>
      <lastmod>2026-11-01T20:41:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/andy-murray-logo-vector-geometry-construction/sssssj6t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/andy-murray-logo-vector-geometry-construction/sssssj6t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/andy-murray-logo-vector-geometry-construction/sssssj6t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/andy-murray-logo-vector-geometry-construction/sssssj6t"/>
      <lastmod>2026-11-01T20:41:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inequality-generator/sssssj6x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inequality-generator/sssssj6x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inequality-generator/sssssj6x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inequality-generator/sssssj6x"/>
      <lastmod>2026-11-02T16:55:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inequality-generator/sssssj6x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inequality-generator/sssssj6x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inequality-generator/sssssj6x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inequality-generator/sssssj6x"/>
      <lastmod>2026-11-02T16:55:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/factoring-to-find-roots/sssssj6i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factoring-to-find-roots/sssssj6i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factoring-to-find-roots/sssssj6i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factoring-to-find-roots/sssssj6i"/>
      <lastmod>2026-11-02T09:30:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/factoring-to-find-roots/sssssj6i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factoring-to-find-roots/sssssj6i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factoring-to-find-roots/sssssj6i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factoring-to-find-roots/sssssj6i"/>
      <lastmod>2026-11-02T09:30:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-normal-distributions/sssssj6o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-normal-distributions/sssssj6o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-normal-distributions/sssssj6o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-normal-distributions/sssssj6o"/>
      <lastmod>2026-11-02T18:42:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-normal-distributions/sssssj6o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-normal-distributions/sssssj6o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-normal-distributions/sssssj6o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-normal-distributions/sssssj6o"/>
      <lastmod>2026-11-02T18:42:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-intersections-of-two-graphs/sssssjgs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-intersections-of-two-graphs/sssssjgs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-intersections-of-two-graphs/sssssjgs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-intersections-of-two-graphs/sssssjgs"/>
      <lastmod>2026-11-02T15:18:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-intersections-of-two-graphs/sssssjgs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-intersections-of-two-graphs/sssssjgs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-intersections-of-two-graphs/sssssjgs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-intersections-of-two-graphs/sssssjgs"/>
      <lastmod>2026-11-02T15:18:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-homotopy/sssssjg7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-homotopy/sssssjg7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-homotopy/sssssjg7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-homotopy/sssssjg7"/>
      <lastmod>2026-11-02T18:27:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-homotopy/sssssjg7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-homotopy/sssssjg7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-homotopy/sssssjg7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-homotopy/sssssjg7"/>
      <lastmod>2026-11-02T18:27:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simple-lissajous-curve/sssssjgn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-lissajous-curve/sssssjgn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-lissajous-curve/sssssjgn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-lissajous-curve/sssssjgn"/>
      <lastmod>2026-11-01T23:28:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simple-lissajous-curve/sssssjgn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-lissajous-curve/sssssjgn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-lissajous-curve/sssssjgn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-lissajous-curve/sssssjgn"/>
      <lastmod>2026-11-01T23:28:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/defining-a-parabola-in-standard-form/sssssjg2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/defining-a-parabola-in-standard-form/sssssjg2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/defining-a-parabola-in-standard-form/sssssjg2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/defining-a-parabola-in-standard-form/sssssjg2"/>
      <lastmod>2026-11-01T23:29:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/defining-a-parabola-in-standard-form/sssssjg2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/defining-a-parabola-in-standard-form/sssssjg2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/defining-a-parabola-in-standard-form/sssssjg2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/defining-a-parabola-in-standard-form/sssssjg2"/>
      <lastmod>2026-11-01T23:29:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/create-a-scatter-plot/sssssjgk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-a-scatter-plot/sssssjgk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-a-scatter-plot/sssssjgk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-a-scatter-plot/sssssjgk"/>
      <lastmod>2026-11-01T22:06:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/create-a-scatter-plot/sssssjgk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-a-scatter-plot/sssssjgk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-a-scatter-plot/sssssjgk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-a-scatter-plot/sssssjgk"/>
      <lastmod>2026-11-01T22:06:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modifiable-solid-regular-octagonal-cross-sections-parallel-to-yaxis/sssssjgz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modifiable-solid-regular-octagonal-cross-sections-parallel-to-yaxis/sssssjgz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modifiable-solid-regular-octagonal-cross-sections-parallel-to-yaxis/sssssjgz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modifiable-solid-regular-octagonal-cross-sections-parallel-to-yaxis/sssssjgz"/>
      <lastmod>2026-11-02T02:27:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modifiable-solid-regular-octagonal-cross-sections-parallel-to-yaxis/sssssjgz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modifiable-solid-regular-octagonal-cross-sections-parallel-to-yaxis/sssssjgz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modifiable-solid-regular-octagonal-cross-sections-parallel-to-yaxis/sssssjgz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modifiable-solid-regular-octagonal-cross-sections-parallel-to-yaxis/sssssjgz"/>
      <lastmod>2026-11-02T02:27:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/partial-derivative-demo-by-katherine-hall/sssssjg0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-derivative-demo-by-katherine-hall/sssssjg0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-derivative-demo-by-katherine-hall/sssssjg0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-derivative-demo-by-katherine-hall/sssssjg0"/>
      <lastmod>2026-11-02T09:27:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/partial-derivative-demo-by-katherine-hall/sssssjg0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-derivative-demo-by-katherine-hall/sssssjg0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-derivative-demo-by-katherine-hall/sssssjg0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-derivative-demo-by-katherine-hall/sssssjg0"/>
      <lastmod>2026-11-02T09:27:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-cone-radius-constant/sssssjgd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone-radius-constant/sssssjgd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cone-radius-constant/sssssjgd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cone-radius-constant/sssssjgd"/>
      <lastmod>2026-11-01T21:43:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-a-cone-radius-constant/sssssjgd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone-radius-constant/sssssjgd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cone-radius-constant/sssssjgd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cone-radius-constant/sssssjgd"/>
      <lastmod>2026-11-01T21:43:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-with-unit-circle-complex-numbers-logarithmic-functions-and-sequences/sssssjgf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-with-unit-circle-complex-numbers-logarithmic-functions-and-sequences/sssssjgf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-with-unit-circle-complex-numbers-logarithmic-functions-and-sequences/sssssjgf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-with-unit-circle-complex-numbers-logarithmic-functions-and-sequences/sssssjgf"/>
      <lastmod>2026-11-02T18:36:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-with-unit-circle-complex-numbers-logarithmic-functions-and-sequences/sssssjgf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-with-unit-circle-complex-numbers-logarithmic-functions-and-sequences/sssssjgf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-with-unit-circle-complex-numbers-logarithmic-functions-and-sequences/sssssjgf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-with-unit-circle-complex-numbers-logarithmic-functions-and-sequences/sssssjgf"/>
      <lastmod>2026-11-02T18:36:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoid-midpoints-form-a-rhombus-coordinate-geometry-proof/sssssjg8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-midpoints-form-a-rhombus-coordinate-geometry-proof/sssssjg8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-midpoints-form-a-rhombus-coordinate-geometry-proof/sssssjg8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-midpoints-form-a-rhombus-coordinate-geometry-proof/sssssjg8"/>
      <lastmod>2026-11-02T07:07:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoid-midpoints-form-a-rhombus-coordinate-geometry-proof/sssssjg8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-midpoints-form-a-rhombus-coordinate-geometry-proof/sssssjg8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-midpoints-form-a-rhombus-coordinate-geometry-proof/sssssjg8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-midpoints-form-a-rhombus-coordinate-geometry-proof/sssssjg8"/>
      <lastmod>2026-11-02T07:07:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bisect-a-line-segment-by-cisdaustinlee/sssssjgu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bisect-a-line-segment-by-cisdaustinlee/sssssjgu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bisect-a-line-segment-by-cisdaustinlee/sssssjgu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bisect-a-line-segment-by-cisdaustinlee/sssssjgu"/>
      <lastmod>2026-11-02T00:48:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bisect-a-line-segment-by-cisdaustinlee/sssssjgu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bisect-a-line-segment-by-cisdaustinlee/sssssjgu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bisect-a-line-segment-by-cisdaustinlee/sssssjgu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bisect-a-line-segment-by-cisdaustinlee/sssssjgu"/>
      <lastmod>2026-11-02T00:48:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/discriminant-and-its-effects-on-roots/sssssjg5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discriminant-and-its-effects-on-roots/sssssjg5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discriminant-and-its-effects-on-roots/sssssjg5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discriminant-and-its-effects-on-roots/sssssjg5"/>
      <lastmod>2026-11-01T21:12:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/discriminant-and-its-effects-on-roots/sssssjg5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discriminant-and-its-effects-on-roots/sssssjg5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discriminant-and-its-effects-on-roots/sssssjg5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discriminant-and-its-effects-on-roots/sssssjg5"/>
      <lastmod>2026-11-01T21:12:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hannah-ger-geometric-exploration-of-polygon-midpoints-and-centroids/sssssjgb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hannah-ger-geometric-exploration-of-polygon-midpoints-and-centroids/sssssjgb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hannah-ger-geometric-exploration-of-polygon-midpoints-and-centroids/sssssjgb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hannah-ger-geometric-exploration-of-polygon-midpoints-and-centroids/sssssjgb"/>
      <lastmod>2026-11-01T20:56:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hannah-ger-geometric-exploration-of-polygon-midpoints-and-centroids/sssssjgb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hannah-ger-geometric-exploration-of-polygon-midpoints-and-centroids/sssssjgb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hannah-ger-geometric-exploration-of-polygon-midpoints-and-centroids/sssssjgb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hannah-ger-geometric-exploration-of-polygon-midpoints-and-centroids/sssssjgb"/>
      <lastmod>2026-11-01T20:56:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trading-places-dynamic-geometry-of-circles-and-polygons/sssssjg3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trading-places-dynamic-geometry-of-circles-and-polygons/sssssjg3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trading-places-dynamic-geometry-of-circles-and-polygons/sssssjg3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trading-places-dynamic-geometry-of-circles-and-polygons/sssssjg3"/>
      <lastmod>2026-11-02T18:08:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trading-places-dynamic-geometry-of-circles-and-polygons/sssssjg3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trading-places-dynamic-geometry-of-circles-and-polygons/sssssjg3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trading-places-dynamic-geometry-of-circles-and-polygons/sssssjg3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trading-places-dynamic-geometry-of-circles-and-polygons/sssssjg3"/>
      <lastmod>2026-11-02T18:08:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/domain-and-range-quick-quiz-and-example/sssssjgq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/domain-and-range-quick-quiz-and-example/sssssjgq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/domain-and-range-quick-quiz-and-example/sssssjgq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/domain-and-range-quick-quiz-and-example/sssssjgq"/>
      <lastmod>2026-11-01T21:13:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/domain-and-range-quick-quiz-and-example/sssssjgq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/domain-and-range-quick-quiz-and-example/sssssjgq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/domain-and-range-quick-quiz-and-example/sssssjgq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/domain-and-range-quick-quiz-and-example/sssssjgq"/>
      <lastmod>2026-11-01T21:13:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-demonstration-of-exponential-growth-decay/sssssjg1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-exponential-growth-decay/sssssjg1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-exponential-growth-decay/sssssjg1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-exponential-growth-decay/sssssjg1"/>
      <lastmod>2026-11-01T19:00:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-demonstration-of-exponential-growth-decay/sssssjg1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-exponential-growth-decay/sssssjg1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-exponential-growth-decay/sssssjg1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-exponential-growth-decay/sssssjg1"/>
      <lastmod>2026-11-01T19:00:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-of-revolution-from-2d-function-with-ar/sssssjgm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-from-2d-function-with-ar/sssssjgm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-from-2d-function-with-ar/sssssjgm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-from-2d-function-with-ar/sssssjgm"/>
      <lastmod>2026-11-02T00:06:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-of-revolution-from-2d-function-with-ar/sssssjgm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-from-2d-function-with-ar/sssssjgm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-from-2d-function-with-ar/sssssjgm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-from-2d-function-with-ar/sssssjgm"/>
      <lastmod>2026-11-02T00:06:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-diagonal-construction-example/sssssjgj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-diagonal-construction-example/sssssjgj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-diagonal-construction-example/sssssjgj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-diagonal-construction-example/sssssjgj"/>
      <lastmod>2026-11-02T11:57:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-diagonal-construction-example/sssssjgj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-diagonal-construction-example/sssssjgj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-diagonal-construction-example/sssssjgj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-diagonal-construction-example/sssssjgj"/>
      <lastmod>2026-11-02T11:57:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-line-to-a-curve/sssssjgp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-line-to-a-curve/sssssjgp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-line-to-a-curve/sssssjgp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-line-to-a-curve/sssssjgp"/>
      <lastmod>2026-11-02T18:41:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-line-to-a-curve/sssssjgp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-line-to-a-curve/sssssjgp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-line-to-a-curve/sssssjgp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-line-to-a-curve/sssssjgp"/>
      <lastmod>2026-11-02T18:41:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-inscribed-in-a-circle-by-edward-knote/sssssjgw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-inscribed-in-a-circle-by-edward-knote/sssssjgw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-inscribed-in-a-circle-by-edward-knote/sssssjgw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-inscribed-in-a-circle-by-edward-knote/sssssjgw"/>
      <lastmod>2026-11-02T12:05:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-inscribed-in-a-circle-by-edward-knote/sssssjgw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-inscribed-in-a-circle-by-edward-knote/sssssjgw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-inscribed-in-a-circle-by-edward-knote/sssssjgw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-inscribed-in-a-circle-by-edward-knote/sssssjgw"/>
      <lastmod>2026-11-02T12:05:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/loupe-iii/sssssjg6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/loupe-iii/sssssjg6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/loupe-iii/sssssjg6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/loupe-iii/sssssjg6"/>
      <lastmod>2026-11-02T15:52:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/loupe-iii/sssssjg6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/loupe-iii/sssssjg6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/loupe-iii/sssssjg6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/loupe-iii/sssssjg6"/>
      <lastmod>2026-11-02T15:52:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-transformations-review/sssssjgg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-review/sssssjgg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-review/sssssjgg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-review/sssssjgg"/>
      <lastmod>2026-11-01T21:29:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-transformations-review/sssssjgg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-review/sssssjgg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-review/sssssjgg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-review/sssssjgg"/>
      <lastmod>2026-11-01T21:29:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-proof-construction/sssssjg9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-proof-construction/sssssjg9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-proof-construction/sssssjg9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-proof-construction/sssssjg9"/>
      <lastmod>2026-11-02T16:40:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-proof-construction/sssssjg9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-proof-construction/sssssjg9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-proof-construction/sssssjg9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-proof-construction/sssssjg9"/>
      <lastmod>2026-11-02T16:40:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-equivalent-fractions/sssssjge</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-equivalent-fractions/sssssjge"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-equivalent-fractions/sssssjge"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-equivalent-fractions/sssssjge"/>
      <lastmod>2026-11-01T20:42:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-equivalent-fractions/sssssjge</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-equivalent-fractions/sssssjge"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-equivalent-fractions/sssssjge"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-equivalent-fractions/sssssjge"/>
      <lastmod>2026-11-01T20:42:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/matrix-order-exercise/sssssjgv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-order-exercise/sssssjgv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-order-exercise/sssssjgv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-order-exercise/sssssjgv"/>
      <lastmod>2026-11-01T23:11:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/matrix-order-exercise/sssssjgv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-order-exercise/sssssjgv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-order-exercise/sssssjgv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-order-exercise/sssssjgv"/>
      <lastmod>2026-11-01T23:11:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-addition-and-subtraction-game-by-maertens-j/sssssjg4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-addition-and-subtraction-game-by-maertens-j/sssssjg4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-addition-and-subtraction-game-by-maertens-j/sssssjg4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-addition-and-subtraction-game-by-maertens-j/sssssjg4"/>
      <lastmod>2026-11-01T21:43:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-addition-and-subtraction-game-by-maertens-j/sssssjg4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-addition-and-subtraction-game-by-maertens-j/sssssjg4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-addition-and-subtraction-game-by-maertens-j/sssssjg4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-addition-and-subtraction-game-by-maertens-j/sssssjg4"/>
      <lastmod>2026-11-01T21:43:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-flower-function-demonstration/sssssjgl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-flower-function-demonstration/sssssjgl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-flower-function-demonstration/sssssjgl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-flower-function-demonstration/sssssjgl"/>
      <lastmod>2026-11-01T23:38:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-flower-function-demonstration/sssssjgl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-flower-function-demonstration/sssssjgl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-flower-function-demonstration/sssssjgl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-flower-function-demonstration/sssssjgl"/>
      <lastmod>2026-11-01T23:38:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a-new-interpretation-of-a-over-b-with-geogebra/sssssjgy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-new-interpretation-of-a-over-b-with-geogebra/sssssjgy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-new-interpretation-of-a-over-b-with-geogebra/sssssjgy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-new-interpretation-of-a-over-b-with-geogebra/sssssjgy"/>
      <lastmod>2026-11-01T20:17:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a-new-interpretation-of-a-over-b-with-geogebra/sssssjgy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-new-interpretation-of-a-over-b-with-geogebra/sssssjgy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-new-interpretation-of-a-over-b-with-geogebra/sssssjgy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-new-interpretation-of-a-over-b-with-geogebra/sssssjgy"/>
      <lastmod>2026-11-01T20:17:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simple-polar-graph/sssssjga</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-polar-graph/sssssjga"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-polar-graph/sssssjga"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-polar-graph/sssssjga"/>
      <lastmod>2026-11-01T23:28:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simple-polar-graph/sssssjga</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-polar-graph/sssssjga"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-polar-graph/sssssjga"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-polar-graph/sssssjga"/>
      <lastmod>2026-11-01T23:28:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/counters-for-lz-2-cosine-multiplication-sequence-on-a-cylinder/sssssjgc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/counters-for-lz-2-cosine-multiplication-sequence-on-a-cylinder/sssssjgc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/counters-for-lz-2-cosine-multiplication-sequence-on-a-cylinder/sssssjgc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/counters-for-lz-2-cosine-multiplication-sequence-on-a-cylinder/sssssjgc"/>
      <lastmod>2026-11-02T18:53:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/counters-for-lz-2-cosine-multiplication-sequence-on-a-cylinder/sssssjgc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/counters-for-lz-2-cosine-multiplication-sequence-on-a-cylinder/sssssjgc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/counters-for-lz-2-cosine-multiplication-sequence-on-a-cylinder/sssssjgc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/counters-for-lz-2-cosine-multiplication-sequence-on-a-cylinder/sssssjgc"/>
      <lastmod>2026-11-02T18:53:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygons/sssssjgr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygons/sssssjgr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygons/sssssjgr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygons/sssssjgr"/>
      <lastmod>2026-11-01T20:42:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygons/sssssjgr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygons/sssssjgr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygons/sssssjgr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygons/sssssjgr"/>
      <lastmod>2026-11-01T20:42:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perimeter-exploration-of-rectangles/sssssjgh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-exploration-of-rectangles/sssssjgh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-exploration-of-rectangles/sssssjgh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-exploration-of-rectangles/sssssjgh"/>
      <lastmod>2026-11-01T20:48:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perimeter-exploration-of-rectangles/sssssjgh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-exploration-of-rectangles/sssssjgh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-exploration-of-rectangles/sssssjgh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-exploration-of-rectangles/sssssjgh"/>
      <lastmod>2026-11-01T20:48:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/focus-of-a-parabola-geometric-construction-and-properties/sssssjgt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/focus-of-a-parabola-geometric-construction-and-properties/sssssjgt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/focus-of-a-parabola-geometric-construction-and-properties/sssssjgt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/focus-of-a-parabola-geometric-construction-and-properties/sssssjgt"/>
      <lastmod>2026-11-01T19:27:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/focus-of-a-parabola-geometric-construction-and-properties/sssssjgt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/focus-of-a-parabola-geometric-construction-and-properties/sssssjgt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/focus-of-a-parabola-geometric-construction-and-properties/sssssjgt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/focus-of-a-parabola-geometric-construction-and-properties/sssssjgt"/>
      <lastmod>2026-11-01T19:27:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pattern-of-maximum-sum-of-mutual-distances-on-a-sphere-with-increasing-number-of/sssssjgx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pattern-of-maximum-sum-of-mutual-distances-on-a-sphere-with-increasing-number-of/sssssjgx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pattern-of-maximum-sum-of-mutual-distances-on-a-sphere-with-increasing-number-of/sssssjgx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pattern-of-maximum-sum-of-mutual-distances-on-a-sphere-with-increasing-number-of/sssssjgx"/>
      <lastmod>2026-11-02T16:30:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pattern-of-maximum-sum-of-mutual-distances-on-a-sphere-with-increasing-number-of/sssssjgx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pattern-of-maximum-sum-of-mutual-distances-on-a-sphere-with-increasing-number-of/sssssjgx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pattern-of-maximum-sum-of-mutual-distances-on-a-sphere-with-increasing-number-of/sssssjgx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pattern-of-maximum-sum-of-mutual-distances-on-a-sphere-with-increasing-number-of/sssssjgx"/>
      <lastmod>2026-11-02T16:30:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a-surface-display/sssssjgi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-surface-display/sssssjgi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-surface-display/sssssjgi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-surface-display/sssssjgi"/>
      <lastmod>2026-11-02T09:29:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a-surface-display/sssssjgi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-surface-display/sssssjgi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-surface-display/sssssjgi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-surface-display/sssssjgi"/>
      <lastmod>2026-11-02T09:29:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/max-bill-geometric-construction-by-mihaela-git/sssssjgo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/max-bill-geometric-construction-by-mihaela-git/sssssjgo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/max-bill-geometric-construction-by-mihaela-git/sssssjgo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/max-bill-geometric-construction-by-mihaela-git/sssssjgo"/>
      <lastmod>2026-11-02T09:51:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/max-bill-geometric-construction-by-mihaela-git/sssssjgo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/max-bill-geometric-construction-by-mihaela-git/sssssjgo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/max-bill-geometric-construction-by-mihaela-git/sssssjgo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/max-bill-geometric-construction-by-mihaela-git/sssssjgo"/>
      <lastmod>2026-11-02T09:51:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pie-chart-and-quadratic-function-interaction-demo/sssssj9s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pie-chart-and-quadratic-function-interaction-demo/sssssj9s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pie-chart-and-quadratic-function-interaction-demo/sssssj9s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pie-chart-and-quadratic-function-interaction-demo/sssssj9s"/>
      <lastmod>2026-11-02T18:20:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pie-chart-and-quadratic-function-interaction-demo/sssssj9s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pie-chart-and-quadratic-function-interaction-demo/sssssj9s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pie-chart-and-quadratic-function-interaction-demo/sssssj9s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pie-chart-and-quadratic-function-interaction-demo/sssssj9s"/>
      <lastmod>2026-11-02T18:20:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-a-rhombus-by-shanlee/sssssj97</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-rhombus-by-shanlee/sssssj97"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-rhombus-by-shanlee/sssssj97"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-rhombus-by-shanlee/sssssj97"/>
      <lastmod>2026-11-01T23:40:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-a-rhombus-by-shanlee/sssssj97</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-rhombus-by-shanlee/sssssj97"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-rhombus-by-shanlee/sssssj97"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-rhombus-by-shanlee/sssssj97"/>
      <lastmod>2026-11-01T23:40:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/standing-on-a-floor/sssssj9n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standing-on-a-floor/sssssj9n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standing-on-a-floor/sssssj9n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standing-on-a-floor/sssssj9n"/>
      <lastmod>2026-11-02T13:18:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/standing-on-a-floor/sssssj9n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standing-on-a-floor/sssssj9n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standing-on-a-floor/sssssj9n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standing-on-a-floor/sssssj9n"/>
      <lastmod>2026-11-02T13:18:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-inequalities-with-geometric-constructions/sssssj92</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-inequalities-with-geometric-constructions/sssssj92"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-inequalities-with-geometric-constructions/sssssj92"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-inequalities-with-geometric-constructions/sssssj92"/>
      <lastmod>2026-11-02T18:55:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-inequalities-with-geometric-constructions/sssssj92</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-inequalities-with-geometric-constructions/sssssj92"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-inequalities-with-geometric-constructions/sssssj92"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-inequalities-with-geometric-constructions/sssssj92"/>
      <lastmod>2026-11-02T18:55:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spherical-coordinates-by-mike-martinez/sssssj9k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-coordinates-by-mike-martinez/sssssj9k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-coordinates-by-mike-martinez/sssssj9k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-coordinates-by-mike-martinez/sssssj9k"/>
      <lastmod>2026-11-01T23:12:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spherical-coordinates-by-mike-martinez/sssssj9k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-coordinates-by-mike-martinez/sssssj9k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-coordinates-by-mike-martinez/sssssj9k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-coordinates-by-mike-martinez/sssssj9k"/>
      <lastmod>2026-11-01T23:12:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/qr3-01-xt1-area-model/sssssj9z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/qr3-01-xt1-area-model/sssssj9z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/qr3-01-xt1-area-model/sssssj9z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/qr3-01-xt1-area-model/sssssj9z"/>
      <lastmod>2026-11-01T23:59:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/qr3-01-xt1-area-model/sssssj9z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/qr3-01-xt1-area-model/sssssj9z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/qr3-01-xt1-area-model/sssssj9z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/qr3-01-xt1-area-model/sssssj9z"/>
      <lastmod>2026-11-01T23:59:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflective-properties-of-parabolas/sssssj90</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflective-properties-of-parabolas/sssssj90"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflective-properties-of-parabolas/sssssj90"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflective-properties-of-parabolas/sssssj90"/>
      <lastmod>2026-11-02T15:13:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflective-properties-of-parabolas/sssssj90</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflective-properties-of-parabolas/sssssj90"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflective-properties-of-parabolas/sssssj90"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflective-properties-of-parabolas/sssssj90"/>
      <lastmod>2026-11-02T15:13:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstrating-linear-equations/sssssj9d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-linear-equations/sssssj9d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-linear-equations/sssssj9d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-linear-equations/sssssj9d"/>
      <lastmod>2026-11-02T18:45:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstrating-linear-equations/sssssj9d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-linear-equations/sssssj9d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-linear-equations/sssssj9d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-linear-equations/sssssj9d"/>
      <lastmod>2026-11-02T18:45:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-limits-demo-sin-t-t-and-1-cos-t-t/sssssj9f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-limits-demo-sin-t-t-and-1-cos-t-t/sssssj9f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-limits-demo-sin-t-t-and-1-cos-t-t/sssssj9f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-limits-demo-sin-t-t-and-1-cos-t-t/sssssj9f"/>
      <lastmod>2026-11-01T21:31:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-limits-demo-sin-t-t-and-1-cos-t-t/sssssj9f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-limits-demo-sin-t-t-and-1-cos-t-t/sssssj9f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-limits-demo-sin-t-t-and-1-cos-t-t/sssssj9f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-limits-demo-sin-t-t-and-1-cos-t-t/sssssj9f"/>
      <lastmod>2026-11-01T21:31:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/decimal-addition-example-show-12-6-units-0-1-units/sssssj98</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-addition-example-show-12-6-units-0-1-units/sssssj98"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-addition-example-show-12-6-units-0-1-units/sssssj98"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-addition-example-show-12-6-units-0-1-units/sssssj98"/>
      <lastmod>2026-11-02T09:35:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/decimal-addition-example-show-12-6-units-0-1-units/sssssj98</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-addition-example-show-12-6-units-0-1-units/sssssj98"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-addition-example-show-12-6-units-0-1-units/sssssj98"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-addition-example-show-12-6-units-0-1-units/sssssj98"/>
      <lastmod>2026-11-02T09:35:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-3d-points/sssssj9u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-3d-points/sssssj9u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-3d-points/sssssj9u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-3d-points/sssssj9u"/>
      <lastmod>2026-11-02T17:03:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-3d-points/sssssj9u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-3d-points/sssssj9u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-3d-points/sssssj9u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-3d-points/sssssj9u"/>
      <lastmod>2026-11-02T17:03:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-function-domain-restriction/sssssj95</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-function-domain-restriction/sssssj95"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-function-domain-restriction/sssssj95"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-function-domain-restriction/sssssj95"/>
      <lastmod>2026-11-02T17:17:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-function-domain-restriction/sssssj95</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-function-domain-restriction/sssssj95"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-function-domain-restriction/sssssj95"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-function-domain-restriction/sssssj95"/>
      <lastmod>2026-11-02T17:17:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangular-prism-construction/sssssj9b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-prism-construction/sssssj9b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-prism-construction/sssssj9b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-prism-construction/sssssj9b"/>
      <lastmod>2026-11-01T23:46:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangular-prism-construction/sssssj9b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-prism-construction/sssssj9b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-prism-construction/sssssj9b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-prism-construction/sssssj9b"/>
      <lastmod>2026-11-01T23:46:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-rule-demonstration-by-mrspashett/sssssj93</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-rule-demonstration-by-mrspashett/sssssj93"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-rule-demonstration-by-mrspashett/sssssj93"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-rule-demonstration-by-mrspashett/sssssj93"/>
      <lastmod>2026-11-02T15:38:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-rule-demonstration-by-mrspashett/sssssj93</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-rule-demonstration-by-mrspashett/sssssj93"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-rule-demonstration-by-mrspashett/sssssj93"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-rule-demonstration-by-mrspashett/sssssj93"/>
      <lastmod>2026-11-02T15:38:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-sine-function/sssssj9q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-sine-function/sssssj9q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-sine-function/sssssj9q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-sine-function/sssssj9q"/>
      <lastmod>2026-11-01T20:59:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-of-sine-function/sssssj9q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-sine-function/sssssj9q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-sine-function/sssssj9q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-sine-function/sssssj9q"/>
      <lastmod>2026-11-01T20:59:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-by-tbignell/sssssj91</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-by-tbignell/sssssj91"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-by-tbignell/sssssj91"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-by-tbignell/sssssj91"/>
      <lastmod>2026-11-02T09:31:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-by-tbignell/sssssj91</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-by-tbignell/sssssj91"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-by-tbignell/sssssj91"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-by-tbignell/sssssj91"/>
      <lastmod>2026-11-02T09:31:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/effect-of-reflections-on-the-derivative/sssssj9m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/effect-of-reflections-on-the-derivative/sssssj9m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/effect-of-reflections-on-the-derivative/sssssj9m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/effect-of-reflections-on-the-derivative/sssssj9m"/>
      <lastmod>2026-11-02T12:01:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/effect-of-reflections-on-the-derivative/sssssj9m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/effect-of-reflections-on-the-derivative/sssssj9m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/effect-of-reflections-on-the-derivative/sssssj9m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/effect-of-reflections-on-the-derivative/sssssj9m"/>
      <lastmod>2026-11-02T12:01:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inequality-comparison-generator/sssssj9j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inequality-comparison-generator/sssssj9j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inequality-comparison-generator/sssssj9j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inequality-comparison-generator/sssssj9j"/>
      <lastmod>2026-11-01T21:20:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inequality-comparison-generator/sssssj9j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inequality-comparison-generator/sssssj9j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inequality-comparison-generator/sssssj9j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inequality-comparison-generator/sssssj9j"/>
      <lastmod>2026-11-01T21:20:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplication-and-division-of-positive-integers/sssssj9p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-and-division-of-positive-integers/sssssj9p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-and-division-of-positive-integers/sssssj9p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-and-division-of-positive-integers/sssssj9p"/>
      <lastmod>2026-11-02T17:02:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplication-and-division-of-positive-integers/sssssj9p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-and-division-of-positive-integers/sssssj9p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-and-division-of-positive-integers/sssssj9p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-and-division-of-positive-integers/sssssj9p"/>
      <lastmod>2026-11-02T17:02:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-inequalities-by-stflew/sssssj9w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-inequalities-by-stflew/sssssj9w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-inequalities-by-stflew/sssssj9w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-inequalities-by-stflew/sssssj9w"/>
      <lastmod>2026-11-02T18:33:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-inequalities-by-stflew/sssssj9w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-inequalities-by-stflew/sssssj9w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-inequalities-by-stflew/sssssj9w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-inequalities-by-stflew/sssssj9w"/>
      <lastmod>2026-11-02T18:33:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-sum-of-a-quadrilateral/sssssj96</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-sum-of-a-quadrilateral/sssssj96"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-sum-of-a-quadrilateral/sssssj96"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-sum-of-a-quadrilateral/sssssj96"/>
      <lastmod>2026-11-02T18:47:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-sum-of-a-quadrilateral/sssssj96</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-sum-of-a-quadrilateral/sssssj96"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-sum-of-a-quadrilateral/sssssj96"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-sum-of-a-quadrilateral/sssssj96"/>
      <lastmod>2026-11-02T18:47:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-digit-subtraction-visualization-with-place-value-decomposition/sssssj9g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-digit-subtraction-visualization-with-place-value-decomposition/sssssj9g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-digit-subtraction-visualization-with-place-value-decomposition/sssssj9g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-digit-subtraction-visualization-with-place-value-decomposition/sssssj9g"/>
      <lastmod>2026-11-02T03:07:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-digit-subtraction-visualization-with-place-value-decomposition/sssssj9g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-digit-subtraction-visualization-with-place-value-decomposition/sssssj9g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-digit-subtraction-visualization-with-place-value-decomposition/sssssj9g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-digit-subtraction-visualization-with-place-value-decomposition/sssssj9g"/>
      <lastmod>2026-11-02T03:07:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-exponential-and-logarithmic-functions-by-baleihi/sssssj99</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-exponential-and-logarithmic-functions-by-baleihi/sssssj99"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-exponential-and-logarithmic-functions-by-baleihi/sssssj99"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-exponential-and-logarithmic-functions-by-baleihi/sssssj99"/>
      <lastmod>2026-11-02T17:53:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-exponential-and-logarithmic-functions-by-baleihi/sssssj99</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-exponential-and-logarithmic-functions-by-baleihi/sssssj99"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-exponential-and-logarithmic-functions-by-baleihi/sssssj99"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-exponential-and-logarithmic-functions-by-baleihi/sssssj99"/>
      <lastmod>2026-11-02T17:53:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tracing-surfaces-in-3d/sssssj9e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tracing-surfaces-in-3d/sssssj9e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tracing-surfaces-in-3d/sssssj9e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tracing-surfaces-in-3d/sssssj9e"/>
      <lastmod>2026-11-01T21:09:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tracing-surfaces-in-3d/sssssj9e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tracing-surfaces-in-3d/sssssj9e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tracing-surfaces-in-3d/sssssj9e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tracing-surfaces-in-3d/sssssj9e"/>
      <lastmod>2026-11-01T21:09:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/calculating-area-of-a-parallelogram/sssssj9v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-area-of-a-parallelogram/sssssj9v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-area-of-a-parallelogram/sssssj9v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-area-of-a-parallelogram/sssssj9v"/>
      <lastmod>2026-11-02T10:55:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/calculating-area-of-a-parallelogram/sssssj9v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-area-of-a-parallelogram/sssssj9v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-area-of-a-parallelogram/sssssj9v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-area-of-a-parallelogram/sssssj9v"/>
      <lastmod>2026-11-02T10:55:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/imaginary-planes-spatial-geometric-construction-and-transformation/sssssj94</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/imaginary-planes-spatial-geometric-construction-and-transformation/sssssj94"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/imaginary-planes-spatial-geometric-construction-and-transformation/sssssj94"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/imaginary-planes-spatial-geometric-construction-and-transformation/sssssj94"/>
      <lastmod>2026-11-01T21:15:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/imaginary-planes-spatial-geometric-construction-and-transformation/sssssj94</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/imaginary-planes-spatial-geometric-construction-and-transformation/sssssj94"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/imaginary-planes-spatial-geometric-construction-and-transformation/sssssj94"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/imaginary-planes-spatial-geometric-construction-and-transformation/sssssj94"/>
      <lastmod>2026-11-01T21:15:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/decimals-rounding-and-truncation/sssssj9l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimals-rounding-and-truncation/sssssj9l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimals-rounding-and-truncation/sssssj9l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimals-rounding-and-truncation/sssssj9l"/>
      <lastmod>2026-11-01T20:42:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/decimals-rounding-and-truncation/sssssj9l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimals-rounding-and-truncation/sssssj9l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimals-rounding-and-truncation/sssssj9l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimals-rounding-and-truncation/sssssj9l"/>
      <lastmod>2026-11-01T20:42:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plane-geometry-demonstration/sssssj9y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plane-geometry-demonstration/sssssj9y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plane-geometry-demonstration/sssssj9y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plane-geometry-demonstration/sssssj9y"/>
      <lastmod>2026-11-02T12:29:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plane-geometry-demonstration/sssssj9y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plane-geometry-demonstration/sssssj9y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plane-geometry-demonstration/sssssj9y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plane-geometry-demonstration/sssssj9y"/>
      <lastmod>2026-11-02T12:29:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/chess-and-grains-modeling-exponential-growth-with-a-spreadsheet/sssssj9a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chess-and-grains-modeling-exponential-growth-with-a-spreadsheet/sssssj9a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chess-and-grains-modeling-exponential-growth-with-a-spreadsheet/sssssj9a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chess-and-grains-modeling-exponential-growth-with-a-spreadsheet/sssssj9a"/>
      <lastmod>2026-11-01T21:50:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/chess-and-grains-modeling-exponential-growth-with-a-spreadsheet/sssssj9a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chess-and-grains-modeling-exponential-growth-with-a-spreadsheet/sssssj9a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chess-and-grains-modeling-exponential-growth-with-a-spreadsheet/sssssj9a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chess-and-grains-modeling-exponential-growth-with-a-spreadsheet/sssssj9a"/>
      <lastmod>2026-11-01T21:50:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fehr-problem-6-7/sssssj9c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fehr-problem-6-7/sssssj9c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fehr-problem-6-7/sssssj9c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fehr-problem-6-7/sssssj9c"/>
      <lastmod>2026-11-02T17:42:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fehr-problem-6-7/sssssj9c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fehr-problem-6-7/sssssj9c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fehr-problem-6-7/sssssj9c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fehr-problem-6-7/sssssj9c"/>
      <lastmod>2026-11-02T17:42:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallel-lines-in-the-coordinate-plane-by-tim-brzezinski/sssssj9r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-lines-in-the-coordinate-plane-by-tim-brzezinski/sssssj9r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-lines-in-the-coordinate-plane-by-tim-brzezinski/sssssj9r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-lines-in-the-coordinate-plane-by-tim-brzezinski/sssssj9r"/>
      <lastmod>2026-11-02T17:59:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallel-lines-in-the-coordinate-plane-by-tim-brzezinski/sssssj9r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-lines-in-the-coordinate-plane-by-tim-brzezinski/sssssj9r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-lines-in-the-coordinate-plane-by-tim-brzezinski/sssssj9r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-lines-in-the-coordinate-plane-by-tim-brzezinski/sssssj9r"/>
      <lastmod>2026-11-02T17:59:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-r-sankara-narayana-reddy/sssssj9h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-r-sankara-narayana-reddy/sssssj9h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-demonstration-by-r-sankara-narayana-reddy/sssssj9h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-r-sankara-narayana-reddy/sssssj9h"/>
      <lastmod>2026-11-02T18:16:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-addition-demonstration-by-r-sankara-narayana-reddy/sssssj9h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-r-sankara-narayana-reddy/sssssj9h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-demonstration-by-r-sankara-narayana-reddy/sssssj9h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-r-sankara-narayana-reddy/sssssj9h"/>
      <lastmod>2026-11-02T18:16:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-transformation-demo-by-jeremy-bell/sssssj9t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-transformation-demo-by-jeremy-bell/sssssj9t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-transformation-demo-by-jeremy-bell/sssssj9t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-transformation-demo-by-jeremy-bell/sssssj9t"/>
      <lastmod>2026-11-02T18:01:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-transformation-demo-by-jeremy-bell/sssssj9t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-transformation-demo-by-jeremy-bell/sssssj9t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-transformation-demo-by-jeremy-bell/sssssj9t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-transformation-demo-by-jeremy-bell/sssssj9t"/>
      <lastmod>2026-11-02T18:01:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/folium-of-descartes-with-unit-tangent-vector/sssssj9x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/folium-of-descartes-with-unit-tangent-vector/sssssj9x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/folium-of-descartes-with-unit-tangent-vector/sssssj9x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/folium-of-descartes-with-unit-tangent-vector/sssssj9x"/>
      <lastmod>2026-11-01T21:27:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/folium-of-descartes-with-unit-tangent-vector/sssssj9x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/folium-of-descartes-with-unit-tangent-vector/sssssj9x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/folium-of-descartes-with-unit-tangent-vector/sssssj9x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/folium-of-descartes-with-unit-tangent-vector/sssssj9x"/>
      <lastmod>2026-11-01T21:27:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/color-surfaces-f-x-y-on-the-cube/sssssj9i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/color-surfaces-f-x-y-on-the-cube/sssssj9i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/color-surfaces-f-x-y-on-the-cube/sssssj9i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/color-surfaces-f-x-y-on-the-cube/sssssj9i"/>
      <lastmod>2026-11-01T19:33:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/color-surfaces-f-x-y-on-the-cube/sssssj9i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/color-surfaces-f-x-y-on-the-cube/sssssj9i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/color-surfaces-f-x-y-on-the-cube/sssssj9i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/color-surfaces-f-x-y-on-the-cube/sssssj9i"/>
      <lastmod>2026-11-01T19:33:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-exponents/sssssj9o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-exponents/sssssj9o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-exponents/sssssj9o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-exponents/sssssj9o"/>
      <lastmod>2026-11-01T19:26:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-exponents/sssssj9o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-exponents/sssssj9o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-exponents/sssssj9o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-exponents/sssssj9o"/>
      <lastmod>2026-11-01T19:26:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-and-function-interaction-demo/sssssjes</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-and-function-interaction-demo/sssssjes"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-and-function-interaction-demo/sssssjes"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-and-function-interaction-demo/sssssjes"/>
      <lastmod>2026-11-01T20:46:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-and-function-interaction-demo/sssssjes</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-and-function-interaction-demo/sssssjes"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-and-function-interaction-demo/sssssjes"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-and-function-interaction-demo/sssssjes"/>
      <lastmod>2026-11-01T20:46:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intuitive-derivative-of-the-sin-function/sssssje7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intuitive-derivative-of-the-sin-function/sssssje7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intuitive-derivative-of-the-sin-function/sssssje7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intuitive-derivative-of-the-sin-function/sssssje7"/>
      <lastmod>2026-11-02T17:41:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intuitive-derivative-of-the-sin-function/sssssje7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intuitive-derivative-of-the-sin-function/sssssje7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intuitive-derivative-of-the-sin-function/sssssje7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intuitive-derivative-of-the-sin-function/sssssje7"/>
      <lastmod>2026-11-02T17:41:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circumcenter-of-a-triangle-by-jorge-c-ssio/sssssjen</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumcenter-of-a-triangle-by-jorge-c-ssio/sssssjen"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumcenter-of-a-triangle-by-jorge-c-ssio/sssssjen"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumcenter-of-a-triangle-by-jorge-c-ssio/sssssjen"/>
      <lastmod>2026-11-01T20:48:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circumcenter-of-a-triangle-by-jorge-c-ssio/sssssjen</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumcenter-of-a-triangle-by-jorge-c-ssio/sssssjen"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumcenter-of-a-triangle-by-jorge-c-ssio/sssssjen"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumcenter-of-a-triangle-by-jorge-c-ssio/sssssjen"/>
      <lastmod>2026-11-01T20:48:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slopefields-and-euler-s-method/sssssje2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slopefields-and-euler-s-method/sssssje2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slopefields-and-euler-s-method/sssssje2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slopefields-and-euler-s-method/sssssje2"/>
      <lastmod>2026-11-02T16:37:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slopefields-and-euler-s-method/sssssje2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slopefields-and-euler-s-method/sssssje2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slopefields-and-euler-s-method/sssssje2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slopefields-and-euler-s-method/sssssje2"/>
      <lastmod>2026-11-02T16:37:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translating-objects-with-vectors/sssssjek</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translating-objects-with-vectors/sssssjek"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translating-objects-with-vectors/sssssjek"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translating-objects-with-vectors/sssssjek"/>
      <lastmod>2026-11-02T17:01:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translating-objects-with-vectors/sssssjek</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translating-objects-with-vectors/sssssjek"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translating-objects-with-vectors/sssssjek"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translating-objects-with-vectors/sssssjek"/>
      <lastmod>2026-11-02T17:01:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-simultaneous-equations/sssssjez</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-simultaneous-equations/sssssjez"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-simultaneous-equations/sssssjez"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-simultaneous-equations/sssssjez"/>
      <lastmod>2026-11-02T09:54:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-simultaneous-equations/sssssjez</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-simultaneous-equations/sssssjez"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-simultaneous-equations/sssssjez"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-simultaneous-equations/sssssjez"/>
      <lastmod>2026-11-02T09:54:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exact-values-on-the-unit-circle/sssssje0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exact-values-on-the-unit-circle/sssssje0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exact-values-on-the-unit-circle/sssssje0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exact-values-on-the-unit-circle/sssssje0"/>
      <lastmod>2026-11-02T13:15:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exact-values-on-the-unit-circle/sssssje0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exact-values-on-the-unit-circle/sssssje0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exact-values-on-the-unit-circle/sssssje0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exact-values-on-the-unit-circle/sssssje0"/>
      <lastmod>2026-11-02T13:15:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-kite-construction/sssssjed</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-kite-construction/sssssjed"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-kite-construction/sssssjed"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-kite-construction/sssssjed"/>
      <lastmod>2026-11-01T21:35:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-kite-construction/sssssjed</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-kite-construction/sssssjed"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-kite-construction/sssssjed"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-kite-construction/sssssjed"/>
      <lastmod>2026-11-01T21:35:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-a-hexagon-made-with-pascal-s-triangles/sssssjef</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-a-hexagon-made-with-pascal-s-triangles/sssssjef"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-a-hexagon-made-with-pascal-s-triangles/sssssjef"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-a-hexagon-made-with-pascal-s-triangles/sssssjef"/>
      <lastmod>2026-11-01T23:11:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-a-hexagon-made-with-pascal-s-triangles/sssssjef</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-a-hexagon-made-with-pascal-s-triangles/sssssjef"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-a-hexagon-made-with-pascal-s-triangles/sssssjef"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-a-hexagon-made-with-pascal-s-triangles/sssssjef"/>
      <lastmod>2026-11-01T23:11:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-function-calculator/sssssje8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-function-calculator/sssssje8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-function-calculator/sssssje8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-function-calculator/sssssje8"/>
      <lastmod>2026-11-02T18:54:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-function-calculator/sssssje8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-function-calculator/sssssje8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-function-calculator/sssssje8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-function-calculator/sssssje8"/>
      <lastmod>2026-11-02T18:54:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-construction-of-exponential-function-and-derivative-ccd-ddf-1/sssssjeu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-construction-of-exponential-function-and-derivative-ccd-ddf-1/sssssjeu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-construction-of-exponential-function-and-derivative-ccd-ddf-1/sssssjeu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-construction-of-exponential-function-and-derivative-ccd-ddf-1/sssssjeu"/>
      <lastmod>2026-11-02T17:56:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-construction-of-exponential-function-and-derivative-ccd-ddf-1/sssssjeu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-construction-of-exponential-function-and-derivative-ccd-ddf-1/sssssjeu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-construction-of-exponential-function-and-derivative-ccd-ddf-1/sssssjeu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-construction-of-exponential-function-and-derivative-ccd-ddf-1/sssssjeu"/>
      <lastmod>2026-11-02T17:56:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mode-shape-of-pinned-pinned-beam/sssssje5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mode-shape-of-pinned-pinned-beam/sssssje5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mode-shape-of-pinned-pinned-beam/sssssje5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mode-shape-of-pinned-pinned-beam/sssssje5"/>
      <lastmod>2026-11-02T17:47:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mode-shape-of-pinned-pinned-beam/sssssje5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mode-shape-of-pinned-pinned-beam/sssssje5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mode-shape-of-pinned-pinned-beam/sssssje5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mode-shape-of-pinned-pinned-beam/sssssje5"/>
      <lastmod>2026-11-02T17:47:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/module-4-c-for-class-6a/sssssjeb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/module-4-c-for-class-6a/sssssjeb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/module-4-c-for-class-6a/sssssjeb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/module-4-c-for-class-6a/sssssjeb"/>
      <lastmod>2026-11-01T23:30:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/module-4-c-for-class-6a/sssssjeb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/module-4-c-for-class-6a/sssssjeb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/module-4-c-for-class-6a/sssssjeb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/module-4-c-for-class-6a/sssssjeb"/>
      <lastmod>2026-11-01T23:30:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solutions-to-quadratic-equations/sssssje3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solutions-to-quadratic-equations/sssssje3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solutions-to-quadratic-equations/sssssje3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solutions-to-quadratic-equations/sssssje3"/>
      <lastmod>2026-11-02T09:31:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solutions-to-quadratic-equations/sssssje3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solutions-to-quadratic-equations/sssssje3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solutions-to-quadratic-equations/sssssje3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solutions-to-quadratic-equations/sssssje3"/>
      <lastmod>2026-11-02T09:31:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/creating-parabolas/sssssjeq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/creating-parabolas/sssssjeq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/creating-parabolas/sssssjeq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/creating-parabolas/sssssjeq"/>
      <lastmod>2026-11-02T18:22:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/creating-parabolas/sssssjeq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/creating-parabolas/sssssjeq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/creating-parabolas/sssssjeq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/creating-parabolas/sssssjeq"/>
      <lastmod>2026-11-02T18:22:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/extending-poles-and-strings-problem/sssssje1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/extending-poles-and-strings-problem/sssssje1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/extending-poles-and-strings-problem/sssssje1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/extending-poles-and-strings-problem/sssssje1"/>
      <lastmod>2026-11-01T19:12:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/extending-poles-and-strings-problem/sssssje1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/extending-poles-and-strings-problem/sssssje1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/extending-poles-and-strings-problem/sssssje1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/extending-poles-and-strings-problem/sssssje1"/>
      <lastmod>2026-11-01T19:12:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modul-8b-volume-limas-volume-calculation-in-solid-geometry/sssssjem</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modul-8b-volume-limas-volume-calculation-in-solid-geometry/sssssjem"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modul-8b-volume-limas-volume-calculation-in-solid-geometry/sssssjem"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modul-8b-volume-limas-volume-calculation-in-solid-geometry/sssssjem"/>
      <lastmod>2026-11-02T00:49:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modul-8b-volume-limas-volume-calculation-in-solid-geometry/sssssjem</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modul-8b-volume-limas-volume-calculation-in-solid-geometry/sssssjem"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modul-8b-volume-limas-volume-calculation-in-solid-geometry/sssssjem"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modul-8b-volume-limas-volume-calculation-in-solid-geometry/sssssjem"/>
      <lastmod>2026-11-02T00:49:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-triangles-and-parallelograms-on-a-triangle/sssssjej</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-triangles-and-parallelograms-on-a-triangle/sssssjej"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-triangles-and-parallelograms-on-a-triangle/sssssjej"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-triangles-and-parallelograms-on-a-triangle/sssssjej"/>
      <lastmod>2026-11-02T16:58:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-triangles-and-parallelograms-on-a-triangle/sssssjej</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-triangles-and-parallelograms-on-a-triangle/sssssjej"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-triangles-and-parallelograms-on-a-triangle/sssssjej"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-triangles-and-parallelograms-on-a-triangle/sssssjej"/>
      <lastmod>2026-11-02T16:58:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-points-plotting-example/sssssjep</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-points-plotting-example/sssssjep"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-points-plotting-example/sssssjep"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-points-plotting-example/sssssjep"/>
      <lastmod>2026-11-01T23:14:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-points-plotting-example/sssssjep</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-points-plotting-example/sssssjep"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-points-plotting-example/sssssjep"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-points-plotting-example/sssssjep"/>
      <lastmod>2026-11-01T23:14:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-kite-and-circumcircle-exercise/sssssjew</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-kite-and-circumcircle-exercise/sssssjew"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-kite-and-circumcircle-exercise/sssssjew"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-kite-and-circumcircle-exercise/sssssjew"/>
      <lastmod>2026-11-02T18:06:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-kite-and-circumcircle-exercise/sssssjew</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-kite-and-circumcircle-exercise/sssssjew"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-kite-and-circumcircle-exercise/sssssjew"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-kite-and-circumcircle-exercise/sssssjew"/>
      <lastmod>2026-11-02T18:06:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-in-a-prism/sssssje6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-in-a-prism/sssssje6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-in-a-prism/sssssje6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-in-a-prism/sssssje6"/>
      <lastmod>2026-11-01T21:10:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-in-a-prism/sssssje6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-in-a-prism/sssssje6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-in-a-prism/sssssje6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-in-a-prism/sssssje6"/>
      <lastmod>2026-11-01T21:10:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practice-finding-slope/sssssjeg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-finding-slope/sssssjeg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-finding-slope/sssssjeg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-finding-slope/sssssjeg"/>
      <lastmod>2026-11-01T19:09:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practice-finding-slope/sssssjeg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-finding-slope/sssssjeg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-finding-slope/sssssjeg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-finding-slope/sssssjeg"/>
      <lastmod>2026-11-01T19:09:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/percentage-test-scores-demo/sssssje9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/percentage-test-scores-demo/sssssje9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/percentage-test-scores-demo/sssssje9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/percentage-test-scores-demo/sssssje9"/>
      <lastmod>2026-11-01T19:38:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/percentage-test-scores-demo/sssssje9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/percentage-test-scores-demo/sssssje9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/percentage-test-scores-demo/sssssje9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/percentage-test-scores-demo/sssssje9"/>
      <lastmod>2026-11-01T19:38:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gradient-to-curve/sssssjee</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gradient-to-curve/sssssjee"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gradient-to-curve/sssssjee"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gradient-to-curve/sssssjee"/>
      <lastmod>2026-11-02T02:14:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gradient-to-curve/sssssjee</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gradient-to-curve/sssssjee"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gradient-to-curve/sssssjee"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gradient-to-curve/sssssjee"/>
      <lastmod>2026-11-02T02:14:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/different-methods-of-translation-task/sssssjev</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/different-methods-of-translation-task/sssssjev"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/different-methods-of-translation-task/sssssjev"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/different-methods-of-translation-task/sssssjev"/>
      <lastmod>2026-11-02T18:13:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/different-methods-of-translation-task/sssssjev</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/different-methods-of-translation-task/sssssjev"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/different-methods-of-translation-task/sssssjev"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/different-methods-of-translation-task/sssssjev"/>
      <lastmod>2026-11-02T18:13:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/locus-type-2/sssssje4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-type-2/sssssje4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-type-2/sssssje4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-type-2/sssssje4"/>
      <lastmod>2026-11-02T18:53:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/locus-type-2/sssssje4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-type-2/sssssje4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-type-2/sssssje4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-type-2/sssssje4"/>
      <lastmod>2026-11-02T18:53:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modified-binomial-distribution-demo/sssssjel</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modified-binomial-distribution-demo/sssssjel"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modified-binomial-distribution-demo/sssssjel"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modified-binomial-distribution-demo/sssssjel"/>
      <lastmod>2026-11-02T08:53:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modified-binomial-distribution-demo/sssssjel</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modified-binomial-distribution-demo/sssssjel"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modified-binomial-distribution-demo/sssssjel"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modified-binomial-distribution-demo/sssssjel"/>
      <lastmod>2026-11-02T08:53:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/identifying-populations-samples/sssssjey</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identifying-populations-samples/sssssjey"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identifying-populations-samples/sssssjey"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identifying-populations-samples/sssssjey"/>
      <lastmod>2026-11-02T12:21:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/identifying-populations-samples/sssssjey</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identifying-populations-samples/sssssjey"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identifying-populations-samples/sssssjey"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identifying-populations-samples/sssssjey"/>
      <lastmod>2026-11-02T12:21:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/limits-and-continuity-example-7-4-1/sssssjea</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-and-continuity-example-7-4-1/sssssjea"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-and-continuity-example-7-4-1/sssssjea"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-and-continuity-example-7-4-1/sssssjea"/>
      <lastmod>2026-11-02T02:55:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/limits-and-continuity-example-7-4-1/sssssjea</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-and-continuity-example-7-4-1/sssssjea"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-and-continuity-example-7-4-1/sssssjea"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-and-continuity-example-7-4-1/sssssjea"/>
      <lastmod>2026-11-02T02:55:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-in-the-cartesian-plane/sssssjec</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-in-the-cartesian-plane/sssssjec"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-in-the-cartesian-plane/sssssjec"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-in-the-cartesian-plane/sssssjec"/>
      <lastmod>2026-11-02T18:45:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-in-the-cartesian-plane/sssssjec</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-in-the-cartesian-plane/sssssjec"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-in-the-cartesian-plane/sssssjec"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-in-the-cartesian-plane/sssssjec"/>
      <lastmod>2026-11-02T18:45:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/three-bars-demo/sssssjer</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-bars-demo/sssssjer"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-bars-demo/sssssjer"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-bars-demo/sssssjer"/>
      <lastmod>2026-11-02T18:34:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/three-bars-demo/sssssjer</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-bars-demo/sssssjer"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-bars-demo/sssssjer"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-bars-demo/sssssjer"/>
      <lastmod>2026-11-02T18:34:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shadow-simulator/sssssjeh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shadow-simulator/sssssjeh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shadow-simulator/sssssjeh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shadow-simulator/sssssjeh"/>
      <lastmod>2026-11-01T22:09:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shadow-simulator/sssssjeh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shadow-simulator/sssssjeh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shadow-simulator/sssssjeh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shadow-simulator/sssssjeh"/>
      <lastmod>2026-11-01T22:09:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adjustable-histogram/sssssjet</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adjustable-histogram/sssssjet"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adjustable-histogram/sssssjet"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adjustable-histogram/sssssjet"/>
      <lastmod>2026-11-01T20:42:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adjustable-histogram/sssssjet</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adjustable-histogram/sssssjet"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adjustable-histogram/sssssjet"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adjustable-histogram/sssssjet"/>
      <lastmod>2026-11-01T20:42:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/total-internal-reflection-interactive-animation/sssssjex</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/total-internal-reflection-interactive-animation/sssssjex"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/total-internal-reflection-interactive-animation/sssssjex"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/total-internal-reflection-interactive-animation/sssssjex"/>
      <lastmod>2026-11-02T09:31:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/total-internal-reflection-interactive-animation/sssssjex</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/total-internal-reflection-interactive-animation/sssssjex"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/total-internal-reflection-interactive-animation/sssssjex"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/total-internal-reflection-interactive-animation/sssssjex"/>
      <lastmod>2026-11-02T09:31:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-perimeter-and-area-of-rectangles-by-tyrobson-gmail-com/sssssjei</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-perimeter-and-area-of-rectangles-by-tyrobson-gmail-com/sssssjei"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-perimeter-and-area-of-rectangles-by-tyrobson-gmail-com/sssssjei"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-perimeter-and-area-of-rectangles-by-tyrobson-gmail-com/sssssjei"/>
      <lastmod>2026-11-02T18:16:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-perimeter-and-area-of-rectangles-by-tyrobson-gmail-com/sssssjei</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-perimeter-and-area-of-rectangles-by-tyrobson-gmail-com/sssssjei"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-perimeter-and-area-of-rectangles-by-tyrobson-gmail-com/sssssjei"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-perimeter-and-area-of-rectangles-by-tyrobson-gmail-com/sssssjei"/>
      <lastmod>2026-11-02T18:16:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/partitioning-a-directed-line-segment/sssssjeo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partitioning-a-directed-line-segment/sssssjeo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partitioning-a-directed-line-segment/sssssjeo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partitioning-a-directed-line-segment/sssssjeo"/>
      <lastmod>2026-11-01T21:22:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/partitioning-a-directed-line-segment/sssssjeo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partitioning-a-directed-line-segment/sssssjeo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partitioning-a-directed-line-segment/sssssjeo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partitioning-a-directed-line-segment/sssssjeo"/>
      <lastmod>2026-11-01T21:22:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circular-cluster-model/sssssjvs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circular-cluster-model/sssssjvs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circular-cluster-model/sssssjvs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circular-cluster-model/sssssjvs"/>
      <lastmod>2026-11-02T00:52:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circular-cluster-model/sssssjvs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circular-cluster-model/sssssjvs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circular-cluster-model/sssssjvs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circular-cluster-model/sssssjvs"/>
      <lastmod>2026-11-02T00:52:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-probability-visualizing-area-ratio-with-random-points/sssssjv7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-probability-visualizing-area-ratio-with-random-points/sssssjv7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-probability-visualizing-area-ratio-with-random-points/sssssjv7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-probability-visualizing-area-ratio-with-random-points/sssssjv7"/>
      <lastmod>2026-11-02T17:40:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-probability-visualizing-area-ratio-with-random-points/sssssjv7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-probability-visualizing-area-ratio-with-random-points/sssssjv7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-probability-visualizing-area-ratio-with-random-points/sssssjv7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-probability-visualizing-area-ratio-with-random-points/sssssjv7"/>
      <lastmod>2026-11-02T17:40:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezium-properties-and-geometric-construction/sssssjvn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-properties-and-geometric-construction/sssssjvn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-properties-and-geometric-construction/sssssjvn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-properties-and-geometric-construction/sssssjvn"/>
      <lastmod>2026-11-02T00:39:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezium-properties-and-geometric-construction/sssssjvn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-properties-and-geometric-construction/sssssjvn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-properties-and-geometric-construction/sssssjvn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-properties-and-geometric-construction/sssssjvn"/>
      <lastmod>2026-11-02T00:39:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cuboids-with-sa-v-model/sssssjv2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cuboids-with-sa-v-model/sssssjv2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cuboids-with-sa-v-model/sssssjv2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cuboids-with-sa-v-model/sssssjv2"/>
      <lastmod>2026-11-01T21:09:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cuboids-with-sa-v-model/sssssjv2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cuboids-with-sa-v-model/sssssjv2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cuboids-with-sa-v-model/sssssjv2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cuboids-with-sa-v-model/sssssjv2"/>
      <lastmod>2026-11-01T21:09:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-projections-in-2d/sssssjvk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-projections-in-2d/sssssjvk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-projections-in-2d/sssssjvk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-projections-in-2d/sssssjvk"/>
      <lastmod>2026-11-01T21:26:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-projections-in-2d/sssssjvk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-projections-in-2d/sssssjvk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-projections-in-2d/sssssjvk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-projections-in-2d/sssssjvk"/>
      <lastmod>2026-11-01T21:26:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-sss-triangle-similarity-theorem-applet/sssssjvz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-sss-triangle-similarity-theorem-applet/sssssjvz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-sss-triangle-similarity-theorem-applet/sssssjvz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-sss-triangle-similarity-theorem-applet/sssssjvz"/>
      <lastmod>2026-11-02T18:27:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-sss-triangle-similarity-theorem-applet/sssssjvz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-sss-triangle-similarity-theorem-applet/sssssjvz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-sss-triangle-similarity-theorem-applet/sssssjvz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-sss-triangle-similarity-theorem-applet/sssssjvz"/>
      <lastmod>2026-11-02T18:27:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-table-view/sssssjv0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-table-view/sssssjv0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-table-view/sssssjv0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-table-view/sssssjv0"/>
      <lastmod>2026-11-02T02:41:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-table-view/sssssjv0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-table-view/sssssjv0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-table-view/sssssjv0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-table-view/sssssjv0"/>
      <lastmod>2026-11-02T02:41:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-a-right-pyramid-by-alex-smith/sssssjvd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-right-pyramid-by-alex-smith/sssssjvd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-right-pyramid-by-alex-smith/sssssjvd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-right-pyramid-by-alex-smith/sssssjvd"/>
      <lastmod>2026-11-02T18:59:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-a-right-pyramid-by-alex-smith/sssssjvd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-right-pyramid-by-alex-smith/sssssjvd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-right-pyramid-by-alex-smith/sssssjvd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-right-pyramid-by-alex-smith/sssssjvd"/>
      <lastmod>2026-11-02T18:59:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-calculator/sssssjvf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-calculator/sssssjvf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-calculator/sssssjvf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-calculator/sssssjvf"/>
      <lastmod>2026-11-02T02:35:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-calculator/sssssjvf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-calculator/sssssjvf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-calculator/sssssjvf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-calculator/sssssjvf"/>
      <lastmod>2026-11-02T02:35:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-exploration-task-by-dthurston/sssssjv8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-exploration-task-by-dthurston/sssssjv8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-exploration-task-by-dthurston/sssssjv8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-exploration-task-by-dthurston/sssssjv8"/>
      <lastmod>2026-11-02T17:45:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-exploration-task-by-dthurston/sssssjv8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-exploration-task-by-dthurston/sssssjv8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-exploration-task-by-dthurston/sssssjv8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-exploration-task-by-dthurston/sssssjv8"/>
      <lastmod>2026-11-02T17:45:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoid-geometric-construction-and-statistical-analysis/sssssjvu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-geometric-construction-and-statistical-analysis/sssssjvu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-geometric-construction-and-statistical-analysis/sssssjvu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-geometric-construction-and-statistical-analysis/sssssjvu"/>
      <lastmod>2026-11-02T00:14:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoid-geometric-construction-and-statistical-analysis/sssssjvu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-geometric-construction-and-statistical-analysis/sssssjvu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-geometric-construction-and-statistical-analysis/sssssjvu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-geometric-construction-and-statistical-analysis/sssssjvu"/>
      <lastmod>2026-11-02T00:14:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-a-prism-with-regular-hexagonal-base-integration-and-slice-summation/sssssjv5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-prism-with-regular-hexagonal-base-integration-and-slice-summation/sssssjv5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-prism-with-regular-hexagonal-base-integration-and-slice-summation/sssssjv5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-prism-with-regular-hexagonal-base-integration-and-slice-summation/sssssjv5"/>
      <lastmod>2026-11-02T10:43:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-a-prism-with-regular-hexagonal-base-integration-and-slice-summation/sssssjv5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-prism-with-regular-hexagonal-base-integration-and-slice-summation/sssssjv5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-prism-with-regular-hexagonal-base-integration-and-slice-summation/sssssjv5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-prism-with-regular-hexagonal-base-integration-and-slice-summation/sssssjv5"/>
      <lastmod>2026-11-02T10:43:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/laws-of-sine-and-cosine/sssssjvb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/laws-of-sine-and-cosine/sssssjvb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/laws-of-sine-and-cosine/sssssjvb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/laws-of-sine-and-cosine/sssssjvb"/>
      <lastmod>2026-11-01T19:27:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/laws-of-sine-and-cosine/sssssjvb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/laws-of-sine-and-cosine/sssssjvb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/laws-of-sine-and-cosine/sssssjvb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/laws-of-sine-and-cosine/sssssjvb"/>
      <lastmod>2026-11-01T19:27:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/elliptic-cone/sssssjv3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/elliptic-cone/sssssjv3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/elliptic-cone/sssssjv3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/elliptic-cone/sssssjv3"/>
      <lastmod>2026-11-02T09:33:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/elliptic-cone/sssssjv3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/elliptic-cone/sssssjv3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/elliptic-cone/sssssjv3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/elliptic-cone/sssssjv3"/>
      <lastmod>2026-11-02T09:33:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/penrose-darts-and-kites-dynamic-inflation/sssssjvq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/penrose-darts-and-kites-dynamic-inflation/sssssjvq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/penrose-darts-and-kites-dynamic-inflation/sssssjvq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/penrose-darts-and-kites-dynamic-inflation/sssssjvq"/>
      <lastmod>2026-11-02T18:33:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/penrose-darts-and-kites-dynamic-inflation/sssssjvq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/penrose-darts-and-kites-dynamic-inflation/sssssjvq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/penrose-darts-and-kites-dynamic-inflation/sssssjvq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/penrose-darts-and-kites-dynamic-inflation/sssssjvq"/>
      <lastmod>2026-11-02T18:33:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-distribution-expected-value/sssssjv1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-distribution-expected-value/sssssjv1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-distribution-expected-value/sssssjv1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-distribution-expected-value/sssssjv1"/>
      <lastmod>2026-11-01T20:56:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-distribution-expected-value/sssssjv1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-distribution-expected-value/sssssjv1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-distribution-expected-value/sssssjv1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-distribution-expected-value/sssssjv1"/>
      <lastmod>2026-11-01T20:56:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-quadrilaterals/sssssjvm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-quadrilaterals/sssssjvm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-quadrilaterals/sssssjvm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-quadrilaterals/sssssjvm"/>
      <lastmod>2026-11-02T02:42:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-quadrilaterals/sssssjvm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-quadrilaterals/sssssjvm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-quadrilaterals/sssssjvm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-quadrilaterals/sssssjvm"/>
      <lastmod>2026-11-02T02:42:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponent-rules-interactive-practice-demonstrating-power-laws-with-buttons-and-t/sssssjvj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-rules-interactive-practice-demonstrating-power-laws-with-buttons-and-t/sssssjvj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-rules-interactive-practice-demonstrating-power-laws-with-buttons-and-t/sssssjvj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-rules-interactive-practice-demonstrating-power-laws-with-buttons-and-t/sssssjvj"/>
      <lastmod>2026-11-02T13:28:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponent-rules-interactive-practice-demonstrating-power-laws-with-buttons-and-t/sssssjvj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-rules-interactive-practice-demonstrating-power-laws-with-buttons-and-t/sssssjvj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-rules-interactive-practice-demonstrating-power-laws-with-buttons-and-t/sssssjvj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-rules-interactive-practice-demonstrating-power-laws-with-buttons-and-t/sssssjvj"/>
      <lastmod>2026-11-02T13:28:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-sine-and-cosine-functions-by-mark-beckwith/sssssjvp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-sine-and-cosine-functions-by-mark-beckwith/sssssjvp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-sine-and-cosine-functions-by-mark-beckwith/sssssjvp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-sine-and-cosine-functions-by-mark-beckwith/sssssjvp"/>
      <lastmod>2026-11-02T16:42:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-sine-and-cosine-functions-by-mark-beckwith/sssssjvp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-sine-and-cosine-functions-by-mark-beckwith/sssssjvp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-sine-and-cosine-functions-by-mark-beckwith/sssssjvp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-sine-and-cosine-functions-by-mark-beckwith/sssssjvp"/>
      <lastmod>2026-11-02T16:42:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-pyramid-by-sudeep-gokarakonda/sssssjvw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-pyramid-by-sudeep-gokarakonda/sssssjvw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-pyramid-by-sudeep-gokarakonda/sssssjvw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-pyramid-by-sudeep-gokarakonda/sssssjvw"/>
      <lastmod>2026-11-01T23:44:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-a-pyramid-by-sudeep-gokarakonda/sssssjvw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-pyramid-by-sudeep-gokarakonda/sssssjvw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-pyramid-by-sudeep-gokarakonda/sssssjvw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-pyramid-by-sudeep-gokarakonda/sssssjvw"/>
      <lastmod>2026-11-01T23:44:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/star-polygons-with-turtle-command/sssssjv6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/star-polygons-with-turtle-command/sssssjv6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/star-polygons-with-turtle-command/sssssjv6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/star-polygons-with-turtle-command/sssssjv6"/>
      <lastmod>2026-11-02T16:39:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/star-polygons-with-turtle-command/sssssjv6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/star-polygons-with-turtle-command/sssssjv6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/star-polygons-with-turtle-command/sssssjv6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/star-polygons-with-turtle-command/sssssjv6"/>
      <lastmod>2026-11-02T16:39:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prism-to-pyramid-transformation/sssssjvg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-to-pyramid-transformation/sssssjvg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-to-pyramid-transformation/sssssjvg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-to-pyramid-transformation/sssssjvg"/>
      <lastmod>2026-11-01T23:56:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prism-to-pyramid-transformation/sssssjvg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-to-pyramid-transformation/sssssjvg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-to-pyramid-transformation/sssssjvg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-to-pyramid-transformation/sssssjvg"/>
      <lastmod>2026-11-01T23:56:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-exploration/sssssjv9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-exploration/sssssjv9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-exploration/sssssjv9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-exploration/sssssjv9"/>
      <lastmod>2026-11-02T13:03:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-exploration/sssssjv9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-exploration/sssssjv9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-exploration/sssssjv9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-exploration/sssssjv9"/>
      <lastmod>2026-11-02T13:03:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-root-demonstration/sssssjve</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-demonstration/sssssjve"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-demonstration/sssssjve"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-demonstration/sssssjve"/>
      <lastmod>2026-11-01T21:32:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-root-demonstration/sssssjve</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-demonstration/sssssjve"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-demonstration/sssssjve"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-demonstration/sssssjve"/>
      <lastmod>2026-11-01T21:32:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-development-part-3/sssssjvv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-development-part-3/sssssjvv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-development-part-3/sssssjvv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-development-part-3/sssssjvv"/>
      <lastmod>2026-11-02T18:02:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-development-part-3/sssssjvv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-development-part-3/sssssjvv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-development-part-3/sssssjvv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-development-part-3/sssssjvv"/>
      <lastmod>2026-11-02T18:02:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-visualization/sssssjv4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-visualization/sssssjv4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-visualization/sssssjv4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-visualization/sssssjv4"/>
      <lastmod>2026-11-02T02:38:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-visualization/sssssjv4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-visualization/sssssjv4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-visualization/sssssjv4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-visualization/sssssjv4"/>
      <lastmod>2026-11-02T02:38:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-construction-by-osoneal671/sssssjvl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-construction-by-osoneal671/sssssjvl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-construction-by-osoneal671/sssssjvl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-construction-by-osoneal671/sssssjvl"/>
      <lastmod>2026-11-02T17:53:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-construction-by-osoneal671/sssssjvl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-construction-by-osoneal671/sssssjvl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-construction-by-osoneal671/sssssjvl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-construction-by-osoneal671/sssssjvl"/>
      <lastmod>2026-11-02T17:53:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/understanding-the-chain-rule/sssssjvy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/understanding-the-chain-rule/sssssjvy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/understanding-the-chain-rule/sssssjvy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/understanding-the-chain-rule/sssssjvy"/>
      <lastmod>2026-11-02T02:57:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/understanding-the-chain-rule/sssssjvy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/understanding-the-chain-rule/sssssjvy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/understanding-the-chain-rule/sssssjvy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/understanding-the-chain-rule/sssssjvy"/>
      <lastmod>2026-11-02T02:57:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-surface-area/sssssjva</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-surface-area/sssssjva"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-surface-area/sssssjva"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-surface-area/sssssjva"/>
      <lastmod>2026-11-02T17:08:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-surface-area/sssssjva</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-surface-area/sssssjva"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-surface-area/sssssjva"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-surface-area/sssssjva"/>
      <lastmod>2026-11-02T17:08:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spherical-coordinates-by-dr-ian-lundholm/sssssjvc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-coordinates-by-dr-ian-lundholm/sssssjvc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-coordinates-by-dr-ian-lundholm/sssssjvc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-coordinates-by-dr-ian-lundholm/sssssjvc"/>
      <lastmod>2026-11-02T15:37:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spherical-coordinates-by-dr-ian-lundholm/sssssjvc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-coordinates-by-dr-ian-lundholm/sssssjvc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-coordinates-by-dr-ian-lundholm/sssssjvc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-coordinates-by-dr-ian-lundholm/sssssjvc"/>
      <lastmod>2026-11-02T15:37:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-coordinates-by-andrius/sssssjvr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-coordinates-by-andrius/sssssjvr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-coordinates-by-andrius/sssssjvr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-coordinates-by-andrius/sssssjvr"/>
      <lastmod>2026-11-01T20:50:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-coordinates-by-andrius/sssssjvr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-coordinates-by-andrius/sssssjvr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-coordinates-by-andrius/sssssjvr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-coordinates-by-andrius/sssssjvr"/>
      <lastmod>2026-11-01T20:50:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-combination-by-malin-christersson/sssssjvh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-combination-by-malin-christersson/sssssjvh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-combination-by-malin-christersson/sssssjvh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-combination-by-malin-christersson/sssssjvh"/>
      <lastmod>2026-11-01T23:41:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-combination-by-malin-christersson/sssssjvh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-combination-by-malin-christersson/sssssjvh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-combination-by-malin-christersson/sssssjvh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-combination-by-malin-christersson/sssssjvh"/>
      <lastmod>2026-11-01T23:41:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-isosceles-trapezium/sssssjvt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-isosceles-trapezium/sssssjvt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-isosceles-trapezium/sssssjvt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-isosceles-trapezium/sssssjvt"/>
      <lastmod>2026-11-02T02:38:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-isosceles-trapezium/sssssjvt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-isosceles-trapezium/sssssjvt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-isosceles-trapezium/sssssjvt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-isosceles-trapezium/sssssjvt"/>
      <lastmod>2026-11-02T02:38:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-perimeter-of-polygons/sssssjvx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-perimeter-of-polygons/sssssjvx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-perimeter-of-polygons/sssssjvx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-perimeter-of-polygons/sssssjvx"/>
      <lastmod>2026-11-02T18:10:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-perimeter-of-polygons/sssssjvx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-perimeter-of-polygons/sssssjvx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-perimeter-of-polygons/sssssjvx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-perimeter-of-polygons/sssssjvx"/>
      <lastmod>2026-11-02T18:10:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volumes-of-revolution-between-rotated-quadratics/sssssjvi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-of-revolution-between-rotated-quadratics/sssssjvi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-of-revolution-between-rotated-quadratics/sssssjvi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-of-revolution-between-rotated-quadratics/sssssjvi"/>
      <lastmod>2026-11-01T20:51:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volumes-of-revolution-between-rotated-quadratics/sssssjvi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-of-revolution-between-rotated-quadratics/sssssjvi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-of-revolution-between-rotated-quadratics/sssssjvi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-of-revolution-between-rotated-quadratics/sssssjvi"/>
      <lastmod>2026-11-01T20:51:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logarithm-problem-visualization/sssssjvo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithm-problem-visualization/sssssjvo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithm-problem-visualization/sssssjvo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithm-problem-visualization/sssssjvo"/>
      <lastmod>2026-11-01T23:50:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logarithm-problem-visualization/sssssjvo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithm-problem-visualization/sssssjvo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithm-problem-visualization/sssssjvo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithm-problem-visualization/sssssjvo"/>
      <lastmod>2026-11-01T23:50:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prism-cross-section-demo/sssssj4s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-cross-section-demo/sssssj4s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-cross-section-demo/sssssj4s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-cross-section-demo/sssssj4s"/>
      <lastmod>2026-11-02T17:07:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prism-cross-section-demo/sssssj4s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-cross-section-demo/sssssj4s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-cross-section-demo/sssssj4s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-cross-section-demo/sssssj4s"/>
      <lastmod>2026-11-02T17:07:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotations-on-the-coordinate-plane/sssssj47</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotations-on-the-coordinate-plane/sssssj47"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotations-on-the-coordinate-plane/sssssj47"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotations-on-the-coordinate-plane/sssssj47"/>
      <lastmod>2026-11-01T23:57:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotations-on-the-coordinate-plane/sssssj47</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotations-on-the-coordinate-plane/sssssj47"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotations-on-the-coordinate-plane/sssssj47"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotations-on-the-coordinate-plane/sssssj47"/>
      <lastmod>2026-11-01T23:57:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exercise-19-random-triangle-construction/sssssj4n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-19-random-triangle-construction/sssssj4n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-19-random-triangle-construction/sssssj4n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-19-random-triangle-construction/sssssj4n"/>
      <lastmod>2026-11-02T18:53:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exercise-19-random-triangle-construction/sssssj4n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-19-random-triangle-construction/sssssj4n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-19-random-triangle-construction/sssssj4n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-19-random-triangle-construction/sssssj4n"/>
      <lastmod>2026-11-02T18:53:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-exploration-of-exponents-with-geometric-construction/sssssj42</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-exponents-with-geometric-construction/sssssj42"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-exploration-of-exponents-with-geometric-construction/sssssj42"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-exponents-with-geometric-construction/sssssj42"/>
      <lastmod>2026-11-02T10:59:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-exploration-of-exponents-with-geometric-construction/sssssj42</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-exponents-with-geometric-construction/sssssj42"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-exploration-of-exponents-with-geometric-construction/sssssj42"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-exponents-with-geometric-construction/sssssj42"/>
      <lastmod>2026-11-02T10:59:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-and-number-geometric-distribution/sssssj4k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-and-number-geometric-distribution/sssssj4k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-and-number-geometric-distribution/sssssj4k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-and-number-geometric-distribution/sssssj4k"/>
      <lastmod>2026-11-02T18:55:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-and-number-geometric-distribution/sssssj4k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-and-number-geometric-distribution/sssssj4k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-and-number-geometric-distribution/sssssj4k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-and-number-geometric-distribution/sssssj4k"/>
      <lastmod>2026-11-02T18:55:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/determining-exact-values-of-trig-ratios/sssssj4z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/determining-exact-values-of-trig-ratios/sssssj4z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/determining-exact-values-of-trig-ratios/sssssj4z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/determining-exact-values-of-trig-ratios/sssssj4z"/>
      <lastmod>2026-11-02T18:39:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/determining-exact-values-of-trig-ratios/sssssj4z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/determining-exact-values-of-trig-ratios/sssssj4z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/determining-exact-values-of-trig-ratios/sssssj4z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/determining-exact-values-of-trig-ratios/sssssj4z"/>
      <lastmod>2026-11-02T18:39:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plotting-parametric-curves-by-daryl-funk/sssssj40</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-parametric-curves-by-daryl-funk/sssssj40"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-parametric-curves-by-daryl-funk/sssssj40"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-parametric-curves-by-daryl-funk/sssssj40"/>
      <lastmod>2026-11-01T23:29:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plotting-parametric-curves-by-daryl-funk/sssssj40</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-parametric-curves-by-daryl-funk/sssssj40"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-parametric-curves-by-daryl-funk/sssssj40"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-parametric-curves-by-daryl-funk/sssssj40"/>
      <lastmod>2026-11-01T23:29:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-geometric-relationship-between-triangle-abc-and-points-d-u-m/sssssj4d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-geometric-relationship-between-triangle-abc-and-points-d-u-m/sssssj4d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-geometric-relationship-between-triangle-abc-and-points-d-u-m/sssssj4d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-geometric-relationship-between-triangle-abc-and-points-d-u-m/sssssj4d"/>
      <lastmod>2026-11-02T00:00:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-geometric-relationship-between-triangle-abc-and-points-d-u-m/sssssj4d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-geometric-relationship-between-triangle-abc-and-points-d-u-m/sssssj4d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-geometric-relationship-between-triangle-abc-and-points-d-u-m/sssssj4d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-geometric-relationship-between-triangle-abc-and-points-d-u-m/sssssj4d"/>
      <lastmod>2026-11-02T00:00:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/estimate-pi-using-monte-carlo-method/sssssj4f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimate-pi-using-monte-carlo-method/sssssj4f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimate-pi-using-monte-carlo-method/sssssj4f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimate-pi-using-monte-carlo-method/sssssj4f"/>
      <lastmod>2026-11-02T15:27:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/estimate-pi-using-monte-carlo-method/sssssj4f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimate-pi-using-monte-carlo-method/sssssj4f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimate-pi-using-monte-carlo-method/sssssj4f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimate-pi-using-monte-carlo-method/sssssj4f"/>
      <lastmod>2026-11-02T15:27:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/approximating-a-binomial-distribution-by-a-normal-distribution/sssssj48</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/approximating-a-binomial-distribution-by-a-normal-distribution/sssssj48"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/approximating-a-binomial-distribution-by-a-normal-distribution/sssssj48"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/approximating-a-binomial-distribution-by-a-normal-distribution/sssssj48"/>
      <lastmod>2026-11-02T09:35:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/approximating-a-binomial-distribution-by-a-normal-distribution/sssssj48</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/approximating-a-binomial-distribution-by-a-normal-distribution/sssssj48"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/approximating-a-binomial-distribution-by-a-normal-distribution/sssssj48"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/approximating-a-binomial-distribution-by-a-normal-distribution/sssssj48"/>
      <lastmod>2026-11-02T09:35:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sas-congruence/sssssj4u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sas-congruence/sssssj4u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sas-congruence/sssssj4u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sas-congruence/sssssj4u"/>
      <lastmod>2026-11-02T18:06:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sas-congruence/sssssj4u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sas-congruence/sssssj4u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sas-congruence/sssssj4u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sas-congruence/sssssj4u"/>
      <lastmod>2026-11-02T18:06:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/other-tiles-islamic-geometric-patterns-construction/sssssj45</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/other-tiles-islamic-geometric-patterns-construction/sssssj45"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/other-tiles-islamic-geometric-patterns-construction/sssssj45"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/other-tiles-islamic-geometric-patterns-construction/sssssj45"/>
      <lastmod>2026-11-01T21:07:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/other-tiles-islamic-geometric-patterns-construction/sssssj45</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/other-tiles-islamic-geometric-patterns-construction/sssssj45"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/other-tiles-islamic-geometric-patterns-construction/sssssj45"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/other-tiles-islamic-geometric-patterns-construction/sssssj45"/>
      <lastmod>2026-11-01T21:07:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-functions-by-eugene-kritchevski/sssssj4b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-functions-by-eugene-kritchevski/sssssj4b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-functions-by-eugene-kritchevski/sssssj4b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-functions-by-eugene-kritchevski/sssssj4b"/>
      <lastmod>2026-11-02T15:18:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-functions-by-eugene-kritchevski/sssssj4b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-functions-by-eugene-kritchevski/sssssj4b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-functions-by-eugene-kritchevski/sssssj4b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-functions-by-eugene-kritchevski/sssssj4b"/>
      <lastmod>2026-11-02T15:18:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/height-in-a-parallelogram/sssssj43</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/height-in-a-parallelogram/sssssj43"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/height-in-a-parallelogram/sssssj43"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/height-in-a-parallelogram/sssssj43"/>
      <lastmod>2026-11-02T11:48:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/height-in-a-parallelogram/sssssj43</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/height-in-a-parallelogram/sssssj43"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/height-in-a-parallelogram/sssssj43"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/height-in-a-parallelogram/sssssj43"/>
      <lastmod>2026-11-02T11:48:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lines-planes-vector-forms-in-3d-space/sssssj4q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lines-planes-vector-forms-in-3d-space/sssssj4q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lines-planes-vector-forms-in-3d-space/sssssj4q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lines-planes-vector-forms-in-3d-space/sssssj4q"/>
      <lastmod>2026-11-02T17:39:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lines-planes-vector-forms-in-3d-space/sssssj4q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lines-planes-vector-forms-in-3d-space/sssssj4q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lines-planes-vector-forms-in-3d-space/sssssj4q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lines-planes-vector-forms-in-3d-space/sssssj4q"/>
      <lastmod>2026-11-02T17:39:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/algebra-2-evaluating-logarithmic-functions-mini-quiz-by-bencvu/sssssj41</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebra-2-evaluating-logarithmic-functions-mini-quiz-by-bencvu/sssssj41"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebra-2-evaluating-logarithmic-functions-mini-quiz-by-bencvu/sssssj41"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebra-2-evaluating-logarithmic-functions-mini-quiz-by-bencvu/sssssj41"/>
      <lastmod>2026-11-02T08:34:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/algebra-2-evaluating-logarithmic-functions-mini-quiz-by-bencvu/sssssj41</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebra-2-evaluating-logarithmic-functions-mini-quiz-by-bencvu/sssssj41"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebra-2-evaluating-logarithmic-functions-mini-quiz-by-bencvu/sssssj41"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebra-2-evaluating-logarithmic-functions-mini-quiz-by-bencvu/sssssj41"/>
      <lastmod>2026-11-02T08:34:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/riemann-sum-and-definite-integral-by-edurne-guerrero/sssssj4m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-sum-and-definite-integral-by-edurne-guerrero/sssssj4m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-sum-and-definite-integral-by-edurne-guerrero/sssssj4m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-sum-and-definite-integral-by-edurne-guerrero/sssssj4m"/>
      <lastmod>2026-11-02T17:15:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/riemann-sum-and-definite-integral-by-edurne-guerrero/sssssj4m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-sum-and-definite-integral-by-edurne-guerrero/sssssj4m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-sum-and-definite-integral-by-edurne-guerrero/sssssj4m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-sum-and-definite-integral-by-edurne-guerrero/sssssj4m"/>
      <lastmod>2026-11-02T17:15:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ratios-scale-and-proportion/sssssj4j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratios-scale-and-proportion/sssssj4j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratios-scale-and-proportion/sssssj4j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratios-scale-and-proportion/sssssj4j"/>
      <lastmod>2026-11-02T18:06:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ratios-scale-and-proportion/sssssj4j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratios-scale-and-proportion/sssssj4j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratios-scale-and-proportion/sssssj4j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratios-scale-and-proportion/sssssj4j"/>
      <lastmod>2026-11-02T18:06:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-intuition-of-complex-number-multiplication/sssssj4p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-intuition-of-complex-number-multiplication/sssssj4p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-intuition-of-complex-number-multiplication/sssssj4p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-intuition-of-complex-number-multiplication/sssssj4p"/>
      <lastmod>2026-11-02T03:05:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-intuition-of-complex-number-multiplication/sssssj4p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-intuition-of-complex-number-multiplication/sssssj4p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-intuition-of-complex-number-multiplication/sssssj4p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-intuition-of-complex-number-multiplication/sssssj4p"/>
      <lastmod>2026-11-02T03:05:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/between-ness-in-multiplication-division/sssssj4w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/between-ness-in-multiplication-division/sssssj4w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/between-ness-in-multiplication-division/sssssj4w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/between-ness-in-multiplication-division/sssssj4w"/>
      <lastmod>2026-11-02T17:15:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/between-ness-in-multiplication-division/sssssj4w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/between-ness-in-multiplication-division/sssssj4w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/between-ness-in-multiplication-division/sssssj4w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/between-ness-in-multiplication-division/sssssj4w"/>
      <lastmod>2026-11-02T17:15:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangular-prism-pattern-geometric-construction-and-visualization/sssssj46</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-prism-pattern-geometric-construction-and-visualization/sssssj46"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-prism-pattern-geometric-construction-and-visualization/sssssj46"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-prism-pattern-geometric-construction-and-visualization/sssssj46"/>
      <lastmod>2026-11-02T17:48:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangular-prism-pattern-geometric-construction-and-visualization/sssssj46</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-prism-pattern-geometric-construction-and-visualization/sssssj46"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-prism-pattern-geometric-construction-and-visualization/sssssj46"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-prism-pattern-geometric-construction-and-visualization/sssssj46"/>
      <lastmod>2026-11-02T17:48:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-geometry-shortest-path-between-points-a-net-copy/sssssj4g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-geometry-shortest-path-between-points-a-net-copy/sssssj4g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-geometry-shortest-path-between-points-a-net-copy/sssssj4g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-geometry-shortest-path-between-points-a-net-copy/sssssj4g"/>
      <lastmod>2026-11-02T03:08:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-geometry-shortest-path-between-points-a-net-copy/sssssj4g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-geometry-shortest-path-between-points-a-net-copy/sssssj4g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-geometry-shortest-path-between-points-a-net-copy/sssssj4g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-geometry-shortest-path-between-points-a-net-copy/sssssj4g"/>
      <lastmod>2026-11-02T03:08:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/split-torus/sssssj49</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/split-torus/sssssj49"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/split-torus/sssssj49"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/split-torus/sssssj49"/>
      <lastmod>2026-11-02T15:43:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/split-torus/sssssj49</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/split-torus/sssssj49"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/split-torus/sssssj49"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/split-torus/sssssj49"/>
      <lastmod>2026-11-02T15:43:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-definition-of-derivative/sssssj4e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-definition-of-derivative/sssssj4e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-definition-of-derivative/sssssj4e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-definition-of-derivative/sssssj4e"/>
      <lastmod>2026-11-02T00:12:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-definition-of-derivative/sssssj4e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-definition-of-derivative/sssssj4e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-definition-of-derivative/sssssj4e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-definition-of-derivative/sssssj4e"/>
      <lastmod>2026-11-02T00:12:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/is-the-blue-shape-symmetrical/sssssj4v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/is-the-blue-shape-symmetrical/sssssj4v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/is-the-blue-shape-symmetrical/sssssj4v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/is-the-blue-shape-symmetrical/sssssj4v"/>
      <lastmod>2026-11-01T21:26:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/is-the-blue-shape-symmetrical/sssssj4v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/is-the-blue-shape-symmetrical/sssssj4v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/is-the-blue-shape-symmetrical/sssssj4v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/is-the-blue-shape-symmetrical/sssssj4v"/>
      <lastmod>2026-11-01T21:26:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-template-exploratory-investigation/sssssj44</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-template-exploratory-investigation/sssssj44"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-template-exploratory-investigation/sssssj44"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-template-exploratory-investigation/sssssj44"/>
      <lastmod>2026-11-02T16:41:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-template-exploratory-investigation/sssssj44</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-template-exploratory-investigation/sssssj44"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-template-exploratory-investigation/sssssj44"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-template-exploratory-investigation/sssssj44"/>
      <lastmod>2026-11-02T16:41:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/radian-exploration-30-degree-increments/sssssj4l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/radian-exploration-30-degree-increments/sssssj4l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/radian-exploration-30-degree-increments/sssssj4l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/radian-exploration-30-degree-increments/sssssj4l"/>
      <lastmod>2026-11-02T13:01:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/radian-exploration-30-degree-increments/sssssj4l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/radian-exploration-30-degree-increments/sssssj4l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/radian-exploration-30-degree-increments/sssssj4l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/radian-exploration-30-degree-increments/sssssj4l"/>
      <lastmod>2026-11-02T13:01:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-construction-demo/sssssj4y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-construction-demo/sssssj4y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-construction-demo/sssssj4y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-construction-demo/sssssj4y"/>
      <lastmod>2026-11-01T23:30:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-construction-demo/sssssj4y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-construction-demo/sssssj4y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-construction-demo/sssssj4y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-construction-demo/sssssj4y"/>
      <lastmod>2026-11-01T23:30:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/behavior-of-square-root-functions/sssssj4a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/behavior-of-square-root-functions/sssssj4a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/behavior-of-square-root-functions/sssssj4a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/behavior-of-square-root-functions/sssssj4a"/>
      <lastmod>2026-11-01T23:47:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/behavior-of-square-root-functions/sssssj4a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/behavior-of-square-root-functions/sssssj4a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/behavior-of-square-root-functions/sssssj4a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/behavior-of-square-root-functions/sssssj4a"/>
      <lastmod>2026-11-01T23:47:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-around-a-point/sssssj4c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-around-a-point/sssssj4c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-around-a-point/sssssj4c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-around-a-point/sssssj4c"/>
      <lastmod>2026-11-01T19:14:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-around-a-point/sssssj4c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-around-a-point/sssssj4c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-around-a-point/sssssj4c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-around-a-point/sssssj4c"/>
      <lastmod>2026-11-01T19:14:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-parallelograms-and-triangles/sssssj4r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-parallelograms-and-triangles/sssssj4r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-parallelograms-and-triangles/sssssj4r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-parallelograms-and-triangles/sssssj4r"/>
      <lastmod>2026-11-02T16:55:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-parallelograms-and-triangles/sssssj4r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-parallelograms-and-triangles/sssssj4r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-parallelograms-and-triangles/sssssj4r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-parallelograms-and-triangles/sssssj4r"/>
      <lastmod>2026-11-02T16:55:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-infernal-pyramid/sssssj4h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-infernal-pyramid/sssssj4h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-infernal-pyramid/sssssj4h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-infernal-pyramid/sssssj4h"/>
      <lastmod>2026-11-02T10:49:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-infernal-pyramid/sssssj4h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-infernal-pyramid/sssssj4h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-infernal-pyramid/sssssj4h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-infernal-pyramid/sssssj4h"/>
      <lastmod>2026-11-02T10:49:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-revolution-by-mark-willis/sssssj4t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-by-mark-willis/sssssj4t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-by-mark-willis/sssssj4t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-by-mark-willis/sssssj4t"/>
      <lastmod>2026-11-02T18:21:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-revolution-by-mark-willis/sssssj4t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-by-mark-willis/sssssj4t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-by-mark-willis/sssssj4t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-by-mark-willis/sssssj4t"/>
      <lastmod>2026-11-02T18:21:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definition-of-the-derivative-i/sssssj4x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-of-the-derivative-i/sssssj4x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-of-the-derivative-i/sssssj4x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-of-the-derivative-i/sssssj4x"/>
      <lastmod>2026-11-02T09:27:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definition-of-the-derivative-i/sssssj4x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-of-the-derivative-i/sssssj4x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-of-the-derivative-i/sssssj4x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-of-the-derivative-i/sssssj4x"/>
      <lastmod>2026-11-02T09:27:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spiraling-polygons-a-dynamic-sequence-of-rotated-and-scaled-shapes/sssssj4i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiraling-polygons-a-dynamic-sequence-of-rotated-and-scaled-shapes/sssssj4i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiraling-polygons-a-dynamic-sequence-of-rotated-and-scaled-shapes/sssssj4i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiraling-polygons-a-dynamic-sequence-of-rotated-and-scaled-shapes/sssssj4i"/>
      <lastmod>2026-11-02T11:50:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spiraling-polygons-a-dynamic-sequence-of-rotated-and-scaled-shapes/sssssj4i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiraling-polygons-a-dynamic-sequence-of-rotated-and-scaled-shapes/sssssj4i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiraling-polygons-a-dynamic-sequence-of-rotated-and-scaled-shapes/sssssj4i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiraling-polygons-a-dynamic-sequence-of-rotated-and-scaled-shapes/sssssj4i"/>
      <lastmod>2026-11-02T11:50:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualize-measures-of-center-and-spread/sssssj4o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualize-measures-of-center-and-spread/sssssj4o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualize-measures-of-center-and-spread/sssssj4o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualize-measures-of-center-and-spread/sssssj4o"/>
      <lastmod>2026-11-02T11:44:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualize-measures-of-center-and-spread/sssssj4o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualize-measures-of-center-and-spread/sssssj4o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualize-measures-of-center-and-spread/sssssj4o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualize-measures-of-center-and-spread/sssssj4o"/>
      <lastmod>2026-11-02T11:44:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/regression-polynomial-and-sine-fitting-with-geogebra/sssssjls</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regression-polynomial-and-sine-fitting-with-geogebra/sssssjls"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regression-polynomial-and-sine-fitting-with-geogebra/sssssjls"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regression-polynomial-and-sine-fitting-with-geogebra/sssssjls"/>
      <lastmod>2026-11-02T02:38:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/regression-polynomial-and-sine-fitting-with-geogebra/sssssjls</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regression-polynomial-and-sine-fitting-with-geogebra/sssssjls"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regression-polynomial-and-sine-fitting-with-geogebra/sssssjls"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regression-polynomial-and-sine-fitting-with-geogebra/sssssjls"/>
      <lastmod>2026-11-02T02:38:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-congruence-side-angle-side/sssssjl7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-congruence-side-angle-side/sssssjl7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-congruence-side-angle-side/sssssjl7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-congruence-side-angle-side/sssssjl7"/>
      <lastmod>2026-11-02T03:17:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-congruence-side-angle-side/sssssjl7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-congruence-side-angle-side/sssssjl7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-congruence-side-angle-side/sssssjl7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-congruence-side-angle-side/sssssjl7"/>
      <lastmod>2026-11-02T03:17:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/octagon-medians-construction/sssssjln</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/octagon-medians-construction/sssssjln"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/octagon-medians-construction/sssssjln"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/octagon-medians-construction/sssssjln"/>
      <lastmod>2026-11-01T21:04:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/octagon-medians-construction/sssssjln</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/octagon-medians-construction/sssssjln"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/octagon-medians-construction/sssssjln"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/octagon-medians-construction/sssssjln"/>
      <lastmod>2026-11-01T21:04:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/using-diagrams-to-represent-multiplication-by-geogebra-classroom-activities/sssssjl2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-diagrams-to-represent-multiplication-by-geogebra-classroom-activities/sssssjl2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-diagrams-to-represent-multiplication-by-geogebra-classroom-activities/sssssjl2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-diagrams-to-represent-multiplication-by-geogebra-classroom-activities/sssssjl2"/>
      <lastmod>2026-11-02T10:36:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/using-diagrams-to-represent-multiplication-by-geogebra-classroom-activities/sssssjl2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-diagrams-to-represent-multiplication-by-geogebra-classroom-activities/sssssjl2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-diagrams-to-represent-multiplication-by-geogebra-classroom-activities/sssssjl2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-diagrams-to-represent-multiplication-by-geogebra-classroom-activities/sssssjl2"/>
      <lastmod>2026-11-02T10:36:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/roots-of-an-absolute-value-equation/sssssjlk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roots-of-an-absolute-value-equation/sssssjlk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roots-of-an-absolute-value-equation/sssssjlk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roots-of-an-absolute-value-equation/sssssjlk"/>
      <lastmod>2026-11-02T02:41:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/roots-of-an-absolute-value-equation/sssssjlk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roots-of-an-absolute-value-equation/sssssjlk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roots-of-an-absolute-value-equation/sssssjlk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roots-of-an-absolute-value-equation/sssssjlk"/>
      <lastmod>2026-11-02T02:41:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-positive-and-negative-integers-on-a-number-line/sssssjlz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-positive-and-negative-integers-on-a-number-line/sssssjlz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-positive-and-negative-integers-on-a-number-line/sssssjlz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-positive-and-negative-integers-on-a-number-line/sssssjlz"/>
      <lastmod>2026-11-02T18:56:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-positive-and-negative-integers-on-a-number-line/sssssjlz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-positive-and-negative-integers-on-a-number-line/sssssjlz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-positive-and-negative-integers-on-a-number-line/sssssjlz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-positive-and-negative-integers-on-a-number-line/sssssjlz"/>
      <lastmod>2026-11-02T18:56:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-k-for-real-roots-of-a-quadratic/sssssjl0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-k-for-real-roots-of-a-quadratic/sssssjl0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-k-for-real-roots-of-a-quadratic/sssssjl0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-k-for-real-roots-of-a-quadratic/sssssjl0"/>
      <lastmod>2026-11-02T17:58:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-k-for-real-roots-of-a-quadratic/sssssjl0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-k-for-real-roots-of-a-quadratic/sssssjl0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-k-for-real-roots-of-a-quadratic/sssssjl0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-k-for-real-roots-of-a-quadratic/sssssjl0"/>
      <lastmod>2026-11-02T17:58:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/compare-fractions-to-one-interactive-visual-practice/sssssjld</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-fractions-to-one-interactive-visual-practice/sssssjld"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-fractions-to-one-interactive-visual-practice/sssssjld"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-fractions-to-one-interactive-visual-practice/sssssjld"/>
      <lastmod>2026-11-01T20:52:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/compare-fractions-to-one-interactive-visual-practice/sssssjld</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-fractions-to-one-interactive-visual-practice/sssssjld"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-fractions-to-one-interactive-visual-practice/sssssjld"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-fractions-to-one-interactive-visual-practice/sssssjld"/>
      <lastmod>2026-11-01T20:52:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/double-integral-volume-demo-by-rasha-tarek/sssssjlf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-integral-volume-demo-by-rasha-tarek/sssssjlf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-integral-volume-demo-by-rasha-tarek/sssssjlf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-integral-volume-demo-by-rasha-tarek/sssssjlf"/>
      <lastmod>2026-11-01T19:26:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/double-integral-volume-demo-by-rasha-tarek/sssssjlf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-integral-volume-demo-by-rasha-tarek/sssssjlf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-integral-volume-demo-by-rasha-tarek/sssssjlf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-integral-volume-demo-by-rasha-tarek/sssssjlf"/>
      <lastmod>2026-11-01T19:26:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-the-axis-of-symmetry-standard-form/sssssjl8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-the-axis-of-symmetry-standard-form/sssssjl8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-the-axis-of-symmetry-standard-form/sssssjl8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-the-axis-of-symmetry-standard-form/sssssjl8"/>
      <lastmod>2026-11-01T20:55:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-the-axis-of-symmetry-standard-form/sssssjl8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-the-axis-of-symmetry-standard-form/sssssjl8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-the-axis-of-symmetry-standard-form/sssssjl8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-the-axis-of-symmetry-standard-form/sssssjl8"/>
      <lastmod>2026-11-01T20:55:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-tangent/sssssjlu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-tangent/sssssjlu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-tangent/sssssjlu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-tangent/sssssjlu"/>
      <lastmod>2026-11-02T11:57:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-tangent/sssssjlu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-tangent/sssssjlu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-tangent/sssssjlu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-tangent/sssssjlu"/>
      <lastmod>2026-11-02T11:57:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-prism-nets/sssssjl5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-prism-nets/sssssjl5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-prism-nets/sssssjl5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-prism-nets/sssssjl5"/>
      <lastmod>2026-11-01T23:44:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-prism-nets/sssssjl5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-prism-nets/sssssjl5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-prism-nets/sssssjl5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-prism-nets/sssssjl5"/>
      <lastmod>2026-11-01T23:44:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangular-hyperbola/sssssjlb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-hyperbola/sssssjlb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-hyperbola/sssssjlb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-hyperbola/sssssjlb"/>
      <lastmod>2026-11-02T17:41:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangular-hyperbola/sssssjlb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-hyperbola/sssssjlb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-hyperbola/sssssjlb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-hyperbola/sssssjlb"/>
      <lastmod>2026-11-02T17:41:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-circular-cluster-model/sssssjl3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-circular-cluster-model/sssssjl3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-circular-cluster-model/sssssjl3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-circular-cluster-model/sssssjl3"/>
      <lastmod>2026-11-02T10:40:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-circular-cluster-model/sssssjl3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-circular-cluster-model/sssssjl3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-circular-cluster-model/sssssjl3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-circular-cluster-model/sssssjl3"/>
      <lastmod>2026-11-02T10:40:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arithmetic-and-geometric-series/sssssjlq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-and-geometric-series/sssssjlq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-and-geometric-series/sssssjlq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-and-geometric-series/sssssjlq"/>
      <lastmod>2026-11-01T21:37:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arithmetic-and-geometric-series/sssssjlq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-and-geometric-series/sssssjlq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-and-geometric-series/sssssjlq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-and-geometric-series/sssssjlq"/>
      <lastmod>2026-11-01T21:37:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/regular-polygon-to-circle-area-perimeter/sssssjl1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-polygon-to-circle-area-perimeter/sssssjl1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-polygon-to-circle-area-perimeter/sssssjl1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-polygon-to-circle-area-perimeter/sssssjl1"/>
      <lastmod>2026-11-02T18:19:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/regular-polygon-to-circle-area-perimeter/sssssjl1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-polygon-to-circle-area-perimeter/sssssjl1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-polygon-to-circle-area-perimeter/sssssjl1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-polygon-to-circle-area-perimeter/sssssjl1"/>
      <lastmod>2026-11-02T18:19:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-equation-application-perimeter-of-a-rectangle/sssssjlm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equation-application-perimeter-of-a-rectangle/sssssjlm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equation-application-perimeter-of-a-rectangle/sssssjlm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equation-application-perimeter-of-a-rectangle/sssssjlm"/>
      <lastmod>2026-11-02T16:34:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-equation-application-perimeter-of-a-rectangle/sssssjlm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equation-application-perimeter-of-a-rectangle/sssssjlm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equation-application-perimeter-of-a-rectangle/sssssjlm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equation-application-perimeter-of-a-rectangle/sssssjlm"/>
      <lastmod>2026-11-02T16:34:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-the-center-of-dilation/sssssjlj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-the-center-of-dilation/sssssjlj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-the-center-of-dilation/sssssjlj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-the-center-of-dilation/sssssjlj"/>
      <lastmod>2026-11-02T09:56:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-the-center-of-dilation/sssssjlj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-the-center-of-dilation/sssssjlj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-the-center-of-dilation/sssssjlj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-the-center-of-dilation/sssssjlj"/>
      <lastmod>2026-11-02T09:56:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/guess-the-circumcenter/sssssjlp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/guess-the-circumcenter/sssssjlp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/guess-the-circumcenter/sssssjlp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/guess-the-circumcenter/sssssjlp"/>
      <lastmod>2026-11-02T02:12:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/guess-the-circumcenter/sssssjlp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/guess-the-circumcenter/sssssjlp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/guess-the-circumcenter/sssssjlp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/guess-the-circumcenter/sssssjlp"/>
      <lastmod>2026-11-02T02:12:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-ratio-demo/sssssjlw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-ratio-demo/sssssjlw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-ratio-demo/sssssjlw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-ratio-demo/sssssjlw"/>
      <lastmod>2026-11-02T03:15:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-ratio-demo/sssssjlw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-ratio-demo/sssssjlw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-ratio-demo/sssssjlw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-ratio-demo/sssssjlw"/>
      <lastmod>2026-11-02T03:15:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-integers-game/sssssjl6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-integers-game/sssssjl6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-integers-game/sssssjl6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-integers-game/sssssjl6"/>
      <lastmod>2026-11-02T12:24:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-integers-game/sssssjl6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-integers-game/sssssjl6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-integers-game/sssssjl6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-integers-game/sssssjl6"/>
      <lastmod>2026-11-02T12:24:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-design-mg-ro/sssssjlg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-design-mg-ro/sssssjlg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-design-mg-ro/sssssjlg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-design-mg-ro/sssssjlg"/>
      <lastmod>2026-11-02T18:35:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-design-mg-ro/sssssjlg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-design-mg-ro/sssssjlg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-design-mg-ro/sssssjlg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-design-mg-ro/sssssjlg"/>
      <lastmod>2026-11-02T18:35:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cross-section-of-a-square-pyramid/sssssjl9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-section-of-a-square-pyramid/sssssjl9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-section-of-a-square-pyramid/sssssjl9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-section-of-a-square-pyramid/sssssjl9"/>
      <lastmod>2026-11-01T19:18:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cross-section-of-a-square-pyramid/sssssjl9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-section-of-a-square-pyramid/sssssjl9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-section-of-a-square-pyramid/sssssjl9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-section-of-a-square-pyramid/sssssjl9"/>
      <lastmod>2026-11-01T19:18:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadrilateral-pyramid-construction/sssssjle</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-pyramid-construction/sssssjle"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-pyramid-construction/sssssjle"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-pyramid-construction/sssssjle"/>
      <lastmod>2026-11-01T23:57:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadrilateral-pyramid-construction/sssssjle</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-pyramid-construction/sssssjle"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-pyramid-construction/sssssjle"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-pyramid-construction/sssssjle"/>
      <lastmod>2026-11-01T23:57:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sum-of-external-angles-of-a-polygon-a-visual-proof/sssssjlv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-external-angles-of-a-polygon-a-visual-proof/sssssjlv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-external-angles-of-a-polygon-a-visual-proof/sssssjlv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-external-angles-of-a-polygon-a-visual-proof/sssssjlv"/>
      <lastmod>2026-11-01T19:37:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sum-of-external-angles-of-a-polygon-a-visual-proof/sssssjlv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-external-angles-of-a-polygon-a-visual-proof/sssssjlv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-external-angles-of-a-polygon-a-visual-proof/sssssjlv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-external-angles-of-a-polygon-a-visual-proof/sssssjlv"/>
      <lastmod>2026-11-01T19:37:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slicing-a-cylinder-in-rotation-to-get-a-sine-function/sssssjl4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slicing-a-cylinder-in-rotation-to-get-a-sine-function/sssssjl4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slicing-a-cylinder-in-rotation-to-get-a-sine-function/sssssjl4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slicing-a-cylinder-in-rotation-to-get-a-sine-function/sssssjl4"/>
      <lastmod>2026-11-01T20:52:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slicing-a-cylinder-in-rotation-to-get-a-sine-function/sssssjl4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slicing-a-cylinder-in-rotation-to-get-a-sine-function/sssssjl4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slicing-a-cylinder-in-rotation-to-get-a-sine-function/sssssjl4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slicing-a-cylinder-in-rotation-to-get-a-sine-function/sssssjl4"/>
      <lastmod>2026-11-01T20:52:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rgb-scheme-with-modulus-and-phase/sssssjll</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rgb-scheme-with-modulus-and-phase/sssssjll"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rgb-scheme-with-modulus-and-phase/sssssjll"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rgb-scheme-with-modulus-and-phase/sssssjll"/>
      <lastmod>2026-11-01T21:05:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rgb-scheme-with-modulus-and-phase/sssssjll</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rgb-scheme-with-modulus-and-phase/sssssjll"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rgb-scheme-with-modulus-and-phase/sssssjll"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rgb-scheme-with-modulus-and-phase/sssssjll"/>
      <lastmod>2026-11-01T21:05:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-visualizer/sssssjly</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-visualizer/sssssjly"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-visualizer/sssssjly"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-visualizer/sssssjly"/>
      <lastmod>2026-11-01T19:14:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-visualizer/sssssjly</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-visualizer/sssssjly"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-visualizer/sssssjly"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-visualizer/sssssjly"/>
      <lastmod>2026-11-01T19:14:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-of-power-rule-for-logarithms/sssssjla</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-power-rule-for-logarithms/sssssjla"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-power-rule-for-logarithms/sssssjla"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-power-rule-for-logarithms/sssssjla"/>
      <lastmod>2026-11-02T07:01:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-of-power-rule-for-logarithms/sssssjla</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-power-rule-for-logarithms/sssssjla"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-power-rule-for-logarithms/sssssjla"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-power-rule-for-logarithms/sssssjla"/>
      <lastmod>2026-11-02T07:01:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coronavirus-2020-exponential-growth-copy/sssssjlc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coronavirus-2020-exponential-growth-copy/sssssjlc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coronavirus-2020-exponential-growth-copy/sssssjlc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coronavirus-2020-exponential-growth-copy/sssssjlc"/>
      <lastmod>2026-11-01T19:05:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coronavirus-2020-exponential-growth-copy/sssssjlc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coronavirus-2020-exponential-growth-copy/sssssjlc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coronavirus-2020-exponential-growth-copy/sssssjlc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coronavirus-2020-exponential-growth-copy/sssssjlc"/>
      <lastmod>2026-11-01T19:05:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-the-derivation-of-sine-cosine-and-tangent-functions/sssssjlr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-the-derivation-of-sine-cosine-and-tangent-functions/sssssjlr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-the-derivation-of-sine-cosine-and-tangent-functions/sssssjlr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-the-derivation-of-sine-cosine-and-tangent-functions/sssssjlr"/>
      <lastmod>2026-11-02T00:45:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-the-derivation-of-sine-cosine-and-tangent-functions/sssssjlr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-the-derivation-of-sine-cosine-and-tangent-functions/sssssjlr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-the-derivation-of-sine-cosine-and-tangent-functions/sssssjlr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-the-derivation-of-sine-cosine-and-tangent-functions/sssssjlr"/>
      <lastmod>2026-11-02T00:45:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translations-of-absolute-value-graphs/sssssjlh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translations-of-absolute-value-graphs/sssssjlh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translations-of-absolute-value-graphs/sssssjlh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translations-of-absolute-value-graphs/sssssjlh"/>
      <lastmod>2026-11-01T21:18:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translations-of-absolute-value-graphs/sssssjlh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translations-of-absolute-value-graphs/sssssjlh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translations-of-absolute-value-graphs/sssssjlh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translations-of-absolute-value-graphs/sssssjlh"/>
      <lastmod>2026-11-01T21:18:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tetrahedron-interactive-model/sssssjlt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tetrahedron-interactive-model/sssssjlt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tetrahedron-interactive-model/sssssjlt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tetrahedron-interactive-model/sssssjlt"/>
      <lastmod>2026-11-02T09:45:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tetrahedron-interactive-model/sssssjlt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tetrahedron-interactive-model/sssssjlt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tetrahedron-interactive-model/sssssjlt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tetrahedron-interactive-model/sssssjlt"/>
      <lastmod>2026-11-02T09:45:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-polynomials/sssssjlx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-polynomials/sssssjlx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-polynomials/sssssjlx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-polynomials/sssssjlx"/>
      <lastmod>2026-11-01T21:09:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-polynomials/sssssjlx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-polynomials/sssssjlx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-polynomials/sssssjlx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-polynomials/sssssjlx"/>
      <lastmod>2026-11-01T21:09:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-characteristics-of-coefficients-in-a-general-quadratic-function/sssssjli</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-characteristics-of-coefficients-in-a-general-quadratic-function/sssssjli"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-characteristics-of-coefficients-in-a-general-quadratic-function/sssssjli"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-characteristics-of-coefficients-in-a-general-quadratic-function/sssssjli"/>
      <lastmod>2026-11-01T23:10:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-characteristics-of-coefficients-in-a-general-quadratic-function/sssssjli</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-characteristics-of-coefficients-in-a-general-quadratic-function/sssssjli"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-characteristics-of-coefficients-in-a-general-quadratic-function/sssssjli"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-characteristics-of-coefficients-in-a-general-quadratic-function/sssssjli"/>
      <lastmod>2026-11-01T23:10:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-transformational-geometry-by-russell-maciag/sssssjlo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-transformational-geometry-by-russell-maciag/sssssjlo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-transformational-geometry-by-russell-maciag/sssssjlo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-transformational-geometry-by-russell-maciag/sssssjlo"/>
      <lastmod>2026-11-02T09:55:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-transformational-geometry-by-russell-maciag/sssssjlo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-transformational-geometry-by-russell-maciag/sssssjlo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-transformational-geometry-by-russell-maciag/sssssjlo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-transformational-geometry-by-russell-maciag/sssssjlo"/>
      <lastmod>2026-11-02T09:55:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-number-for-5-points/sssssjys</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-number-for-5-points/sssssjys"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-number-for-5-points/sssssjys"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-number-for-5-points/sssssjys"/>
      <lastmod>2026-11-01T22:00:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-number-for-5-points/sssssjys</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-number-for-5-points/sssssjys"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-number-for-5-points/sssssjys"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-number-for-5-points/sssssjys"/>
      <lastmod>2026-11-01T22:00:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-fractions/sssssjy7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-fractions/sssssjy7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-fractions/sssssjy7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-fractions/sssssjy7"/>
      <lastmod>2026-11-02T09:46:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-fractions/sssssjy7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-fractions/sssssjy7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-fractions/sssssjy7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-fractions/sssssjy7"/>
      <lastmod>2026-11-02T09:46:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/using-equations-to-solve-problems-im-7-6-11-lesson/sssssjyn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-equations-to-solve-problems-im-7-6-11-lesson/sssssjyn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-equations-to-solve-problems-im-7-6-11-lesson/sssssjyn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-equations-to-solve-problems-im-7-6-11-lesson/sssssjyn"/>
      <lastmod>2026-11-02T10:36:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/using-equations-to-solve-problems-im-7-6-11-lesson/sssssjyn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-equations-to-solve-problems-im-7-6-11-lesson/sssssjyn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-equations-to-solve-problems-im-7-6-11-lesson/sssssjyn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-equations-to-solve-problems-im-7-6-11-lesson/sssssjyn"/>
      <lastmod>2026-11-02T10:36:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ln-as-limit-of-root-and-reciprocal-functions/sssssjy2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ln-as-limit-of-root-and-reciprocal-functions/sssssjy2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ln-as-limit-of-root-and-reciprocal-functions/sssssjy2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ln-as-limit-of-root-and-reciprocal-functions/sssssjy2"/>
      <lastmod>2026-11-02T16:55:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ln-as-limit-of-root-and-reciprocal-functions/sssssjy2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ln-as-limit-of-root-and-reciprocal-functions/sssssjy2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ln-as-limit-of-root-and-reciprocal-functions/sssssjy2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ln-as-limit-of-root-and-reciprocal-functions/sssssjy2"/>
      <lastmod>2026-11-02T16:55:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gauss-law-planar-symmetry-demonstration/sssssjyk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gauss-law-planar-symmetry-demonstration/sssssjyk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gauss-law-planar-symmetry-demonstration/sssssjyk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gauss-law-planar-symmetry-demonstration/sssssjyk"/>
      <lastmod>2026-11-02T17:48:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gauss-law-planar-symmetry-demonstration/sssssjyk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gauss-law-planar-symmetry-demonstration/sssssjyk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gauss-law-planar-symmetry-demonstration/sssssjyk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gauss-law-planar-symmetry-demonstration/sssssjyk"/>
      <lastmod>2026-11-02T17:48:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-demonstration-of-plane-equation/sssssjyz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-plane-equation/sssssjyz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-plane-equation/sssssjyz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-plane-equation/sssssjyz"/>
      <lastmod>2026-11-01T21:27:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-demonstration-of-plane-equation/sssssjyz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-plane-equation/sssssjyz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-plane-equation/sssssjyz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-plane-equation/sssssjyz"/>
      <lastmod>2026-11-01T21:27:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-and-scaling-transformation-graph/sssssjy0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-and-scaling-transformation-graph/sssssjy0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-and-scaling-transformation-graph/sssssjy0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-and-scaling-transformation-graph/sssssjy0"/>
      <lastmod>2026-11-01T20:57:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-and-scaling-transformation-graph/sssssjy0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-and-scaling-transformation-graph/sssssjy0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-and-scaling-transformation-graph/sssssjy0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-and-scaling-transformation-graph/sssssjy0"/>
      <lastmod>2026-11-01T20:57:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tape-diagrams-for-algebra-visualizing-equations-and-geometric-construction/sssssjyd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tape-diagrams-for-algebra-visualizing-equations-and-geometric-construction/sssssjyd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tape-diagrams-for-algebra-visualizing-equations-and-geometric-construction/sssssjyd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tape-diagrams-for-algebra-visualizing-equations-and-geometric-construction/sssssjyd"/>
      <lastmod>2026-11-02T18:33:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tape-diagrams-for-algebra-visualizing-equations-and-geometric-construction/sssssjyd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tape-diagrams-for-algebra-visualizing-equations-and-geometric-construction/sssssjyd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tape-diagrams-for-algebra-visualizing-equations-and-geometric-construction/sssssjyd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tape-diagrams-for-algebra-visualizing-equations-and-geometric-construction/sssssjyd"/>
      <lastmod>2026-11-02T18:33:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polynomial-long-division-demo/sssssjyf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-long-division-demo/sssssjyf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-long-division-demo/sssssjyf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-long-division-demo/sssssjyf"/>
      <lastmod>2026-11-02T13:35:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polynomial-long-division-demo/sssssjyf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-long-division-demo/sssssjyf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-long-division-demo/sssssjyf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-long-division-demo/sssssjyf"/>
      <lastmod>2026-11-02T13:35:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-equation-solver-generator/sssssjy8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equation-solver-generator/sssssjy8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equation-solver-generator/sssssjy8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equation-solver-generator/sssssjy8"/>
      <lastmod>2026-11-01T21:38:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-equation-solver-generator/sssssjy8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equation-solver-generator/sssssjy8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equation-solver-generator/sssssjy8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equation-solver-generator/sssssjy8"/>
      <lastmod>2026-11-01T21:38:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractal-geometry-substitution-tile/sssssjyu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractal-geometry-substitution-tile/sssssjyu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractal-geometry-substitution-tile/sssssjyu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractal-geometry-substitution-tile/sssssjyu"/>
      <lastmod>2026-11-01T23:30:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractal-geometry-substitution-tile/sssssjyu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractal-geometry-substitution-tile/sssssjyu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractal-geometry-substitution-tile/sssssjyu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractal-geometry-substitution-tile/sssssjyu"/>
      <lastmod>2026-11-01T23:30:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-isosceles-triangles-dynamic-construction-discovery/sssssjy5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-isosceles-triangles-dynamic-construction-discovery/sssssjy5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-isosceles-triangles-dynamic-construction-discovery/sssssjy5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-isosceles-triangles-dynamic-construction-discovery/sssssjy5"/>
      <lastmod>2026-11-01T21:52:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-isosceles-triangles-dynamic-construction-discovery/sssssjy5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-isosceles-triangles-dynamic-construction-discovery/sssssjy5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-isosceles-triangles-dynamic-construction-discovery/sssssjy5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-isosceles-triangles-dynamic-construction-discovery/sssssjy5"/>
      <lastmod>2026-11-01T21:52:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cuboid-shadow-and-section-construction/sssssjyb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cuboid-shadow-and-section-construction/sssssjyb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cuboid-shadow-and-section-construction/sssssjyb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cuboid-shadow-and-section-construction/sssssjyb"/>
      <lastmod>2026-11-01T21:53:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cuboid-shadow-and-section-construction/sssssjyb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cuboid-shadow-and-section-construction/sssssjyb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cuboid-shadow-and-section-construction/sssssjyb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cuboid-shadow-and-section-construction/sssssjyb"/>
      <lastmod>2026-11-01T21:53:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/one-parameter-family-of-lines-by-d-vasu-raj/sssssjy3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-parameter-family-of-lines-by-d-vasu-raj/sssssjy3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-parameter-family-of-lines-by-d-vasu-raj/sssssjy3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-parameter-family-of-lines-by-d-vasu-raj/sssssjy3"/>
      <lastmod>2026-11-02T17:42:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/one-parameter-family-of-lines-by-d-vasu-raj/sssssjy3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-parameter-family-of-lines-by-d-vasu-raj/sssssjy3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-parameter-family-of-lines-by-d-vasu-raj/sssssjy3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-parameter-family-of-lines-by-d-vasu-raj/sssssjy3"/>
      <lastmod>2026-11-02T17:42:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-fractions-preparation/sssssjyq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-fractions-preparation/sssssjyq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-fractions-preparation/sssssjyq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-fractions-preparation/sssssjyq"/>
      <lastmod>2026-11-01T19:28:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-fractions-preparation/sssssjyq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-fractions-preparation/sssssjyq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-fractions-preparation/sssssjyq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-fractions-preparation/sssssjyq"/>
      <lastmod>2026-11-01T19:28:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-investigation/sssssjy1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-investigation/sssssjy1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-investigation/sssssjy1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-investigation/sssssjy1"/>
      <lastmod>2026-11-02T18:38:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-investigation/sssssjy1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-investigation/sssssjy1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-investigation/sssssjy1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-investigation/sssssjy1"/>
      <lastmod>2026-11-02T18:38:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-a-sphere-by-kriti-singh/sssssjym</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-sphere-by-kriti-singh/sssssjym"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-sphere-by-kriti-singh/sssssjym"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-sphere-by-kriti-singh/sssssjym"/>
      <lastmod>2026-11-02T03:07:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-a-sphere-by-kriti-singh/sssssjym</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-sphere-by-kriti-singh/sssssjym"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-sphere-by-kriti-singh/sssssjym"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-sphere-by-kriti-singh/sssssjym"/>
      <lastmod>2026-11-02T03:07:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/special-right-triangles-by-karen-handy/sssssjyj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-right-triangles-by-karen-handy/sssssjyj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-right-triangles-by-karen-handy/sssssjyj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-right-triangles-by-karen-handy/sssssjyj"/>
      <lastmod>2026-11-02T17:09:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/special-right-triangles-by-karen-handy/sssssjyj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-right-triangles-by-karen-handy/sssssjyj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-right-triangles-by-karen-handy/sssssjyj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-right-triangles-by-karen-handy/sssssjyj"/>
      <lastmod>2026-11-02T17:09:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/satellite-dish-model/sssssjyp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/satellite-dish-model/sssssjyp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/satellite-dish-model/sssssjyp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/satellite-dish-model/sssssjyp"/>
      <lastmod>2026-11-02T16:35:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/satellite-dish-model/sssssjyp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/satellite-dish-model/sssssjyp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/satellite-dish-model/sssssjyp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/satellite-dish-model/sssssjyp"/>
      <lastmod>2026-11-02T16:35:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangles-squares-animation/sssssjyw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangles-squares-animation/sssssjyw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangles-squares-animation/sssssjyw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangles-squares-animation/sssssjyw"/>
      <lastmod>2026-11-02T02:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangles-squares-animation/sssssjyw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangles-squares-animation/sssssjyw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangles-squares-animation/sssssjyw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangles-squares-animation/sssssjyw"/>
      <lastmod>2026-11-02T02:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-a-torus/sssssjy6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-torus/sssssjy6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-torus/sssssjy6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-torus/sssssjy6"/>
      <lastmod>2026-11-02T16:33:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-a-torus/sssssjy6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-torus/sssssjy6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-torus/sssssjy6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-torus/sssssjy6"/>
      <lastmod>2026-11-02T16:33:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-pyramid-by-cemccourseware/sssssjyg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-pyramid-by-cemccourseware/sssssjyg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-pyramid-by-cemccourseware/sssssjyg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-pyramid-by-cemccourseware/sssssjyg"/>
      <lastmod>2026-11-02T00:21:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-a-pyramid-by-cemccourseware/sssssjyg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-pyramid-by-cemccourseware/sssssjyg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-pyramid-by-cemccourseware/sssssjyg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-pyramid-by-cemccourseware/sssssjyg"/>
      <lastmod>2026-11-02T00:21:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/light-refraction-and-dispersion/sssssjy9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/light-refraction-and-dispersion/sssssjy9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/light-refraction-and-dispersion/sssssjy9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/light-refraction-and-dispersion/sssssjy9"/>
      <lastmod>2026-11-01T23:51:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/light-refraction-and-dispersion/sssssjy9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/light-refraction-and-dispersion/sssssjy9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/light-refraction-and-dispersion/sssssjy9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/light-refraction-and-dispersion/sssssjy9"/>
      <lastmod>2026-11-01T23:51:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-matrix-and-trigonometry-demo/sssssjye</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-matrix-and-trigonometry-demo/sssssjye"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-matrix-and-trigonometry-demo/sssssjye"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-matrix-and-trigonometry-demo/sssssjye"/>
      <lastmod>2026-11-02T00:09:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-matrix-and-trigonometry-demo/sssssjye</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-matrix-and-trigonometry-demo/sssssjye"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-matrix-and-trigonometry-demo/sssssjye"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-matrix-and-trigonometry-demo/sssssjye"/>
      <lastmod>2026-11-02T00:09:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-in-satellite-dish-application/sssssjyv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-in-satellite-dish-application/sssssjyv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-in-satellite-dish-application/sssssjyv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-in-satellite-dish-application/sssssjyv"/>
      <lastmod>2026-11-02T00:33:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-in-satellite-dish-application/sssssjyv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-in-satellite-dish-application/sssssjyv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-in-satellite-dish-application/sssssjyv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-in-satellite-dish-application/sssssjyv"/>
      <lastmod>2026-11-02T00:33:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parametric-curves-and-right-triangles/sssssjy4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-curves-and-right-triangles/sssssjy4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-curves-and-right-triangles/sssssjy4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-curves-and-right-triangles/sssssjy4"/>
      <lastmod>2026-11-02T18:17:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parametric-curves-and-right-triangles/sssssjy4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-curves-and-right-triangles/sssssjy4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-curves-and-right-triangles/sssssjy4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-curves-and-right-triangles/sssssjy4"/>
      <lastmod>2026-11-02T18:17:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-transformations-polygon-rotation-and-dilation/sssssjyl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-polygon-rotation-and-dilation/sssssjyl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-polygon-rotation-and-dilation/sssssjyl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-polygon-rotation-and-dilation/sssssjyl"/>
      <lastmod>2026-11-02T02:40:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-transformations-polygon-rotation-and-dilation/sssssjyl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-polygon-rotation-and-dilation/sssssjyl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-polygon-rotation-and-dilation/sssssjyl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-polygon-rotation-and-dilation/sssssjyl"/>
      <lastmod>2026-11-02T02:40:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-approximation-to-binomial-distribution/sssssjyy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-approximation-to-binomial-distribution/sssssjyy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-approximation-to-binomial-distribution/sssssjyy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-approximation-to-binomial-distribution/sssssjyy"/>
      <lastmod>2026-11-01T19:20:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-approximation-to-binomial-distribution/sssssjyy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-approximation-to-binomial-distribution/sssssjyy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-approximation-to-binomial-distribution/sssssjyy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-approximation-to-binomial-distribution/sssssjyy"/>
      <lastmod>2026-11-01T19:20:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-multiplication/sssssjya</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-multiplication/sssssjya"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-multiplication/sssssjya"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-multiplication/sssssjya"/>
      <lastmod>2026-11-02T16:38:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-multiplication/sssssjya</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-multiplication/sssssjya"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-multiplication/sssssjya"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-multiplication/sssssjya"/>
      <lastmod>2026-11-02T16:38:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/examples-to-compare-properties-of-quadratic-functions/sssssjyc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/examples-to-compare-properties-of-quadratic-functions/sssssjyc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/examples-to-compare-properties-of-quadratic-functions/sssssjyc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/examples-to-compare-properties-of-quadratic-functions/sssssjyc"/>
      <lastmod>2026-11-02T18:48:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/examples-to-compare-properties-of-quadratic-functions/sssssjyc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/examples-to-compare-properties-of-quadratic-functions/sssssjyc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/examples-to-compare-properties-of-quadratic-functions/sssssjyc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/examples-to-compare-properties-of-quadratic-functions/sssssjyc"/>
      <lastmod>2026-11-02T18:48:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equation-of-a-line-through-midpoint/sssssjyr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equation-of-a-line-through-midpoint/sssssjyr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equation-of-a-line-through-midpoint/sssssjyr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equation-of-a-line-through-midpoint/sssssjyr"/>
      <lastmod>2026-11-02T02:25:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equation-of-a-line-through-midpoint/sssssjyr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equation-of-a-line-through-midpoint/sssssjyr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equation-of-a-line-through-midpoint/sssssjyr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equation-of-a-line-through-midpoint/sssssjyr"/>
      <lastmod>2026-11-02T02:25:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/radians-in-unit-circle-by-youlananhkai/sssssjyh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/radians-in-unit-circle-by-youlananhkai/sssssjyh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/radians-in-unit-circle-by-youlananhkai/sssssjyh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/radians-in-unit-circle-by-youlananhkai/sssssjyh"/>
      <lastmod>2026-11-01T21:16:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/radians-in-unit-circle-by-youlananhkai/sssssjyh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/radians-in-unit-circle-by-youlananhkai/sssssjyh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/radians-in-unit-circle-by-youlananhkai/sssssjyh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/radians-in-unit-circle-by-youlananhkai/sssssjyh"/>
      <lastmod>2026-11-01T21:16:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/random-points-on-a-circle/sssssjyt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-points-on-a-circle/sssssjyt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-points-on-a-circle/sssssjyt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-points-on-a-circle/sssssjyt"/>
      <lastmod>2026-11-01T19:33:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/random-points-on-a-circle/sssssjyt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-points-on-a-circle/sssssjyt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-points-on-a-circle/sssssjyt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-points-on-a-circle/sssssjyt"/>
      <lastmod>2026-11-01T19:33:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-functions-graph-equation-anatomy/sssssjyx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-functions-graph-equation-anatomy/sssssjyx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-functions-graph-equation-anatomy/sssssjyx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-functions-graph-equation-anatomy/sssssjyx"/>
      <lastmod>2026-11-02T17:11:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-functions-graph-equation-anatomy/sssssjyx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-functions-graph-equation-anatomy/sssssjyx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-functions-graph-equation-anatomy/sssssjyx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-functions-graph-equation-anatomy/sssssjyx"/>
      <lastmod>2026-11-02T17:11:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractional-representation-self-study-exercise-2/sssssjyi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractional-representation-self-study-exercise-2/sssssjyi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractional-representation-self-study-exercise-2/sssssjyi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractional-representation-self-study-exercise-2/sssssjyi"/>
      <lastmod>2026-11-02T16:32:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractional-representation-self-study-exercise-2/sssssjyi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractional-representation-self-study-exercise-2/sssssjyi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractional-representation-self-study-exercise-2/sssssjyi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractional-representation-self-study-exercise-2/sssssjyi"/>
      <lastmod>2026-11-02T16:32:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallel-lines-cut-by-a-transversal/sssssjyo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-lines-cut-by-a-transversal/sssssjyo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-lines-cut-by-a-transversal/sssssjyo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-lines-cut-by-a-transversal/sssssjyo"/>
      <lastmod>2026-11-02T17:51:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallel-lines-cut-by-a-transversal/sssssjyo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-lines-cut-by-a-transversal/sssssjyo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-lines-cut-by-a-transversal/sssssjyo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-lines-cut-by-a-transversal/sssssjyo"/>
      <lastmod>2026-11-02T17:51:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-s-orthocenter/sssssjas</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-s-orthocenter/sssssjas"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-s-orthocenter/sssssjas"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-s-orthocenter/sssssjas"/>
      <lastmod>2026-11-02T18:07:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-s-orthocenter/sssssjas</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-s-orthocenter/sssssjas"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-s-orthocenter/sssssjas"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-s-orthocenter/sssssjas"/>
      <lastmod>2026-11-02T18:07:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-of-triangle-abc-by-segment-ed/sssssja7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-of-triangle-abc-by-segment-ed/sssssja7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-of-triangle-abc-by-segment-ed/sssssja7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-of-triangle-abc-by-segment-ed/sssssja7"/>
      <lastmod>2026-11-02T17:04:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-of-triangle-abc-by-segment-ed/sssssja7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-of-triangle-abc-by-segment-ed/sssssja7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-of-triangle-abc-by-segment-ed/sssssja7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-of-triangle-abc-by-segment-ed/sssssja7"/>
      <lastmod>2026-11-02T17:04:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dgv3-formulas-using-function/sssssjan</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dgv3-formulas-using-function/sssssjan"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dgv3-formulas-using-function/sssssjan"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dgv3-formulas-using-function/sssssjan"/>
      <lastmod>2026-11-02T17:07:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dgv3-formulas-using-function/sssssjan</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dgv3-formulas-using-function/sssssjan"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dgv3-formulas-using-function/sssssjan"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dgv3-formulas-using-function/sssssjan"/>
      <lastmod>2026-11-02T17:07:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-construction-activity/sssssja2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-construction-activity/sssssja2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-construction-activity/sssssja2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-construction-activity/sssssja2"/>
      <lastmod>2026-11-01T21:53:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-construction-activity/sssssja2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-construction-activity/sssssja2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-construction-activity/sssssja2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-construction-activity/sssssja2"/>
      <lastmod>2026-11-01T21:53:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/draw-a-circle-by-david-wees/sssssjak</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-a-circle-by-david-wees/sssssjak"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-a-circle-by-david-wees/sssssjak"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-a-circle-by-david-wees/sssssjak"/>
      <lastmod>2026-11-01T23:54:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/draw-a-circle-by-david-wees/sssssjak</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-a-circle-by-david-wees/sssssjak"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-a-circle-by-david-wees/sssssjak"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-a-circle-by-david-wees/sssssjak"/>
      <lastmod>2026-11-01T23:54:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-area-and-perimeter-with-fixed-area-constraint/sssssjaz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-area-and-perimeter-with-fixed-area-constraint/sssssjaz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-area-and-perimeter-with-fixed-area-constraint/sssssjaz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-area-and-perimeter-with-fixed-area-constraint/sssssjaz"/>
      <lastmod>2026-11-02T18:41:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-area-and-perimeter-with-fixed-area-constraint/sssssjaz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-area-and-perimeter-with-fixed-area-constraint/sssssjaz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-area-and-perimeter-with-fixed-area-constraint/sssssjaz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-area-and-perimeter-with-fixed-area-constraint/sssssjaz"/>
      <lastmod>2026-11-02T18:41:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-distributions-geogebra-example/sssssja0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-distributions-geogebra-example/sssssja0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-distributions-geogebra-example/sssssja0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-distributions-geogebra-example/sssssja0"/>
      <lastmod>2026-11-02T18:11:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-distributions-geogebra-example/sssssja0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-distributions-geogebra-example/sssssja0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-distributions-geogebra-example/sssssja0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-distributions-geogebra-example/sssssja0"/>
      <lastmod>2026-11-02T18:11:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/directional-derivative-demo-by-esteban-diaz-uta-2/sssssjad</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directional-derivative-demo-by-esteban-diaz-uta-2/sssssjad"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directional-derivative-demo-by-esteban-diaz-uta-2/sssssjad"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directional-derivative-demo-by-esteban-diaz-uta-2/sssssjad"/>
      <lastmod>2026-11-02T18:35:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/directional-derivative-demo-by-esteban-diaz-uta-2/sssssjad</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directional-derivative-demo-by-esteban-diaz-uta-2/sssssjad"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directional-derivative-demo-by-esteban-diaz-uta-2/sssssjad"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directional-derivative-demo-by-esteban-diaz-uta-2/sssssjad"/>
      <lastmod>2026-11-02T18:35:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/focal-conics-and-dandelin-spheres/sssssjaf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/focal-conics-and-dandelin-spheres/sssssjaf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/focal-conics-and-dandelin-spheres/sssssjaf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/focal-conics-and-dandelin-spheres/sssssjaf"/>
      <lastmod>2026-11-02T16:31:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/focal-conics-and-dandelin-spheres/sssssjaf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/focal-conics-and-dandelin-spheres/sssssjaf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/focal-conics-and-dandelin-spheres/sssssjaf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/focal-conics-and-dandelin-spheres/sssssjaf"/>
      <lastmod>2026-11-02T16:31:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animation-demonstrating-congruent-triangles-and-rotation/sssssja8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-demonstrating-congruent-triangles-and-rotation/sssssja8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-demonstrating-congruent-triangles-and-rotation/sssssja8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-demonstrating-congruent-triangles-and-rotation/sssssja8"/>
      <lastmod>2026-11-02T18:06:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animation-demonstrating-congruent-triangles-and-rotation/sssssja8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-demonstrating-congruent-triangles-and-rotation/sssssja8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-demonstrating-congruent-triangles-and-rotation/sssssja8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-demonstrating-congruent-triangles-and-rotation/sssssja8"/>
      <lastmod>2026-11-02T18:06:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-sandbox-visualizing-fractions-with-geometric-construction/sssssjau</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-sandbox-visualizing-fractions-with-geometric-construction/sssssjau"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-sandbox-visualizing-fractions-with-geometric-construction/sssssjau"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-sandbox-visualizing-fractions-with-geometric-construction/sssssjau"/>
      <lastmod>2026-11-01T21:32:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-sandbox-visualizing-fractions-with-geometric-construction/sssssjau</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-sandbox-visualizing-fractions-with-geometric-construction/sssssjau"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-sandbox-visualizing-fractions-with-geometric-construction/sssssjau"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-sandbox-visualizing-fractions-with-geometric-construction/sssssjau"/>
      <lastmod>2026-11-01T21:32:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/z-scores-interactive-demonstration/sssssja5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/z-scores-interactive-demonstration/sssssja5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/z-scores-interactive-demonstration/sssssja5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/z-scores-interactive-demonstration/sssssja5"/>
      <lastmod>2026-11-02T07:24:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/z-scores-interactive-demonstration/sssssja5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/z-scores-interactive-demonstration/sssssja5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/z-scores-interactive-demonstration/sssssja5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/z-scores-interactive-demonstration/sssssja5"/>
      <lastmod>2026-11-02T07:24:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spiral-construction-demonstration/sssssjab</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-construction-demonstration/sssssjab"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-construction-demonstration/sssssjab"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-construction-demonstration/sssssjab"/>
      <lastmod>2026-11-01T21:48:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spiral-construction-demonstration/sssssjab</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-construction-demonstration/sssssjab"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-construction-demonstration/sssssjab"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-construction-demonstration/sssssjab"/>
      <lastmod>2026-11-01T21:48:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/t-distribution-vs-normal-distribution-demo/sssssja3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/t-distribution-vs-normal-distribution-demo/sssssja3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/t-distribution-vs-normal-distribution-demo/sssssja3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/t-distribution-vs-normal-distribution-demo/sssssja3"/>
      <lastmod>2026-11-02T17:15:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/t-distribution-vs-normal-distribution-demo/sssssja3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/t-distribution-vs-normal-distribution-demo/sssssja3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/t-distribution-vs-normal-distribution-demo/sssssja3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/t-distribution-vs-normal-distribution-demo/sssssja3"/>
      <lastmod>2026-11-02T17:15:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbolic-cylinder-views/sssssjaq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbolic-cylinder-views/sssssjaq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbolic-cylinder-views/sssssjaq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbolic-cylinder-views/sssssjaq"/>
      <lastmod>2026-11-01T19:22:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbolic-cylinder-views/sssssjaq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbolic-cylinder-views/sssssjaq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbolic-cylinder-views/sssssjaq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbolic-cylinder-views/sssssjaq"/>
      <lastmod>2026-11-01T19:22:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangular-prism-structure-exploration/sssssja1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-prism-structure-exploration/sssssja1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-prism-structure-exploration/sssssja1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-prism-structure-exploration/sssssja1"/>
      <lastmod>2026-11-02T13:14:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangular-prism-structure-exploration/sssssja1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-prism-structure-exploration/sssssja1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-prism-structure-exploration/sssssja1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-prism-structure-exploration/sssssja1"/>
      <lastmod>2026-11-02T13:14:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/octahedron-construction-and-net/sssssjam</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/octahedron-construction-and-net/sssssjam"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/octahedron-construction-and-net/sssssjam"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/octahedron-construction-and-net/sssssjam"/>
      <lastmod>2026-11-01T21:10:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/octahedron-construction-and-net/sssssjam</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/octahedron-construction-and-net/sssssjam"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/octahedron-construction-and-net/sssssjam"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/octahedron-construction-and-net/sssssjam"/>
      <lastmod>2026-11-01T21:10:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-density-function/sssssjaj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-density-function/sssssjaj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-density-function/sssssjaj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-density-function/sssssjaj"/>
      <lastmod>2026-11-02T17:02:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-density-function/sssssjaj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-density-function/sssssjaj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-density-function/sssssjaj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-density-function/sssssjaj"/>
      <lastmod>2026-11-02T17:02:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-numbers-mod-and-equilateral-triangle-dynamic-construction/sssssjap</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-numbers-mod-and-equilateral-triangle-dynamic-construction/sssssjap"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-numbers-mod-and-equilateral-triangle-dynamic-construction/sssssjap"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-numbers-mod-and-equilateral-triangle-dynamic-construction/sssssjap"/>
      <lastmod>2026-11-01T19:11:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-numbers-mod-and-equilateral-triangle-dynamic-construction/sssssjap</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-numbers-mod-and-equilateral-triangle-dynamic-construction/sssssjap"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-numbers-mod-and-equilateral-triangle-dynamic-construction/sssssjap"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-numbers-mod-and-equilateral-triangle-dynamic-construction/sssssjap"/>
      <lastmod>2026-11-01T19:11:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotational-sculpture/sssssjaw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-sculpture/sssssjaw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-sculpture/sssssjaw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-sculpture/sssssjaw"/>
      <lastmod>2026-11-01T21:57:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotational-sculpture/sssssjaw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-sculpture/sssssjaw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-sculpture/sssssjaw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-sculpture/sssssjaw"/>
      <lastmod>2026-11-01T21:57:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/london-eye-height-demo/sssssja6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/london-eye-height-demo/sssssja6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/london-eye-height-demo/sssssja6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/london-eye-height-demo/sssssja6"/>
      <lastmod>2026-11-01T21:07:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/london-eye-height-demo/sssssja6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/london-eye-height-demo/sssssja6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/london-eye-height-demo/sssssja6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/london-eye-height-demo/sssssja6"/>
      <lastmod>2026-11-01T21:07:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/random-term-of-arithmetic-sequence/sssssjag</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-term-of-arithmetic-sequence/sssssjag"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-term-of-arithmetic-sequence/sssssjag"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-term-of-arithmetic-sequence/sssssjag"/>
      <lastmod>2026-11-02T03:15:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/random-term-of-arithmetic-sequence/sssssjag</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-term-of-arithmetic-sequence/sssssjag"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-term-of-arithmetic-sequence/sssssjag"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-term-of-arithmetic-sequence/sssssjag"/>
      <lastmod>2026-11-02T03:15:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-by-famirchi00/sssssja9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-by-famirchi00/sssssja9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-by-famirchi00/sssssja9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-by-famirchi00/sssssja9"/>
      <lastmod>2026-11-02T09:54:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-by-famirchi00/sssssja9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-by-famirchi00/sssssja9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-by-famirchi00/sssssja9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-by-famirchi00/sssssja9"/>
      <lastmod>2026-11-02T09:54:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/red-and-blue-polygons-perimeters/sssssjae</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/red-and-blue-polygons-perimeters/sssssjae"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/red-and-blue-polygons-perimeters/sssssjae"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/red-and-blue-polygons-perimeters/sssssjae"/>
      <lastmod>2026-11-01T23:59:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/red-and-blue-polygons-perimeters/sssssjae</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/red-and-blue-polygons-perimeters/sssssjae"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/red-and-blue-polygons-perimeters/sssssjae"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/red-and-blue-polygons-perimeters/sssssjae"/>
      <lastmod>2026-11-01T23:59:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-transformations-y-stretch/sssssjav</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-transformations-y-stretch/sssssjav"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-transformations-y-stretch/sssssjav"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-transformations-y-stretch/sssssjav"/>
      <lastmod>2026-11-01T21:27:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-transformations-y-stretch/sssssjav</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-transformations-y-stretch/sssssjav"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-transformations-y-stretch/sssssjav"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-transformations-y-stretch/sssssjav"/>
      <lastmod>2026-11-01T21:27:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/swallowtail-catastrophe-curves/sssssja4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/swallowtail-catastrophe-curves/sssssja4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/swallowtail-catastrophe-curves/sssssja4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/swallowtail-catastrophe-curves/sssssja4"/>
      <lastmod>2026-11-01T21:37:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/swallowtail-catastrophe-curves/sssssja4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/swallowtail-catastrophe-curves/sssssja4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/swallowtail-catastrophe-curves/sssssja4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/swallowtail-catastrophe-curves/sssssja4"/>
      <lastmod>2026-11-01T21:37:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/approximating-square-roots/sssssjal</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/approximating-square-roots/sssssjal"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/approximating-square-roots/sssssjal"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/approximating-square-roots/sssssjal"/>
      <lastmod>2026-11-02T10:58:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/approximating-square-roots/sssssjal</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/approximating-square-roots/sssssjal"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/approximating-square-roots/sssssjal"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/approximating-square-roots/sssssjal"/>
      <lastmod>2026-11-02T10:58:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ovidiu-spiral/sssssjay</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ovidiu-spiral/sssssjay"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ovidiu-spiral/sssssjay"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ovidiu-spiral/sssssjay"/>
      <lastmod>2026-11-01T22:06:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ovidiu-spiral/sssssjay</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ovidiu-spiral/sssssjay"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ovidiu-spiral/sssssjay"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ovidiu-spiral/sssssjay"/>
      <lastmod>2026-11-01T22:06:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-geometric-illustrator-of-a-function-s-derivative-at-a-point/sssssjaa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometric-illustrator-of-a-function-s-derivative-at-a-point/sssssjaa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometric-illustrator-of-a-function-s-derivative-at-a-point/sssssjaa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometric-illustrator-of-a-function-s-derivative-at-a-point/sssssjaa"/>
      <lastmod>2026-11-02T11:53:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-geometric-illustrator-of-a-function-s-derivative-at-a-point/sssssjaa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometric-illustrator-of-a-function-s-derivative-at-a-point/sssssjaa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometric-illustrator-of-a-function-s-derivative-at-a-point/sssssjaa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometric-illustrator-of-a-function-s-derivative-at-a-point/sssssjaa"/>
      <lastmod>2026-11-02T11:53:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-geometry-phenomenon-with-equilateral-triangles-on-a-parallelogram-gogeo/sssssjac</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-phenomenon-with-equilateral-triangles-on-a-parallelogram-gogeo/sssssjac"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-phenomenon-with-equilateral-triangles-on-a-parallelogram-gogeo/sssssjac"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-phenomenon-with-equilateral-triangles-on-a-parallelogram-gogeo/sssssjac"/>
      <lastmod>2026-11-02T18:55:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-geometry-phenomenon-with-equilateral-triangles-on-a-parallelogram-gogeo/sssssjac</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-phenomenon-with-equilateral-triangles-on-a-parallelogram-gogeo/sssssjac"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-phenomenon-with-equilateral-triangles-on-a-parallelogram-gogeo/sssssjac"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-phenomenon-with-equilateral-triangles-on-a-parallelogram-gogeo/sssssjac"/>
      <lastmod>2026-11-02T18:55:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exterior-angles-of-polygons-by-heather-pierce/sssssjar</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angles-of-polygons-by-heather-pierce/sssssjar"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angles-of-polygons-by-heather-pierce/sssssjar"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angles-of-polygons-by-heather-pierce/sssssjar"/>
      <lastmod>2026-11-02T03:00:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exterior-angles-of-polygons-by-heather-pierce/sssssjar</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angles-of-polygons-by-heather-pierce/sssssjar"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angles-of-polygons-by-heather-pierce/sssssjar"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angles-of-polygons-by-heather-pierce/sssssjar"/>
      <lastmod>2026-11-02T03:00:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/making-the-moves-symmetry-and-linear-functions/sssssjah</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-the-moves-symmetry-and-linear-functions/sssssjah"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-the-moves-symmetry-and-linear-functions/sssssjah"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-the-moves-symmetry-and-linear-functions/sssssjah"/>
      <lastmod>2026-11-01T20:32:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/making-the-moves-symmetry-and-linear-functions/sssssjah</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-the-moves-symmetry-and-linear-functions/sssssjah"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-the-moves-symmetry-and-linear-functions/sssssjah"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-the-moves-symmetry-and-linear-functions/sssssjah"/>
      <lastmod>2026-11-01T20:32:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/alternate-exterior-angles-of-parallel-lines-dynamic-geogebra-demo/sssssjat</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-exterior-angles-of-parallel-lines-dynamic-geogebra-demo/sssssjat"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-exterior-angles-of-parallel-lines-dynamic-geogebra-demo/sssssjat"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-exterior-angles-of-parallel-lines-dynamic-geogebra-demo/sssssjat"/>
      <lastmod>2026-11-02T00:44:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/alternate-exterior-angles-of-parallel-lines-dynamic-geogebra-demo/sssssjat</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-exterior-angles-of-parallel-lines-dynamic-geogebra-demo/sssssjat"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-exterior-angles-of-parallel-lines-dynamic-geogebra-demo/sssssjat"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-exterior-angles-of-parallel-lines-dynamic-geogebra-demo/sssssjat"/>
      <lastmod>2026-11-02T00:44:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-karen-campe/sssssjax</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-karen-campe/sssssjax"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-karen-campe/sssssjax"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-karen-campe/sssssjax"/>
      <lastmod>2026-11-02T17:49:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-karen-campe/sssssjax</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-karen-campe/sssssjax"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-karen-campe/sssssjax"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-karen-campe/sssssjax"/>
      <lastmod>2026-11-02T17:49:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-rotation-and-reflection-matrices/sssssjai</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-rotation-and-reflection-matrices/sssssjai"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-rotation-and-reflection-matrices/sssssjai"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-rotation-and-reflection-matrices/sssssjai"/>
      <lastmod>2026-11-01T19:25:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-rotation-and-reflection-matrices/sssssjai</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-rotation-and-reflection-matrices/sssssjai"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-rotation-and-reflection-matrices/sssssjai"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-rotation-and-reflection-matrices/sssssjai"/>
      <lastmod>2026-11-01T19:25:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inscribed-angle-theorem-proof-exercise-case-3-center-outside-inscribed-angle/sssssjao</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inscribed-angle-theorem-proof-exercise-case-3-center-outside-inscribed-angle/sssssjao"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inscribed-angle-theorem-proof-exercise-case-3-center-outside-inscribed-angle/sssssjao"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inscribed-angle-theorem-proof-exercise-case-3-center-outside-inscribed-angle/sssssjao"/>
      <lastmod>2026-11-02T18:48:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inscribed-angle-theorem-proof-exercise-case-3-center-outside-inscribed-angle/sssssjao</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inscribed-angle-theorem-proof-exercise-case-3-center-outside-inscribed-angle/sssssjao"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inscribed-angle-theorem-proof-exercise-case-3-center-outside-inscribed-angle/sssssjao"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inscribed-angle-theorem-proof-exercise-case-3-center-outside-inscribed-angle/sssssjao"/>
      <lastmod>2026-11-02T18:48:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/t-distribution-confidence-interval/sssssjcs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/t-distribution-confidence-interval/sssssjcs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/t-distribution-confidence-interval/sssssjcs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/t-distribution-confidence-interval/sssssjcs"/>
      <lastmod>2026-11-01T21:20:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/t-distribution-confidence-interval/sssssjcs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/t-distribution-confidence-interval/sssssjcs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/t-distribution-confidence-interval/sssssjcs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/t-distribution-confidence-interval/sssssjcs"/>
      <lastmod>2026-11-01T21:20:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-the-right-way-polygon-mirror-construction/sssssjc7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-the-right-way-polygon-mirror-construction/sssssjc7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-the-right-way-polygon-mirror-construction/sssssjc7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-the-right-way-polygon-mirror-construction/sssssjc7"/>
      <lastmod>2026-11-02T03:12:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-the-right-way-polygon-mirror-construction/sssssjc7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-the-right-way-polygon-mirror-construction/sssssjc7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-the-right-way-polygon-mirror-construction/sssssjc7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-the-right-way-polygon-mirror-construction/sssssjc7"/>
      <lastmod>2026-11-02T03:12:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-by-mark-willis/sssssjcn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-by-mark-willis/sssssjcn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-by-mark-willis/sssssjcn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-by-mark-willis/sssssjcn"/>
      <lastmod>2026-11-02T00:00:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-by-mark-willis/sssssjcn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-by-mark-willis/sssssjcn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-by-mark-willis/sssssjcn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-by-mark-willis/sssssjcn"/>
      <lastmod>2026-11-02T00:00:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mean-value-theorem-geogebra-demo/sssssjc2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mean-value-theorem-geogebra-demo/sssssjc2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mean-value-theorem-geogebra-demo/sssssjc2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mean-value-theorem-geogebra-demo/sssssjc2"/>
      <lastmod>2026-11-02T17:43:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mean-value-theorem-geogebra-demo/sssssjc2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mean-value-theorem-geogebra-demo/sssssjc2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mean-value-theorem-geogebra-demo/sssssjc2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mean-value-theorem-geogebra-demo/sssssjc2"/>
      <lastmod>2026-11-02T17:43:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parametric-equations-of-the-plane/sssssjck</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-equations-of-the-plane/sssssjck"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-equations-of-the-plane/sssssjck"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-equations-of-the-plane/sssssjck"/>
      <lastmod>2026-11-02T18:57:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parametric-equations-of-the-plane/sssssjck</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-equations-of-the-plane/sssssjck"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-equations-of-the-plane/sssssjck"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-equations-of-the-plane/sssssjck"/>
      <lastmod>2026-11-02T18:57:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-by-d-jayaseelan-4/sssssjcz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-by-d-jayaseelan-4/sssssjcz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-by-d-jayaseelan-4/sssssjcz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-by-d-jayaseelan-4/sssssjcz"/>
      <lastmod>2026-11-02T17:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-by-d-jayaseelan-4/sssssjcz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-by-d-jayaseelan-4/sssssjcz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-by-d-jayaseelan-4/sssssjcz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-by-d-jayaseelan-4/sssssjcz"/>
      <lastmod>2026-11-02T17:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tessellation-of-a-general-quadrilateral/sssssjc0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tessellation-of-a-general-quadrilateral/sssssjc0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tessellation-of-a-general-quadrilateral/sssssjc0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tessellation-of-a-general-quadrilateral/sssssjc0"/>
      <lastmod>2026-11-02T00:30:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tessellation-of-a-general-quadrilateral/sssssjc0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tessellation-of-a-general-quadrilateral/sssssjc0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tessellation-of-a-general-quadrilateral/sssssjc0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tessellation-of-a-general-quadrilateral/sssssjc0"/>
      <lastmod>2026-11-02T00:30:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-systems-of-equations-by-substitution-dynamic-intersection-demo/sssssjcd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-systems-of-equations-by-substitution-dynamic-intersection-demo/sssssjcd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-systems-of-equations-by-substitution-dynamic-intersection-demo/sssssjcd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-systems-of-equations-by-substitution-dynamic-intersection-demo/sssssjcd"/>
      <lastmod>2026-11-01T20:53:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-systems-of-equations-by-substitution-dynamic-intersection-demo/sssssjcd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-systems-of-equations-by-substitution-dynamic-intersection-demo/sssssjcd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-systems-of-equations-by-substitution-dynamic-intersection-demo/sssssjcd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-systems-of-equations-by-substitution-dynamic-intersection-demo/sssssjcd"/>
      <lastmod>2026-11-01T20:53:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/calculate-winning-probability/sssssjcf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculate-winning-probability/sssssjcf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculate-winning-probability/sssssjcf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculate-winning-probability/sssssjcf"/>
      <lastmod>2026-11-02T18:39:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/calculate-winning-probability/sssssjcf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculate-winning-probability/sssssjcf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculate-winning-probability/sssssjcf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculate-winning-probability/sssssjcf"/>
      <lastmod>2026-11-02T18:39:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-d-jayaseelan-6/sssssjc8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-d-jayaseelan-6/sssssjc8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-demonstration-by-d-jayaseelan-6/sssssjc8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-d-jayaseelan-6/sssssjc8"/>
      <lastmod>2026-11-02T18:41:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-demonstration-by-d-jayaseelan-6/sssssjc8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-d-jayaseelan-6/sssssjc8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-demonstration-by-d-jayaseelan-6/sssssjc8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-demonstration-by-d-jayaseelan-6/sssssjc8"/>
      <lastmod>2026-11-02T18:41:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/activity-d-medians/sssssjcu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/activity-d-medians/sssssjcu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/activity-d-medians/sssssjcu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/activity-d-medians/sssssjcu"/>
      <lastmod>2026-11-02T08:35:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/activity-d-medians/sssssjcu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/activity-d-medians/sssssjcu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/activity-d-medians/sssssjcu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/activity-d-medians/sssssjcu"/>
      <lastmod>2026-11-02T08:35:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/infinite-numbers-and-parametric-curves/sssssjc5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/infinite-numbers-and-parametric-curves/sssssjc5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/infinite-numbers-and-parametric-curves/sssssjc5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/infinite-numbers-and-parametric-curves/sssssjc5"/>
      <lastmod>2026-11-01T23:36:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/infinite-numbers-and-parametric-curves/sssssjc5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/infinite-numbers-and-parametric-curves/sssssjc5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/infinite-numbers-and-parametric-curves/sssssjc5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/infinite-numbers-and-parametric-curves/sssssjc5"/>
      <lastmod>2026-11-01T23:36:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interpreting-rates-practice/sssssjcb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interpreting-rates-practice/sssssjcb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interpreting-rates-practice/sssssjcb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interpreting-rates-practice/sssssjcb"/>
      <lastmod>2026-11-02T10:37:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interpreting-rates-practice/sssssjcb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interpreting-rates-practice/sssssjcb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interpreting-rates-practice/sssssjcb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interpreting-rates-practice/sssssjcb"/>
      <lastmod>2026-11-02T10:37:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/horizontal-rectangles-rotated-about-the-y-axis/sssssjc3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-rectangles-rotated-about-the-y-axis/sssssjc3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-rectangles-rotated-about-the-y-axis/sssssjc3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-rectangles-rotated-about-the-y-axis/sssssjc3"/>
      <lastmod>2026-11-02T16:59:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/horizontal-rectangles-rotated-about-the-y-axis/sssssjc3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-rectangles-rotated-about-the-y-axis/sssssjc3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-rectangles-rotated-about-the-y-axis/sssssjc3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-rectangles-rotated-about-the-y-axis/sssssjc3"/>
      <lastmod>2026-11-02T16:59:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/custom-tool-exercise-3/sssssjcq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/custom-tool-exercise-3/sssssjcq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/custom-tool-exercise-3/sssssjcq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/custom-tool-exercise-3/sssssjcq"/>
      <lastmod>2026-11-02T12:42:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/custom-tool-exercise-3/sssssjcq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/custom-tool-exercise-3/sssssjcq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/custom-tool-exercise-3/sssssjcq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/custom-tool-exercise-3/sssssjcq"/>
      <lastmod>2026-11-02T12:42:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-volume-calculation-by-ahmed-rashad/sssssjc1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-by-ahmed-rashad/sssssjc1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-volume-calculation-by-ahmed-rashad/sssssjc1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-by-ahmed-rashad/sssssjc1"/>
      <lastmod>2026-11-01T21:14:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-volume-calculation-by-ahmed-rashad/sssssjc1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-by-ahmed-rashad/sssssjc1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-volume-calculation-by-ahmed-rashad/sssssjc1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-by-ahmed-rashad/sssssjc1"/>
      <lastmod>2026-11-01T21:14:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dartboard-random-point-generator/sssssjcm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dartboard-random-point-generator/sssssjcm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dartboard-random-point-generator/sssssjcm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dartboard-random-point-generator/sssssjcm"/>
      <lastmod>2026-11-01T23:23:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dartboard-random-point-generator/sssssjcm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dartboard-random-point-generator/sssssjcm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dartboard-random-point-generator/sssssjcm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dartboard-random-point-generator/sssssjcm"/>
      <lastmod>2026-11-01T23:23:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/create-kite-rhombus-trapezoid-etc/sssssjcj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-kite-rhombus-trapezoid-etc/sssssjcj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-kite-rhombus-trapezoid-etc/sssssjcj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-kite-rhombus-trapezoid-etc/sssssjcj"/>
      <lastmod>2026-11-02T16:55:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/create-kite-rhombus-trapezoid-etc/sssssjcj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-kite-rhombus-trapezoid-etc/sssssjcj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-kite-rhombus-trapezoid-etc/sssssjcj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-kite-rhombus-trapezoid-etc/sssssjcj"/>
      <lastmod>2026-11-02T16:55:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/asa-and-aas-triangle-congruence/sssssjcp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/asa-and-aas-triangle-congruence/sssssjcp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/asa-and-aas-triangle-congruence/sssssjcp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/asa-and-aas-triangle-congruence/sssssjcp"/>
      <lastmod>2026-11-01T23:48:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/asa-and-aas-triangle-congruence/sssssjcp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/asa-and-aas-triangle-congruence/sssssjcp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/asa-and-aas-triangle-congruence/sssssjcp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/asa-and-aas-triangle-congruence/sssssjcp"/>
      <lastmod>2026-11-01T23:48:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rational-exponents/sssssjcw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rational-exponents/sssssjcw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rational-exponents/sssssjcw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rational-exponents/sssssjcw"/>
      <lastmod>2026-11-02T17:58:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rational-exponents/sssssjcw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rational-exponents/sssssjcw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rational-exponents/sssssjcw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rational-exponents/sssssjcw"/>
      <lastmod>2026-11-02T17:58:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-board-quartiles/sssssjc6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-board-quartiles/sssssjc6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-board-quartiles/sssssjc6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-board-quartiles/sssssjc6"/>
      <lastmod>2026-11-01T21:09:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-board-quartiles/sssssjc6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-board-quartiles/sssssjc6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-board-quartiles/sssssjc6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-board-quartiles/sssssjc6"/>
      <lastmod>2026-11-01T21:09:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sequence-plotter-with-partial-sums/sssssjcg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sequence-plotter-with-partial-sums/sssssjcg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sequence-plotter-with-partial-sums/sssssjcg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sequence-plotter-with-partial-sums/sssssjcg"/>
      <lastmod>2026-11-02T02:30:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sequence-plotter-with-partial-sums/sssssjcg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sequence-plotter-with-partial-sums/sssssjcg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sequence-plotter-with-partial-sums/sssssjcg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sequence-plotter-with-partial-sums/sssssjcg"/>
      <lastmod>2026-11-02T02:30:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-a-line-and-parabola/sssssjc9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-a-line-and-parabola/sssssjc9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-a-line-and-parabola/sssssjc9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-a-line-and-parabola/sssssjc9"/>
      <lastmod>2026-11-02T16:33:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-a-line-and-parabola/sssssjc9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-a-line-and-parabola/sssssjc9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-a-line-and-parabola/sssssjc9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-a-line-and-parabola/sssssjc9"/>
      <lastmod>2026-11-02T16:33:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sketching-and-interpreting-function-graphs-extrema-and-axial-symmetry/sssssjce</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sketching-and-interpreting-function-graphs-extrema-and-axial-symmetry/sssssjce"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sketching-and-interpreting-function-graphs-extrema-and-axial-symmetry/sssssjce"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sketching-and-interpreting-function-graphs-extrema-and-axial-symmetry/sssssjce"/>
      <lastmod>2026-11-02T08:59:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sketching-and-interpreting-function-graphs-extrema-and-axial-symmetry/sssssjce</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sketching-and-interpreting-function-graphs-extrema-and-axial-symmetry/sssssjce"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sketching-and-interpreting-function-graphs-extrema-and-axial-symmetry/sssssjce"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sketching-and-interpreting-function-graphs-extrema-and-axial-symmetry/sssssjce"/>
      <lastmod>2026-11-02T08:59:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-of-function-graphs/sssssjcv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-of-function-graphs/sssssjcv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-of-function-graphs/sssssjcv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-of-function-graphs/sssssjcv"/>
      <lastmod>2026-11-02T18:13:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-of-function-graphs/sssssjcv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-of-function-graphs/sssssjcv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-of-function-graphs/sssssjcv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-of-function-graphs/sssssjcv"/>
      <lastmod>2026-11-02T18:13:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-bisector/sssssjc4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisector/sssssjc4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisector/sssssjc4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisector/sssssjc4"/>
      <lastmod>2026-11-02T16:51:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-bisector/sssssjc4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisector/sssssjc4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisector/sssssjc4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisector/sssssjc4"/>
      <lastmod>2026-11-02T16:51:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-1/sssssjcl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-1/sssssjcl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-1/sssssjcl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-1/sssssjcl"/>
      <lastmod>2026-11-02T18:12:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-1/sssssjcl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-1/sssssjcl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-1/sssssjcl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-1/sssssjcl"/>
      <lastmod>2026-11-02T18:12:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-volume-calculation-by-matthew-goehrig/sssssjcy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-volume-calculation-by-matthew-goehrig/sssssjcy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-volume-calculation-by-matthew-goehrig/sssssjcy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-volume-calculation-by-matthew-goehrig/sssssjcy"/>
      <lastmod>2026-11-01T23:37:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-volume-calculation-by-matthew-goehrig/sssssjcy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-volume-calculation-by-matthew-goehrig/sssssjcy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-volume-calculation-by-matthew-goehrig/sssssjcy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-volume-calculation-by-matthew-goehrig/sssssjcy"/>
      <lastmod>2026-11-01T23:37:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/existence-of-the-orthocenter-in-a-right-triangle/sssssjca</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/existence-of-the-orthocenter-in-a-right-triangle/sssssjca"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/existence-of-the-orthocenter-in-a-right-triangle/sssssjca"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/existence-of-the-orthocenter-in-a-right-triangle/sssssjca"/>
      <lastmod>2026-11-02T15:18:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/existence-of-the-orthocenter-in-a-right-triangle/sssssjca</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/existence-of-the-orthocenter-in-a-right-triangle/sssssjca"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/existence-of-the-orthocenter-in-a-right-triangle/sssssjca"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/existence-of-the-orthocenter-in-a-right-triangle/sssssjca"/>
      <lastmod>2026-11-02T15:18:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-test/sssssjcc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-test/sssssjcc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-test/sssssjcc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-test/sssssjcc"/>
      <lastmod>2026-11-02T13:16:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-test/sssssjcc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-test/sssssjcc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-test/sssssjcc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-test/sssssjcc"/>
      <lastmod>2026-11-02T13:16:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plane-equilateral-triangle-sphere/sssssjcr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plane-equilateral-triangle-sphere/sssssjcr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plane-equilateral-triangle-sphere/sssssjcr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plane-equilateral-triangle-sphere/sssssjcr"/>
      <lastmod>2026-11-01T21:53:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plane-equilateral-triangle-sphere/sssssjcr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plane-equilateral-triangle-sphere/sssssjcr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plane-equilateral-triangle-sphere/sssssjcr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plane-equilateral-triangle-sphere/sssssjcr"/>
      <lastmod>2026-11-01T21:53:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-construction-demo-by-elise/sssssjch</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-demo-by-elise/sssssjch"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-demo-by-elise/sssssjch"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-demo-by-elise/sssssjch"/>
      <lastmod>2026-11-02T18:39:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-construction-demo-by-elise/sssssjch</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-demo-by-elise/sssssjch"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-demo-by-elise/sssssjch"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-demo-by-elise/sssssjch"/>
      <lastmod>2026-11-02T18:39:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vertical-translations-of-quadratic-functions/sssssjct</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-translations-of-quadratic-functions/sssssjct"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-translations-of-quadratic-functions/sssssjct"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-translations-of-quadratic-functions/sssssjct"/>
      <lastmod>2026-11-01T23:57:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vertical-translations-of-quadratic-functions/sssssjct</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-translations-of-quadratic-functions/sssssjct"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-translations-of-quadratic-functions/sssssjct"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-translations-of-quadratic-functions/sssssjct"/>
      <lastmod>2026-11-01T23:57:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circumcenter-of-a-triangle-by-stephanie-harman-smith/sssssjcx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumcenter-of-a-triangle-by-stephanie-harman-smith/sssssjcx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumcenter-of-a-triangle-by-stephanie-harman-smith/sssssjcx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumcenter-of-a-triangle-by-stephanie-harman-smith/sssssjcx"/>
      <lastmod>2026-11-02T16:46:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circumcenter-of-a-triangle-by-stephanie-harman-smith/sssssjcx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumcenter-of-a-triangle-by-stephanie-harman-smith/sssssjcx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumcenter-of-a-triangle-by-stephanie-harman-smith/sssssjcx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumcenter-of-a-triangle-by-stephanie-harman-smith/sssssjcx"/>
      <lastmod>2026-11-02T16:46:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-daniel-mentrard/sssssjci</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-daniel-mentrard/sssssjci"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-demonstration-by-daniel-mentrard/sssssjci"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-daniel-mentrard/sssssjci"/>
      <lastmod>2026-11-01T19:14:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-addition-demonstration-by-daniel-mentrard/sssssjci</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-daniel-mentrard/sssssjci"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-demonstration-by-daniel-mentrard/sssssjci"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-daniel-mentrard/sssssjci"/>
      <lastmod>2026-11-01T19:14:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coordinate-geometry-lesson-example/sssssjco</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinate-geometry-lesson-example/sssssjco"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinate-geometry-lesson-example/sssssjco"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinate-geometry-lesson-example/sssssjco"/>
      <lastmod>2026-11-01T21:08:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coordinate-geometry-lesson-example/sssssjco</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinate-geometry-lesson-example/sssssjco"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinate-geometry-lesson-example/sssssjco"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinate-geometry-lesson-example/sssssjco"/>
      <lastmod>2026-11-01T21:08:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volumes-of-revolution-using-shells/sssssjrs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-of-revolution-using-shells/sssssjrs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-of-revolution-using-shells/sssssjrs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-of-revolution-using-shells/sssssjrs"/>
      <lastmod>2026-11-01T19:07:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volumes-of-revolution-using-shells/sssssjrs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-of-revolution-using-shells/sssssjrs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-of-revolution-using-shells/sssssjrs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-of-revolution-using-shells/sssssjrs"/>
      <lastmod>2026-11-01T19:07:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-transformations-demo/sssssjr7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-transformations-demo/sssssjr7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-transformations-demo/sssssjr7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-transformations-demo/sssssjr7"/>
      <lastmod>2026-11-02T17:18:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-transformations-demo/sssssjr7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-transformations-demo/sssssjr7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-transformations-demo/sssssjr7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-transformations-demo/sssssjr7"/>
      <lastmod>2026-11-02T17:18:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/soma-cube/sssssjrn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/soma-cube/sssssjrn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/soma-cube/sssssjrn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/soma-cube/sssssjrn"/>
      <lastmod>2026-11-01T23:50:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/soma-cube/sssssjrn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/soma-cube/sssssjrn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/soma-cube/sssssjrn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/soma-cube/sssssjrn"/>
      <lastmod>2026-11-01T23:50:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-over-a-graph/sssssjr2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-over-a-graph/sssssjr2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-over-a-graph/sssssjr2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-over-a-graph/sssssjr2"/>
      <lastmod>2026-11-01T21:48:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-over-a-graph/sssssjr2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-over-a-graph/sssssjr2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-over-a-graph/sssssjr2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-over-a-graph/sssssjr2"/>
      <lastmod>2026-11-01T21:48:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-demonstration-of-hypothesis-tests-for-population-proportion/sssssjrk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-hypothesis-tests-for-population-proportion/sssssjrk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demonstration-of-hypothesis-tests-for-population-proportion/sssssjrk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-hypothesis-tests-for-population-proportion/sssssjrk"/>
      <lastmod>2026-11-02T18:29:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-demonstration-of-hypothesis-tests-for-population-proportion/sssssjrk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-hypothesis-tests-for-population-proportion/sssssjrk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demonstration-of-hypothesis-tests-for-population-proportion/sssssjrk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-hypothesis-tests-for-population-proportion/sssssjrk"/>
      <lastmod>2026-11-02T18:29:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-and-angle-bisector-dynamic-geometry-demo/sssssjrz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-and-angle-bisector-dynamic-geometry-demo/sssssjrz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-and-angle-bisector-dynamic-geometry-demo/sssssjrz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-and-angle-bisector-dynamic-geometry-demo/sssssjrz"/>
      <lastmod>2026-11-02T18:52:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-and-angle-bisector-dynamic-geometry-demo/sssssjrz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-and-angle-bisector-dynamic-geometry-demo/sssssjrz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-and-angle-bisector-dynamic-geometry-demo/sssssjrz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-and-angle-bisector-dynamic-geometry-demo/sssssjrz"/>
      <lastmod>2026-11-02T18:52:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/longest-rod-in-a-rectangular-prism-geometry-construction/sssssjr0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/longest-rod-in-a-rectangular-prism-geometry-construction/sssssjr0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/longest-rod-in-a-rectangular-prism-geometry-construction/sssssjr0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/longest-rod-in-a-rectangular-prism-geometry-construction/sssssjr0"/>
      <lastmod>2026-11-02T18:51:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/longest-rod-in-a-rectangular-prism-geometry-construction/sssssjr0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/longest-rod-in-a-rectangular-prism-geometry-construction/sssssjr0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/longest-rod-in-a-rectangular-prism-geometry-construction/sssssjr0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/longest-rod-in-a-rectangular-prism-geometry-construction/sssssjr0"/>
      <lastmod>2026-11-02T18:51:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/line-transformation-demo/sssssjrd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-transformation-demo/sssssjrd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-transformation-demo/sssssjrd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-transformation-demo/sssssjrd"/>
      <lastmod>2026-11-02T18:43:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/line-transformation-demo/sssssjrd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-transformation-demo/sssssjrd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-transformation-demo/sssssjrd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-transformation-demo/sssssjrd"/>
      <lastmod>2026-11-02T18:43:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-congruence/sssssjrf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-congruence/sssssjrf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-congruence/sssssjrf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-congruence/sssssjrf"/>
      <lastmod>2026-11-02T13:44:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-congruence/sssssjrf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-congruence/sssssjrf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-congruence/sssssjrf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-congruence/sssssjrf"/>
      <lastmod>2026-11-02T13:44:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-area-calculation-by-steve-phelps/sssssjr8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-area-calculation-by-steve-phelps/sssssjr8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-area-calculation-by-steve-phelps/sssssjr8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-area-calculation-by-steve-phelps/sssssjr8"/>
      <lastmod>2026-11-01T21:34:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-area-calculation-by-steve-phelps/sssssjr8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-area-calculation-by-steve-phelps/sssssjr8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-area-calculation-by-steve-phelps/sssssjr8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-area-calculation-by-steve-phelps/sssssjr8"/>
      <lastmod>2026-11-01T21:34:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/directional-derivative-demo-by-dixiemath/sssssjru</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directional-derivative-demo-by-dixiemath/sssssjru"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directional-derivative-demo-by-dixiemath/sssssjru"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directional-derivative-demo-by-dixiemath/sssssjru"/>
      <lastmod>2026-11-02T02:54:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/directional-derivative-demo-by-dixiemath/sssssjru</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directional-derivative-demo-by-dixiemath/sssssjru"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directional-derivative-demo-by-dixiemath/sssssjru"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directional-derivative-demo-by-dixiemath/sssssjru"/>
      <lastmod>2026-11-02T02:54:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/puzzle-square-equilateral-triangle-geometric-dissection/sssssjr5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/puzzle-square-equilateral-triangle-geometric-dissection/sssssjr5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/puzzle-square-equilateral-triangle-geometric-dissection/sssssjr5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/puzzle-square-equilateral-triangle-geometric-dissection/sssssjr5"/>
      <lastmod>2026-11-02T10:38:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/puzzle-square-equilateral-triangle-geometric-dissection/sssssjr5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/puzzle-square-equilateral-triangle-geometric-dissection/sssssjr5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/puzzle-square-equilateral-triangle-geometric-dissection/sssssjr5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/puzzle-square-equilateral-triangle-geometric-dissection/sssssjr5"/>
      <lastmod>2026-11-02T10:38:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotational-symmetry-by-mr-gamil/sssssjrb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-mr-gamil/sssssjrb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-by-mr-gamil/sssssjrb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-mr-gamil/sssssjrb"/>
      <lastmod>2026-11-02T11:48:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotational-symmetry-by-mr-gamil/sssssjrb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-mr-gamil/sssssjrb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-by-mr-gamil/sssssjrb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-mr-gamil/sssssjrb"/>
      <lastmod>2026-11-02T11:48:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/disk-method-derivation/sssssjr3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/disk-method-derivation/sssssjr3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/disk-method-derivation/sssssjr3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/disk-method-derivation/sssssjr3"/>
      <lastmod>2026-11-01T23:36:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/disk-method-derivation/sssssjr3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/disk-method-derivation/sssssjr3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/disk-method-derivation/sssssjr3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/disk-method-derivation/sssssjr3"/>
      <lastmod>2026-11-01T23:36:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-and-cone-intersection-demo/sssssjrq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-and-cone-intersection-demo/sssssjrq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-and-cone-intersection-demo/sssssjrq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-and-cone-intersection-demo/sssssjrq"/>
      <lastmod>2026-11-02T03:18:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-and-cone-intersection-demo/sssssjrq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-and-cone-intersection-demo/sssssjrq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-and-cone-intersection-demo/sssssjrq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-and-cone-intersection-demo/sssssjrq"/>
      <lastmod>2026-11-02T03:18:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-cylinder-by-j-benjamin/sssssjr1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cylinder-by-j-benjamin/sssssjr1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cylinder-by-j-benjamin/sssssjr1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cylinder-by-j-benjamin/sssssjr1"/>
      <lastmod>2026-11-02T13:19:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-cylinder-by-j-benjamin/sssssjr1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cylinder-by-j-benjamin/sssssjr1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cylinder-by-j-benjamin/sssssjr1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cylinder-by-j-benjamin/sssssjr1"/>
      <lastmod>2026-11-02T13:19:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilation-of-a-triangle-along-a-line/sssssjrm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-of-a-triangle-along-a-line/sssssjrm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-of-a-triangle-along-a-line/sssssjrm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-of-a-triangle-along-a-line/sssssjrm"/>
      <lastmod>2026-11-01T21:30:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilation-of-a-triangle-along-a-line/sssssjrm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-of-a-triangle-along-a-line/sssssjrm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-of-a-triangle-along-a-line/sssssjrm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-of-a-triangle-along-a-line/sssssjrm"/>
      <lastmod>2026-11-01T21:30:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/standard-deviation-and-mean-a-3d-vector-and-matrix-rotation-visualization/sssssjrj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-deviation-and-mean-a-3d-vector-and-matrix-rotation-visualization/sssssjrj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-deviation-and-mean-a-3d-vector-and-matrix-rotation-visualization/sssssjrj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-deviation-and-mean-a-3d-vector-and-matrix-rotation-visualization/sssssjrj"/>
      <lastmod>2026-11-02T18:11:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/standard-deviation-and-mean-a-3d-vector-and-matrix-rotation-visualization/sssssjrj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-deviation-and-mean-a-3d-vector-and-matrix-rotation-visualization/sssssjrj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-deviation-and-mean-a-3d-vector-and-matrix-rotation-visualization/sssssjrj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-deviation-and-mean-a-3d-vector-and-matrix-rotation-visualization/sssssjrj"/>
      <lastmod>2026-11-02T18:11:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/flower-surface-dynamic-optimization-with-triangles-and-medians/sssssjrp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/flower-surface-dynamic-optimization-with-triangles-and-medians/sssssjrp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/flower-surface-dynamic-optimization-with-triangles-and-medians/sssssjrp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/flower-surface-dynamic-optimization-with-triangles-and-medians/sssssjrp"/>
      <lastmod>2026-11-01T19:08:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/flower-surface-dynamic-optimization-with-triangles-and-medians/sssssjrp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/flower-surface-dynamic-optimization-with-triangles-and-medians/sssssjrp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/flower-surface-dynamic-optimization-with-triangles-and-medians/sssssjrp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/flower-surface-dynamic-optimization-with-triangles-and-medians/sssssjrp"/>
      <lastmod>2026-11-01T19:08:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/splitting-ratios-with-random-ratios/sssssjrw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/splitting-ratios-with-random-ratios/sssssjrw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/splitting-ratios-with-random-ratios/sssssjrw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/splitting-ratios-with-random-ratios/sssssjrw"/>
      <lastmod>2026-11-02T16:39:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/splitting-ratios-with-random-ratios/sssssjrw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/splitting-ratios-with-random-ratios/sssssjrw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/splitting-ratios-with-random-ratios/sssssjrw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/splitting-ratios-with-random-ratios/sssssjrw"/>
      <lastmod>2026-11-02T16:39:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drawing-vectors-in-3d/sssssjr6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-vectors-in-3d/sssssjr6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-vectors-in-3d/sssssjr6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-vectors-in-3d/sssssjr6"/>
      <lastmod>2026-11-02T00:38:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drawing-vectors-in-3d/sssssjr6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-vectors-in-3d/sssssjr6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-vectors-in-3d/sssssjr6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-vectors-in-3d/sssssjr6"/>
      <lastmod>2026-11-02T00:38:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-angles/sssssjrg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-angles/sssssjrg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-angles/sssssjrg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-angles/sssssjrg"/>
      <lastmod>2026-11-02T17:16:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-angles/sssssjrg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-angles/sssssjrg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-angles/sssssjrg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-angles/sssssjrg"/>
      <lastmod>2026-11-02T17:16:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-and-foci-definition/sssssjr9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-and-foci-definition/sssssjr9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-and-foci-definition/sssssjr9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-and-foci-definition/sssssjr9"/>
      <lastmod>2026-11-02T18:59:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-and-foci-definition/sssssjr9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-and-foci-definition/sssssjr9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-and-foci-definition/sssssjr9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-and-foci-definition/sssssjr9"/>
      <lastmod>2026-11-02T18:59:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/islamic-kite-pattern/sssssjre</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-kite-pattern/sssssjre"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-kite-pattern/sssssjre"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-kite-pattern/sssssjre"/>
      <lastmod>2026-11-01T23:42:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/islamic-kite-pattern/sssssjre</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-kite-pattern/sssssjre"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-kite-pattern/sssssjre"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-kite-pattern/sssssjre"/>
      <lastmod>2026-11-01T23:42:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-subtraction-visualization/sssssjrv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-subtraction-visualization/sssssjrv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-subtraction-visualization/sssssjrv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-subtraction-visualization/sssssjrv"/>
      <lastmod>2026-11-02T03:07:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-subtraction-visualization/sssssjrv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-subtraction-visualization/sssssjrv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-subtraction-visualization/sssssjrv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-subtraction-visualization/sssssjrv"/>
      <lastmod>2026-11-02T03:07:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-addition-postulate-demonstration-by-dr-ervin-howard/sssssjr4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-addition-postulate-demonstration-by-dr-ervin-howard/sssssjr4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-addition-postulate-demonstration-by-dr-ervin-howard/sssssjr4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-addition-postulate-demonstration-by-dr-ervin-howard/sssssjr4"/>
      <lastmod>2026-11-01T23:46:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-addition-postulate-demonstration-by-dr-ervin-howard/sssssjr4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-addition-postulate-demonstration-by-dr-ervin-howard/sssssjr4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-addition-postulate-demonstration-by-dr-ervin-howard/sssssjr4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-addition-postulate-demonstration-by-dr-ervin-howard/sssssjr4"/>
      <lastmod>2026-11-01T23:46:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/box-and-whisker-diagram-histogram/sssssjrl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/box-and-whisker-diagram-histogram/sssssjrl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/box-and-whisker-diagram-histogram/sssssjrl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/box-and-whisker-diagram-histogram/sssssjrl"/>
      <lastmod>2026-11-02T00:40:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/box-and-whisker-diagram-histogram/sssssjrl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/box-and-whisker-diagram-histogram/sssssjrl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/box-and-whisker-diagram-histogram/sssssjrl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/box-and-whisker-diagram-histogram/sssssjrl"/>
      <lastmod>2026-11-02T00:40:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cardiod-epicycloid-hypocycloid-via-rolling-coin/sssssjry</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cardiod-epicycloid-hypocycloid-via-rolling-coin/sssssjry"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cardiod-epicycloid-hypocycloid-via-rolling-coin/sssssjry"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cardiod-epicycloid-hypocycloid-via-rolling-coin/sssssjry"/>
      <lastmod>2026-11-01T21:31:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cardiod-epicycloid-hypocycloid-via-rolling-coin/sssssjry</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cardiod-epicycloid-hypocycloid-via-rolling-coin/sssssjry"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cardiod-epicycloid-hypocycloid-via-rolling-coin/sssssjry"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cardiod-epicycloid-hypocycloid-via-rolling-coin/sssssjry"/>
      <lastmod>2026-11-01T21:31:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/horizontal-shift-of-a-function-graph/sssssjra</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-shift-of-a-function-graph/sssssjra"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-shift-of-a-function-graph/sssssjra"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-shift-of-a-function-graph/sssssjra"/>
      <lastmod>2026-11-01T20:54:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/horizontal-shift-of-a-function-graph/sssssjra</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-shift-of-a-function-graph/sssssjra"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-shift-of-a-function-graph/sssssjra"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-shift-of-a-function-graph/sssssjra"/>
      <lastmod>2026-11-01T20:54:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/locus-of-a-circle-tangent-to-a-fixed-circle/sssssjrc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-of-a-circle-tangent-to-a-fixed-circle/sssssjrc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-of-a-circle-tangent-to-a-fixed-circle/sssssjrc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-of-a-circle-tangent-to-a-fixed-circle/sssssjrc"/>
      <lastmod>2026-11-02T18:03:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/locus-of-a-circle-tangent-to-a-fixed-circle/sssssjrc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-of-a-circle-tangent-to-a-fixed-circle/sssssjrc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-of-a-circle-tangent-to-a-fixed-circle/sssssjrc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-of-a-circle-tangent-to-a-fixed-circle/sssssjrc"/>
      <lastmod>2026-11-02T18:03:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-selecting-balls-by-virginia-keith/sssssjrr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-selecting-balls-by-virginia-keith/sssssjrr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-selecting-balls-by-virginia-keith/sssssjrr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-selecting-balls-by-virginia-keith/sssssjrr"/>
      <lastmod>2026-11-02T17:09:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-selecting-balls-by-virginia-keith/sssssjrr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-selecting-balls-by-virginia-keith/sssssjrr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-selecting-balls-by-virginia-keith/sssssjrr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-selecting-balls-by-virginia-keith/sssssjrr"/>
      <lastmod>2026-11-02T17:09:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-lines-y-intercept-practice/sssssjrh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-lines-y-intercept-practice/sssssjrh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-lines-y-intercept-practice/sssssjrh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-lines-y-intercept-practice/sssssjrh"/>
      <lastmod>2026-11-02T12:55:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-lines-y-intercept-practice/sssssjrh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-lines-y-intercept-practice/sssssjrh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-lines-y-intercept-practice/sssssjrh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-lines-y-intercept-practice/sssssjrh"/>
      <lastmod>2026-11-02T12:55:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/descriptive-geometry/sssssjrt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/descriptive-geometry/sssssjrt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/descriptive-geometry/sssssjrt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/descriptive-geometry/sssssjrt"/>
      <lastmod>2026-11-01T21:06:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/descriptive-geometry/sssssjrt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/descriptive-geometry/sssssjrt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/descriptive-geometry/sssssjrt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/descriptive-geometry/sssssjrt"/>
      <lastmod>2026-11-01T21:06:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-revolution-discussion/sssssjrx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-discussion/sssssjrx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-discussion/sssssjrx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-discussion/sssssjrx"/>
      <lastmod>2026-11-02T13:40:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-revolution-discussion/sssssjrx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-discussion/sssssjrx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-discussion/sssssjrx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-discussion/sssssjrx"/>
      <lastmod>2026-11-02T13:40:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-relations-of-squares-and-cones/sssssjri</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-relations-of-squares-and-cones/sssssjri"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-relations-of-squares-and-cones/sssssjri"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-relations-of-squares-and-cones/sssssjri"/>
      <lastmod>2026-11-02T18:31:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-relations-of-squares-and-cones/sssssjri</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-relations-of-squares-and-cones/sssssjri"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-relations-of-squares-and-cones/sssssjri"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-relations-of-squares-and-cones/sssssjri"/>
      <lastmod>2026-11-02T18:31:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-function-y-mx-c-interactive-demo/sssssjro</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-function-y-mx-c-interactive-demo/sssssjro"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-function-y-mx-c-interactive-demo/sssssjro"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-function-y-mx-c-interactive-demo/sssssjro"/>
      <lastmod>2026-11-01T20:50:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-function-y-mx-c-interactive-demo/sssssjro</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-function-y-mx-c-interactive-demo/sssssjro"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-function-y-mx-c-interactive-demo/sssssjro"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-function-y-mx-c-interactive-demo/sssssjro"/>
      <lastmod>2026-11-01T20:50:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plot-a-translation-and-a-reflection/sssssjhs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plot-a-translation-and-a-reflection/sssssjhs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plot-a-translation-and-a-reflection/sssssjhs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plot-a-translation-and-a-reflection/sssssjhs"/>
      <lastmod>2026-11-02T17:47:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plot-a-translation-and-a-reflection/sssssjhs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plot-a-translation-and-a-reflection/sssssjhs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plot-a-translation-and-a-reflection/sssssjhs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plot-a-translation-and-a-reflection/sssssjhs"/>
      <lastmod>2026-11-02T17:47:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/approximating-area-the-trapezium-rule/sssssjh7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/approximating-area-the-trapezium-rule/sssssjh7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/approximating-area-the-trapezium-rule/sssssjh7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/approximating-area-the-trapezium-rule/sssssjh7"/>
      <lastmod>2026-11-02T17:38:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/approximating-area-the-trapezium-rule/sssssjh7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/approximating-area-the-trapezium-rule/sssssjh7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/approximating-area-the-trapezium-rule/sssssjh7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/approximating-area-the-trapezium-rule/sssssjh7"/>
      <lastmod>2026-11-02T17:38:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volumes-with-known-cross-sections/sssssjhn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-with-known-cross-sections/sssssjhn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-with-known-cross-sections/sssssjhn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-with-known-cross-sections/sssssjhn"/>
      <lastmod>2026-11-02T02:29:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volumes-with-known-cross-sections/sssssjhn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-with-known-cross-sections/sssssjhn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-with-known-cross-sections/sssssjhn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-with-known-cross-sections/sssssjhn"/>
      <lastmod>2026-11-02T02:29:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perspective-ellipse-demo/sssssjh2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perspective-ellipse-demo/sssssjh2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perspective-ellipse-demo/sssssjh2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perspective-ellipse-demo/sssssjh2"/>
      <lastmod>2026-11-02T03:17:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perspective-ellipse-demo/sssssjh2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perspective-ellipse-demo/sssssjh2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perspective-ellipse-demo/sssssjh2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perspective-ellipse-demo/sssssjh2"/>
      <lastmod>2026-11-02T03:17:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/completing-a-number-series/sssssjhk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/completing-a-number-series/sssssjhk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/completing-a-number-series/sssssjhk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/completing-a-number-series/sssssjhk"/>
      <lastmod>2026-11-01T20:53:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/completing-a-number-series/sssssjhk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/completing-a-number-series/sssssjhk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/completing-a-number-series/sssssjhk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/completing-a-number-series/sssssjhk"/>
      <lastmod>2026-11-01T20:53:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/how-to-open-any-resource-in-geogebra-app/sssssjhz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-to-open-any-resource-in-geogebra-app/sssssjhz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-to-open-any-resource-in-geogebra-app/sssssjhz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-to-open-any-resource-in-geogebra-app/sssssjhz"/>
      <lastmod>2026-11-01T21:37:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/how-to-open-any-resource-in-geogebra-app/sssssjhz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-to-open-any-resource-in-geogebra-app/sssssjhz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-to-open-any-resource-in-geogebra-app/sssssjhz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-to-open-any-resource-in-geogebra-app/sssssjhz"/>
      <lastmod>2026-11-01T21:37:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practice-with-percentages-and-double-number-lines/sssssjh0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-with-percentages-and-double-number-lines/sssssjh0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-with-percentages-and-double-number-lines/sssssjh0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-with-percentages-and-double-number-lines/sssssjh0"/>
      <lastmod>2026-11-01T23:07:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practice-with-percentages-and-double-number-lines/sssssjh0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-with-percentages-and-double-number-lines/sssssjh0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-with-percentages-and-double-number-lines/sssssjh0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-with-percentages-and-double-number-lines/sssssjh0"/>
      <lastmod>2026-11-01T23:07:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-rotations-in-the-coordinate-plane-by-scott-stark/sssssjhd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-rotations-in-the-coordinate-plane-by-scott-stark/sssssjhd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-rotations-in-the-coordinate-plane-by-scott-stark/sssssjhd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-rotations-in-the-coordinate-plane-by-scott-stark/sssssjhd"/>
      <lastmod>2026-11-02T02:20:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-rotations-in-the-coordinate-plane-by-scott-stark/sssssjhd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-rotations-in-the-coordinate-plane-by-scott-stark/sssssjhd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-rotations-in-the-coordinate-plane-by-scott-stark/sssssjhd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-rotations-in-the-coordinate-plane-by-scott-stark/sssssjhd"/>
      <lastmod>2026-11-02T02:20:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-without-words-area-of-the-triangle/sssssjhf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-without-words-area-of-the-triangle/sssssjhf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-without-words-area-of-the-triangle/sssssjhf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-without-words-area-of-the-triangle/sssssjhf"/>
      <lastmod>2026-11-01T21:02:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-without-words-area-of-the-triangle/sssssjhf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-without-words-area-of-the-triangle/sssssjhf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-without-words-area-of-the-triangle/sssssjhf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-without-words-area-of-the-triangle/sssssjhf"/>
      <lastmod>2026-11-01T21:02:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/random-numbers-generation-and-visualization/sssssjh8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-numbers-generation-and-visualization/sssssjh8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-numbers-generation-and-visualization/sssssjh8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-numbers-generation-and-visualization/sssssjh8"/>
      <lastmod>2026-11-02T03:17:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/random-numbers-generation-and-visualization/sssssjh8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-numbers-generation-and-visualization/sssssjh8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-numbers-generation-and-visualization/sssssjh8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-numbers-generation-and-visualization/sssssjh8"/>
      <lastmod>2026-11-02T03:17:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-6-4-12-lesson-fractional-lengths/sssssjhu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-4-12-lesson-fractional-lengths/sssssjhu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-4-12-lesson-fractional-lengths/sssssjhu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-4-12-lesson-fractional-lengths/sssssjhu"/>
      <lastmod>2026-11-01T20:30:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-6-4-12-lesson-fractional-lengths/sssssjhu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-4-12-lesson-fractional-lengths/sssssjhu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-4-12-lesson-fractional-lengths/sssssjhu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-4-12-lesson-fractional-lengths/sssssjhu"/>
      <lastmod>2026-11-01T20:30:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/connectivity-table-by-chris-cambr/sssssjh5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connectivity-table-by-chris-cambr/sssssjh5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connectivity-table-by-chris-cambr/sssssjh5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connectivity-table-by-chris-cambr/sssssjh5"/>
      <lastmod>2026-11-02T18:45:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/connectivity-table-by-chris-cambr/sssssjh5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connectivity-table-by-chris-cambr/sssssjh5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connectivity-table-by-chris-cambr/sssssjh5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connectivity-table-by-chris-cambr/sssssjh5"/>
      <lastmod>2026-11-02T18:45:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-functions-and-transformations/sssssjhb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-functions-and-transformations/sssssjhb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-functions-and-transformations/sssssjhb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-functions-and-transformations/sssssjhb"/>
      <lastmod>2026-11-02T18:19:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-functions-and-transformations/sssssjhb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-functions-and-transformations/sssssjhb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-functions-and-transformations/sssssjhb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-functions-and-transformations/sssssjhb"/>
      <lastmod>2026-11-02T18:19:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygon-construction-constant-angle-and-segment-length/sssssjh3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-construction-constant-angle-and-segment-length/sssssjh3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-construction-constant-angle-and-segment-length/sssssjh3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-construction-constant-angle-and-segment-length/sssssjh3"/>
      <lastmod>2026-11-01T20:52:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygon-construction-constant-angle-and-segment-length/sssssjh3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-construction-constant-angle-and-segment-length/sssssjh3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-construction-constant-angle-and-segment-length/sssssjh3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-construction-constant-angle-and-segment-length/sssssjh3"/>
      <lastmod>2026-11-01T20:52:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/squares-on-a-right-angled-triangle/sssssjhq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squares-on-a-right-angled-triangle/sssssjhq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squares-on-a-right-angled-triangle/sssssjhq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squares-on-a-right-angled-triangle/sssssjhq"/>
      <lastmod>2026-11-02T18:21:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/squares-on-a-right-angled-triangle/sssssjhq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squares-on-a-right-angled-triangle/sssssjhq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squares-on-a-right-angled-triangle/sssssjhq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squares-on-a-right-angled-triangle/sssssjhq"/>
      <lastmod>2026-11-02T18:21:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-by-components/sssssjh1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-by-components/sssssjh1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-by-components/sssssjh1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-by-components/sssssjh1"/>
      <lastmod>2026-11-01T23:42:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-by-components/sssssjh1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-by-components/sssssjh1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-by-components/sssssjh1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-by-components/sssssjh1"/>
      <lastmod>2026-11-01T23:42:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-graphs-10-ellipse-and-integral-curves-in-polar-coordinates/sssssjhm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-graphs-10-ellipse-and-integral-curves-in-polar-coordinates/sssssjhm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-graphs-10-ellipse-and-integral-curves-in-polar-coordinates/sssssjhm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-graphs-10-ellipse-and-integral-curves-in-polar-coordinates/sssssjhm"/>
      <lastmod>2026-11-01T21:20:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-graphs-10-ellipse-and-integral-curves-in-polar-coordinates/sssssjhm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-graphs-10-ellipse-and-integral-curves-in-polar-coordinates/sssssjhm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-graphs-10-ellipse-and-integral-curves-in-polar-coordinates/sssssjhm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-graphs-10-ellipse-and-integral-curves-in-polar-coordinates/sssssjhm"/>
      <lastmod>2026-11-01T21:20:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introducing-derivatives-the-slope-function/sssssjhj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introducing-derivatives-the-slope-function/sssssjhj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introducing-derivatives-the-slope-function/sssssjhj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introducing-derivatives-the-slope-function/sssssjhj"/>
      <lastmod>2026-11-02T10:38:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introducing-derivatives-the-slope-function/sssssjhj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introducing-derivatives-the-slope-function/sssssjhj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introducing-derivatives-the-slope-function/sssssjhj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introducing-derivatives-the-slope-function/sssssjhj"/>
      <lastmod>2026-11-02T10:38:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/combined-complex-multiplication-demonstration/sssssjhp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/combined-complex-multiplication-demonstration/sssssjhp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/combined-complex-multiplication-demonstration/sssssjhp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/combined-complex-multiplication-demonstration/sssssjhp"/>
      <lastmod>2026-11-01T21:18:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/combined-complex-multiplication-demonstration/sssssjhp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/combined-complex-multiplication-demonstration/sssssjhp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/combined-complex-multiplication-demonstration/sssssjhp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/combined-complex-multiplication-demonstration/sssssjhp"/>
      <lastmod>2026-11-01T21:18:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-complex-numbers-by-nrich-maths-project/sssssjhw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-complex-numbers-by-nrich-maths-project/sssssjhw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-complex-numbers-by-nrich-maths-project/sssssjhw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-complex-numbers-by-nrich-maths-project/sssssjhw"/>
      <lastmod>2026-11-02T15:52:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-complex-numbers-by-nrich-maths-project/sssssjhw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-complex-numbers-by-nrich-maths-project/sssssjhw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-complex-numbers-by-nrich-maths-project/sssssjhw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-complex-numbers-by-nrich-maths-project/sssssjhw"/>
      <lastmod>2026-11-02T15:52:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/curves-on-a-torus/sssssjh6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curves-on-a-torus/sssssjh6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curves-on-a-torus/sssssjh6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curves-on-a-torus/sssssjh6"/>
      <lastmod>2026-11-02T12:26:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/curves-on-a-torus/sssssjh6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curves-on-a-torus/sssssjh6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curves-on-a-torus/sssssjh6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curves-on-a-torus/sssssjh6"/>
      <lastmod>2026-11-02T12:26:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cissoid-of-diocles/sssssjhg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cissoid-of-diocles/sssssjhg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cissoid-of-diocles/sssssjhg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cissoid-of-diocles/sssssjhg"/>
      <lastmod>2026-11-02T00:32:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cissoid-of-diocles/sssssjhg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cissoid-of-diocles/sssssjhg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cissoid-of-diocles/sssssjhg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cissoid-of-diocles/sssssjhg"/>
      <lastmod>2026-11-02T00:32:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-construction-and-properties-by-dahlton-leach/sssssjh9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-and-properties-by-dahlton-leach/sssssjh9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-and-properties-by-dahlton-leach/sssssjh9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-and-properties-by-dahlton-leach/sssssjh9"/>
      <lastmod>2026-11-02T18:22:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-construction-and-properties-by-dahlton-leach/sssssjh9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-and-properties-by-dahlton-leach/sssssjh9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-and-properties-by-dahlton-leach/sssssjh9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-and-properties-by-dahlton-leach/sssssjh9"/>
      <lastmod>2026-11-02T18:22:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-twin-arch-maria-sfichi/sssssjhe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-twin-arch-maria-sfichi/sssssjhe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-twin-arch-maria-sfichi/sssssjhe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-twin-arch-maria-sfichi/sssssjhe"/>
      <lastmod>2026-11-02T18:33:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-twin-arch-maria-sfichi/sssssjhe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-twin-arch-maria-sfichi/sssssjhe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-twin-arch-maria-sfichi/sssssjhe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-twin-arch-maria-sfichi/sssssjhe"/>
      <lastmod>2026-11-02T18:33:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/n-point-circle/sssssjhv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/n-point-circle/sssssjhv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/n-point-circle/sssssjhv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/n-point-circle/sssssjhv"/>
      <lastmod>2026-11-01T23:53:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/n-point-circle/sssssjhv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/n-point-circle/sssssjhv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/n-point-circle/sssssjhv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/n-point-circle/sssssjhv"/>
      <lastmod>2026-11-01T23:53:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graph-of-sine-and-cosine/sssssjh4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-of-sine-and-cosine/sssssjh4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-of-sine-and-cosine/sssssjh4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-of-sine-and-cosine/sssssjh4"/>
      <lastmod>2026-11-02T17:15:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graph-of-sine-and-cosine/sssssjh4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-of-sine-and-cosine/sssssjh4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-of-sine-and-cosine/sssssjh4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-of-sine-and-cosine/sssssjh4"/>
      <lastmod>2026-11-02T17:15:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-trigonometric-ratios-by-david-boudreaux/sssssjhl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-trigonometric-ratios-by-david-boudreaux/sssssjhl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-trigonometric-ratios-by-david-boudreaux/sssssjhl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-trigonometric-ratios-by-david-boudreaux/sssssjhl"/>
      <lastmod>2026-11-02T16:54:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-trigonometric-ratios-by-david-boudreaux/sssssjhl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-trigonometric-ratios-by-david-boudreaux/sssssjhl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-trigonometric-ratios-by-david-boudreaux/sssssjhl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-trigonometric-ratios-by-david-boudreaux/sssssjhl"/>
      <lastmod>2026-11-02T16:54:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflections-over-two-intersecting-lines/sssssjhy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-over-two-intersecting-lines/sssssjhy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-over-two-intersecting-lines/sssssjhy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-over-two-intersecting-lines/sssssjhy"/>
      <lastmod>2026-11-02T17:18:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflections-over-two-intersecting-lines/sssssjhy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-over-two-intersecting-lines/sssssjhy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-over-two-intersecting-lines/sssssjhy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-over-two-intersecting-lines/sssssjhy"/>
      <lastmod>2026-11-02T17:18:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-circumference-constrained-by-parabola/sssssjha</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-circumference-constrained-by-parabola/sssssjha"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-circumference-constrained-by-parabola/sssssjha"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-circumference-constrained-by-parabola/sssssjha"/>
      <lastmod>2026-11-01T23:25:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-circumference-constrained-by-parabola/sssssjha</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-circumference-constrained-by-parabola/sssssjha"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-circumference-constrained-by-parabola/sssssjha"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-circumference-constrained-by-parabola/sssssjha"/>
      <lastmod>2026-11-01T23:25:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volumes-of-cylinders/sssssjhc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-of-cylinders/sssssjhc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-of-cylinders/sssssjhc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-of-cylinders/sssssjhc"/>
      <lastmod>2026-11-02T17:37:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volumes-of-cylinders/sssssjhc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volumes-of-cylinders/sssssjhc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volumes-of-cylinders/sssssjhc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volumes-of-cylinders/sssssjhc"/>
      <lastmod>2026-11-02T17:37:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-of-circle-theorem-with-isosceles-triangles/sssssjhr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-circle-theorem-with-isosceles-triangles/sssssjhr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-circle-theorem-with-isosceles-triangles/sssssjhr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-circle-theorem-with-isosceles-triangles/sssssjhr"/>
      <lastmod>2026-11-02T08:38:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-of-circle-theorem-with-isosceles-triangles/sssssjhr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-circle-theorem-with-isosceles-triangles/sssssjhr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-circle-theorem-with-isosceles-triangles/sssssjhr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-circle-theorem-with-isosceles-triangles/sssssjhr"/>
      <lastmod>2026-11-02T08:38:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-functions-and-geometric-constructions/sssssjhh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-functions-and-geometric-constructions/sssssjhh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-functions-and-geometric-constructions/sssssjhh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-functions-and-geometric-constructions/sssssjhh"/>
      <lastmod>2026-11-02T18:14:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-functions-and-geometric-constructions/sssssjhh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-functions-and-geometric-constructions/sssssjhh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-functions-and-geometric-constructions/sssssjhh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-functions-and-geometric-constructions/sssssjhh"/>
      <lastmod>2026-11-02T18:14:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-squaring-real-numbers/sssssjht</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-squaring-real-numbers/sssssjht"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-squaring-real-numbers/sssssjht"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-squaring-real-numbers/sssssjht"/>
      <lastmod>2026-11-01T19:27:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-squaring-real-numbers/sssssjht</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-squaring-real-numbers/sssssjht"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-squaring-real-numbers/sssssjht"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-squaring-real-numbers/sssssjht"/>
      <lastmod>2026-11-01T19:27:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/general-formulas-for-circle-ellipse-hyperbola/sssssjhx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/general-formulas-for-circle-ellipse-hyperbola/sssssjhx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/general-formulas-for-circle-ellipse-hyperbola/sssssjhx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/general-formulas-for-circle-ellipse-hyperbola/sssssjhx"/>
      <lastmod>2026-11-02T12:29:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/general-formulas-for-circle-ellipse-hyperbola/sssssjhx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/general-formulas-for-circle-ellipse-hyperbola/sssssjhx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/general-formulas-for-circle-ellipse-hyperbola/sssssjhx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/general-formulas-for-circle-ellipse-hyperbola/sssssjhx"/>
      <lastmod>2026-11-02T12:29:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rugby-shape-and-its-perimeter/sssssjhi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rugby-shape-and-its-perimeter/sssssjhi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rugby-shape-and-its-perimeter/sssssjhi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rugby-shape-and-its-perimeter/sssssjhi"/>
      <lastmod>2026-11-01T23:20:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rugby-shape-and-its-perimeter/sssssjhi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rugby-shape-and-its-perimeter/sssssjhi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rugby-shape-and-its-perimeter/sssssjhi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rugby-shape-and-its-perimeter/sssssjhi"/>
      <lastmod>2026-11-01T23:20:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/heptagon-rotational-symmetry/sssssjho</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/heptagon-rotational-symmetry/sssssjho"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/heptagon-rotational-symmetry/sssssjho"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/heptagon-rotational-symmetry/sssssjho"/>
      <lastmod>2026-11-02T16:43:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/heptagon-rotational-symmetry/sssssjho</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/heptagon-rotational-symmetry/sssssjho"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/heptagon-rotational-symmetry/sssssjho"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/heptagon-rotational-symmetry/sssssjho"/>
      <lastmod>2026-11-02T16:43:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-cone-cylinder/sssssjts</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-cone-cylinder/sssssjts"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-cone-cylinder/sssssjts"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-cone-cylinder/sssssjts"/>
      <lastmod>2026-11-02T16:55:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-cone-cylinder/sssssjts</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-cone-cylinder/sssssjts"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-cone-cylinder/sssssjts"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-cone-cylinder/sssssjts"/>
      <lastmod>2026-11-02T16:55:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/application-of-equation-of-motion-in-pulleys/sssssjt7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/application-of-equation-of-motion-in-pulleys/sssssjt7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/application-of-equation-of-motion-in-pulleys/sssssjt7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/application-of-equation-of-motion-in-pulleys/sssssjt7"/>
      <lastmod>2026-11-02T18:10:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/application-of-equation-of-motion-in-pulleys/sssssjt7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/application-of-equation-of-motion-in-pulleys/sssssjt7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/application-of-equation-of-motion-in-pulleys/sssssjt7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/application-of-equation-of-motion-in-pulleys/sssssjt7"/>
      <lastmod>2026-11-02T18:10:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-vs-normal-distribution/sssssjtn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-vs-normal-distribution/sssssjtn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-vs-normal-distribution/sssssjtn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-vs-normal-distribution/sssssjtn"/>
      <lastmod>2026-11-01T21:12:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-vs-normal-distribution/sssssjtn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-vs-normal-distribution/sssssjtn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-vs-normal-distribution/sssssjtn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-vs-normal-distribution/sssssjtn"/>
      <lastmod>2026-11-01T21:12:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/using-diagrams-to-represent-addition-and-subtraction-1/sssssjt2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-diagrams-to-represent-addition-and-subtraction-1/sssssjt2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-diagrams-to-represent-addition-and-subtraction-1/sssssjt2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-diagrams-to-represent-addition-and-subtraction-1/sssssjt2"/>
      <lastmod>2026-11-01T20:25:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/using-diagrams-to-represent-addition-and-subtraction-1/sssssjt2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-diagrams-to-represent-addition-and-subtraction-1/sssssjt2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-diagrams-to-represent-addition-and-subtraction-1/sssssjt2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-diagrams-to-represent-addition-and-subtraction-1/sssssjt2"/>
      <lastmod>2026-11-01T20:25:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-arcs/sssssjtk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-arcs/sssssjtk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-arcs/sssssjtk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-arcs/sssssjtk"/>
      <lastmod>2026-11-02T16:52:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-arcs/sssssjtk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-arcs/sssssjtk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-arcs/sssssjtk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-arcs/sssssjtk"/>
      <lastmod>2026-11-02T16:52:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-circumference-and-area/sssssjtz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-circumference-and-area/sssssjtz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-circumference-and-area/sssssjtz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-circumference-and-area/sssssjtz"/>
      <lastmod>2026-11-02T17:06:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-circumference-and-area/sssssjtz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-circumference-and-area/sssssjtz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-circumference-and-area/sssssjtz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-circumference-and-area/sssssjtz"/>
      <lastmod>2026-11-02T17:06:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/position-velocity-and-acceleration-vs-time-graphs/sssssjt0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/position-velocity-and-acceleration-vs-time-graphs/sssssjt0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/position-velocity-and-acceleration-vs-time-graphs/sssssjt0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/position-velocity-and-acceleration-vs-time-graphs/sssssjt0"/>
      <lastmod>2026-11-01T21:40:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/position-velocity-and-acceleration-vs-time-graphs/sssssjt0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/position-velocity-and-acceleration-vs-time-graphs/sssssjt0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/position-velocity-and-acceleration-vs-time-graphs/sssssjt0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/position-velocity-and-acceleration-vs-time-graphs/sssssjt0"/>
      <lastmod>2026-11-01T21:40:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-circles-family-dynamic-construction-in-geogebra/sssssjtd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-circles-family-dynamic-construction-in-geogebra/sssssjtd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-circles-family-dynamic-construction-in-geogebra/sssssjtd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-circles-family-dynamic-construction-in-geogebra/sssssjtd"/>
      <lastmod>2026-11-01T21:37:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-circles-family-dynamic-construction-in-geogebra/sssssjtd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-circles-family-dynamic-construction-in-geogebra/sssssjtd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-circles-family-dynamic-construction-in-geogebra/sssssjtd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-circles-family-dynamic-construction-in-geogebra/sssssjtd"/>
      <lastmod>2026-11-01T21:37:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sequence-from-two-terms-interactive-random-generation/sssssjtf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sequence-from-two-terms-interactive-random-generation/sssssjtf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sequence-from-two-terms-interactive-random-generation/sssssjtf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sequence-from-two-terms-interactive-random-generation/sssssjtf"/>
      <lastmod>2026-11-02T03:17:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sequence-from-two-terms-interactive-random-generation/sssssjtf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sequence-from-two-terms-interactive-random-generation/sssssjtf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sequence-from-two-terms-interactive-random-generation/sssssjtf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sequence-from-two-terms-interactive-random-generation/sssssjtf"/>
      <lastmod>2026-11-02T03:17:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sums-of-rectangles/sssssjt8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sums-of-rectangles/sssssjt8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sums-of-rectangles/sssssjt8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sums-of-rectangles/sssssjt8"/>
      <lastmod>2026-11-02T10:39:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sums-of-rectangles/sssssjt8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sums-of-rectangles/sssssjt8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sums-of-rectangles/sssssjt8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sums-of-rectangles/sssssjt8"/>
      <lastmod>2026-11-02T10:39:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/composite-of-reflections-visualizing-two-successive-mirror-transformations/sssssjtu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/composite-of-reflections-visualizing-two-successive-mirror-transformations/sssssjtu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/composite-of-reflections-visualizing-two-successive-mirror-transformations/sssssjtu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/composite-of-reflections-visualizing-two-successive-mirror-transformations/sssssjtu"/>
      <lastmod>2026-11-02T00:16:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/composite-of-reflections-visualizing-two-successive-mirror-transformations/sssssjtu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/composite-of-reflections-visualizing-two-successive-mirror-transformations/sssssjtu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/composite-of-reflections-visualizing-two-successive-mirror-transformations/sssssjtu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/composite-of-reflections-visualizing-two-successive-mirror-transformations/sssssjtu"/>
      <lastmod>2026-11-02T00:16:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-of-revolution-by-gary-rubinstein/sssssjt5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-by-gary-rubinstein/sssssjt5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-by-gary-rubinstein/sssssjt5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-by-gary-rubinstein/sssssjt5"/>
      <lastmod>2026-11-01T23:22:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-of-revolution-by-gary-rubinstein/sssssjt5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-by-gary-rubinstein/sssssjt5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-by-gary-rubinstein/sssssjt5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-by-gary-rubinstein/sssssjt5"/>
      <lastmod>2026-11-01T23:22:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/squares-and-parallelograms-on-triangle-by-doug-kuhlmann/sssssjtb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squares-and-parallelograms-on-triangle-by-doug-kuhlmann/sssssjtb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squares-and-parallelograms-on-triangle-by-doug-kuhlmann/sssssjtb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squares-and-parallelograms-on-triangle-by-doug-kuhlmann/sssssjtb"/>
      <lastmod>2026-11-02T18:58:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/squares-and-parallelograms-on-triangle-by-doug-kuhlmann/sssssjtb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squares-and-parallelograms-on-triangle-by-doug-kuhlmann/sssssjtb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squares-and-parallelograms-on-triangle-by-doug-kuhlmann/sssssjtb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squares-and-parallelograms-on-triangle-by-doug-kuhlmann/sssssjtb"/>
      <lastmod>2026-11-02T18:58:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-and-classifying-critical-points-with-hessian-matrix/sssssjt3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-and-classifying-critical-points-with-hessian-matrix/sssssjt3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-and-classifying-critical-points-with-hessian-matrix/sssssjt3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-and-classifying-critical-points-with-hessian-matrix/sssssjt3"/>
      <lastmod>2026-11-01T23:27:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-and-classifying-critical-points-with-hessian-matrix/sssssjt3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-and-classifying-critical-points-with-hessian-matrix/sssssjt3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-and-classifying-critical-points-with-hessian-matrix/sssssjt3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-and-classifying-critical-points-with-hessian-matrix/sssssjt3"/>
      <lastmod>2026-11-01T23:27:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-transformations-of-reciprocal-functions/sssssjtq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-transformations-of-reciprocal-functions/sssssjtq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-transformations-of-reciprocal-functions/sssssjtq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-transformations-of-reciprocal-functions/sssssjtq"/>
      <lastmod>2026-11-02T18:55:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-transformations-of-reciprocal-functions/sssssjtq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-transformations-of-reciprocal-functions/sssssjtq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-transformations-of-reciprocal-functions/sssssjtq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-transformations-of-reciprocal-functions/sssssjtq"/>
      <lastmod>2026-11-02T18:55:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-graphs-of-sin-cos-tan-by-silvia/sssssjt1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-graphs-of-sin-cos-tan-by-silvia/sssssjt1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-graphs-of-sin-cos-tan-by-silvia/sssssjt1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-graphs-of-sin-cos-tan-by-silvia/sssssjt1"/>
      <lastmod>2026-11-02T18:29:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-graphs-of-sin-cos-tan-by-silvia/sssssjt1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-graphs-of-sin-cos-tan-by-silvia/sssssjt1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-graphs-of-sin-cos-tan-by-silvia/sssssjt1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-graphs-of-sin-cos-tan-by-silvia/sssssjt1"/>
      <lastmod>2026-11-02T18:29:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pentagonal-prism/sssssjtm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pentagonal-prism/sssssjtm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pentagonal-prism/sssssjtm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pentagonal-prism/sssssjtm"/>
      <lastmod>2026-11-01T23:08:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pentagonal-prism/sssssjtm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pentagonal-prism/sssssjtm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pentagonal-prism/sssssjtm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pentagonal-prism/sssssjtm"/>
      <lastmod>2026-11-01T23:08:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-a-function-rotated-around-the-y-axis/sssssjtj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-function-rotated-around-the-y-axis/sssssjtj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-function-rotated-around-the-y-axis/sssssjtj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-function-rotated-around-the-y-axis/sssssjtj"/>
      <lastmod>2026-11-02T17:47:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-a-function-rotated-around-the-y-axis/sssssjtj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-function-rotated-around-the-y-axis/sssssjtj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-function-rotated-around-the-y-axis/sssssjtj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-function-rotated-around-the-y-axis/sssssjtj"/>
      <lastmod>2026-11-02T17:47:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-space-by-judah-l-schwartz/sssssjtp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-space-by-judah-l-schwartz/sssssjtp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-space-by-judah-l-schwartz/sssssjtp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-space-by-judah-l-schwartz/sssssjtp"/>
      <lastmod>2026-11-02T16:59:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-space-by-judah-l-schwartz/sssssjtp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-space-by-judah-l-schwartz/sssssjtp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-space-by-judah-l-schwartz/sssssjtp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-space-by-judah-l-schwartz/sssssjtp"/>
      <lastmod>2026-11-02T16:59:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/open-cube-to-octahedron/sssssjtw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/open-cube-to-octahedron/sssssjtw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/open-cube-to-octahedron/sssssjtw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/open-cube-to-octahedron/sssssjtw"/>
      <lastmod>2026-11-01T23:10:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/open-cube-to-octahedron/sssssjtw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/open-cube-to-octahedron/sssssjtw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/open-cube-to-octahedron/sssssjtw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/open-cube-to-octahedron/sssssjtw"/>
      <lastmod>2026-11-01T23:10:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-distribution-demo-by-neil/sssssjt6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-demo-by-neil/sssssjt6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-demo-by-neil/sssssjt6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-demo-by-neil/sssssjt6"/>
      <lastmod>2026-11-02T17:11:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-distribution-demo-by-neil/sssssjt6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-demo-by-neil/sssssjt6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-demo-by-neil/sssssjt6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-demo-by-neil/sssssjt6"/>
      <lastmod>2026-11-02T17:11:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construct-the-orthocenter-of-a-triangle/sssssjtg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-the-orthocenter-of-a-triangle/sssssjtg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-the-orthocenter-of-a-triangle/sssssjtg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-the-orthocenter-of-a-triangle/sssssjtg"/>
      <lastmod>2026-11-02T12:19:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construct-the-orthocenter-of-a-triangle/sssssjtg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-the-orthocenter-of-a-triangle/sssssjtg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-the-orthocenter-of-a-triangle/sssssjtg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-the-orthocenter-of-a-triangle/sssssjtg"/>
      <lastmod>2026-11-02T12:19:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-as-envelope-of-segments/sssssjt9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-as-envelope-of-segments/sssssjt9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-as-envelope-of-segments/sssssjt9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-as-envelope-of-segments/sssssjt9"/>
      <lastmod>2026-11-02T02:23:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-as-envelope-of-segments/sssssjt9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-as-envelope-of-segments/sssssjt9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-as-envelope-of-segments/sssssjt9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-as-envelope-of-segments/sssssjt9"/>
      <lastmod>2026-11-02T02:23:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/approximating-small-angles-using-graphs/sssssjte</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/approximating-small-angles-using-graphs/sssssjte"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/approximating-small-angles-using-graphs/sssssjte"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/approximating-small-angles-using-graphs/sssssjte"/>
      <lastmod>2026-11-02T00:33:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/approximating-small-angles-using-graphs/sssssjte</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/approximating-small-angles-using-graphs/sssssjte"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/approximating-small-angles-using-graphs/sssssjte"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/approximating-small-angles-using-graphs/sssssjte"/>
      <lastmod>2026-11-02T00:33:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-matching-2/sssssjtv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-matching-2/sssssjtv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-matching-2/sssssjtv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-matching-2/sssssjtv"/>
      <lastmod>2026-11-02T17:18:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-matching-2/sssssjtv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-matching-2/sssssjtv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-matching-2/sssssjtv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-matching-2/sssssjtv"/>
      <lastmod>2026-11-02T17:18:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-illustration-of-line-equation/sssssjt4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-line-equation/sssssjt4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-line-equation/sssssjt4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-line-equation/sssssjt4"/>
      <lastmod>2026-11-01T20:56:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-illustration-of-line-equation/sssssjt4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-line-equation/sssssjt4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-line-equation/sssssjt4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-line-equation/sssssjt4"/>
      <lastmod>2026-11-01T20:56:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadrilateral-exterior-angle-sum-activity/sssssjtl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-exterior-angle-sum-activity/sssssjtl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-exterior-angle-sum-activity/sssssjtl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-exterior-angle-sum-activity/sssssjtl"/>
      <lastmod>2026-11-02T00:09:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadrilateral-exterior-angle-sum-activity/sssssjtl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-exterior-angle-sum-activity/sssssjtl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-exterior-angle-sum-activity/sssssjtl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-exterior-angle-sum-activity/sssssjtl"/>
      <lastmod>2026-11-02T00:09:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylindrical-perspective-of-a-prism/sssssjty</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylindrical-perspective-of-a-prism/sssssjty"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylindrical-perspective-of-a-prism/sssssjty"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylindrical-perspective-of-a-prism/sssssjty"/>
      <lastmod>2026-11-01T23:09:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylindrical-perspective-of-a-prism/sssssjty</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylindrical-perspective-of-a-prism/sssssjty"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylindrical-perspective-of-a-prism/sssssjty"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylindrical-perspective-of-a-prism/sssssjty"/>
      <lastmod>2026-11-01T23:09:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-adjacent-angles-demo/sssssjta</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-adjacent-angles-demo/sssssjta"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-adjacent-angles-demo/sssssjta"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-adjacent-angles-demo/sssssjta"/>
      <lastmod>2026-11-01T21:11:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-adjacent-angles-demo/sssssjta</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-adjacent-angles-demo/sssssjta"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-adjacent-angles-demo/sssssjta"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-adjacent-angles-demo/sssssjta"/>
      <lastmod>2026-11-01T21:11:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/special-right-triangles-by-michael-bewley/sssssjtc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-right-triangles-by-michael-bewley/sssssjtc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-right-triangles-by-michael-bewley/sssssjtc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-right-triangles-by-michael-bewley/sssssjtc"/>
      <lastmod>2026-11-02T13:41:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/special-right-triangles-by-michael-bewley/sssssjtc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-right-triangles-by-michael-bewley/sssssjtc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-right-triangles-by-michael-bewley/sssssjtc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-right-triangles-by-michael-bewley/sssssjtc"/>
      <lastmod>2026-11-02T13:41:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proving-triangles-similar-using-geometric-transformations-exercise-3-1/sssssjtr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proving-triangles-similar-using-geometric-transformations-exercise-3-1/sssssjtr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proving-triangles-similar-using-geometric-transformations-exercise-3-1/sssssjtr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proving-triangles-similar-using-geometric-transformations-exercise-3-1/sssssjtr"/>
      <lastmod>2026-11-01T21:44:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proving-triangles-similar-using-geometric-transformations-exercise-3-1/sssssjtr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proving-triangles-similar-using-geometric-transformations-exercise-3-1/sssssjtr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proving-triangles-similar-using-geometric-transformations-exercise-3-1/sssssjtr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proving-triangles-similar-using-geometric-transformations-exercise-3-1/sssssjtr"/>
      <lastmod>2026-11-01T21:44:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-calculation-demo/sssssjth</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-calculation-demo/sssssjth"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-calculation-demo/sssssjth"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-calculation-demo/sssssjth"/>
      <lastmod>2026-11-01T21:13:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-calculation-demo/sssssjth</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-calculation-demo/sssssjth"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-calculation-demo/sssssjth"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-calculation-demo/sssssjth"/>
      <lastmod>2026-11-01T21:13:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-sound-of-a-sine-wave-visualization/sssssjtt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-sound-of-a-sine-wave-visualization/sssssjtt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-sound-of-a-sine-wave-visualization/sssssjtt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-sound-of-a-sine-wave-visualization/sssssjtt"/>
      <lastmod>2026-11-02T00:34:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-sound-of-a-sine-wave-visualization/sssssjtt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-sound-of-a-sine-wave-visualization/sssssjtt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-sound-of-a-sine-wave-visualization/sssssjtt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-sound-of-a-sine-wave-visualization/sssssjtt"/>
      <lastmod>2026-11-02T00:34:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/variable-parabola-string-art/sssssjtx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/variable-parabola-string-art/sssssjtx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/variable-parabola-string-art/sssssjtx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/variable-parabola-string-art/sssssjtx"/>
      <lastmod>2026-11-01T19:14:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/variable-parabola-string-art/sssssjtx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/variable-parabola-string-art/sssssjtx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/variable-parabola-string-art/sssssjtx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/variable-parabola-string-art/sssssjtx"/>
      <lastmod>2026-11-01T19:14:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sailing-challenges/sssssjti</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sailing-challenges/sssssjti"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sailing-challenges/sssssjti"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sailing-challenges/sssssjti"/>
      <lastmod>2026-11-02T02:21:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sailing-challenges/sssssjti</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sailing-challenges/sssssjti"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sailing-challenges/sssssjti"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sailing-challenges/sssssjti"/>
      <lastmod>2026-11-02T02:21:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perimeter-and-area-of-a-square/sssssjto</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-and-area-of-a-square/sssssjto"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-and-area-of-a-square/sssssjto"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-and-area-of-a-square/sssssjto"/>
      <lastmod>2026-11-01T19:05:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perimeter-and-area-of-a-square/sssssjto</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-and-area-of-a-square/sssssjto"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-and-area-of-a-square/sssssjto"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-and-area-of-a-square/sssssjto"/>
      <lastmod>2026-11-01T19:05:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-through-the-four-intersection-points-of-two-quads/sssssjxs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-through-the-four-intersection-points-of-two-quads/sssssjxs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-through-the-four-intersection-points-of-two-quads/sssssjxs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-through-the-four-intersection-points-of-two-quads/sssssjxs"/>
      <lastmod>2026-11-01T23:51:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-through-the-four-intersection-points-of-two-quads/sssssjxs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-through-the-four-intersection-points-of-two-quads/sssssjxs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-through-the-four-intersection-points-of-two-quads/sssssjxs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-through-the-four-intersection-points-of-two-quads/sssssjxs"/>
      <lastmod>2026-11-01T23:51:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-quadratic-functions-intercept-form-by-kristen-ehrler-2/sssssjx7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-intercept-form-by-kristen-ehrler-2/sssssjx7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-functions-intercept-form-by-kristen-ehrler-2/sssssjx7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-intercept-form-by-kristen-ehrler-2/sssssjx7"/>
      <lastmod>2026-11-01T21:52:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-quadratic-functions-intercept-form-by-kristen-ehrler-2/sssssjx7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-intercept-form-by-kristen-ehrler-2/sssssjx7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-functions-intercept-form-by-kristen-ehrler-2/sssssjx7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-intercept-form-by-kristen-ehrler-2/sssssjx7"/>
      <lastmod>2026-11-01T21:52:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/understanding-euler-s-identity/sssssjxn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/understanding-euler-s-identity/sssssjxn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/understanding-euler-s-identity/sssssjxn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/understanding-euler-s-identity/sssssjxn"/>
      <lastmod>2026-11-01T20:44:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/understanding-euler-s-identity/sssssjxn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/understanding-euler-s-identity/sssssjxn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/understanding-euler-s-identity/sssssjxn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/understanding-euler-s-identity/sssssjxn"/>
      <lastmod>2026-11-01T20:44:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-surface-and-curve/sssssjx2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-surface-and-curve/sssssjx2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-surface-and-curve/sssssjx2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-surface-and-curve/sssssjx2"/>
      <lastmod>2026-11-02T16:36:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-surface-and-curve/sssssjx2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-surface-and-curve/sssssjx2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-surface-and-curve/sssssjx2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-surface-and-curve/sssssjx2"/>
      <lastmod>2026-11-02T16:36:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mth23a-spherical-coordinates/sssssjxk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mth23a-spherical-coordinates/sssssjxk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mth23a-spherical-coordinates/sssssjxk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mth23a-spherical-coordinates/sssssjxk"/>
      <lastmod>2026-11-01T21:24:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mth23a-spherical-coordinates/sssssjxk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mth23a-spherical-coordinates/sssssjxk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mth23a-spherical-coordinates/sssssjxk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mth23a-spherical-coordinates/sssssjxk"/>
      <lastmod>2026-11-01T21:24:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/projection-of-a-cube-on-a-plane/sssssjxz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/projection-of-a-cube-on-a-plane/sssssjxz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/projection-of-a-cube-on-a-plane/sssssjxz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/projection-of-a-cube-on-a-plane/sssssjxz"/>
      <lastmod>2026-11-01T22:00:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/projection-of-a-cube-on-a-plane/sssssjxz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/projection-of-a-cube-on-a-plane/sssssjxz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/projection-of-a-cube-on-a-plane/sssssjxz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/projection-of-a-cube-on-a-plane/sssssjxz"/>
      <lastmod>2026-11-01T22:00:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-mean-fun/sssssjx0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-mean-fun/sssssjx0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-mean-fun/sssssjx0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-mean-fun/sssssjx0"/>
      <lastmod>2026-11-02T18:04:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-mean-fun/sssssjx0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-mean-fun/sssssjx0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-mean-fun/sssssjx0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-mean-fun/sssssjx0"/>
      <lastmod>2026-11-02T18:04:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-demo-of-linear-equations-and-statistical-graphs/sssssjxd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demo-of-linear-equations-and-statistical-graphs/sssssjxd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demo-of-linear-equations-and-statistical-graphs/sssssjxd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demo-of-linear-equations-and-statistical-graphs/sssssjxd"/>
      <lastmod>2026-11-02T16:46:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-demo-of-linear-equations-and-statistical-graphs/sssssjxd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demo-of-linear-equations-and-statistical-graphs/sssssjxd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demo-of-linear-equations-and-statistical-graphs/sssssjxd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demo-of-linear-equations-and-statistical-graphs/sssssjxd"/>
      <lastmod>2026-11-02T16:46:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-sort-of-multiples-of-4/sssssjxf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-sort-of-multiples-of-4/sssssjxf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-sort-of-multiples-of-4/sssssjxf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-sort-of-multiples-of-4/sssssjxf"/>
      <lastmod>2026-11-01T19:16:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-sort-of-multiples-of-4/sssssjxf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-sort-of-multiples-of-4/sssssjxf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-sort-of-multiples-of-4/sssssjxf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-sort-of-multiples-of-4/sssssjxf"/>
      <lastmod>2026-11-01T19:16:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/distributed-loads-analysis/sssssjx8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distributed-loads-analysis/sssssjx8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distributed-loads-analysis/sssssjx8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distributed-loads-analysis/sssssjx8"/>
      <lastmod>2026-11-01T21:43:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/distributed-loads-analysis/sssssjx8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distributed-loads-analysis/sssssjx8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distributed-loads-analysis/sssssjx8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distributed-loads-analysis/sssssjx8"/>
      <lastmod>2026-11-01T21:43:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/paraboloid-views-exploring-surfaces-and-intersections/sssssjxu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/paraboloid-views-exploring-surfaces-and-intersections/sssssjxu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/paraboloid-views-exploring-surfaces-and-intersections/sssssjxu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/paraboloid-views-exploring-surfaces-and-intersections/sssssjxu"/>
      <lastmod>2026-11-01T19:11:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/paraboloid-views-exploring-surfaces-and-intersections/sssssjxu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/paraboloid-views-exploring-surfaces-and-intersections/sssssjxu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/paraboloid-views-exploring-surfaces-and-intersections/sssssjxu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/paraboloid-views-exploring-surfaces-and-intersections/sssssjxu"/>
      <lastmod>2026-11-01T19:11:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/egg-surface-modeling-3d-geometric-construction-example/sssssjx5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/egg-surface-modeling-3d-geometric-construction-example/sssssjx5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/egg-surface-modeling-3d-geometric-construction-example/sssssjx5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/egg-surface-modeling-3d-geometric-construction-example/sssssjx5"/>
      <lastmod>2026-11-02T00:06:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/egg-surface-modeling-3d-geometric-construction-example/sssssjx5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/egg-surface-modeling-3d-geometric-construction-example/sssssjx5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/egg-surface-modeling-3d-geometric-construction-example/sssssjx5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/egg-surface-modeling-3d-geometric-construction-example/sssssjx5"/>
      <lastmod>2026-11-02T00:06:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cross-section-of-a-cylinder/sssssjxb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-section-of-a-cylinder/sssssjxb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-section-of-a-cylinder/sssssjxb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-section-of-a-cylinder/sssssjxb"/>
      <lastmod>2026-11-01T19:08:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cross-section-of-a-cylinder/sssssjxb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-section-of-a-cylinder/sssssjxb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-section-of-a-cylinder/sssssjxb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-section-of-a-cylinder/sssssjxb"/>
      <lastmod>2026-11-01T19:08:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperboloid-surface/sssssjx3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperboloid-surface/sssssjx3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperboloid-surface/sssssjx3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperboloid-surface/sssssjx3"/>
      <lastmod>2026-11-02T02:46:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperboloid-surface/sssssjx3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperboloid-surface/sssssjx3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperboloid-surface/sssssjx3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperboloid-surface/sssssjx3"/>
      <lastmod>2026-11-02T02:46:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/oblique-pyramid-construction-and-demonstration/sssssjxq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-pyramid-construction-and-demonstration/sssssjxq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-pyramid-construction-and-demonstration/sssssjxq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-pyramid-construction-and-demonstration/sssssjxq"/>
      <lastmod>2026-11-02T17:08:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/oblique-pyramid-construction-and-demonstration/sssssjxq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-pyramid-construction-and-demonstration/sssssjxq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-pyramid-construction-and-demonstration/sssssjxq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-pyramid-construction-and-demonstration/sssssjxq"/>
      <lastmod>2026-11-02T17:08:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplying-1-digit-and-decimal-numbers/sssssjx1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-1-digit-and-decimal-numbers/sssssjx1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-1-digit-and-decimal-numbers/sssssjx1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-1-digit-and-decimal-numbers/sssssjx1"/>
      <lastmod>2026-11-02T09:19:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplying-1-digit-and-decimal-numbers/sssssjx1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-1-digit-and-decimal-numbers/sssssjx1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-1-digit-and-decimal-numbers/sssssjx1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-1-digit-and-decimal-numbers/sssssjx1"/>
      <lastmod>2026-11-02T09:19:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/making-triangles-on-isometric-grid/sssssjxm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-triangles-on-isometric-grid/sssssjxm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-triangles-on-isometric-grid/sssssjxm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-triangles-on-isometric-grid/sssssjxm"/>
      <lastmod>2026-11-01T19:06:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/making-triangles-on-isometric-grid/sssssjxm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-triangles-on-isometric-grid/sssssjxm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-triangles-on-isometric-grid/sssssjxm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-triangles-on-isometric-grid/sssssjxm"/>
      <lastmod>2026-11-01T19:06:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-surface-area-by-d-riley/sssssjxj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-surface-area-by-d-riley/sssssjxj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-surface-area-by-d-riley/sssssjxj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-surface-area-by-d-riley/sssssjxj"/>
      <lastmod>2026-11-02T18:12:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-surface-area-by-d-riley/sssssjxj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-surface-area-by-d-riley/sssssjxj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-surface-area-by-d-riley/sssssjxj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-surface-area-by-d-riley/sssssjxj"/>
      <lastmod>2026-11-02T18:12:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-similar-right-triangles-by-mallory-cumpstone/sssssjxp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-similar-right-triangles-by-mallory-cumpstone/sssssjxp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-similar-right-triangles-by-mallory-cumpstone/sssssjxp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-similar-right-triangles-by-mallory-cumpstone/sssssjxp"/>
      <lastmod>2026-11-02T17:49:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-similar-right-triangles-by-mallory-cumpstone/sssssjxp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-similar-right-triangles-by-mallory-cumpstone/sssssjxp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-similar-right-triangles-by-mallory-cumpstone/sssssjxp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-similar-right-triangles-by-mallory-cumpstone/sssssjxp"/>
      <lastmod>2026-11-02T17:49:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/maclaurin-series-for-sin/sssssjxw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maclaurin-series-for-sin/sssssjxw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maclaurin-series-for-sin/sssssjxw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maclaurin-series-for-sin/sssssjxw"/>
      <lastmod>2026-11-01T20:41:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/maclaurin-series-for-sin/sssssjxw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maclaurin-series-for-sin/sssssjxw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maclaurin-series-for-sin/sssssjxw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maclaurin-series-for-sin/sssssjxw"/>
      <lastmod>2026-11-01T20:41:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-function-graph-and-tangent-line/sssssjx6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-function-graph-and-tangent-line/sssssjx6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-function-graph-and-tangent-line/sssssjx6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-function-graph-and-tangent-line/sssssjx6"/>
      <lastmod>2026-11-02T15:04:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-function-graph-and-tangent-line/sssssjx6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-function-graph-and-tangent-line/sssssjx6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-function-graph-and-tangent-line/sssssjx6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-function-graph-and-tangent-line/sssssjx6"/>
      <lastmod>2026-11-02T15:04:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/algebraic-function-evaluation/sssssjxg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebraic-function-evaluation/sssssjxg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebraic-function-evaluation/sssssjxg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebraic-function-evaluation/sssssjxg"/>
      <lastmod>2026-11-01T21:16:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/algebraic-function-evaluation/sssssjxg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebraic-function-evaluation/sssssjxg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebraic-function-evaluation/sssssjxg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebraic-function-evaluation/sssssjxg"/>
      <lastmod>2026-11-01T21:16:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-a-right-triangle-by-martin-mcmulkin/sssssjx9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-right-triangle-by-martin-mcmulkin/sssssjx9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-right-triangle-by-martin-mcmulkin/sssssjx9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-right-triangle-by-martin-mcmulkin/sssssjx9"/>
      <lastmod>2026-11-01T19:14:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-a-right-triangle-by-martin-mcmulkin/sssssjx9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-right-triangle-by-martin-mcmulkin/sssssjx9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-right-triangle-by-martin-mcmulkin/sssssjx9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-right-triangle-by-martin-mcmulkin/sssssjx9"/>
      <lastmod>2026-11-01T19:14:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-triangle-law/sssssjxe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-triangle-law/sssssjxe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-triangle-law/sssssjxe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-triangle-law/sssssjxe"/>
      <lastmod>2026-11-02T03:20:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-triangle-law/sssssjxe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-triangle-law/sssssjxe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-triangle-law/sssssjxe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-triangle-law/sssssjxe"/>
      <lastmod>2026-11-02T03:20:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplication-of-directed-numbers-by-patrick-chung/sssssjxv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-of-directed-numbers-by-patrick-chung/sssssjxv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-of-directed-numbers-by-patrick-chung/sssssjxv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-of-directed-numbers-by-patrick-chung/sssssjxv"/>
      <lastmod>2026-11-01T20:57:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplication-of-directed-numbers-by-patrick-chung/sssssjxv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-of-directed-numbers-by-patrick-chung/sssssjxv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-of-directed-numbers-by-patrick-chung/sssssjxv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-of-directed-numbers-by-patrick-chung/sssssjxv"/>
      <lastmod>2026-11-01T20:57:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/homothety-symmetry-demonstration/sssssjx4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/homothety-symmetry-demonstration/sssssjx4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/homothety-symmetry-demonstration/sssssjx4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/homothety-symmetry-demonstration/sssssjx4"/>
      <lastmod>2026-11-02T03:03:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/homothety-symmetry-demonstration/sssssjx4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/homothety-symmetry-demonstration/sssssjx4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/homothety-symmetry-demonstration/sssssjx4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/homothety-symmetry-demonstration/sssssjx4"/>
      <lastmod>2026-11-02T03:03:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/math-art-colored-implicit-curves/sssssjxl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/math-art-colored-implicit-curves/sssssjxl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/math-art-colored-implicit-curves/sssssjxl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/math-art-colored-implicit-curves/sssssjxl"/>
      <lastmod>2026-11-01T21:30:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/math-art-colored-implicit-curves/sssssjxl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/math-art-colored-implicit-curves/sssssjxl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/math-art-colored-implicit-curves/sssssjxl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/math-art-colored-implicit-curves/sssssjxl"/>
      <lastmod>2026-11-01T21:30:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simple-fraction-multiplication/sssssjxy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-fraction-multiplication/sssssjxy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-fraction-multiplication/sssssjxy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-fraction-multiplication/sssssjxy"/>
      <lastmod>2026-11-02T09:35:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simple-fraction-multiplication/sssssjxy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-fraction-multiplication/sssssjxy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-fraction-multiplication/sssssjxy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-fraction-multiplication/sssssjxy"/>
      <lastmod>2026-11-02T09:35:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/f1-racing-track-geometry/sssssjxa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/f1-racing-track-geometry/sssssjxa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/f1-racing-track-geometry/sssssjxa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/f1-racing-track-geometry/sssssjxa"/>
      <lastmod>2026-11-02T17:10:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/f1-racing-track-geometry/sssssjxa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/f1-racing-track-geometry/sssssjxa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/f1-racing-track-geometry/sssssjxa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/f1-racing-track-geometry/sssssjxa"/>
      <lastmod>2026-11-02T17:10:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definite-integral-of-cos-x/sssssjxc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-of-cos-x/sssssjxc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-of-cos-x/sssssjxc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-of-cos-x/sssssjxc"/>
      <lastmod>2026-11-01T23:44:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definite-integral-of-cos-x/sssssjxc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-of-cos-x/sssssjxc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-of-cos-x/sssssjxc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-of-cos-x/sssssjxc"/>
      <lastmod>2026-11-01T23:44:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/navarra-selectividad-18-19-b2-problem/sssssjxr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/navarra-selectividad-18-19-b2-problem/sssssjxr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/navarra-selectividad-18-19-b2-problem/sssssjxr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/navarra-selectividad-18-19-b2-problem/sssssjxr"/>
      <lastmod>2026-11-01T21:55:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/navarra-selectividad-18-19-b2-problem/sssssjxr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/navarra-selectividad-18-19-b2-problem/sssssjxr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/navarra-selectividad-18-19-b2-problem/sssssjxr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/navarra-selectividad-18-19-b2-problem/sssssjxr"/>
      <lastmod>2026-11-01T21:55:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-by-chris-nord/sssssjxh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-by-chris-nord/sssssjxh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-by-chris-nord/sssssjxh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-by-chris-nord/sssssjxh"/>
      <lastmod>2026-11-01T20:52:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-by-chris-nord/sssssjxh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-by-chris-nord/sssssjxh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-by-chris-nord/sssssjxh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-by-chris-nord/sssssjxh"/>
      <lastmod>2026-11-01T20:52:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-alternate-interior-angles-v2/sssssjxt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-alternate-interior-angles-v2/sssssjxt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-alternate-interior-angles-v2/sssssjxt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-alternate-interior-angles-v2/sssssjxt"/>
      <lastmod>2026-11-01T23:20:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-alternate-interior-angles-v2/sssssjxt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-alternate-interior-angles-v2/sssssjxt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-alternate-interior-angles-v2/sssssjxt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-alternate-interior-angles-v2/sssssjxt"/>
      <lastmod>2026-11-01T23:20:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-cyclic-quadrilaterals/sssssjxx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-cyclic-quadrilaterals/sssssjxx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-cyclic-quadrilaterals/sssssjxx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-cyclic-quadrilaterals/sssssjxx"/>
      <lastmod>2026-11-02T16:31:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-cyclic-quadrilaterals/sssssjxx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-cyclic-quadrilaterals/sssssjxx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-cyclic-quadrilaterals/sssssjxx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-cyclic-quadrilaterals/sssssjxx"/>
      <lastmod>2026-11-02T16:31:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-construction-related-to-fermat-s-problem-maximum-task/sssssjxi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-construction-related-to-fermat-s-problem-maximum-task/sssssjxi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-construction-related-to-fermat-s-problem-maximum-task/sssssjxi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-construction-related-to-fermat-s-problem-maximum-task/sssssjxi"/>
      <lastmod>2026-11-01T23:37:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-construction-related-to-fermat-s-problem-maximum-task/sssssjxi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-construction-related-to-fermat-s-problem-maximum-task/sssssjxi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-construction-related-to-fermat-s-problem-maximum-task/sssssjxi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-construction-related-to-fermat-s-problem-maximum-task/sssssjxi"/>
      <lastmod>2026-11-01T23:37:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-revolution-by-lam-meng-hwee/sssssjxo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-by-lam-meng-hwee/sssssjxo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-by-lam-meng-hwee/sssssjxo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-by-lam-meng-hwee/sssssjxo"/>
      <lastmod>2026-11-02T02:23:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-revolution-by-lam-meng-hwee/sssssjxo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-by-lam-meng-hwee/sssssjxo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-by-lam-meng-hwee/sssssjxo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-by-lam-meng-hwee/sssssjxo"/>
      <lastmod>2026-11-02T02:23:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quiz-on-squares-of-numbers-25-75/sssssjis</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-on-squares-of-numbers-25-75/sssssjis"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-on-squares-of-numbers-25-75/sssssjis"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-on-squares-of-numbers-25-75/sssssjis"/>
      <lastmod>2026-11-02T13:36:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quiz-on-squares-of-numbers-25-75/sssssjis</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-on-squares-of-numbers-25-75/sssssjis"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-on-squares-of-numbers-25-75/sssssjis"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-on-squares-of-numbers-25-75/sssssjis"/>
      <lastmod>2026-11-02T13:36:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/what-is-congruence-aaa-by-cpl/sssssji7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/what-is-congruence-aaa-by-cpl/sssssji7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/what-is-congruence-aaa-by-cpl/sssssji7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/what-is-congruence-aaa-by-cpl/sssssji7"/>
      <lastmod>2026-11-01T23:28:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/what-is-congruence-aaa-by-cpl/sssssji7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/what-is-congruence-aaa-by-cpl/sssssji7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/what-is-congruence-aaa-by-cpl/sssssji7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/what-is-congruence-aaa-by-cpl/sssssji7"/>
      <lastmod>2026-11-01T23:28:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exact-area-calculation-example/sssssjin</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exact-area-calculation-example/sssssjin"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exact-area-calculation-example/sssssjin"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exact-area-calculation-example/sssssjin"/>
      <lastmod>2026-11-01T21:39:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exact-area-calculation-example/sssssjin</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exact-area-calculation-example/sssssjin"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exact-area-calculation-example/sssssjin"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exact-area-calculation-example/sssssjin"/>
      <lastmod>2026-11-01T21:39:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mean-median-mode-and-range/sssssji2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mean-median-mode-and-range/sssssji2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mean-median-mode-and-range/sssssji2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mean-median-mode-and-range/sssssji2"/>
      <lastmod>2026-11-01T23:09:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mean-median-mode-and-range/sssssji2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mean-median-mode-and-range/sssssji2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mean-median-mode-and-range/sssssji2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mean-median-mode-and-range/sssssji2"/>
      <lastmod>2026-11-01T23:09:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-demonstration-of-an-equilateral-triangle/sssssjik</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-an-equilateral-triangle/sssssjik"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-an-equilateral-triangle/sssssjik"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-an-equilateral-triangle/sssssjik"/>
      <lastmod>2026-11-02T17:41:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-demonstration-of-an-equilateral-triangle/sssssjik</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-an-equilateral-triangle/sssssjik"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-an-equilateral-triangle/sssssjik"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-an-equilateral-triangle/sssssjik"/>
      <lastmod>2026-11-02T17:41:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/direction-angle-illustrator-dynamic-vector-trigonometry-exploration/sssssjiz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/direction-angle-illustrator-dynamic-vector-trigonometry-exploration/sssssjiz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/direction-angle-illustrator-dynamic-vector-trigonometry-exploration/sssssjiz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/direction-angle-illustrator-dynamic-vector-trigonometry-exploration/sssssjiz"/>
      <lastmod>2026-11-02T09:18:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/direction-angle-illustrator-dynamic-vector-trigonometry-exploration/sssssjiz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/direction-angle-illustrator-dynamic-vector-trigonometry-exploration/sssssjiz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/direction-angle-illustrator-dynamic-vector-trigonometry-exploration/sssssjiz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/direction-angle-illustrator-dynamic-vector-trigonometry-exploration/sssssjiz"/>
      <lastmod>2026-11-02T09:18:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/compare-fractions-to-benchmarks/sssssji0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-fractions-to-benchmarks/sssssji0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-fractions-to-benchmarks/sssssji0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-fractions-to-benchmarks/sssssji0"/>
      <lastmod>2026-11-02T07:01:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/compare-fractions-to-benchmarks/sssssji0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-fractions-to-benchmarks/sssssji0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-fractions-to-benchmarks/sssssji0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-fractions-to-benchmarks/sssssji0"/>
      <lastmod>2026-11-02T07:01:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivatives-of-exponential-functions-by-janet-chen/sssssjid</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivatives-of-exponential-functions-by-janet-chen/sssssjid"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivatives-of-exponential-functions-by-janet-chen/sssssjid"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivatives-of-exponential-functions-by-janet-chen/sssssjid"/>
      <lastmod>2026-11-02T17:50:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivatives-of-exponential-functions-by-janet-chen/sssssjid</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivatives-of-exponential-functions-by-janet-chen/sssssjid"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivatives-of-exponential-functions-by-janet-chen/sssssjid"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivatives-of-exponential-functions-by-janet-chen/sssssjid"/>
      <lastmod>2026-11-02T17:50:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/product-of-linear-functions/sssssjif</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/product-of-linear-functions/sssssjif"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/product-of-linear-functions/sssssjif"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/product-of-linear-functions/sssssjif"/>
      <lastmod>2026-11-02T13:08:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/product-of-linear-functions/sssssjif</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/product-of-linear-functions/sssssjif"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/product-of-linear-functions/sssssjif"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/product-of-linear-functions/sssssjif"/>
      <lastmod>2026-11-02T13:08:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-properties/sssssji8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-properties/sssssji8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-properties/sssssji8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-properties/sssssji8"/>
      <lastmod>2026-11-02T16:34:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-properties/sssssji8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-properties/sssssji8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-properties/sssssji8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-properties/sssssji8"/>
      <lastmod>2026-11-02T16:34:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-explanation/sssssjiu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-explanation/sssssjiu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-explanation/sssssjiu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-explanation/sssssjiu"/>
      <lastmod>2026-11-01T23:52:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-explanation/sssssjiu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-explanation/sssssjiu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-explanation/sssssjiu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-explanation/sssssjiu"/>
      <lastmod>2026-11-01T23:52:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-construction-of-fermat-point-in-2d/sssssji5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-construction-of-fermat-point-in-2d/sssssji5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-construction-of-fermat-point-in-2d/sssssji5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-construction-of-fermat-point-in-2d/sssssji5"/>
      <lastmod>2026-11-01T23:42:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-construction-of-fermat-point-in-2d/sssssji5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-construction-of-fermat-point-in-2d/sssssji5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-construction-of-fermat-point-in-2d/sssssji5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-construction-of-fermat-point-in-2d/sssssji5"/>
      <lastmod>2026-11-01T23:42:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-translations-vector-based-triangle-transformation/sssssjib</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-translations-vector-based-triangle-transformation/sssssjib"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-translations-vector-based-triangle-transformation/sssssjib"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-translations-vector-based-triangle-transformation/sssssjib"/>
      <lastmod>2026-11-01T20:53:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-translations-vector-based-triangle-transformation/sssssjib</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-translations-vector-based-triangle-transformation/sssssjib"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-translations-vector-based-triangle-transformation/sssssjib"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-translations-vector-based-triangle-transformation/sssssjib"/>
      <lastmod>2026-11-01T20:53:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/saddle-surfaces/sssssji3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/saddle-surfaces/sssssji3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/saddle-surfaces/sssssji3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/saddle-surfaces/sssssji3"/>
      <lastmod>2026-11-02T02:50:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/saddle-surfaces/sssssji3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/saddle-surfaces/sssssji3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/saddle-surfaces/sssssji3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/saddle-surfaces/sssssji3"/>
      <lastmod>2026-11-02T02:50:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wallace-simson-line-deltoid-and-orthopole/sssssjiq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wallace-simson-line-deltoid-and-orthopole/sssssjiq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wallace-simson-line-deltoid-and-orthopole/sssssjiq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wallace-simson-line-deltoid-and-orthopole/sssssjiq"/>
      <lastmod>2026-11-02T16:51:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wallace-simson-line-deltoid-and-orthopole/sssssjiq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wallace-simson-line-deltoid-and-orthopole/sssssjiq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wallace-simson-line-deltoid-and-orthopole/sssssjiq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wallace-simson-line-deltoid-and-orthopole/sssssjiq"/>
      <lastmod>2026-11-02T16:51:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-and-surface-area-of-a-regular-pyramid/sssssji1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-and-surface-area-of-a-regular-pyramid/sssssji1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-and-surface-area-of-a-regular-pyramid/sssssji1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-and-surface-area-of-a-regular-pyramid/sssssji1"/>
      <lastmod>2026-11-01T23:23:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-and-surface-area-of-a-regular-pyramid/sssssji1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-and-surface-area-of-a-regular-pyramid/sssssji1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-and-surface-area-of-a-regular-pyramid/sssssji1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-and-surface-area-of-a-regular-pyramid/sssssji1"/>
      <lastmod>2026-11-01T23:23:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-a-rectangle/sssssjim</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-rectangle/sssssjim"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-rectangle/sssssjim"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-rectangle/sssssjim"/>
      <lastmod>2026-11-02T17:06:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-a-rectangle/sssssjim</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-rectangle/sssssjim"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-rectangle/sssssjim"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-rectangle/sssssjim"/>
      <lastmod>2026-11-02T17:06:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-function-by-betty-voon-wan-niu/sssssjij</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-function-by-betty-voon-wan-niu/sssssjij"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-function-by-betty-voon-wan-niu/sssssjij"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-function-by-betty-voon-wan-niu/sssssjij"/>
      <lastmod>2026-11-01T19:00:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-function-by-betty-voon-wan-niu/sssssjij</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-function-by-betty-voon-wan-niu/sssssjij"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-function-by-betty-voon-wan-niu/sssssjij"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-function-by-betty-voon-wan-niu/sssssjij"/>
      <lastmod>2026-11-01T19:00:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-derivatives-of-inverse-relationships/sssssjip</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-derivatives-of-inverse-relationships/sssssjip"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-derivatives-of-inverse-relationships/sssssjip"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-derivatives-of-inverse-relationships/sssssjip"/>
      <lastmod>2026-11-02T02:54:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-derivatives-of-inverse-relationships/sssssjip</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-derivatives-of-inverse-relationships/sssssjip"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-derivatives-of-inverse-relationships/sssssjip"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-derivatives-of-inverse-relationships/sssssjip"/>
      <lastmod>2026-11-02T02:54:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse/sssssjiw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse/sssssjiw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse/sssssjiw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse/sssssjiw"/>
      <lastmod>2026-11-01T22:08:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse/sssssjiw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse/sssssjiw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse/sssssjiw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse/sssssjiw"/>
      <lastmod>2026-11-01T22:08:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shape-1-rotations-and-reflections/sssssji6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shape-1-rotations-and-reflections/sssssji6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shape-1-rotations-and-reflections/sssssji6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shape-1-rotations-and-reflections/sssssji6"/>
      <lastmod>2026-11-02T11:03:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shape-1-rotations-and-reflections/sssssji6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shape-1-rotations-and-reflections/sssssji6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shape-1-rotations-and-reflections/sssssji6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shape-1-rotations-and-reflections/sssssji6"/>
      <lastmod>2026-11-02T11:03:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equilateral-triangle-construction-by-emeri-larsen/sssssjig</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equilateral-triangle-construction-by-emeri-larsen/sssssjig"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equilateral-triangle-construction-by-emeri-larsen/sssssjig"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equilateral-triangle-construction-by-emeri-larsen/sssssjig"/>
      <lastmod>2026-11-02T17:56:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equilateral-triangle-construction-by-emeri-larsen/sssssjig</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equilateral-triangle-construction-by-emeri-larsen/sssssjig"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equilateral-triangle-construction-by-emeri-larsen/sssssjig"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equilateral-triangle-construction-by-emeri-larsen/sssssjig"/>
      <lastmod>2026-11-02T17:56:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-bisector-construction-and-geometric-properties/sssssji9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-bisector-construction-and-geometric-properties/sssssji9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-bisector-construction-and-geometric-properties/sssssji9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-bisector-construction-and-geometric-properties/sssssji9"/>
      <lastmod>2026-11-02T09:19:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-bisector-construction-and-geometric-properties/sssssji9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-bisector-construction-and-geometric-properties/sssssji9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-bisector-construction-and-geometric-properties/sssssji9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-bisector-construction-and-geometric-properties/sssssji9"/>
      <lastmod>2026-11-02T09:19:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/concurrent-relationship-in-trapezoid-and-its-2-exircles/sssssjie</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/concurrent-relationship-in-trapezoid-and-its-2-exircles/sssssjie"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/concurrent-relationship-in-trapezoid-and-its-2-exircles/sssssjie"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/concurrent-relationship-in-trapezoid-and-its-2-exircles/sssssjie"/>
      <lastmod>2026-11-02T18:10:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/concurrent-relationship-in-trapezoid-and-its-2-exircles/sssssjie</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/concurrent-relationship-in-trapezoid-and-its-2-exircles/sssssjie"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/concurrent-relationship-in-trapezoid-and-its-2-exircles/sssssjie"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/concurrent-relationship-in-trapezoid-and-its-2-exircles/sssssjie"/>
      <lastmod>2026-11-02T18:10:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/data-table-probability-basic/sssssjiv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/data-table-probability-basic/sssssjiv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/data-table-probability-basic/sssssjiv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/data-table-probability-basic/sssssjiv"/>
      <lastmod>2026-11-02T00:53:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/data-table-probability-basic/sssssjiv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/data-table-probability-basic/sssssjiv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/data-table-probability-basic/sssssjiv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/data-table-probability-basic/sssssjiv"/>
      <lastmod>2026-11-02T00:53:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-number-and-derivative-geogebra-demonstration/sssssji4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-and-derivative-geogebra-demonstration/sssssji4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-and-derivative-geogebra-demonstration/sssssji4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-and-derivative-geogebra-demonstration/sssssji4"/>
      <lastmod>2026-11-01T23:13:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-number-and-derivative-geogebra-demonstration/sssssji4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-and-derivative-geogebra-demonstration/sssssji4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-and-derivative-geogebra-demonstration/sssssji4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-and-derivative-geogebra-demonstration/sssssji4"/>
      <lastmod>2026-11-01T23:13:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-root-pietro/sssssjil</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-pietro/sssssjil"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-pietro/sssssjil"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-pietro/sssssjil"/>
      <lastmod>2026-11-02T09:16:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-root-pietro/sssssjil</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-pietro/sssssjil"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-pietro/sssssjil"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-pietro/sssssjil"/>
      <lastmod>2026-11-02T09:16:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/poisson-approximation-to-binomial-distribution/sssssjiy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/poisson-approximation-to-binomial-distribution/sssssjiy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/poisson-approximation-to-binomial-distribution/sssssjiy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/poisson-approximation-to-binomial-distribution/sssssjiy"/>
      <lastmod>2026-11-02T16:37:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/poisson-approximation-to-binomial-distribution/sssssjiy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/poisson-approximation-to-binomial-distribution/sssssjiy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/poisson-approximation-to-binomial-distribution/sssssjiy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/poisson-approximation-to-binomial-distribution/sssssjiy"/>
      <lastmod>2026-11-02T16:37:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shape-of-ellipse/sssssjia</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shape-of-ellipse/sssssjia"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shape-of-ellipse/sssssjia"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shape-of-ellipse/sssssjia"/>
      <lastmod>2026-11-02T12:32:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shape-of-ellipse/sssssjia</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shape-of-ellipse/sssssjia"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shape-of-ellipse/sssssjia"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shape-of-ellipse/sssssjia"/>
      <lastmod>2026-11-02T12:32:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-a-parallelogram-with-geogebra-by-geogebra-team/sssssjic</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-parallelogram-with-geogebra-by-geogebra-team/sssssjic"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-parallelogram-with-geogebra-by-geogebra-team/sssssjic"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-parallelogram-with-geogebra-by-geogebra-team/sssssjic"/>
      <lastmod>2026-11-01T23:18:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-a-parallelogram-with-geogebra-by-geogebra-team/sssssjic</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-parallelogram-with-geogebra-by-geogebra-team/sssssjic"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-parallelogram-with-geogebra-by-geogebra-team/sssssjic"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-parallelogram-with-geogebra-by-geogebra-team/sssssjic"/>
      <lastmod>2026-11-01T23:18:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mix-up-shape-template/sssssjir</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mix-up-shape-template/sssssjir"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mix-up-shape-template/sssssjir"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mix-up-shape-template/sssssjir"/>
      <lastmod>2026-11-02T17:34:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mix-up-shape-template/sssssjir</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mix-up-shape-template/sssssjir"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mix-up-shape-template/sssssjir"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mix-up-shape-template/sssssjir"/>
      <lastmod>2026-11-02T17:34:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-new-and-old-mean-and-median/sssssjih</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-new-and-old-mean-and-median/sssssjih"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-new-and-old-mean-and-median/sssssjih"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-new-and-old-mean-and-median/sssssjih"/>
      <lastmod>2026-11-02T17:45:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-new-and-old-mean-and-median/sssssjih</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-new-and-old-mean-and-median/sssssjih"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-new-and-old-mean-and-median/sssssjih"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-new-and-old-mean-and-median/sssssjih"/>
      <lastmod>2026-11-02T17:45:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/confidence-interval-demo/sssssjit</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/confidence-interval-demo/sssssjit"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/confidence-interval-demo/sssssjit"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/confidence-interval-demo/sssssjit"/>
      <lastmod>2026-11-01T23:30:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/confidence-interval-demo/sssssjit</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/confidence-interval-demo/sssssjit"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/confidence-interval-demo/sssssjit"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/confidence-interval-demo/sssssjit"/>
      <lastmod>2026-11-01T23:30:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mondrian-cube/sssssjix</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mondrian-cube/sssssjix"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mondrian-cube/sssssjix"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mondrian-cube/sssssjix"/>
      <lastmod>2026-11-01T19:14:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mondrian-cube/sssssjix</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mondrian-cube/sssssjix"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mondrian-cube/sssssjix"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mondrian-cube/sssssjix"/>
      <lastmod>2026-11-01T19:14:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/max-bill-s-geometric-construction-by-mihaela-git/sssssjii</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/max-bill-s-geometric-construction-by-mihaela-git/sssssjii"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/max-bill-s-geometric-construction-by-mihaela-git/sssssjii"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/max-bill-s-geometric-construction-by-mihaela-git/sssssjii"/>
      <lastmod>2026-11-02T18:38:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/max-bill-s-geometric-construction-by-mihaela-git/sssssjii</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/max-bill-s-geometric-construction-by-mihaela-git/sssssjii"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/max-bill-s-geometric-construction-by-mihaela-git/sssssjii"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/max-bill-s-geometric-construction-by-mihaela-git/sssssjii"/>
      <lastmod>2026-11-02T18:38:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/writing-equations-for-lines-practice/sssssjio</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/writing-equations-for-lines-practice/sssssjio"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/writing-equations-for-lines-practice/sssssjio"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/writing-equations-for-lines-practice/sssssjio"/>
      <lastmod>2026-11-01T20:29:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/writing-equations-for-lines-practice/sssssjio</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/writing-equations-for-lines-practice/sssssjio"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/writing-equations-for-lines-practice/sssssjio"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/writing-equations-for-lines-practice/sssssjio"/>
      <lastmod>2026-11-01T20:29:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-example-weaver/sssssjos</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-example-weaver/sssssjos"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-example-weaver/sssssjos"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-example-weaver/sssssjos"/>
      <lastmod>2026-11-02T17:46:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-example-weaver/sssssjos</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-example-weaver/sssssjos"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-example-weaver/sssssjos"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-example-weaver/sssssjos"/>
      <lastmod>2026-11-02T17:46:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practice-calculating-slope/sssssjo7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-calculating-slope/sssssjo7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-calculating-slope/sssssjo7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-calculating-slope/sssssjo7"/>
      <lastmod>2026-11-01T23:01:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practice-calculating-slope/sssssjo7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-calculating-slope/sssssjo7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-calculating-slope/sssssjo7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-calculating-slope/sssssjo7"/>
      <lastmod>2026-11-01T23:01:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponentially-weighted-moving-average/sssssjon</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponentially-weighted-moving-average/sssssjon"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponentially-weighted-moving-average/sssssjon"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponentially-weighted-moving-average/sssssjon"/>
      <lastmod>2026-11-02T17:38:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponentially-weighted-moving-average/sssssjon</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponentially-weighted-moving-average/sssssjon"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponentially-weighted-moving-average/sssssjon"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponentially-weighted-moving-average/sssssjon"/>
      <lastmod>2026-11-02T17:38:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-dot-product-representation/sssssjo2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-dot-product-representation/sssssjo2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-dot-product-representation/sssssjo2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-dot-product-representation/sssssjo2"/>
      <lastmod>2026-11-02T14:48:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-dot-product-representation/sssssjo2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-dot-product-representation/sssssjo2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-dot-product-representation/sssssjo2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-dot-product-representation/sssssjo2"/>
      <lastmod>2026-11-02T14:48:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mode-of-a-probability-density-function/sssssjok</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mode-of-a-probability-density-function/sssssjok"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mode-of-a-probability-density-function/sssssjok"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mode-of-a-probability-density-function/sssssjok"/>
      <lastmod>2026-11-02T18:09:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mode-of-a-probability-density-function/sssssjok</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mode-of-a-probability-density-function/sssssjok"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mode-of-a-probability-density-function/sssssjok"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mode-of-a-probability-density-function/sssssjok"/>
      <lastmod>2026-11-02T18:09:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inside-out-hyperbola/sssssjoz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inside-out-hyperbola/sssssjoz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inside-out-hyperbola/sssssjoz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inside-out-hyperbola/sssssjoz"/>
      <lastmod>2026-11-02T17:53:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inside-out-hyperbola/sssssjoz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inside-out-hyperbola/sssssjoz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inside-out-hyperbola/sssssjoz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inside-out-hyperbola/sssssjoz"/>
      <lastmod>2026-11-02T17:53:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-demonstration-of-sine-transformations/sssssjo0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-sine-transformations/sssssjo0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demonstration-of-sine-transformations/sssssjo0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-sine-transformations/sssssjo0"/>
      <lastmod>2026-11-02T00:03:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-demonstration-of-sine-transformations/sssssjo0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-sine-transformations/sssssjo0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demonstration-of-sine-transformations/sssssjo0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-sine-transformations/sssssjo0"/>
      <lastmod>2026-11-02T00:03:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-illustration-of-a-circle-tangent-to-a-semicircle-and-its-diameter/sssssjod</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-a-circle-tangent-to-a-semicircle-and-its-diameter/sssssjod"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-a-circle-tangent-to-a-semicircle-and-its-diameter/sssssjod"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-a-circle-tangent-to-a-semicircle-and-its-diameter/sssssjod"/>
      <lastmod>2026-11-02T18:30:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-illustration-of-a-circle-tangent-to-a-semicircle-and-its-diameter/sssssjod</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-a-circle-tangent-to-a-semicircle-and-its-diameter/sssssjod"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-a-circle-tangent-to-a-semicircle-and-its-diameter/sssssjod"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-a-circle-tangent-to-a-semicircle-and-its-diameter/sssssjod"/>
      <lastmod>2026-11-02T18:30:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logo-of-factor-a-de-ficci-n/sssssjof</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logo-of-factor-a-de-ficci-n/sssssjof"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logo-of-factor-a-de-ficci-n/sssssjof"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logo-of-factor-a-de-ficci-n/sssssjof"/>
      <lastmod>2026-11-01T21:29:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logo-of-factor-a-de-ficci-n/sssssjof</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logo-of-factor-a-de-ficci-n/sssssjof"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logo-of-factor-a-de-ficci-n/sssssjof"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logo-of-factor-a-de-ficci-n/sssssjof"/>
      <lastmod>2026-11-01T21:29:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mei-further-math-matrices-assessment-q3-exploration/sssssjo8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mei-further-math-matrices-assessment-q3-exploration/sssssjo8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mei-further-math-matrices-assessment-q3-exploration/sssssjo8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mei-further-math-matrices-assessment-q3-exploration/sssssjo8"/>
      <lastmod>2026-11-02T02:57:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mei-further-math-matrices-assessment-q3-exploration/sssssjo8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mei-further-math-matrices-assessment-q3-exploration/sssssjo8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mei-further-math-matrices-assessment-q3-exploration/sssssjo8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mei-further-math-matrices-assessment-q3-exploration/sssssjo8"/>
      <lastmod>2026-11-02T02:57:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/understanding-square-roots-geometric-exploration-with-geogebra/sssssjou</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/understanding-square-roots-geometric-exploration-with-geogebra/sssssjou"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/understanding-square-roots-geometric-exploration-with-geogebra/sssssjou"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/understanding-square-roots-geometric-exploration-with-geogebra/sssssjou"/>
      <lastmod>2026-11-02T06:46:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/understanding-square-roots-geometric-exploration-with-geogebra/sssssjou</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/understanding-square-roots-geometric-exploration-with-geogebra/sssssjou"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/understanding-square-roots-geometric-exploration-with-geogebra/sssssjou"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/understanding-square-roots-geometric-exploration-with-geogebra/sssssjou"/>
      <lastmod>2026-11-02T06:46:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adjustable-angle-and-inclination-of-line-segment/sssssjo5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adjustable-angle-and-inclination-of-line-segment/sssssjo5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adjustable-angle-and-inclination-of-line-segment/sssssjo5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adjustable-angle-and-inclination-of-line-segment/sssssjo5"/>
      <lastmod>2026-11-01T19:21:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adjustable-angle-and-inclination-of-line-segment/sssssjo5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adjustable-angle-and-inclination-of-line-segment/sssssjo5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adjustable-angle-and-inclination-of-line-segment/sssssjo5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adjustable-angle-and-inclination-of-line-segment/sssssjo5"/>
      <lastmod>2026-11-01T19:21:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-cone-and-orthocenter-demonstration/sssssjob</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-cone-and-orthocenter-demonstration/sssssjob"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-cone-and-orthocenter-demonstration/sssssjob"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-cone-and-orthocenter-demonstration/sssssjob"/>
      <lastmod>2026-11-01T21:31:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-cone-and-orthocenter-demonstration/sssssjob</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-cone-and-orthocenter-demonstration/sssssjob"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-cone-and-orthocenter-demonstration/sssssjob"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-cone-and-orthocenter-demonstration/sssssjob"/>
      <lastmod>2026-11-01T21:31:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-subtraction-by-jennifer-north-morris/sssssjo3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-subtraction-by-jennifer-north-morris/sssssjo3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-subtraction-by-jennifer-north-morris/sssssjo3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-subtraction-by-jennifer-north-morris/sssssjo3"/>
      <lastmod>2026-11-02T17:03:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-subtraction-by-jennifer-north-morris/sssssjo3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-subtraction-by-jennifer-north-morris/sssssjo3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-subtraction-by-jennifer-north-morris/sssssjo3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-subtraction-by-jennifer-north-morris/sssssjo3"/>
      <lastmod>2026-11-02T17:03:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-equation-generator/sssssjoq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-equation-generator/sssssjoq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-equation-generator/sssssjoq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-equation-generator/sssssjoq"/>
      <lastmod>2026-11-02T09:10:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-equation-generator/sssssjoq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-equation-generator/sssssjoq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-equation-generator/sssssjoq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-equation-generator/sssssjoq"/>
      <lastmod>2026-11-02T09:10:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cosine-of-the-difference-of-two-angles/sssssjo1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-of-the-difference-of-two-angles/sssssjo1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-of-the-difference-of-two-angles/sssssjo1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-of-the-difference-of-two-angles/sssssjo1"/>
      <lastmod>2026-11-02T10:50:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cosine-of-the-difference-of-two-angles/sssssjo1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-of-the-difference-of-two-angles/sssssjo1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-of-the-difference-of-two-angles/sssssjo1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-of-the-difference-of-two-angles/sssssjo1"/>
      <lastmod>2026-11-02T10:50:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-cylinder-construction/sssssjom</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cylinder-construction/sssssjom"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cylinder-construction/sssssjom"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cylinder-construction/sssssjom"/>
      <lastmod>2026-11-02T17:15:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-cylinder-construction/sssssjom</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cylinder-construction/sssssjom"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cylinder-construction/sssssjom"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cylinder-construction/sssssjom"/>
      <lastmod>2026-11-02T17:15:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/product-rule/sssssjoj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/product-rule/sssssjoj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/product-rule/sssssjoj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/product-rule/sssssjoj"/>
      <lastmod>2026-11-01T23:39:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/product-rule/sssssjoj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/product-rule/sssssjoj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/product-rule/sssssjoj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/product-rule/sssssjoj"/>
      <lastmod>2026-11-01T23:39:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plastic-ratio-calipers/sssssjop</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plastic-ratio-calipers/sssssjop"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plastic-ratio-calipers/sssssjop"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plastic-ratio-calipers/sssssjop"/>
      <lastmod>2026-11-02T02:38:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plastic-ratio-calipers/sssssjop</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plastic-ratio-calipers/sssssjop"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plastic-ratio-calipers/sssssjop"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plastic-ratio-calipers/sssssjop"/>
      <lastmod>2026-11-02T02:38:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-data-averages-visualization/sssssjow</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-data-averages-visualization/sssssjow"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-data-averages-visualization/sssssjow"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-data-averages-visualization/sssssjow"/>
      <lastmod>2026-11-02T02:39:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-data-averages-visualization/sssssjow</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-data-averages-visualization/sssssjow"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-data-averages-visualization/sssssjow"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-data-averages-visualization/sssssjow"/>
      <lastmod>2026-11-02T02:39:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-quadrilateral-and-incircle-demonstration/sssssjo6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-quadrilateral-and-incircle-demonstration/sssssjo6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-quadrilateral-and-incircle-demonstration/sssssjo6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-quadrilateral-and-incircle-demonstration/sssssjo6"/>
      <lastmod>2026-11-02T18:03:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-quadrilateral-and-incircle-demonstration/sssssjo6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-quadrilateral-and-incircle-demonstration/sssssjo6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-quadrilateral-and-incircle-demonstration/sssssjo6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-quadrilateral-and-incircle-demonstration/sssssjo6"/>
      <lastmod>2026-11-02T18:03:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/regular-polygons-with-limits/sssssjog</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-polygons-with-limits/sssssjog"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-polygons-with-limits/sssssjog"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-polygons-with-limits/sssssjog"/>
      <lastmod>2026-11-02T02:30:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/regular-polygons-with-limits/sssssjog</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-polygons-with-limits/sssssjog"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-polygons-with-limits/sssssjog"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-polygons-with-limits/sssssjog"/>
      <lastmod>2026-11-02T02:30:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wave-example/sssssjo9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wave-example/sssssjo9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wave-example/sssssjo9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wave-example/sssssjo9"/>
      <lastmod>2026-11-02T09:27:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wave-example/sssssjo9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wave-example/sssssjo9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wave-example/sssssjo9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wave-example/sssssjo9"/>
      <lastmod>2026-11-02T09:27:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mode-on-different-lines/sssssjoe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mode-on-different-lines/sssssjoe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mode-on-different-lines/sssssjoe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mode-on-different-lines/sssssjoe"/>
      <lastmod>2026-11-02T18:48:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mode-on-different-lines/sssssjoe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mode-on-different-lines/sssssjoe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mode-on-different-lines/sssssjoe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mode-on-different-lines/sssssjoe"/>
      <lastmod>2026-11-02T18:48:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-parabola-exploration-random-parameters-and-integral-area-v-3/sssssjov</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-parabola-exploration-random-parameters-and-integral-area-v-3/sssssjov"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-parabola-exploration-random-parameters-and-integral-area-v-3/sssssjov"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-parabola-exploration-random-parameters-and-integral-area-v-3/sssssjov"/>
      <lastmod>2026-11-02T00:55:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-parabola-exploration-random-parameters-and-integral-area-v-3/sssssjov</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-parabola-exploration-random-parameters-and-integral-area-v-3/sssssjov"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-parabola-exploration-random-parameters-and-integral-area-v-3/sssssjov"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-parabola-exploration-random-parameters-and-integral-area-v-3/sssssjov"/>
      <lastmod>2026-11-02T00:55:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/collect-organise-summarise-data-exercise/sssssjo4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/collect-organise-summarise-data-exercise/sssssjo4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/collect-organise-summarise-data-exercise/sssssjo4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/collect-organise-summarise-data-exercise/sssssjo4"/>
      <lastmod>2026-11-01T21:59:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/collect-organise-summarise-data-exercise/sssssjo4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/collect-organise-summarise-data-exercise/sssssjo4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/collect-organise-summarise-data-exercise/sssssjo4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/collect-organise-summarise-data-exercise/sssssjo4"/>
      <lastmod>2026-11-01T21:59:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-activity-by-pj-yim/sssssjol</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-activity-by-pj-yim/sssssjol"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-activity-by-pj-yim/sssssjol"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-activity-by-pj-yim/sssssjol"/>
      <lastmod>2026-11-02T10:43:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-activity-by-pj-yim/sssssjol</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-activity-by-pj-yim/sssssjol"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-activity-by-pj-yim/sssssjol"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-activity-by-pj-yim/sssssjol"/>
      <lastmod>2026-11-02T10:43:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/random-terms-of-geometric-sequence/sssssjoy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-terms-of-geometric-sequence/sssssjoy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-terms-of-geometric-sequence/sssssjoy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-terms-of-geometric-sequence/sssssjoy"/>
      <lastmod>2026-11-02T17:42:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/random-terms-of-geometric-sequence/sssssjoy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-terms-of-geometric-sequence/sssssjoy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-terms-of-geometric-sequence/sssssjoy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-terms-of-geometric-sequence/sssssjoy"/>
      <lastmod>2026-11-02T17:42:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/chris-s-unit-circle/sssssjoa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chris-s-unit-circle/sssssjoa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chris-s-unit-circle/sssssjoa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chris-s-unit-circle/sssssjoa"/>
      <lastmod>2026-11-02T00:25:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/chris-s-unit-circle/sssssjoa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chris-s-unit-circle/sssssjoa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chris-s-unit-circle/sssssjoa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chris-s-unit-circle/sssssjoa"/>
      <lastmod>2026-11-02T00:25:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/making-perpendicular-bisectors-beginner-exercise-9/sssssjoc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-perpendicular-bisectors-beginner-exercise-9/sssssjoc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-perpendicular-bisectors-beginner-exercise-9/sssssjoc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-perpendicular-bisectors-beginner-exercise-9/sssssjoc"/>
      <lastmod>2026-11-02T18:35:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/making-perpendicular-bisectors-beginner-exercise-9/sssssjoc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-perpendicular-bisectors-beginner-exercise-9/sssssjoc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-perpendicular-bisectors-beginner-exercise-9/sssssjoc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-perpendicular-bisectors-beginner-exercise-9/sssssjoc"/>
      <lastmod>2026-11-02T18:35:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sections-of-a-cube-by-sander-kesteloot/sssssjor</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-a-cube-by-sander-kesteloot/sssssjor"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-a-cube-by-sander-kesteloot/sssssjor"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-a-cube-by-sander-kesteloot/sssssjor"/>
      <lastmod>2026-11-02T06:52:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sections-of-a-cube-by-sander-kesteloot/sssssjor</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-a-cube-by-sander-kesteloot/sssssjor"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-a-cube-by-sander-kesteloot/sssssjor"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-a-cube-by-sander-kesteloot/sssssjor"/>
      <lastmod>2026-11-02T06:52:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-a-trapezium/sssssjoh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-trapezium/sssssjoh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-trapezium/sssssjoh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-trapezium/sssssjoh"/>
      <lastmod>2026-11-01T23:38:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-a-trapezium/sssssjoh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-trapezium/sssssjoh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-trapezium/sssssjoh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-trapezium/sssssjoh"/>
      <lastmod>2026-11-01T23:38:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-activity/sssssjot</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-activity/sssssjot"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-activity/sssssjot"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-activity/sssssjot"/>
      <lastmod>2026-11-02T06:10:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-activity/sssssjot</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-activity/sssssjot"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-activity/sssssjot"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-activity/sssssjot"/>
      <lastmod>2026-11-02T06:10:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/h2m-2019-paper-1-question-9/sssssjox</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/h2m-2019-paper-1-question-9/sssssjox"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/h2m-2019-paper-1-question-9/sssssjox"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/h2m-2019-paper-1-question-9/sssssjox"/>
      <lastmod>2026-11-01T20:40:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/h2m-2019-paper-1-question-9/sssssjox</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/h2m-2019-paper-1-question-9/sssssjox"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/h2m-2019-paper-1-question-9/sssssjox"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/h2m-2019-paper-1-question-9/sssssjox"/>
      <lastmod>2026-11-01T20:40:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/basketball-projectile-motion/sssssjoi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basketball-projectile-motion/sssssjoi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basketball-projectile-motion/sssssjoi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basketball-projectile-motion/sssssjoi"/>
      <lastmod>2026-11-02T18:35:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/basketball-projectile-motion/sssssjoi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basketball-projectile-motion/sssssjoi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basketball-projectile-motion/sssssjoi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basketball-projectile-motion/sssssjoi"/>
      <lastmod>2026-11-02T18:35:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/scalar-multiples-of-vectors/sssssjoo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scalar-multiples-of-vectors/sssssjoo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scalar-multiples-of-vectors/sssssjoo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scalar-multiples-of-vectors/sssssjoo"/>
      <lastmod>2026-11-02T18:17:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/scalar-multiples-of-vectors/sssssjoo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scalar-multiples-of-vectors/sssssjoo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scalar-multiples-of-vectors/sssssjoo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scalar-multiples-of-vectors/sssssjoo"/>
      <lastmod>2026-11-02T18:17:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformation-demo-by-brad-findell/ssssspss</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformation-demo-by-brad-findell/ssssspss"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformation-demo-by-brad-findell/ssssspss"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformation-demo-by-brad-findell/ssssspss"/>
      <lastmod>2026-11-02T02:20:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformation-demo-by-brad-findell/ssssspss</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformation-demo-by-brad-findell/ssssspss"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformation-demo-by-brad-findell/ssssspss"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformation-demo-by-brad-findell/ssssspss"/>
      <lastmod>2026-11-02T02:20:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/direction-cosines-of-a-line/sssssps7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/direction-cosines-of-a-line/sssssps7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/direction-cosines-of-a-line/sssssps7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/direction-cosines-of-a-line/sssssps7"/>
      <lastmod>2026-11-01T23:34:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/direction-cosines-of-a-line/sssssps7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/direction-cosines-of-a-line/sssssps7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/direction-cosines-of-a-line/sssssps7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/direction-cosines-of-a-line/sssssps7"/>
      <lastmod>2026-11-01T23:34:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/annulus-area-dissection-demo/ssssspsn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/annulus-area-dissection-demo/ssssspsn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/annulus-area-dissection-demo/ssssspsn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/annulus-area-dissection-demo/ssssspsn"/>
      <lastmod>2026-11-01T21:32:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/annulus-area-dissection-demo/ssssspsn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/annulus-area-dissection-demo/ssssspsn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/annulus-area-dissection-demo/ssssspsn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/annulus-area-dissection-demo/ssssspsn"/>
      <lastmod>2026-11-01T21:32:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-inequalities-by-casey-riggs/sssssps2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-inequalities-by-casey-riggs/sssssps2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-inequalities-by-casey-riggs/sssssps2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-inequalities-by-casey-riggs/sssssps2"/>
      <lastmod>2026-11-02T17:58:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-inequalities-by-casey-riggs/sssssps2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-inequalities-by-casey-riggs/sssssps2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-inequalities-by-casey-riggs/sssssps2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-inequalities-by-casey-riggs/sssssps2"/>
      <lastmod>2026-11-02T17:58:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/copy-a-line-segment-by-se-oralexcontreras/ssssspsk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copy-a-line-segment-by-se-oralexcontreras/ssssspsk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copy-a-line-segment-by-se-oralexcontreras/ssssspsk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copy-a-line-segment-by-se-oralexcontreras/ssssspsk"/>
      <lastmod>2026-11-02T18:52:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/copy-a-line-segment-by-se-oralexcontreras/ssssspsk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copy-a-line-segment-by-se-oralexcontreras/ssssspsk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copy-a-line-segment-by-se-oralexcontreras/ssssspsk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copy-a-line-segment-by-se-oralexcontreras/ssssspsk"/>
      <lastmod>2026-11-02T18:52:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/converting-rational-numbers-to-fractions/ssssspsz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/converting-rational-numbers-to-fractions/ssssspsz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/converting-rational-numbers-to-fractions/ssssspsz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/converting-rational-numbers-to-fractions/ssssspsz"/>
      <lastmod>2026-11-02T15:00:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/converting-rational-numbers-to-fractions/ssssspsz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/converting-rational-numbers-to-fractions/ssssspsz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/converting-rational-numbers-to-fractions/ssssspsz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/converting-rational-numbers-to-fractions/ssssspsz"/>
      <lastmod>2026-11-02T15:00:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-mandala/sssssps0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-mandala/sssssps0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-mandala/sssssps0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-mandala/sssssps0"/>
      <lastmod>2026-11-02T16:37:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-mandala/sssssps0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-mandala/sssssps0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-mandala/sssssps0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-mandala/sssssps0"/>
      <lastmod>2026-11-02T16:37:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-foci-and-locus-demonstration/ssssspsd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-foci-and-locus-demonstration/ssssspsd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-foci-and-locus-demonstration/ssssspsd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-foci-and-locus-demonstration/ssssspsd"/>
      <lastmod>2026-11-02T16:44:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-foci-and-locus-demonstration/ssssspsd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-foci-and-locus-demonstration/ssssspsd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-foci-and-locus-demonstration/ssssspsd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-foci-and-locus-demonstration/ssssspsd"/>
      <lastmod>2026-11-02T16:44:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sss-exploration/ssssspsf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-exploration/ssssspsf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-exploration/ssssspsf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-exploration/ssssspsf"/>
      <lastmod>2026-11-02T16:30:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sss-exploration/ssssspsf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-exploration/ssssspsf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-exploration/ssssspsf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-exploration/ssssspsf"/>
      <lastmod>2026-11-02T16:30:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cimat-logo-geometric-construction-with-vectors-transformations-and-functions/sssssps8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cimat-logo-geometric-construction-with-vectors-transformations-and-functions/sssssps8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cimat-logo-geometric-construction-with-vectors-transformations-and-functions/sssssps8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cimat-logo-geometric-construction-with-vectors-transformations-and-functions/sssssps8"/>
      <lastmod>2026-11-02T02:17:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cimat-logo-geometric-construction-with-vectors-transformations-and-functions/sssssps8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cimat-logo-geometric-construction-with-vectors-transformations-and-functions/sssssps8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cimat-logo-geometric-construction-with-vectors-transformations-and-functions/sssssps8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cimat-logo-geometric-construction-with-vectors-transformations-and-functions/sssssps8"/>
      <lastmod>2026-11-02T02:17:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-volume-vs-base-area-demo/ssssspsu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-volume-vs-base-area-demo/ssssspsu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-volume-vs-base-area-demo/ssssspsu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-volume-vs-base-area-demo/ssssspsu"/>
      <lastmod>2026-11-02T14:58:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-volume-vs-base-area-demo/ssssspsu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-volume-vs-base-area-demo/ssssspsu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-volume-vs-base-area-demo/ssssspsu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-volume-vs-base-area-demo/ssssspsu"/>
      <lastmod>2026-11-02T14:58:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-demonstration-by-ezra/sssssps5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-demonstration-by-ezra/sssssps5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-demonstration-by-ezra/sssssps5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-demonstration-by-ezra/sssssps5"/>
      <lastmod>2026-11-02T18:22:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-demonstration-by-ezra/sssssps5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-demonstration-by-ezra/sssssps5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-demonstration-by-ezra/sssssps5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-demonstration-by-ezra/sssssps5"/>
      <lastmod>2026-11-02T18:22:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/anchoring-units-of-measurement-example/ssssspsb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/anchoring-units-of-measurement-example/ssssspsb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/anchoring-units-of-measurement-example/ssssspsb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/anchoring-units-of-measurement-example/ssssspsb"/>
      <lastmod>2026-11-02T02:14:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/anchoring-units-of-measurement-example/ssssspsb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/anchoring-units-of-measurement-example/ssssspsb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/anchoring-units-of-measurement-example/ssssspsb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/anchoring-units-of-measurement-example/ssssspsb"/>
      <lastmod>2026-11-02T02:14:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-cylinder-volume-calculation/sssssps3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cylinder-volume-calculation/sssssps3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cylinder-volume-calculation/sssssps3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cylinder-volume-calculation/sssssps3"/>
      <lastmod>2026-11-01T23:53:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-cylinder-volume-calculation/sssssps3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cylinder-volume-calculation/sssssps3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cylinder-volume-calculation/sssssps3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cylinder-volume-calculation/sssssps3"/>
      <lastmod>2026-11-01T23:53:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/making-right-angled-triangles-isometric-grid/ssssspsq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-right-angled-triangles-isometric-grid/ssssspsq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-right-angled-triangles-isometric-grid/ssssspsq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-right-angled-triangles-isometric-grid/ssssspsq"/>
      <lastmod>2026-11-01T21:08:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/making-right-angled-triangles-isometric-grid/ssssspsq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-right-angled-triangles-isometric-grid/ssssspsq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-right-angled-triangles-isometric-grid/ssssspsq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-right-angled-triangles-isometric-grid/ssssspsq"/>
      <lastmod>2026-11-01T21:08:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-confidence-interval-interactive-demo/sssssps1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-confidence-interval-interactive-demo/sssssps1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-confidence-interval-interactive-demo/sssssps1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-confidence-interval-interactive-demo/sssssps1"/>
      <lastmod>2026-11-02T13:14:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-confidence-interval-interactive-demo/sssssps1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-confidence-interval-interactive-demo/sssssps1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-confidence-interval-interactive-demo/sssssps1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-confidence-interval-interactive-demo/sssssps1"/>
      <lastmod>2026-11-02T13:14:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-curves-wrapping-functions-around-the-pole/ssssspsm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-curves-wrapping-functions-around-the-pole/ssssspsm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-curves-wrapping-functions-around-the-pole/ssssspsm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-curves-wrapping-functions-around-the-pole/ssssspsm"/>
      <lastmod>2026-11-01T23:48:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-curves-wrapping-functions-around-the-pole/ssssspsm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-curves-wrapping-functions-around-the-pole/ssssspsm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-curves-wrapping-functions-around-the-pole/ssssspsm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-curves-wrapping-functions-around-the-pole/ssssspsm"/>
      <lastmod>2026-11-01T23:48:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-a-rhombus/ssssspsj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-rhombus/ssssspsj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-rhombus/ssssspsj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-rhombus/ssssspsj"/>
      <lastmod>2026-11-02T12:08:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-a-rhombus/ssssspsj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-rhombus/ssssspsj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-rhombus/ssssspsj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-rhombus/ssssspsj"/>
      <lastmod>2026-11-02T12:08:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proving-triangles-similar-2-aps/ssssspsp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proving-triangles-similar-2-aps/ssssspsp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proving-triangles-similar-2-aps/ssssspsp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proving-triangles-similar-2-aps/ssssspsp"/>
      <lastmod>2026-11-02T00:20:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proving-triangles-similar-2-aps/ssssspsp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proving-triangles-similar-2-aps/ssssspsp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proving-triangles-similar-2-aps/ssssspsp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proving-triangles-similar-2-aps/ssssspsp"/>
      <lastmod>2026-11-02T00:20:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-a-cone-as-the-limit-of-sum-of-volumes-of-cylinders/ssssspsw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-cone-as-the-limit-of-sum-of-volumes-of-cylinders/ssssspsw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-cone-as-the-limit-of-sum-of-volumes-of-cylinders/ssssspsw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-cone-as-the-limit-of-sum-of-volumes-of-cylinders/ssssspsw"/>
      <lastmod>2026-11-02T16:49:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-a-cone-as-the-limit-of-sum-of-volumes-of-cylinders/ssssspsw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-cone-as-the-limit-of-sum-of-volumes-of-cylinders/ssssspsw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-cone-as-the-limit-of-sum-of-volumes-of-cylinders/ssssspsw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-cone-as-the-limit-of-sum-of-volumes-of-cylinders/ssssspsw"/>
      <lastmod>2026-11-02T16:49:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/model-the-golden-gate-bridge/sssssps6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/model-the-golden-gate-bridge/sssssps6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/model-the-golden-gate-bridge/sssssps6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/model-the-golden-gate-bridge/sssssps6"/>
      <lastmod>2026-11-02T12:50:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/model-the-golden-gate-bridge/sssssps6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/model-the-golden-gate-bridge/sssssps6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/model-the-golden-gate-bridge/sssssps6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/model-the-golden-gate-bridge/sssssps6"/>
      <lastmod>2026-11-02T12:50:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sections-of-a-triangular-prism/ssssspsg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-a-triangular-prism/ssssspsg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-a-triangular-prism/ssssspsg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-a-triangular-prism/ssssspsg"/>
      <lastmod>2026-11-02T06:14:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sections-of-a-triangular-prism/ssssspsg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-a-triangular-prism/ssssspsg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-a-triangular-prism/ssssspsg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-a-triangular-prism/ssssspsg"/>
      <lastmod>2026-11-02T06:14:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangles-with-same-perimeter/sssssps9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangles-with-same-perimeter/sssssps9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangles-with-same-perimeter/sssssps9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangles-with-same-perimeter/sssssps9"/>
      <lastmod>2026-11-02T18:24:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangles-with-same-perimeter/sssssps9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangles-with-same-perimeter/sssssps9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangles-with-same-perimeter/sssssps9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangles-with-same-perimeter/sssssps9"/>
      <lastmod>2026-11-02T18:24:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotational-symmetry-demo-by-adam-normand/ssssspse</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-demo-by-adam-normand/ssssspse"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-demo-by-adam-normand/ssssspse"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-demo-by-adam-normand/ssssspse"/>
      <lastmod>2026-11-02T09:13:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotational-symmetry-demo-by-adam-normand/ssssspse</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-demo-by-adam-normand/ssssspse"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-demo-by-adam-normand/ssssspse"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-demo-by-adam-normand/ssssspse"/>
      <lastmod>2026-11-02T09:13:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-surface-area-by-c-redfearn/ssssspsv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-surface-area-by-c-redfearn/ssssspsv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-surface-area-by-c-redfearn/ssssspsv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-surface-area-by-c-redfearn/ssssspsv"/>
      <lastmod>2026-11-02T18:14:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-surface-area-by-c-redfearn/ssssspsv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-surface-area-by-c-redfearn/ssssspsv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-surface-area-by-c-redfearn/ssssspsv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-surface-area-by-c-redfearn/ssssspsv"/>
      <lastmod>2026-11-02T18:14:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/floyd-dilations-5/sssssps4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/floyd-dilations-5/sssssps4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/floyd-dilations-5/sssssps4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/floyd-dilations-5/sssssps4"/>
      <lastmod>2026-11-02T03:20:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/floyd-dilations-5/sssssps4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/floyd-dilations-5/sssssps4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/floyd-dilations-5/sssssps4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/floyd-dilations-5/sssssps4"/>
      <lastmod>2026-11-02T03:20:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complementary-angles-dynamic-exploration/ssssspsl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complementary-angles-dynamic-exploration/ssssspsl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complementary-angles-dynamic-exploration/ssssspsl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complementary-angles-dynamic-exploration/ssssspsl"/>
      <lastmod>2026-11-01T21:03:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complementary-angles-dynamic-exploration/ssssspsl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complementary-angles-dynamic-exploration/ssssspsl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complementary-angles-dynamic-exploration/ssssspsl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complementary-angles-dynamic-exploration/ssssspsl"/>
      <lastmod>2026-11-01T21:03:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-combinations-of-vectors-using-a-triangle/ssssspsy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-combinations-of-vectors-using-a-triangle/ssssspsy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-combinations-of-vectors-using-a-triangle/ssssspsy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-combinations-of-vectors-using-a-triangle/ssssspsy"/>
      <lastmod>2026-11-02T18:02:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-combinations-of-vectors-using-a-triangle/ssssspsy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-combinations-of-vectors-using-a-triangle/ssssspsy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-combinations-of-vectors-using-a-triangle/ssssspsy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-combinations-of-vectors-using-a-triangle/ssssspsy"/>
      <lastmod>2026-11-02T18:02:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/limits-of-function-compositions/ssssspsa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-of-function-compositions/ssssspsa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-of-function-compositions/ssssspsa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-of-function-compositions/ssssspsa"/>
      <lastmod>2026-11-02T17:42:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/limits-of-function-compositions/ssssspsa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-of-function-compositions/ssssspsa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-of-function-compositions/ssssspsa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-of-function-compositions/ssssspsa"/>
      <lastmod>2026-11-02T17:42:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-volume-demonstration/ssssspsc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-volume-demonstration/ssssspsc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-volume-demonstration/ssssspsc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-volume-demonstration/ssssspsc"/>
      <lastmod>2026-11-02T00:37:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-volume-demonstration/ssssspsc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-volume-demonstration/ssssspsc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-volume-demonstration/ssssspsc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-volume-demonstration/ssssspsc"/>
      <lastmod>2026-11-02T00:37:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplicity-of-roots/ssssspsr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplicity-of-roots/ssssspsr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplicity-of-roots/ssssspsr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplicity-of-roots/ssssspsr"/>
      <lastmod>2026-11-02T18:51:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplicity-of-roots/ssssspsr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplicity-of-roots/ssssspsr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplicity-of-roots/ssssspsr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplicity-of-roots/ssssspsr"/>
      <lastmod>2026-11-02T18:51:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-measures-of-center/ssssspsh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-measures-of-center/ssssspsh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-measures-of-center/ssssspsh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-measures-of-center/ssssspsh"/>
      <lastmod>2026-11-01T23:51:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-measures-of-center/ssssspsh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-measures-of-center/ssssspsh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-measures-of-center/ssssspsh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-measures-of-center/ssssspsh"/>
      <lastmod>2026-11-01T23:51:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-addition-subtraction-multiplication-and-division/ssssspst</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-addition-subtraction-multiplication-and-division/ssssspst"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-addition-subtraction-multiplication-and-division/ssssspst"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-addition-subtraction-multiplication-and-division/ssssspst"/>
      <lastmod>2026-11-02T17:00:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-addition-subtraction-multiplication-and-division/ssssspst</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-addition-subtraction-multiplication-and-division/ssssspst"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-addition-subtraction-multiplication-and-division/ssssspst"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-addition-subtraction-multiplication-and-division/ssssspst"/>
      <lastmod>2026-11-02T17:00:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construct-a-triangle-with-given-area-quick-formative-assessment/ssssspsx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-a-triangle-with-given-area-quick-formative-assessment/ssssspsx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-a-triangle-with-given-area-quick-formative-assessment/ssssspsx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-a-triangle-with-given-area-quick-formative-assessment/ssssspsx"/>
      <lastmod>2026-11-02T02:43:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construct-a-triangle-with-given-area-quick-formative-assessment/ssssspsx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-a-triangle-with-given-area-quick-formative-assessment/ssssspsx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-a-triangle-with-given-area-quick-formative-assessment/ssssspsx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-a-triangle-with-given-area-quick-formative-assessment/ssssspsx"/>
      <lastmod>2026-11-02T02:43:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-example-functions-statistics-and-geometric-transformations/ssssspsi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-example-functions-statistics-and-geometric-transformations/ssssspsi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-example-functions-statistics-and-geometric-transformations/ssssspsi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-example-functions-statistics-and-geometric-transformations/ssssspsi"/>
      <lastmod>2026-11-01T21:41:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-example-functions-statistics-and-geometric-transformations/ssssspsi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-example-functions-statistics-and-geometric-transformations/ssssspsi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-example-functions-statistics-and-geometric-transformations/ssssspsi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-example-functions-statistics-and-geometric-transformations/ssssspsi"/>
      <lastmod>2026-11-01T21:41:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/random-slope-line-drawing-quiz-by-andreas-trappmair/ssssspso</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-slope-line-drawing-quiz-by-andreas-trappmair/ssssspso"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-slope-line-drawing-quiz-by-andreas-trappmair/ssssspso"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-slope-line-drawing-quiz-by-andreas-trappmair/ssssspso"/>
      <lastmod>2026-11-01T23:40:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/random-slope-line-drawing-quiz-by-andreas-trappmair/ssssspso</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-slope-line-drawing-quiz-by-andreas-trappmair/ssssspso"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-slope-line-drawing-quiz-by-andreas-trappmair/ssssspso"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-slope-line-drawing-quiz-by-andreas-trappmair/ssssspso"/>
      <lastmod>2026-11-01T23:40:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-the-n-th-tetrahedral-number/sssssp7s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-n-th-tetrahedral-number/sssssp7s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-n-th-tetrahedral-number/sssssp7s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-n-th-tetrahedral-number/sssssp7s"/>
      <lastmod>2026-11-01T20:59:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-the-n-th-tetrahedral-number/sssssp7s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-n-th-tetrahedral-number/sssssp7s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-n-th-tetrahedral-number/sssssp7s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-n-th-tetrahedral-number/sssssp7s"/>
      <lastmod>2026-11-01T20:59:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polynomial-division-quiz/sssssp77</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-division-quiz/sssssp77"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-division-quiz/sssssp77"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-division-quiz/sssssp77"/>
      <lastmod>2026-11-02T17:18:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polynomial-division-quiz/sssssp77</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-division-quiz/sssssp77"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-division-quiz/sssssp77"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-division-quiz/sssssp77"/>
      <lastmod>2026-11-02T17:18:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-example-test-quality-and-mathematical-function-demonstration/sssssp7n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-example-test-quality-and-mathematical-function-demonstration/sssssp7n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-example-test-quality-and-mathematical-function-demonstration/sssssp7n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-example-test-quality-and-mathematical-function-demonstration/sssssp7n"/>
      <lastmod>2026-11-02T00:01:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-example-test-quality-and-mathematical-function-demonstration/sssssp7n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-example-test-quality-and-mathematical-function-demonstration/sssssp7n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-example-test-quality-and-mathematical-function-demonstration/sssssp7n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-example-test-quality-and-mathematical-function-demonstration/sssssp7n"/>
      <lastmod>2026-11-02T00:01:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-a-rhombus-by-ibrahim-el-hage/sssssp72</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-rhombus-by-ibrahim-el-hage/sssssp72"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-rhombus-by-ibrahim-el-hage/sssssp72"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-rhombus-by-ibrahim-el-hage/sssssp72"/>
      <lastmod>2026-11-02T13:35:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-a-rhombus-by-ibrahim-el-hage/sssssp72</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-rhombus-by-ibrahim-el-hage/sssssp72"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-rhombus-by-ibrahim-el-hage/sssssp72"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-rhombus-by-ibrahim-el-hage/sssssp72"/>
      <lastmod>2026-11-02T13:35:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-prism-problem/sssssp7k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-prism-problem/sssssp7k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-prism-problem/sssssp7k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-prism-problem/sssssp7k"/>
      <lastmod>2026-11-02T18:10:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-prism-problem/sssssp7k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-prism-problem/sssssp7k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-prism-problem/sssssp7k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-prism-problem/sssssp7k"/>
      <lastmod>2026-11-02T18:10:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/frequency-and-relative-frequency-distributions/sssssp7z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/frequency-and-relative-frequency-distributions/sssssp7z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/frequency-and-relative-frequency-distributions/sssssp7z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/frequency-and-relative-frequency-distributions/sssssp7z"/>
      <lastmod>2026-11-01T20:49:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/frequency-and-relative-frequency-distributions/sssssp7z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/frequency-and-relative-frequency-distributions/sssssp7z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/frequency-and-relative-frequency-distributions/sssssp7z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/frequency-and-relative-frequency-distributions/sssssp7z"/>
      <lastmod>2026-11-01T20:49:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/math-and-clothes-the-jacquard-loom/sssssp70</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/math-and-clothes-the-jacquard-loom/sssssp70"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/math-and-clothes-the-jacquard-loom/sssssp70"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/math-and-clothes-the-jacquard-loom/sssssp70"/>
      <lastmod>2026-11-01T19:16:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/math-and-clothes-the-jacquard-loom/sssssp70</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/math-and-clothes-the-jacquard-loom/sssssp70"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/math-and-clothes-the-jacquard-loom/sssssp70"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/math-and-clothes-the-jacquard-loom/sssssp70"/>
      <lastmod>2026-11-01T19:16:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/temperature-vs-time-simulation/sssssp7d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temperature-vs-time-simulation/sssssp7d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temperature-vs-time-simulation/sssssp7d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temperature-vs-time-simulation/sssssp7d"/>
      <lastmod>2026-11-02T03:15:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/temperature-vs-time-simulation/sssssp7d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temperature-vs-time-simulation/sssssp7d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temperature-vs-time-simulation/sssssp7d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temperature-vs-time-simulation/sssssp7d"/>
      <lastmod>2026-11-02T03:15:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponent-repeated-multiplication-or-division/sssssp7f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-repeated-multiplication-or-division/sssssp7f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-repeated-multiplication-or-division/sssssp7f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-repeated-multiplication-or-division/sssssp7f"/>
      <lastmod>2026-11-02T18:18:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponent-repeated-multiplication-or-division/sssssp7f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-repeated-multiplication-or-division/sssssp7f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-repeated-multiplication-or-division/sssssp7f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-repeated-multiplication-or-division/sssssp7f"/>
      <lastmod>2026-11-02T18:18:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/double-knot-on-a-torus/sssssp78</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-knot-on-a-torus/sssssp78"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-knot-on-a-torus/sssssp78"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-knot-on-a-torus/sssssp78"/>
      <lastmod>2026-11-02T03:20:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/double-knot-on-a-torus/sssssp78</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-knot-on-a-torus/sssssp78"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-knot-on-a-torus/sssssp78"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-knot-on-a-torus/sssssp78"/>
      <lastmod>2026-11-02T03:20:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/center-of-gravity-and-stability-animation/sssssp7u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/center-of-gravity-and-stability-animation/sssssp7u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/center-of-gravity-and-stability-animation/sssssp7u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/center-of-gravity-and-stability-animation/sssssp7u"/>
      <lastmod>2026-11-01T23:31:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/center-of-gravity-and-stability-animation/sssssp7u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/center-of-gravity-and-stability-animation/sssssp7u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/center-of-gravity-and-stability-animation/sssssp7u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/center-of-gravity-and-stability-animation/sssssp7u"/>
      <lastmod>2026-11-01T23:31:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vectors-introduction/sssssp75</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-introduction/sssssp75"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-introduction/sssssp75"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-introduction/sssssp75"/>
      <lastmod>2026-11-02T00:36:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vectors-introduction/sssssp75</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-introduction/sssssp75"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-introduction/sssssp75"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-introduction/sssssp75"/>
      <lastmod>2026-11-02T00:36:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/phantom-graph-y-2-x-x-3-2-example/sssssp7b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-y-2-x-x-3-2-example/sssssp7b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-y-2-x-x-3-2-example/sssssp7b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-y-2-x-x-3-2-example/sssssp7b"/>
      <lastmod>2026-11-02T17:40:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/phantom-graph-y-2-x-x-3-2-example/sssssp7b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-y-2-x-x-3-2-example/sssssp7b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-y-2-x-x-3-2-example/sssssp7b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-y-2-x-x-3-2-example/sssssp7b"/>
      <lastmod>2026-11-02T17:40:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-subtraction-demo-unlike-denominators/sssssp73</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-subtraction-demo-unlike-denominators/sssssp73"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-subtraction-demo-unlike-denominators/sssssp73"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-subtraction-demo-unlike-denominators/sssssp73"/>
      <lastmod>2026-11-02T15:08:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-subtraction-demo-unlike-denominators/sssssp73</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-subtraction-demo-unlike-denominators/sssssp73"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-subtraction-demo-unlike-denominators/sssssp73"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-subtraction-demo-unlike-denominators/sssssp73"/>
      <lastmod>2026-11-02T15:08:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-practice/sssssp7q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-practice/sssssp7q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-practice/sssssp7q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-practice/sssssp7q"/>
      <lastmod>2026-11-01T19:00:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-practice/sssssp7q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-practice/sssssp7q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-practice/sssssp7q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-practice/sssssp7q"/>
      <lastmod>2026-11-01T19:00:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graph-translation-by-jessica/sssssp71</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-translation-by-jessica/sssssp71"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-translation-by-jessica/sssssp71"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-translation-by-jessica/sssssp71"/>
      <lastmod>2026-11-02T16:50:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graph-translation-by-jessica/sssssp71</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-translation-by-jessica/sssssp71"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-translation-by-jessica/sssssp71"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-translation-by-jessica/sssssp71"/>
      <lastmod>2026-11-02T16:50:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/test-your-mental-arithmetic-skills/sssssp7m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/test-your-mental-arithmetic-skills/sssssp7m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/test-your-mental-arithmetic-skills/sssssp7m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/test-your-mental-arithmetic-skills/sssssp7m"/>
      <lastmod>2026-11-02T17:58:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/test-your-mental-arithmetic-skills/sssssp7m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/test-your-mental-arithmetic-skills/sssssp7m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/test-your-mental-arithmetic-skills/sssssp7m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/test-your-mental-arithmetic-skills/sssssp7m"/>
      <lastmod>2026-11-02T17:58:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-numbers-algebraic-and-trigonometric-form/sssssp7j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-numbers-algebraic-and-trigonometric-form/sssssp7j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-numbers-algebraic-and-trigonometric-form/sssssp7j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-numbers-algebraic-and-trigonometric-form/sssssp7j"/>
      <lastmod>2026-11-02T09:36:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-numbers-algebraic-and-trigonometric-form/sssssp7j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-numbers-algebraic-and-trigonometric-form/sssssp7j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-numbers-algebraic-and-trigonometric-form/sssssp7j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-numbers-algebraic-and-trigonometric-form/sssssp7j"/>
      <lastmod>2026-11-02T09:36:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-knot/sssssp7p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-knot/sssssp7p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-knot/sssssp7p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-knot/sssssp7p"/>
      <lastmod>2026-11-01T23:34:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-knot/sssssp7p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-knot/sssssp7p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-knot/sssssp7p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-knot/sssssp7p"/>
      <lastmod>2026-11-01T23:34:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rocket-trajectory-from-satellite-launch/sssssp7w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rocket-trajectory-from-satellite-launch/sssssp7w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rocket-trajectory-from-satellite-launch/sssssp7w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rocket-trajectory-from-satellite-launch/sssssp7w"/>
      <lastmod>2026-11-01T19:04:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rocket-trajectory-from-satellite-launch/sssssp7w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rocket-trajectory-from-satellite-launch/sssssp7w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rocket-trajectory-from-satellite-launch/sssssp7w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rocket-trajectory-from-satellite-launch/sssssp7w"/>
      <lastmod>2026-11-01T19:04:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-with-two-focus-definitions/sssssp76</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-with-two-focus-definitions/sssssp76"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-with-two-focus-definitions/sssssp76"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-with-two-focus-definitions/sssssp76"/>
      <lastmod>2026-11-01T19:26:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-with-two-focus-definitions/sssssp76</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-with-two-focus-definitions/sssssp76"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-with-two-focus-definitions/sssssp76"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-with-two-focus-definitions/sssssp76"/>
      <lastmod>2026-11-01T19:26:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-rrobillard/sssssp7g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-rrobillard/sssssp7g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-rrobillard/sssssp7g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-rrobillard/sssssp7g"/>
      <lastmod>2026-11-01T23:57:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-rrobillard/sssssp7g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-rrobillard/sssssp7g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-rrobillard/sssssp7g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-rrobillard/sssssp7g"/>
      <lastmod>2026-11-01T23:57:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/another-example-with-a-different-array/sssssp79</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/another-example-with-a-different-array/sssssp79"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/another-example-with-a-different-array/sssssp79"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/another-example-with-a-different-array/sssssp79"/>
      <lastmod>2026-11-02T00:45:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/another-example-with-a-different-array/sssssp79</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/another-example-with-a-different-array/sssssp79"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/another-example-with-a-different-array/sssssp79"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/another-example-with-a-different-array/sssssp79"/>
      <lastmod>2026-11-02T00:45:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygonal-starburst/sssssp7e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygonal-starburst/sssssp7e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygonal-starburst/sssssp7e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygonal-starburst/sssssp7e"/>
      <lastmod>2026-11-02T09:39:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygonal-starburst/sssssp7e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygonal-starburst/sssssp7e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygonal-starburst/sssssp7e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygonal-starburst/sssssp7e"/>
      <lastmod>2026-11-02T09:39:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-auston-b-cron/sssssp7v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-auston-b-cron/sssssp7v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-demonstration-by-auston-b-cron/sssssp7v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-auston-b-cron/sssssp7v"/>
      <lastmod>2026-11-01T19:13:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-addition-demonstration-by-auston-b-cron/sssssp7v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-auston-b-cron/sssssp7v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-demonstration-by-auston-b-cron/sssssp7v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-auston-b-cron/sssssp7v"/>
      <lastmod>2026-11-01T19:13:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-revolution-discussion-ii-b-interactive-integral-demo/sssssp74</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-discussion-ii-b-interactive-integral-demo/sssssp74"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-discussion-ii-b-interactive-integral-demo/sssssp74"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-discussion-ii-b-interactive-integral-demo/sssssp74"/>
      <lastmod>2026-11-02T16:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-revolution-discussion-ii-b-interactive-integral-demo/sssssp74</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-discussion-ii-b-interactive-integral-demo/sssssp74"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-discussion-ii-b-interactive-integral-demo/sssssp74"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-discussion-ii-b-interactive-integral-demo/sssssp74"/>
      <lastmod>2026-11-02T16:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mclaughlin-a-orthocenter/sssssp7l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mclaughlin-a-orthocenter/sssssp7l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mclaughlin-a-orthocenter/sssssp7l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mclaughlin-a-orthocenter/sssssp7l"/>
      <lastmod>2026-11-02T18:35:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mclaughlin-a-orthocenter/sssssp7l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mclaughlin-a-orthocenter/sssssp7l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mclaughlin-a-orthocenter/sssssp7l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mclaughlin-a-orthocenter/sssssp7l"/>
      <lastmod>2026-11-02T18:35:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/steiner-construction/sssssp7y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/steiner-construction/sssssp7y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/steiner-construction/sssssp7y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/steiner-construction/sssssp7y"/>
      <lastmod>2026-11-02T12:22:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/steiner-construction/sssssp7y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/steiner-construction/sssssp7y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/steiner-construction/sssssp7y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/steiner-construction/sssssp7y"/>
      <lastmod>2026-11-02T12:22:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualize-mean-and-median-by-david-wees/sssssp7a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualize-mean-and-median-by-david-wees/sssssp7a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualize-mean-and-median-by-david-wees/sssssp7a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualize-mean-and-median-by-david-wees/sssssp7a"/>
      <lastmod>2026-11-01T23:26:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualize-mean-and-median-by-david-wees/sssssp7a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualize-mean-and-median-by-david-wees/sssssp7a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualize-mean-and-median-by-david-wees/sssssp7a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualize-mean-and-median-by-david-wees/sssssp7a"/>
      <lastmod>2026-11-01T23:26:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/calculus-definite-integral-example-1-by-bencvu/sssssp7c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculus-definite-integral-example-1-by-bencvu/sssssp7c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculus-definite-integral-example-1-by-bencvu/sssssp7c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculus-definite-integral-example-1-by-bencvu/sssssp7c"/>
      <lastmod>2026-11-02T18:43:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/calculus-definite-integral-example-1-by-bencvu/sssssp7c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculus-definite-integral-example-1-by-bencvu/sssssp7c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculus-definite-integral-example-1-by-bencvu/sssssp7c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculus-definite-integral-example-1-by-bencvu/sssssp7c"/>
      <lastmod>2026-11-02T18:43:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-volume-by-j-b/sssssp7r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-volume-by-j-b/sssssp7r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-volume-by-j-b/sssssp7r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-volume-by-j-b/sssssp7r"/>
      <lastmod>2026-11-02T18:58:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-volume-by-j-b/sssssp7r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-volume-by-j-b/sssssp7r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-volume-by-j-b/sssssp7r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-volume-by-j-b/sssssp7r"/>
      <lastmod>2026-11-02T18:58:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-and-sphere/sssssp7h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-and-sphere/sssssp7h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-and-sphere/sssssp7h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-and-sphere/sssssp7h"/>
      <lastmod>2026-11-02T18:07:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-and-sphere/sssssp7h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-and-sphere/sssssp7h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-and-sphere/sssssp7h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-and-sphere/sssssp7h"/>
      <lastmod>2026-11-02T18:07:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/18-19-navarra-selectividad-a2-vector-problem/sssssp7t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/18-19-navarra-selectividad-a2-vector-problem/sssssp7t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/18-19-navarra-selectividad-a2-vector-problem/sssssp7t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/18-19-navarra-selectividad-a2-vector-problem/sssssp7t"/>
      <lastmod>2026-11-01T21:54:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/18-19-navarra-selectividad-a2-vector-problem/sssssp7t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/18-19-navarra-selectividad-a2-vector-problem/sssssp7t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/18-19-navarra-selectividad-a2-vector-problem/sssssp7t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/18-19-navarra-selectividad-a2-vector-problem/sssssp7t"/>
      <lastmod>2026-11-01T21:54:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/factoring-trinomials-with-other-leading-coefficients/sssssp7x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factoring-trinomials-with-other-leading-coefficients/sssssp7x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factoring-trinomials-with-other-leading-coefficients/sssssp7x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factoring-trinomials-with-other-leading-coefficients/sssssp7x"/>
      <lastmod>2026-11-02T18:05:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/factoring-trinomials-with-other-leading-coefficients/sssssp7x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factoring-trinomials-with-other-leading-coefficients/sssssp7x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factoring-trinomials-with-other-leading-coefficients/sssssp7x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factoring-trinomials-with-other-leading-coefficients/sssssp7x"/>
      <lastmod>2026-11-02T18:05:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/draw-a-parabola-from-definition/sssssp7i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-a-parabola-from-definition/sssssp7i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-a-parabola-from-definition/sssssp7i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-a-parabola-from-definition/sssssp7i"/>
      <lastmod>2026-11-01T23:29:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/draw-a-parabola-from-definition/sssssp7i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-a-parabola-from-definition/sssssp7i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-a-parabola-from-definition/sssssp7i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-a-parabola-from-definition/sssssp7i"/>
      <lastmod>2026-11-01T23:29:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prism-surface-area-by-k-goodwin/sssssp7o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-surface-area-by-k-goodwin/sssssp7o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-surface-area-by-k-goodwin/sssssp7o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-surface-area-by-k-goodwin/sssssp7o"/>
      <lastmod>2026-11-02T18:12:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prism-surface-area-by-k-goodwin/sssssp7o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-surface-area-by-k-goodwin/sssssp7o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-surface-area-by-k-goodwin/sssssp7o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-surface-area-by-k-goodwin/sssssp7o"/>
      <lastmod>2026-11-02T18:12:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/matrix-cryptography-encryption-and-decryption-using-inverse-and-transpose/ssssspns</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-cryptography-encryption-and-decryption-using-inverse-and-transpose/ssssspns"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-cryptography-encryption-and-decryption-using-inverse-and-transpose/ssssspns"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-cryptography-encryption-and-decryption-using-inverse-and-transpose/ssssspns"/>
      <lastmod>2026-11-02T02:59:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/matrix-cryptography-encryption-and-decryption-using-inverse-and-transpose/ssssspns</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-cryptography-encryption-and-decryption-using-inverse-and-transpose/ssssspns"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-cryptography-encryption-and-decryption-using-inverse-and-transpose/ssssspns"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-cryptography-encryption-and-decryption-using-inverse-and-transpose/ssssspns"/>
      <lastmod>2026-11-02T02:59:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-multiplication/ssssspn7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-multiplication/ssssspn7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-multiplication/ssssspn7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-multiplication/ssssspn7"/>
      <lastmod>2026-11-02T09:38:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-multiplication/ssssspn7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-multiplication/ssssspn7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-multiplication/ssssspn7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-multiplication/ssssspn7"/>
      <lastmod>2026-11-02T09:38:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-intersection-demo/ssssspnn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-intersection-demo/ssssspnn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-intersection-demo/ssssspnn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-intersection-demo/ssssspnn"/>
      <lastmod>2026-11-01T20:56:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-intersection-demo/ssssspnn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-intersection-demo/ssssspnn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-intersection-demo/ssssspnn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-intersection-demo/ssssspnn"/>
      <lastmod>2026-11-01T20:56:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triple-integral-in-spherical-coordinates/ssssspn2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triple-integral-in-spherical-coordinates/ssssspn2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triple-integral-in-spherical-coordinates/ssssspn2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triple-integral-in-spherical-coordinates/ssssspn2"/>
      <lastmod>2026-11-02T15:17:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triple-integral-in-spherical-coordinates/ssssspn2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triple-integral-in-spherical-coordinates/ssssspn2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triple-integral-in-spherical-coordinates/ssssspn2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triple-integral-in-spherical-coordinates/ssssspn2"/>
      <lastmod>2026-11-02T15:17:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-relationship-of-a-right-triangle-problem/ssssspnk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-relationship-of-a-right-triangle-problem/ssssspnk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-relationship-of-a-right-triangle-problem/ssssspnk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-relationship-of-a-right-triangle-problem/ssssspnk"/>
      <lastmod>2026-11-02T18:15:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-relationship-of-a-right-triangle-problem/ssssspnk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-relationship-of-a-right-triangle-problem/ssssspnk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-relationship-of-a-right-triangle-problem/ssssspnk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-relationship-of-a-right-triangle-problem/ssssspnk"/>
      <lastmod>2026-11-02T18:15:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/planes-and-normals/ssssspnz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planes-and-normals/ssssspnz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes-and-normals/ssssspnz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes-and-normals/ssssspnz"/>
      <lastmod>2026-11-02T13:42:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/planes-and-normals/ssssspnz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planes-and-normals/ssssspnz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes-and-normals/ssssspnz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes-and-normals/ssssspnz"/>
      <lastmod>2026-11-02T13:42:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/max-bill-painting-matei-ionescu/ssssspn0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/max-bill-painting-matei-ionescu/ssssspn0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/max-bill-painting-matei-ionescu/ssssspn0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/max-bill-painting-matei-ionescu/ssssspn0"/>
      <lastmod>2026-11-02T17:55:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/max-bill-painting-matei-ionescu/ssssspn0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/max-bill-painting-matei-ionescu/ssssspn0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/max-bill-painting-matei-ionescu/ssssspn0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/max-bill-painting-matei-ionescu/ssssspn0"/>
      <lastmod>2026-11-02T17:55:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-construction-example-by-dmhrinya395/ssssspnd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-example-by-dmhrinya395/ssssspnd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-example-by-dmhrinya395/ssssspnd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-example-by-dmhrinya395/ssssspnd"/>
      <lastmod>2026-11-02T17:52:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-construction-example-by-dmhrinya395/ssssspnd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-example-by-dmhrinya395/ssssspnd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-example-by-dmhrinya395/ssssspnd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-example-by-dmhrinya395/ssssspnd"/>
      <lastmod>2026-11-02T17:52:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/snowboard-jump-quick-regression-exploration/ssssspnf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/snowboard-jump-quick-regression-exploration/ssssspnf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/snowboard-jump-quick-regression-exploration/ssssspnf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/snowboard-jump-quick-regression-exploration/ssssspnf"/>
      <lastmod>2026-11-01T21:25:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/snowboard-jump-quick-regression-exploration/ssssspnf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/snowboard-jump-quick-regression-exploration/ssssspnf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/snowboard-jump-quick-regression-exploration/ssssspnf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/snowboard-jump-quick-regression-exploration/ssssspnf"/>
      <lastmod>2026-11-01T21:25:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/voronoi-diffusion-view/ssssspn8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/voronoi-diffusion-view/ssssspn8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/voronoi-diffusion-view/ssssspn8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/voronoi-diffusion-view/ssssspn8"/>
      <lastmod>2026-11-01T20:50:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/voronoi-diffusion-view/ssssspn8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/voronoi-diffusion-view/ssssspn8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/voronoi-diffusion-view/ssssspn8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/voronoi-diffusion-view/ssssspn8"/>
      <lastmod>2026-11-01T20:50:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/temperature-vs-time-simulation-by-harrytomalley/ssssspnu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temperature-vs-time-simulation-by-harrytomalley/ssssspnu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temperature-vs-time-simulation-by-harrytomalley/ssssspnu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temperature-vs-time-simulation-by-harrytomalley/ssssspnu"/>
      <lastmod>2026-11-02T18:32:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/temperature-vs-time-simulation-by-harrytomalley/ssssspnu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temperature-vs-time-simulation-by-harrytomalley/ssssspnu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temperature-vs-time-simulation-by-harrytomalley/ssssspnu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temperature-vs-time-simulation-by-harrytomalley/ssssspnu"/>
      <lastmod>2026-11-02T18:32:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-dilations/ssssspn5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-dilations/ssssspn5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-dilations/ssssspn5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-dilations/ssssspn5"/>
      <lastmod>2026-11-02T02:24:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-dilations/ssssspn5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-dilations/ssssspn5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-dilations/ssssspn5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-dilations/ssssspn5"/>
      <lastmod>2026-11-02T02:24:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/difference-of-two-line-segments/ssssspnb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/difference-of-two-line-segments/ssssspnb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/difference-of-two-line-segments/ssssspnb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/difference-of-two-line-segments/ssssspnb"/>
      <lastmod>2026-11-02T16:58:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/difference-of-two-line-segments/ssssspnb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/difference-of-two-line-segments/ssssspnb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/difference-of-two-line-segments/ssssspnb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/difference-of-two-line-segments/ssssspnb"/>
      <lastmod>2026-11-02T16:58:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reverse-percentage-calculation/ssssspn3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reverse-percentage-calculation/ssssspn3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reverse-percentage-calculation/ssssspn3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reverse-percentage-calculation/ssssspn3"/>
      <lastmod>2026-11-02T15:50:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reverse-percentage-calculation/ssssspn3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reverse-percentage-calculation/ssssspn3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reverse-percentage-calculation/ssssspn3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reverse-percentage-calculation/ssssspn3"/>
      <lastmod>2026-11-02T15:50:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cubes-demonstration/ssssspnq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubes-demonstration/ssssspnq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubes-demonstration/ssssspnq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubes-demonstration/ssssspnq"/>
      <lastmod>2026-11-02T09:35:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cubes-demonstration/ssssspnq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubes-demonstration/ssssspnq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubes-demonstration/ssssspnq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubes-demonstration/ssssspnq"/>
      <lastmod>2026-11-02T09:35:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-pinhole-camera-visualization/ssssspn1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-pinhole-camera-visualization/ssssspn1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-pinhole-camera-visualization/ssssspn1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-pinhole-camera-visualization/ssssspn1"/>
      <lastmod>2026-11-01T21:54:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-pinhole-camera-visualization/ssssspn1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-pinhole-camera-visualization/ssssspn1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-pinhole-camera-visualization/ssssspn1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-pinhole-camera-visualization/ssssspn1"/>
      <lastmod>2026-11-01T21:54:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/book-graph-with-standard-form-integer-intercepts/ssssspnm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/book-graph-with-standard-form-integer-intercepts/ssssspnm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/book-graph-with-standard-form-integer-intercepts/ssssspnm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/book-graph-with-standard-form-integer-intercepts/ssssspnm"/>
      <lastmod>2026-11-02T00:18:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/book-graph-with-standard-form-integer-intercepts/ssssspnm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/book-graph-with-standard-form-integer-intercepts/ssssspnm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/book-graph-with-standard-form-integer-intercepts/ssssspnm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/book-graph-with-standard-form-integer-intercepts/ssssspnm"/>
      <lastmod>2026-11-02T00:18:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/using-inverse-trig-functions-activity/ssssspnj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-inverse-trig-functions-activity/ssssspnj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-inverse-trig-functions-activity/ssssspnj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-inverse-trig-functions-activity/ssssspnj"/>
      <lastmod>2026-11-02T16:30:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/using-inverse-trig-functions-activity/ssssspnj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-inverse-trig-functions-activity/ssssspnj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-inverse-trig-functions-activity/ssssspnj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-inverse-trig-functions-activity/ssssspnj"/>
      <lastmod>2026-11-02T16:30:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-net-by-blakemasson/ssssspnp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-net-by-blakemasson/ssssspnp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-net-by-blakemasson/ssssspnp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-net-by-blakemasson/ssssspnp"/>
      <lastmod>2026-11-02T18:58:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-net-by-blakemasson/ssssspnp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-net-by-blakemasson/ssssspnp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-net-by-blakemasson/ssssspnp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-net-by-blakemasson/ssssspnp"/>
      <lastmod>2026-11-02T18:58:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-sine-cosine-period-demo/ssssspnw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-sine-cosine-period-demo/ssssspnw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-sine-cosine-period-demo/ssssspnw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-sine-cosine-period-demo/ssssspnw"/>
      <lastmod>2026-11-02T15:50:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-sine-cosine-period-demo/ssssspnw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-sine-cosine-period-demo/ssssspnw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-sine-cosine-period-demo/ssssspnw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-sine-cosine-period-demo/ssssspnw"/>
      <lastmod>2026-11-02T15:50:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-exploration-by-rick-cazzato/ssssspn6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-exploration-by-rick-cazzato/ssssspn6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-exploration-by-rick-cazzato/ssssspn6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-exploration-by-rick-cazzato/ssssspn6"/>
      <lastmod>2026-11-01T23:54:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-exploration-by-rick-cazzato/ssssspn6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-exploration-by-rick-cazzato/ssssspn6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-exploration-by-rick-cazzato/ssssspn6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-exploration-by-rick-cazzato/ssssspn6"/>
      <lastmod>2026-11-01T23:54:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/investigating-inequalities/ssssspng</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-inequalities/ssssspng"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-inequalities/ssssspng"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-inequalities/ssssspng"/>
      <lastmod>2026-11-02T18:09:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/investigating-inequalities/ssssspng</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-inequalities/ssssspng"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-inequalities/ssssspng"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-inequalities/ssssspng"/>
      <lastmod>2026-11-02T18:09:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bounding-using-archimedes-polygon-method/ssssspn9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bounding-using-archimedes-polygon-method/ssssspn9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bounding-using-archimedes-polygon-method/ssssspn9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bounding-using-archimedes-polygon-method/ssssspn9"/>
      <lastmod>2026-11-02T00:01:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bounding-using-archimedes-polygon-method/ssssspn9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bounding-using-archimedes-polygon-method/ssssspn9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bounding-using-archimedes-polygon-method/ssssspn9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bounding-using-archimedes-polygon-method/ssssspn9"/>
      <lastmod>2026-11-02T00:01:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-rectangle-at-the-heart-of-geometric-figures-areas/ssssspne</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-rectangle-at-the-heart-of-geometric-figures-areas/ssssspne"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-rectangle-at-the-heart-of-geometric-figures-areas/ssssspne"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-rectangle-at-the-heart-of-geometric-figures-areas/ssssspne"/>
      <lastmod>2026-11-01T21:00:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-rectangle-at-the-heart-of-geometric-figures-areas/ssssspne</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-rectangle-at-the-heart-of-geometric-figures-areas/ssssspne"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-rectangle-at-the-heart-of-geometric-figures-areas/ssssspne"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-rectangle-at-the-heart-of-geometric-figures-areas/ssssspne"/>
      <lastmod>2026-11-01T21:00:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/segment-bisector-definition/ssssspnv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/segment-bisector-definition/ssssspnv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/segment-bisector-definition/ssssspnv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/segment-bisector-definition/ssssspnv"/>
      <lastmod>2026-11-02T12:46:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/segment-bisector-definition/ssssspnv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/segment-bisector-definition/ssssspnv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/segment-bisector-definition/ssssspnv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/segment-bisector-definition/ssssspnv"/>
      <lastmod>2026-11-02T12:46:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-activity-3-and-4/ssssspn4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-activity-3-and-4/ssssspn4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-activity-3-and-4/ssssspn4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-activity-3-and-4/ssssspn4"/>
      <lastmod>2026-11-01T23:33:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-activity-3-and-4/ssssspn4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-activity-3-and-4/ssssspn4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-activity-3-and-4/ssssspn4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-activity-3-and-4/ssssspn4"/>
      <lastmod>2026-11-01T23:33:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trig-ratios-on-unit-circle-by-sam-waterfield/ssssspnl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trig-ratios-on-unit-circle-by-sam-waterfield/ssssspnl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trig-ratios-on-unit-circle-by-sam-waterfield/ssssspnl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trig-ratios-on-unit-circle-by-sam-waterfield/ssssspnl"/>
      <lastmod>2026-11-02T18:39:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trig-ratios-on-unit-circle-by-sam-waterfield/ssssspnl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trig-ratios-on-unit-circle-by-sam-waterfield/ssssspnl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trig-ratios-on-unit-circle-by-sam-waterfield/ssssspnl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trig-ratios-on-unit-circle-by-sam-waterfield/ssssspnl"/>
      <lastmod>2026-11-02T18:39:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/resultant-vectors-vector-addition-visualization/ssssspny</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/resultant-vectors-vector-addition-visualization/ssssspny"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/resultant-vectors-vector-addition-visualization/ssssspny"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/resultant-vectors-vector-addition-visualization/ssssspny"/>
      <lastmod>2026-11-02T18:31:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/resultant-vectors-vector-addition-visualization/ssssspny</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/resultant-vectors-vector-addition-visualization/ssssspny"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/resultant-vectors-vector-addition-visualization/ssssspny"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/resultant-vectors-vector-addition-visualization/ssssspny"/>
      <lastmod>2026-11-02T18:31:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-complex-roots-of-cubic-equations/ssssspna</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-complex-roots-of-cubic-equations/ssssspna"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-complex-roots-of-cubic-equations/ssssspna"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-complex-roots-of-cubic-equations/ssssspna"/>
      <lastmod>2026-11-01T23:23:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-complex-roots-of-cubic-equations/ssssspna</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-complex-roots-of-cubic-equations/ssssspna"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-complex-roots-of-cubic-equations/ssssspna"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-complex-roots-of-cubic-equations/ssssspna"/>
      <lastmod>2026-11-01T23:23:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-dot-product-demo/ssssspnc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-dot-product-demo/ssssspnc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-dot-product-demo/ssssspnc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-dot-product-demo/ssssspnc"/>
      <lastmod>2026-11-02T15:47:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-dot-product-demo/ssssspnc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-dot-product-demo/ssssspnc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-dot-product-demo/ssssspnc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-dot-product-demo/ssssspnc"/>
      <lastmod>2026-11-02T15:47:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/standard-deviation-and-distribution-visualization/ssssspnr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-deviation-and-distribution-visualization/ssssspnr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-deviation-and-distribution-visualization/ssssspnr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-deviation-and-distribution-visualization/ssssspnr"/>
      <lastmod>2026-11-02T02:56:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/standard-deviation-and-distribution-visualization/ssssspnr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-deviation-and-distribution-visualization/ssssspnr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-deviation-and-distribution-visualization/ssssspnr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-deviation-and-distribution-visualization/ssssspnr"/>
      <lastmod>2026-11-02T02:56:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/2d-vectors-and-circle-construction-by-claudio-mart-nez-gil/ssssspnh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-vectors-and-circle-construction-by-claudio-mart-nez-gil/ssssspnh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-vectors-and-circle-construction-by-claudio-mart-nez-gil/ssssspnh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-vectors-and-circle-construction-by-claudio-mart-nez-gil/ssssspnh"/>
      <lastmod>2026-11-01T23:14:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/2d-vectors-and-circle-construction-by-claudio-mart-nez-gil/ssssspnh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-vectors-and-circle-construction-by-claudio-mart-nez-gil/ssssspnh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-vectors-and-circle-construction-by-claudio-mart-nez-gil/ssssspnh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-vectors-and-circle-construction-by-claudio-mart-nez-gil/ssssspnh"/>
      <lastmod>2026-11-01T23:14:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/point-and-line-segment/ssssspnt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-and-line-segment/ssssspnt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-and-line-segment/ssssspnt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-and-line-segment/ssssspnt"/>
      <lastmod>2026-11-02T18:27:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/point-and-line-segment/ssssspnt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-and-line-segment/ssssspnt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-and-line-segment/ssssspnt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-and-line-segment/ssssspnt"/>
      <lastmod>2026-11-02T18:27:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/three-forms-of-quadratic-functions/ssssspnx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-forms-of-quadratic-functions/ssssspnx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-forms-of-quadratic-functions/ssssspnx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-forms-of-quadratic-functions/ssssspnx"/>
      <lastmod>2026-11-01T23:14:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/three-forms-of-quadratic-functions/ssssspnx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-forms-of-quadratic-functions/ssssspnx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-forms-of-quadratic-functions/ssssspnx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-forms-of-quadratic-functions/ssssspnx"/>
      <lastmod>2026-11-01T23:14:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-numbers-that-add-to-s-and-multiply-to-p/ssssspni</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-numbers-that-add-to-s-and-multiply-to-p/ssssspni"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-numbers-that-add-to-s-and-multiply-to-p/ssssspni"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-numbers-that-add-to-s-and-multiply-to-p/ssssspni"/>
      <lastmod>2026-11-02T09:48:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-numbers-that-add-to-s-and-multiply-to-p/ssssspni</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-numbers-that-add-to-s-and-multiply-to-p/ssssspni"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-numbers-that-add-to-s-and-multiply-to-p/ssssspni"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-numbers-that-add-to-s-and-multiply-to-p/ssssspni"/>
      <lastmod>2026-11-02T09:48:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-volume-calculation-and-demonstration/ssssspno</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-volume-calculation-and-demonstration/ssssspno"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-volume-calculation-and-demonstration/ssssspno"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-volume-calculation-and-demonstration/ssssspno"/>
      <lastmod>2026-11-02T00:41:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-volume-calculation-and-demonstration/ssssspno</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-volume-calculation-and-demonstration/ssssspno"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-volume-calculation-and-demonstration/ssssspno"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-volume-calculation-and-demonstration/ssssspno"/>
      <lastmod>2026-11-02T00:41:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-in-column-form/sssssp2s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-in-column-form/sssssp2s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-in-column-form/sssssp2s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-in-column-form/sssssp2s"/>
      <lastmod>2026-11-01T21:21:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-in-column-form/sssssp2s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-in-column-form/sssssp2s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-in-column-form/sssssp2s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-in-column-form/sssssp2s"/>
      <lastmod>2026-11-01T21:21:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-and-step-functions-dynamic-sequence-and-circle-interaction/sssssp27</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-and-step-functions-dynamic-sequence-and-circle-interaction/sssssp27"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-and-step-functions-dynamic-sequence-and-circle-interaction/sssssp27"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-and-step-functions-dynamic-sequence-and-circle-interaction/sssssp27"/>
      <lastmod>2026-11-02T12:42:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-and-step-functions-dynamic-sequence-and-circle-interaction/sssssp27</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-and-step-functions-dynamic-sequence-and-circle-interaction/sssssp27"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-and-step-functions-dynamic-sequence-and-circle-interaction/sssssp27"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-and-step-functions-dynamic-sequence-and-circle-interaction/sssssp27"/>
      <lastmod>2026-11-02T12:42:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/non-square-rhombus-by-420328/sssssp2n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/non-square-rhombus-by-420328/sssssp2n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/non-square-rhombus-by-420328/sssssp2n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/non-square-rhombus-by-420328/sssssp2n"/>
      <lastmod>2026-11-02T16:50:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/non-square-rhombus-by-420328/sssssp2n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/non-square-rhombus-by-420328/sssssp2n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/non-square-rhombus-by-420328/sssssp2n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/non-square-rhombus-by-420328/sssssp2n"/>
      <lastmod>2026-11-02T16:50:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/copy-of-3-way-color-changing-derivative-grapher/sssssp22</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copy-of-3-way-color-changing-derivative-grapher/sssssp22"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copy-of-3-way-color-changing-derivative-grapher/sssssp22"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copy-of-3-way-color-changing-derivative-grapher/sssssp22"/>
      <lastmod>2026-11-01T21:31:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/copy-of-3-way-color-changing-derivative-grapher/sssssp22</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copy-of-3-way-color-changing-derivative-grapher/sssssp22"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copy-of-3-way-color-changing-derivative-grapher/sssssp22"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copy-of-3-way-color-changing-derivative-grapher/sssssp22"/>
      <lastmod>2026-11-01T21:31:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-in-degree-mode/sssssp2k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-in-degree-mode/sssssp2k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-in-degree-mode/sssssp2k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-in-degree-mode/sssssp2k"/>
      <lastmod>2026-11-02T12:44:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-in-degree-mode/sssssp2k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-in-degree-mode/sssssp2k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-in-degree-mode/sssssp2k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-in-degree-mode/sssssp2k"/>
      <lastmod>2026-11-02T12:44:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygons-and-circumcircle/sssssp2z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygons-and-circumcircle/sssssp2z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygons-and-circumcircle/sssssp2z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygons-and-circumcircle/sssssp2z"/>
      <lastmod>2026-11-02T12:46:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygons-and-circumcircle/sssssp2z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygons-and-circumcircle/sssssp2z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygons-and-circumcircle/sssssp2z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygons-and-circumcircle/sssssp2z"/>
      <lastmod>2026-11-02T12:46:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-interpolation/sssssp20</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-interpolation/sssssp20"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-interpolation/sssssp20"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-interpolation/sssssp20"/>
      <lastmod>2026-11-01T21:35:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-interpolation/sssssp20</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-interpolation/sssssp20"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-interpolation/sssssp20"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-interpolation/sssssp20"/>
      <lastmod>2026-11-01T21:35:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilating-a-prism-about-a-vertex/sssssp2d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilating-a-prism-about-a-vertex/sssssp2d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilating-a-prism-about-a-vertex/sssssp2d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilating-a-prism-about-a-vertex/sssssp2d"/>
      <lastmod>2026-11-01T21:58:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilating-a-prism-about-a-vertex/sssssp2d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilating-a-prism-about-a-vertex/sssssp2d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilating-a-prism-about-a-vertex/sssssp2d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilating-a-prism-about-a-vertex/sssssp2d"/>
      <lastmod>2026-11-01T21:58:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sss-congruence-constructing-triangles-with-three-pairs-of-equal-sides/sssssp2f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-congruence-constructing-triangles-with-three-pairs-of-equal-sides/sssssp2f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-congruence-constructing-triangles-with-three-pairs-of-equal-sides/sssssp2f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-congruence-constructing-triangles-with-three-pairs-of-equal-sides/sssssp2f"/>
      <lastmod>2026-11-02T16:54:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sss-congruence-constructing-triangles-with-three-pairs-of-equal-sides/sssssp2f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-congruence-constructing-triangles-with-three-pairs-of-equal-sides/sssssp2f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-congruence-constructing-triangles-with-three-pairs-of-equal-sides/sssssp2f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-congruence-constructing-triangles-with-three-pairs-of-equal-sides/sssssp2f"/>
      <lastmod>2026-11-02T16:54:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/composite-solid-pyramid-on-rectangular-prism/sssssp28</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/composite-solid-pyramid-on-rectangular-prism/sssssp28"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/composite-solid-pyramid-on-rectangular-prism/sssssp28"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/composite-solid-pyramid-on-rectangular-prism/sssssp28"/>
      <lastmod>2026-11-02T15:30:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/composite-solid-pyramid-on-rectangular-prism/sssssp28</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/composite-solid-pyramid-on-rectangular-prism/sssssp28"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/composite-solid-pyramid-on-rectangular-prism/sssssp28"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/composite-solid-pyramid-on-rectangular-prism/sssssp28"/>
      <lastmod>2026-11-02T15:30:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-law-of-sines-dynamic-geometry-demonstration/sssssp2u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-law-of-sines-dynamic-geometry-demonstration/sssssp2u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-law-of-sines-dynamic-geometry-demonstration/sssssp2u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-law-of-sines-dynamic-geometry-demonstration/sssssp2u"/>
      <lastmod>2026-11-01T21:31:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-law-of-sines-dynamic-geometry-demonstration/sssssp2u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-law-of-sines-dynamic-geometry-demonstration/sssssp2u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-law-of-sines-dynamic-geometry-demonstration/sssssp2u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-law-of-sines-dynamic-geometry-demonstration/sssssp2u"/>
      <lastmod>2026-11-01T21:31:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-construction-on-cube-surface/sssssp25</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-on-cube-surface/sssssp25"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-on-cube-surface/sssssp25"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-on-cube-surface/sssssp25"/>
      <lastmod>2026-11-02T00:19:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-construction-on-cube-surface/sssssp25</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-on-cube-surface/sssssp25"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-on-cube-surface/sssssp25"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-on-cube-surface/sssssp25"/>
      <lastmod>2026-11-02T00:19:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-graphs-of-sin-cos-tan/sssssp2b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-graphs-of-sin-cos-tan/sssssp2b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-graphs-of-sin-cos-tan/sssssp2b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-graphs-of-sin-cos-tan/sssssp2b"/>
      <lastmod>2026-11-01T19:20:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-graphs-of-sin-cos-tan/sssssp2b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-graphs-of-sin-cos-tan/sssssp2b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-graphs-of-sin-cos-tan/sssssp2b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-graphs-of-sin-cos-tan/sssssp2b"/>
      <lastmod>2026-11-01T19:20:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilations-focus-on-enlargement/sssssp23</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-focus-on-enlargement/sssssp23"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-focus-on-enlargement/sssssp23"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-focus-on-enlargement/sssssp23"/>
      <lastmod>2026-11-02T18:37:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilations-focus-on-enlargement/sssssp23</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-focus-on-enlargement/sssssp23"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-focus-on-enlargement/sssssp23"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-focus-on-enlargement/sssssp23"/>
      <lastmod>2026-11-02T18:37:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/elliptic-motion/sssssp2q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/elliptic-motion/sssssp2q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/elliptic-motion/sssssp2q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/elliptic-motion/sssssp2q"/>
      <lastmod>2026-11-01T21:33:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/elliptic-motion/sssssp2q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/elliptic-motion/sssssp2q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/elliptic-motion/sssssp2q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/elliptic-motion/sssssp2q"/>
      <lastmod>2026-11-01T21:33:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/representing-fractions-with-area-models/sssssp21</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/representing-fractions-with-area-models/sssssp21"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/representing-fractions-with-area-models/sssssp21"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/representing-fractions-with-area-models/sssssp21"/>
      <lastmod>2026-11-02T18:58:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/representing-fractions-with-area-models/sssssp21</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/representing-fractions-with-area-models/sssssp21"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/representing-fractions-with-area-models/sssssp21"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/representing-fractions-with-area-models/sssssp21"/>
      <lastmod>2026-11-02T18:58:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/midpoint-between-two-points/sssssp2m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/midpoint-between-two-points/sssssp2m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/midpoint-between-two-points/sssssp2m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/midpoint-between-two-points/sssssp2m"/>
      <lastmod>2026-11-02T16:50:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/midpoint-between-two-points/sssssp2m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/midpoint-between-two-points/sssssp2m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/midpoint-between-two-points/sssssp2m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/midpoint-between-two-points/sssssp2m"/>
      <lastmod>2026-11-02T16:50:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-boxplots-visual-analysis-of-multiple-data-distributions/sssssp2j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-boxplots-visual-analysis-of-multiple-data-distributions/sssssp2j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-boxplots-visual-analysis-of-multiple-data-distributions/sssssp2j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-boxplots-visual-analysis-of-multiple-data-distributions/sssssp2j"/>
      <lastmod>2026-11-02T00:30:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-boxplots-visual-analysis-of-multiple-data-distributions/sssssp2j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-boxplots-visual-analysis-of-multiple-data-distributions/sssssp2j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-boxplots-visual-analysis-of-multiple-data-distributions/sssssp2j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-boxplots-visual-analysis-of-multiple-data-distributions/sssssp2j"/>
      <lastmod>2026-11-02T00:30:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solids-with-a-given-cross-section/sssssp2p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solids-with-a-given-cross-section/sssssp2p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solids-with-a-given-cross-section/sssssp2p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solids-with-a-given-cross-section/sssssp2p"/>
      <lastmod>2026-11-01T19:17:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solids-with-a-given-cross-section/sssssp2p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solids-with-a-given-cross-section/sssssp2p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solids-with-a-given-cross-section/sssssp2p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solids-with-a-given-cross-section/sssssp2p"/>
      <lastmod>2026-11-01T19:17:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-and-rotation-transformation-demo/sssssp2w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-and-rotation-transformation-demo/sssssp2w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-and-rotation-transformation-demo/sssssp2w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-and-rotation-transformation-demo/sssssp2w"/>
      <lastmod>2026-11-02T12:33:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-and-rotation-transformation-demo/sssssp2w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-and-rotation-transformation-demo/sssssp2w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-and-rotation-transformation-demo/sssssp2w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-and-rotation-transformation-demo/sssssp2w"/>
      <lastmod>2026-11-02T12:33:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/evaluating-functions-algebraically/sssssp26</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/evaluating-functions-algebraically/sssssp26"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/evaluating-functions-algebraically/sssssp26"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/evaluating-functions-algebraically/sssssp26"/>
      <lastmod>2026-11-01T19:30:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/evaluating-functions-algebraically/sssssp26</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/evaluating-functions-algebraically/sssssp26"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/evaluating-functions-algebraically/sssssp26"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/evaluating-functions-algebraically/sssssp26"/>
      <lastmod>2026-11-01T19:30:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sort-expressions-and-equations/sssssp2g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sort-expressions-and-equations/sssssp2g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sort-expressions-and-equations/sssssp2g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sort-expressions-and-equations/sssssp2g"/>
      <lastmod>2026-11-02T16:54:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sort-expressions-and-equations/sssssp2g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sort-expressions-and-equations/sssssp2g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sort-expressions-and-equations/sssssp2g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sort-expressions-and-equations/sssssp2g"/>
      <lastmod>2026-11-02T16:54:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-fractions-with-same-numerator-by-rohit-roy/sssssp29</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-fractions-with-same-numerator-by-rohit-roy/sssssp29"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-fractions-with-same-numerator-by-rohit-roy/sssssp29"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-fractions-with-same-numerator-by-rohit-roy/sssssp29"/>
      <lastmod>2026-11-01T23:37:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-fractions-with-same-numerator-by-rohit-roy/sssssp29</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-fractions-with-same-numerator-by-rohit-roy/sssssp29"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-fractions-with-same-numerator-by-rohit-roy/sssssp29"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-fractions-with-same-numerator-by-rohit-roy/sssssp29"/>
      <lastmod>2026-11-01T23:37:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/regular-pentagon-to-a-square-dissection/sssssp2e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-pentagon-to-a-square-dissection/sssssp2e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-pentagon-to-a-square-dissection/sssssp2e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-pentagon-to-a-square-dissection/sssssp2e"/>
      <lastmod>2026-11-02T06:17:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/regular-pentagon-to-a-square-dissection/sssssp2e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-pentagon-to-a-square-dissection/sssssp2e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-pentagon-to-a-square-dissection/sssssp2e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-pentagon-to-a-square-dissection/sssssp2e"/>
      <lastmod>2026-11-02T06:17:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-expansion-visualization/sssssp2v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-expansion-visualization/sssssp2v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-expansion-visualization/sssssp2v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-expansion-visualization/sssssp2v"/>
      <lastmod>2026-11-02T15:05:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-expansion-visualization/sssssp2v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-expansion-visualization/sssssp2v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-expansion-visualization/sssssp2v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-expansion-visualization/sssssp2v"/>
      <lastmod>2026-11-02T15:05:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-on-the-unit-circle/sssssp24</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-on-the-unit-circle/sssssp24"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-on-the-unit-circle/sssssp24"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-on-the-unit-circle/sssssp24"/>
      <lastmod>2026-11-02T16:47:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-on-the-unit-circle/sssssp24</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-on-the-unit-circle/sssssp24"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-on-the-unit-circle/sssssp24"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-on-the-unit-circle/sssssp24"/>
      <lastmod>2026-11-02T16:47:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/learning-how-to-use-geogebra-for-geometric-constructions/sssssp2l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/learning-how-to-use-geogebra-for-geometric-constructions/sssssp2l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/learning-how-to-use-geogebra-for-geometric-constructions/sssssp2l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/learning-how-to-use-geogebra-for-geometric-constructions/sssssp2l"/>
      <lastmod>2026-11-02T18:39:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/learning-how-to-use-geogebra-for-geometric-constructions/sssssp2l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/learning-how-to-use-geogebra-for-geometric-constructions/sssssp2l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/learning-how-to-use-geogebra-for-geometric-constructions/sssssp2l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/learning-how-to-use-geogebra-for-geometric-constructions/sssssp2l"/>
      <lastmod>2026-11-02T18:39:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-equation-word-problems-friends-and-money-mild/sssssp2y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equation-word-problems-friends-and-money-mild/sssssp2y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equation-word-problems-friends-and-money-mild/sssssp2y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equation-word-problems-friends-and-money-mild/sssssp2y"/>
      <lastmod>2026-11-02T13:55:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-equation-word-problems-friends-and-money-mild/sssssp2y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equation-word-problems-friends-and-money-mild/sssssp2y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equation-word-problems-friends-and-money-mild/sssssp2y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equation-word-problems-friends-and-money-mild/sssssp2y"/>
      <lastmod>2026-11-02T13:55:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-of-pythagoras-theorem-by-shearing/sssssp2a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-pythagoras-theorem-by-shearing/sssssp2a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-pythagoras-theorem-by-shearing/sssssp2a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-pythagoras-theorem-by-shearing/sssssp2a"/>
      <lastmod>2026-11-01T20:45:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-of-pythagoras-theorem-by-shearing/sssssp2a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-pythagoras-theorem-by-shearing/sssssp2a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-pythagoras-theorem-by-shearing/sssssp2a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-pythagoras-theorem-by-shearing/sssssp2a"/>
      <lastmod>2026-11-01T20:45:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/find-the-formula/sssssp2c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-the-formula/sssssp2c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-the-formula/sssssp2c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-the-formula/sssssp2c"/>
      <lastmod>2026-11-02T18:27:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/find-the-formula/sssssp2c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-the-formula/sssssp2c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-the-formula/sssssp2c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-the-formula/sssssp2c"/>
      <lastmod>2026-11-02T18:27:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/k-is-for-kite/sssssp2r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/k-is-for-kite/sssssp2r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/k-is-for-kite/sssssp2r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/k-is-for-kite/sssssp2r"/>
      <lastmod>2026-11-02T08:52:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/k-is-for-kite/sssssp2r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/k-is-for-kite/sssssp2r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/k-is-for-kite/sssssp2r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/k-is-for-kite/sssssp2r"/>
      <lastmod>2026-11-02T08:52:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/application-of-vectors-in-physics-force-composition-and-decomposition/sssssp2h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/application-of-vectors-in-physics-force-composition-and-decomposition/sssssp2h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/application-of-vectors-in-physics-force-composition-and-decomposition/sssssp2h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/application-of-vectors-in-physics-force-composition-and-decomposition/sssssp2h"/>
      <lastmod>2026-11-02T02:14:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/application-of-vectors-in-physics-force-composition-and-decomposition/sssssp2h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/application-of-vectors-in-physics-force-composition-and-decomposition/sssssp2h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/application-of-vectors-in-physics-force-composition-and-decomposition/sssssp2h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/application-of-vectors-in-physics-force-composition-and-decomposition/sssssp2h"/>
      <lastmod>2026-11-02T02:14:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/standard-gas-volume-calculation-considering-vapor-pressure/sssssp2t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-gas-volume-calculation-considering-vapor-pressure/sssssp2t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-gas-volume-calculation-considering-vapor-pressure/sssssp2t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-gas-volume-calculation-considering-vapor-pressure/sssssp2t"/>
      <lastmod>2026-11-02T02:51:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/standard-gas-volume-calculation-considering-vapor-pressure/sssssp2t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-gas-volume-calculation-considering-vapor-pressure/sssssp2t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-gas-volume-calculation-considering-vapor-pressure/sssssp2t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-gas-volume-calculation-considering-vapor-pressure/sssssp2t"/>
      <lastmod>2026-11-02T02:51:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/footprints-in-the-sand/sssssp2x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/footprints-in-the-sand/sssssp2x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/footprints-in-the-sand/sssssp2x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/footprints-in-the-sand/sssssp2x"/>
      <lastmod>2026-11-02T18:34:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/footprints-in-the-sand/sssssp2x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/footprints-in-the-sand/sssssp2x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/footprints-in-the-sand/sssssp2x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/footprints-in-the-sand/sssssp2x"/>
      <lastmod>2026-11-02T18:34:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-distribution-dynamic-view-window/sssssp2i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-dynamic-view-window/sssssp2i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-dynamic-view-window/sssssp2i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-dynamic-view-window/sssssp2i"/>
      <lastmod>2026-11-01T21:13:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-distribution-dynamic-view-window/sssssp2i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-dynamic-view-window/sssssp2i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-dynamic-view-window/sssssp2i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-dynamic-view-window/sssssp2i"/>
      <lastmod>2026-11-01T21:13:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/last-propositions-of-decagon/sssssp2o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/last-propositions-of-decagon/sssssp2o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/last-propositions-of-decagon/sssssp2o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/last-propositions-of-decagon/sssssp2o"/>
      <lastmod>2026-11-01T23:34:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/last-propositions-of-decagon/sssssp2o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/last-propositions-of-decagon/sssssp2o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/last-propositions-of-decagon/sssssp2o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/last-propositions-of-decagon/sssssp2o"/>
      <lastmod>2026-11-01T23:34:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-of-quadrilateral-abcd-90-degrees-cw-about-point-c/ssssspks</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-of-quadrilateral-abcd-90-degrees-cw-about-point-c/ssssspks"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-of-quadrilateral-abcd-90-degrees-cw-about-point-c/ssssspks"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-of-quadrilateral-abcd-90-degrees-cw-about-point-c/ssssspks"/>
      <lastmod>2026-11-02T10:50:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-of-quadrilateral-abcd-90-degrees-cw-about-point-c/ssssspks</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-of-quadrilateral-abcd-90-degrees-cw-about-point-c/ssssspks"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-of-quadrilateral-abcd-90-degrees-cw-about-point-c/ssssspks"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-of-quadrilateral-abcd-90-degrees-cw-about-point-c/ssssspks"/>
      <lastmod>2026-11-02T10:50:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-equations-in-two-variables-by-ekta-sachdeva/ssssspk7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-in-two-variables-by-ekta-sachdeva/ssssspk7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-in-two-variables-by-ekta-sachdeva/ssssspk7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-in-two-variables-by-ekta-sachdeva/ssssspk7"/>
      <lastmod>2026-11-02T18:05:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-equations-in-two-variables-by-ekta-sachdeva/ssssspk7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-in-two-variables-by-ekta-sachdeva/ssssspk7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-in-two-variables-by-ekta-sachdeva/ssssspk7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-in-two-variables-by-ekta-sachdeva/ssssspk7"/>
      <lastmod>2026-11-02T18:05:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/turned-tiles-translated/ssssspkn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/turned-tiles-translated/ssssspkn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/turned-tiles-translated/ssssspkn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/turned-tiles-translated/ssssspkn"/>
      <lastmod>2026-11-01T23:12:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/turned-tiles-translated/ssssspkn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/turned-tiles-translated/ssssspkn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/turned-tiles-translated/ssssspkn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/turned-tiles-translated/ssssspkn"/>
      <lastmod>2026-11-01T23:12:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-to-a-cubic-curve/ssssspk2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-to-a-cubic-curve/ssssspk2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-to-a-cubic-curve/ssssspk2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-to-a-cubic-curve/ssssspk2"/>
      <lastmod>2026-11-02T12:00:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-to-a-cubic-curve/ssssspk2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-to-a-cubic-curve/ssssspk2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-to-a-cubic-curve/ssssspk2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-to-a-cubic-curve/ssssspk2"/>
      <lastmod>2026-11-02T12:00:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/combination-of-prisms/ssssspkk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/combination-of-prisms/ssssspkk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/combination-of-prisms/ssssspkk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/combination-of-prisms/ssssspkk"/>
      <lastmod>2026-11-02T16:31:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/combination-of-prisms/ssssspkk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/combination-of-prisms/ssssspkk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/combination-of-prisms/ssssspkk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/combination-of-prisms/ssssspkk"/>
      <lastmod>2026-11-02T16:31:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-alternate-segment-theorem-demo/ssssspkz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-alternate-segment-theorem-demo/ssssspkz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-alternate-segment-theorem-demo/ssssspkz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-alternate-segment-theorem-demo/ssssspkz"/>
      <lastmod>2026-11-02T18:30:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-alternate-segment-theorem-demo/ssssspkz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-alternate-segment-theorem-demo/ssssspkz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-alternate-segment-theorem-demo/ssssspkz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-alternate-segment-theorem-demo/ssssspkz"/>
      <lastmod>2026-11-02T18:30:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/completing-the-square-geogebra-geometric-visualization/ssssspk0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/completing-the-square-geogebra-geometric-visualization/ssssspk0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/completing-the-square-geogebra-geometric-visualization/ssssspk0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/completing-the-square-geogebra-geometric-visualization/ssssspk0"/>
      <lastmod>2026-11-02T00:16:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/completing-the-square-geogebra-geometric-visualization/ssssspk0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/completing-the-square-geogebra-geometric-visualization/ssssspk0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/completing-the-square-geogebra-geometric-visualization/ssssspk0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/completing-the-square-geogebra-geometric-visualization/ssssspk0"/>
      <lastmod>2026-11-02T00:16:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/local-extrema-and-the-first-derivative/ssssspkd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/local-extrema-and-the-first-derivative/ssssspkd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/local-extrema-and-the-first-derivative/ssssspkd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/local-extrema-and-the-first-derivative/ssssspkd"/>
      <lastmod>2026-11-02T00:26:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/local-extrema-and-the-first-derivative/ssssspkd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/local-extrema-and-the-first-derivative/ssssspkd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/local-extrema-and-the-first-derivative/ssssspkd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/local-extrema-and-the-first-derivative/ssssspkd"/>
      <lastmod>2026-11-02T00:26:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/calculating-the-perimeter-of-a-rectangle/ssssspkf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-the-perimeter-of-a-rectangle/ssssspkf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-the-perimeter-of-a-rectangle/ssssspkf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-the-perimeter-of-a-rectangle/ssssspkf"/>
      <lastmod>2026-11-02T18:02:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/calculating-the-perimeter-of-a-rectangle/ssssspkf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-the-perimeter-of-a-rectangle/ssssspkf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-the-perimeter-of-a-rectangle/ssssspkf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-the-perimeter-of-a-rectangle/ssssspkf"/>
      <lastmod>2026-11-02T18:02:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equivalent-fractions-by-melissa/ssssspk8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-fractions-by-melissa/ssssspk8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-fractions-by-melissa/ssssspk8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-fractions-by-melissa/ssssspk8"/>
      <lastmod>2026-11-01T19:32:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equivalent-fractions-by-melissa/ssssspk8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-fractions-by-melissa/ssssspk8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-fractions-by-melissa/ssssspk8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-fractions-by-melissa/ssssspk8"/>
      <lastmod>2026-11-01T19:32:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circumcenter-and-circumcircle-construction-quiz/ssssspku</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumcenter-and-circumcircle-construction-quiz/ssssspku"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumcenter-and-circumcircle-construction-quiz/ssssspku"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumcenter-and-circumcircle-construction-quiz/ssssspku"/>
      <lastmod>2026-11-02T02:11:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circumcenter-and-circumcircle-construction-quiz/ssssspku</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumcenter-and-circumcircle-construction-quiz/ssssspku"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumcenter-and-circumcircle-construction-quiz/ssssspku"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumcenter-and-circumcircle-construction-quiz/ssssspku"/>
      <lastmod>2026-11-02T02:11:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/application-of-matrices-in-geometry-trapezoid-and-rectangle-problems/ssssspk5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/application-of-matrices-in-geometry-trapezoid-and-rectangle-problems/ssssspk5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/application-of-matrices-in-geometry-trapezoid-and-rectangle-problems/ssssspk5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/application-of-matrices-in-geometry-trapezoid-and-rectangle-problems/ssssspk5"/>
      <lastmod>2026-11-02T00:09:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/application-of-matrices-in-geometry-trapezoid-and-rectangle-problems/ssssspk5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/application-of-matrices-in-geometry-trapezoid-and-rectangle-problems/ssssspk5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/application-of-matrices-in-geometry-trapezoid-and-rectangle-problems/ssssspk5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/application-of-matrices-in-geometry-trapezoid-and-rectangle-problems/ssssspk5"/>
      <lastmod>2026-11-02T00:09:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cutting-the-cube/ssssspkb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cutting-the-cube/ssssspkb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cutting-the-cube/ssssspkb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cutting-the-cube/ssssspkb"/>
      <lastmod>2026-11-01T20:52:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cutting-the-cube/ssssspkb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cutting-the-cube/ssssspkb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cutting-the-cube/ssssspkb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cutting-the-cube/ssssspkb"/>
      <lastmod>2026-11-01T20:52:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-division-practice/ssssspk3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-division-practice/ssssspk3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-division-practice/ssssspk3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-division-practice/ssssspk3"/>
      <lastmod>2026-11-02T00:26:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-division-practice/ssssspk3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-division-practice/ssssspk3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-division-practice/ssssspk3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-division-practice/ssssspk3"/>
      <lastmod>2026-11-02T00:26:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-equation-curve-explorer/ssssspkq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-equation-curve-explorer/ssssspkq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-equation-curve-explorer/ssssspkq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-equation-curve-explorer/ssssspkq"/>
      <lastmod>2026-11-02T08:42:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-equation-curve-explorer/ssssspkq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-equation-curve-explorer/ssssspkq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-equation-curve-explorer/ssssspkq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-equation-curve-explorer/ssssspkq"/>
      <lastmod>2026-11-02T08:42:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/directed-numbers-addition-demo/ssssspk1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directed-numbers-addition-demo/ssssspk1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directed-numbers-addition-demo/ssssspk1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directed-numbers-addition-demo/ssssspk1"/>
      <lastmod>2026-11-01T19:26:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/directed-numbers-addition-demo/ssssspk1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directed-numbers-addition-demo/ssssspk1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directed-numbers-addition-demo/ssssspk1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directed-numbers-addition-demo/ssssspk1"/>
      <lastmod>2026-11-01T19:26:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/absolute-value-inequalities-demo/ssssspkm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/absolute-value-inequalities-demo/ssssspkm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/absolute-value-inequalities-demo/ssssspkm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/absolute-value-inequalities-demo/ssssspkm"/>
      <lastmod>2026-11-01T21:31:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/absolute-value-inequalities-demo/ssssspkm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/absolute-value-inequalities-demo/ssssspkm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/absolute-value-inequalities-demo/ssssspkm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/absolute-value-inequalities-demo/ssssspkm"/>
      <lastmod>2026-11-01T21:31:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/self-similarity-bouncing-ball-trace-example/ssssspkj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/self-similarity-bouncing-ball-trace-example/ssssspkj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/self-similarity-bouncing-ball-trace-example/ssssspkj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/self-similarity-bouncing-ball-trace-example/ssssspkj"/>
      <lastmod>2026-11-02T09:26:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/self-similarity-bouncing-ball-trace-example/ssssspkj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/self-similarity-bouncing-ball-trace-example/ssssspkj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/self-similarity-bouncing-ball-trace-example/ssssspkj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/self-similarity-bouncing-ball-trace-example/ssssspkj"/>
      <lastmod>2026-11-02T09:26:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-on-overlapping-ellipses/ssssspkp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-on-overlapping-ellipses/ssssspkp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-on-overlapping-ellipses/ssssspkp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-on-overlapping-ellipses/ssssspkp"/>
      <lastmod>2026-11-01T22:02:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-on-overlapping-ellipses/ssssspkp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-on-overlapping-ellipses/ssssspkp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-on-overlapping-ellipses/ssssspkp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-on-overlapping-ellipses/ssssspkp"/>
      <lastmod>2026-11-01T22:02:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/scalar-multiplication-vector-scaling-demonstration/ssssspkw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scalar-multiplication-vector-scaling-demonstration/ssssspkw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scalar-multiplication-vector-scaling-demonstration/ssssspkw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scalar-multiplication-vector-scaling-demonstration/ssssspkw"/>
      <lastmod>2026-11-02T00:55:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/scalar-multiplication-vector-scaling-demonstration/ssssspkw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scalar-multiplication-vector-scaling-demonstration/ssssspkw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scalar-multiplication-vector-scaling-demonstration/ssssspkw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scalar-multiplication-vector-scaling-demonstration/ssssspkw"/>
      <lastmod>2026-11-02T00:55:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-trigonometric-ratios-by-ken-arvidson/ssssspk6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-trigonometric-ratios-by-ken-arvidson/ssssspk6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-trigonometric-ratios-by-ken-arvidson/ssssspk6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-trigonometric-ratios-by-ken-arvidson/ssssspk6"/>
      <lastmod>2026-11-01T21:09:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-trigonometric-ratios-by-ken-arvidson/ssssspk6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-trigonometric-ratios-by-ken-arvidson/ssssspk6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-trigonometric-ratios-by-ken-arvidson/ssssspk6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-trigonometric-ratios-by-ken-arvidson/ssssspk6"/>
      <lastmod>2026-11-01T21:09:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/discovery-of-segment-addition-postulate/ssssspkg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discovery-of-segment-addition-postulate/ssssspkg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discovery-of-segment-addition-postulate/ssssspkg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discovery-of-segment-addition-postulate/ssssspkg"/>
      <lastmod>2026-11-02T18:05:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/discovery-of-segment-addition-postulate/ssssspkg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discovery-of-segment-addition-postulate/ssssspkg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discovery-of-segment-addition-postulate/ssssspkg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discovery-of-segment-addition-postulate/ssssspkg"/>
      <lastmod>2026-11-02T18:05:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sum-of-three-squares-equals-a-square/ssssspk9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-three-squares-equals-a-square/ssssspk9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-three-squares-equals-a-square/ssssspk9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-three-squares-equals-a-square/ssssspk9"/>
      <lastmod>2026-11-01T21:33:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sum-of-three-squares-equals-a-square/ssssspk9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-three-squares-equals-a-square/ssssspk9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-three-squares-equals-a-square/ssssspk9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-three-squares-equals-a-square/ssssspk9"/>
      <lastmod>2026-11-01T21:33:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/second-derivative-exploration/ssssspke</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/second-derivative-exploration/ssssspke"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/second-derivative-exploration/ssssspke"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/second-derivative-exploration/ssssspke"/>
      <lastmod>2026-11-02T13:49:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/second-derivative-exploration/ssssspke</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/second-derivative-exploration/ssssspke"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/second-derivative-exploration/ssssspke"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/second-derivative-exploration/ssssspke"/>
      <lastmod>2026-11-02T13:49:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-ratios-in-a-unit-circle/ssssspkv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-ratios-in-a-unit-circle/ssssspkv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-ratios-in-a-unit-circle/ssssspkv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-ratios-in-a-unit-circle/ssssspkv"/>
      <lastmod>2026-11-02T17:04:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-ratios-in-a-unit-circle/ssssspkv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-ratios-in-a-unit-circle/ssssspkv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-ratios-in-a-unit-circle/ssssspkv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-ratios-in-a-unit-circle/ssssspkv"/>
      <lastmod>2026-11-02T17:04:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/projection-and-scaling-practice/ssssspk4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/projection-and-scaling-practice/ssssspk4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/projection-and-scaling-practice/ssssspk4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/projection-and-scaling-practice/ssssspk4"/>
      <lastmod>2026-11-02T02:11:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/projection-and-scaling-practice/ssssspk4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/projection-and-scaling-practice/ssssspk4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/projection-and-scaling-practice/ssssspk4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/projection-and-scaling-practice/ssssspk4"/>
      <lastmod>2026-11-02T02:11:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflect-a-quadrilateral/ssssspkl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflect-a-quadrilateral/ssssspkl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflect-a-quadrilateral/ssssspkl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflect-a-quadrilateral/ssssspkl"/>
      <lastmod>2026-11-01T23:14:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflect-a-quadrilateral/ssssspkl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflect-a-quadrilateral/ssssspkl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflect-a-quadrilateral/ssssspkl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflect-a-quadrilateral/ssssspkl"/>
      <lastmod>2026-11-01T23:14:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotational-symmetry-of-rhombus/ssssspky</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-rhombus/ssssspky"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-of-rhombus/ssssspky"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-rhombus/ssssspky"/>
      <lastmod>2026-11-01T23:38:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotational-symmetry-of-rhombus/ssssspky</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-rhombus/ssssspky"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-of-rhombus/ssssspky"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-rhombus/ssssspky"/>
      <lastmod>2026-11-01T23:38:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-area-and-partial-volume-in-2d-by-ron-van-den-burg/ssssspka</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-area-and-partial-volume-in-2d-by-ron-van-den-burg/ssssspka"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-area-and-partial-volume-in-2d-by-ron-van-den-burg/ssssspka"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-area-and-partial-volume-in-2d-by-ron-van-den-burg/ssssspka"/>
      <lastmod>2026-11-02T02:51:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-area-and-partial-volume-in-2d-by-ron-van-den-burg/ssssspka</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-area-and-partial-volume-in-2d-by-ron-van-den-burg/ssssspka"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-area-and-partial-volume-in-2d-by-ron-van-den-burg/ssssspka"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-area-and-partial-volume-in-2d-by-ron-van-den-burg/ssssspka"/>
      <lastmod>2026-11-02T02:51:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/concept-of-gradient-slope-of-a-line/ssssspkc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/concept-of-gradient-slope-of-a-line/ssssspkc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/concept-of-gradient-slope-of-a-line/ssssspkc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/concept-of-gradient-slope-of-a-line/ssssspkc"/>
      <lastmod>2026-11-02T17:48:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/concept-of-gradient-slope-of-a-line/ssssspkc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/concept-of-gradient-slope-of-a-line/ssssspkc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/concept-of-gradient-slope-of-a-line/ssssspkc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/concept-of-gradient-slope-of-a-line/ssssspkc"/>
      <lastmod>2026-11-02T17:48:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/find-the-volume-of-a-rectangular-prism/ssssspkr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-the-volume-of-a-rectangular-prism/ssssspkr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-the-volume-of-a-rectangular-prism/ssssspkr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-the-volume-of-a-rectangular-prism/ssssspkr"/>
      <lastmod>2026-11-02T13:14:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/find-the-volume-of-a-rectangular-prism/ssssspkr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-the-volume-of-a-rectangular-prism/ssssspkr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-the-volume-of-a-rectangular-prism/ssssspkr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-the-volume-of-a-rectangular-prism/ssssspkr"/>
      <lastmod>2026-11-02T13:14:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drag-3-points-to-define-a-line/ssssspkh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drag-3-points-to-define-a-line/ssssspkh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drag-3-points-to-define-a-line/ssssspkh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drag-3-points-to-define-a-line/ssssspkh"/>
      <lastmod>2026-11-02T17:01:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drag-3-points-to-define-a-line/ssssspkh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drag-3-points-to-define-a-line/ssssspkh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drag-3-points-to-define-a-line/ssssspkh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drag-3-points-to-define-a-line/ssssspkh"/>
      <lastmod>2026-11-02T17:01:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/us-cases-and-deaths-of-covid-19-since-3-15-2020/ssssspkt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/us-cases-and-deaths-of-covid-19-since-3-15-2020/ssssspkt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/us-cases-and-deaths-of-covid-19-since-3-15-2020/ssssspkt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/us-cases-and-deaths-of-covid-19-since-3-15-2020/ssssspkt"/>
      <lastmod>2026-11-01T19:11:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/us-cases-and-deaths-of-covid-19-since-3-15-2020/ssssspkt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/us-cases-and-deaths-of-covid-19-since-3-15-2020/ssssspkt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/us-cases-and-deaths-of-covid-19-since-3-15-2020/ssssspkt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/us-cases-and-deaths-of-covid-19-since-3-15-2020/ssssspkt"/>
      <lastmod>2026-11-01T19:11:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cmy-color-model-demonstration/ssssspkx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cmy-color-model-demonstration/ssssspkx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cmy-color-model-demonstration/ssssspkx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cmy-color-model-demonstration/ssssspkx"/>
      <lastmod>2026-11-02T16:47:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cmy-color-model-demonstration/ssssspkx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cmy-color-model-demonstration/ssssspkx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cmy-color-model-demonstration/ssssspkx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cmy-color-model-demonstration/ssssspkx"/>
      <lastmod>2026-11-02T16:47:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shifting-a-parabola-dynamic-visualization-of-vertex-and-equation-changes/ssssspki</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shifting-a-parabola-dynamic-visualization-of-vertex-and-equation-changes/ssssspki"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shifting-a-parabola-dynamic-visualization-of-vertex-and-equation-changes/ssssspki"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shifting-a-parabola-dynamic-visualization-of-vertex-and-equation-changes/ssssspki"/>
      <lastmod>2026-11-02T18:00:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shifting-a-parabola-dynamic-visualization-of-vertex-and-equation-changes/ssssspki</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shifting-a-parabola-dynamic-visualization-of-vertex-and-equation-changes/ssssspki"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shifting-a-parabola-dynamic-visualization-of-vertex-and-equation-changes/ssssspki"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shifting-a-parabola-dynamic-visualization-of-vertex-and-equation-changes/ssssspki"/>
      <lastmod>2026-11-02T18:00:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reasoning-to-find-area-decomposing-and-rearranging-polygons-im-6-1-3-lesson/ssssspko</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reasoning-to-find-area-decomposing-and-rearranging-polygons-im-6-1-3-lesson/ssssspko"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reasoning-to-find-area-decomposing-and-rearranging-polygons-im-6-1-3-lesson/ssssspko"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reasoning-to-find-area-decomposing-and-rearranging-polygons-im-6-1-3-lesson/ssssspko"/>
      <lastmod>2026-11-02T16:28:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reasoning-to-find-area-decomposing-and-rearranging-polygons-im-6-1-3-lesson/ssssspko</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reasoning-to-find-area-decomposing-and-rearranging-polygons-im-6-1-3-lesson/ssssspko"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reasoning-to-find-area-decomposing-and-rearranging-polygons-im-6-1-3-lesson/ssssspko"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reasoning-to-find-area-decomposing-and-rearranging-polygons-im-6-1-3-lesson/ssssspko"/>
      <lastmod>2026-11-02T16:28:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spiky-ball-model-2d-time-dimension/ssssspzs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiky-ball-model-2d-time-dimension/ssssspzs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiky-ball-model-2d-time-dimension/ssssspzs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiky-ball-model-2d-time-dimension/ssssspzs"/>
      <lastmod>2026-11-01T23:48:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spiky-ball-model-2d-time-dimension/ssssspzs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiky-ball-model-2d-time-dimension/ssssspzs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiky-ball-model-2d-time-dimension/ssssspzs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiky-ball-model-2d-time-dimension/ssssspzs"/>
      <lastmod>2026-11-01T23:48:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/thales-theorem-dynamic-demonstration-sequel/ssssspz7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/thales-theorem-dynamic-demonstration-sequel/ssssspz7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/thales-theorem-dynamic-demonstration-sequel/ssssspz7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/thales-theorem-dynamic-demonstration-sequel/ssssspz7"/>
      <lastmod>2026-11-02T17:07:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/thales-theorem-dynamic-demonstration-sequel/ssssspz7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/thales-theorem-dynamic-demonstration-sequel/ssssspz7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/thales-theorem-dynamic-demonstration-sequel/ssssspz7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/thales-theorem-dynamic-demonstration-sequel/ssssspz7"/>
      <lastmod>2026-11-02T17:07:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-similarity-from-a-variable-parts-perspective-by-sybilla-beckmann/ssssspzn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-similarity-from-a-variable-parts-perspective-by-sybilla-beckmann/ssssspzn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-similarity-from-a-variable-parts-perspective-by-sybilla-beckmann/ssssspzn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-similarity-from-a-variable-parts-perspective-by-sybilla-beckmann/ssssspzn"/>
      <lastmod>2026-11-01T23:54:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-similarity-from-a-variable-parts-perspective-by-sybilla-beckmann/ssssspzn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-similarity-from-a-variable-parts-perspective-by-sybilla-beckmann/ssssspzn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-similarity-from-a-variable-parts-perspective-by-sybilla-beckmann/ssssspzn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-similarity-from-a-variable-parts-perspective-by-sybilla-beckmann/ssssspzn"/>
      <lastmod>2026-11-01T23:54:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/effect-of-parameters-on-sine-cosine-and-tangent-curves/ssssspz2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/effect-of-parameters-on-sine-cosine-and-tangent-curves/ssssspz2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/effect-of-parameters-on-sine-cosine-and-tangent-curves/ssssspz2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/effect-of-parameters-on-sine-cosine-and-tangent-curves/ssssspz2"/>
      <lastmod>2026-11-01T19:16:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/effect-of-parameters-on-sine-cosine-and-tangent-curves/ssssspz2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/effect-of-parameters-on-sine-cosine-and-tangent-curves/ssssspz2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/effect-of-parameters-on-sine-cosine-and-tangent-curves/ssssspz2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/effect-of-parameters-on-sine-cosine-and-tangent-curves/ssssspz2"/>
      <lastmod>2026-11-01T19:16:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/random-line-generator/ssssspzk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-line-generator/ssssspzk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-line-generator/ssssspzk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-line-generator/ssssspzk"/>
      <lastmod>2026-11-01T23:35:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/random-line-generator/ssssspzk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-line-generator/ssssspzk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-line-generator/ssssspzk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-line-generator/ssssspzk"/>
      <lastmod>2026-11-01T23:35:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sums-to-100-pairs/ssssspzz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sums-to-100-pairs/ssssspzz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sums-to-100-pairs/ssssspzz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sums-to-100-pairs/ssssspzz"/>
      <lastmod>2026-11-02T18:45:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sums-to-100-pairs/ssssspzz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sums-to-100-pairs/ssssspzz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sums-to-100-pairs/ssssspzz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sums-to-100-pairs/ssssspzz"/>
      <lastmod>2026-11-02T18:45:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sele-2012-72-vector-statistics-probability-and-pythagorean-geometry/ssssspz0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sele-2012-72-vector-statistics-probability-and-pythagorean-geometry/ssssspz0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sele-2012-72-vector-statistics-probability-and-pythagorean-geometry/ssssspz0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sele-2012-72-vector-statistics-probability-and-pythagorean-geometry/ssssspz0"/>
      <lastmod>2026-11-01T19:18:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sele-2012-72-vector-statistics-probability-and-pythagorean-geometry/ssssspz0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sele-2012-72-vector-statistics-probability-and-pythagorean-geometry/ssssspz0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sele-2012-72-vector-statistics-probability-and-pythagorean-geometry/ssssspz0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sele-2012-72-vector-statistics-probability-and-pythagorean-geometry/ssssspz0"/>
      <lastmod>2026-11-01T19:18:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-tangent-and-unit-normal-vectors/ssssspzd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-tangent-and-unit-normal-vectors/ssssspzd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-tangent-and-unit-normal-vectors/ssssspzd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-tangent-and-unit-normal-vectors/ssssspzd"/>
      <lastmod>2026-11-02T17:57:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-tangent-and-unit-normal-vectors/ssssspzd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-tangent-and-unit-normal-vectors/ssssspzd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-tangent-and-unit-normal-vectors/ssssspzd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-tangent-and-unit-normal-vectors/ssssspzd"/>
      <lastmod>2026-11-02T17:57:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/focus-directrix-property-demo/ssssspzf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/focus-directrix-property-demo/ssssspzf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/focus-directrix-property-demo/ssssspzf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/focus-directrix-property-demo/ssssspzf"/>
      <lastmod>2026-11-02T18:36:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/focus-directrix-property-demo/ssssspzf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/focus-directrix-property-demo/ssssspzf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/focus-directrix-property-demo/ssssspzf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/focus-directrix-property-demo/ssssspzf"/>
      <lastmod>2026-11-02T18:36:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translated-spirals/ssssspz8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translated-spirals/ssssspz8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translated-spirals/ssssspz8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translated-spirals/ssssspz8"/>
      <lastmod>2026-11-02T16:42:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translated-spirals/ssssspz8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translated-spirals/ssssspz8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translated-spirals/ssssspz8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translated-spirals/ssssspz8"/>
      <lastmod>2026-11-02T16:42:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/positions-on-the-number-line-with-fractions-and-decimals/ssssspzu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/positions-on-the-number-line-with-fractions-and-decimals/ssssspzu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/positions-on-the-number-line-with-fractions-and-decimals/ssssspzu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/positions-on-the-number-line-with-fractions-and-decimals/ssssspzu"/>
      <lastmod>2026-11-01T21:10:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/positions-on-the-number-line-with-fractions-and-decimals/ssssspzu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/positions-on-the-number-line-with-fractions-and-decimals/ssssspzu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/positions-on-the-number-line-with-fractions-and-decimals/ssssspzu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/positions-on-the-number-line-with-fractions-and-decimals/ssssspzu"/>
      <lastmod>2026-11-01T21:10:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-bisector-and-angle-addition-postulate/ssssspz5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-bisector-and-angle-addition-postulate/ssssspz5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-bisector-and-angle-addition-postulate/ssssspz5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-bisector-and-angle-addition-postulate/ssssspz5"/>
      <lastmod>2026-11-02T00:29:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-bisector-and-angle-addition-postulate/ssssspz5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-bisector-and-angle-addition-postulate/ssssspz5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-bisector-and-angle-addition-postulate/ssssspz5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-bisector-and-angle-addition-postulate/ssssspz5"/>
      <lastmod>2026-11-02T00:29:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-binomial-products-with-algebra-tiles/ssssspzb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-binomial-products-with-algebra-tiles/ssssspzb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-binomial-products-with-algebra-tiles/ssssspzb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-binomial-products-with-algebra-tiles/ssssspzb"/>
      <lastmod>2026-11-01T21:38:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-binomial-products-with-algebra-tiles/ssssspzb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-binomial-products-with-algebra-tiles/ssssspzb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-binomial-products-with-algebra-tiles/ssssspzb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-binomial-products-with-algebra-tiles/ssssspzb"/>
      <lastmod>2026-11-01T21:38:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-and-derivative-basics-demo/ssssspz3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-and-derivative-basics-demo/ssssspz3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-and-derivative-basics-demo/ssssspz3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-and-derivative-basics-demo/ssssspz3"/>
      <lastmod>2026-11-01T21:45:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-and-derivative-basics-demo/ssssspz3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-and-derivative-basics-demo/ssssspz3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-and-derivative-basics-demo/ssssspz3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-and-derivative-basics-demo/ssssspz3"/>
      <lastmod>2026-11-01T21:45:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/example-qf-inv-3i/ssssspzq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/example-qf-inv-3i/ssssspzq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/example-qf-inv-3i/ssssspzq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/example-qf-inv-3i/ssssspzq"/>
      <lastmod>2026-11-02T00:06:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/example-qf-inv-3i/ssssspzq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/example-qf-inv-3i/ssssspzq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/example-qf-inv-3i/ssssspzq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/example-qf-inv-3i/ssssspzq"/>
      <lastmod>2026-11-02T00:06:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/p3-triangle-construction-3-grid-check-answers-one-side-fixed-advanced/ssssspz1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p3-triangle-construction-3-grid-check-answers-one-side-fixed-advanced/ssssspz1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p3-triangle-construction-3-grid-check-answers-one-side-fixed-advanced/ssssspz1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p3-triangle-construction-3-grid-check-answers-one-side-fixed-advanced/ssssspz1"/>
      <lastmod>2026-11-01T19:23:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/p3-triangle-construction-3-grid-check-answers-one-side-fixed-advanced/ssssspz1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p3-triangle-construction-3-grid-check-answers-one-side-fixed-advanced/ssssspz1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p3-triangle-construction-3-grid-check-answers-one-side-fixed-advanced/ssssspz1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p3-triangle-construction-3-grid-check-answers-one-side-fixed-advanced/ssssspz1"/>
      <lastmod>2026-11-01T19:23:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/corona3blueonebrown-dynamic-simulation-of-the-sir-epidemic-model/ssssspzm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/corona3blueonebrown-dynamic-simulation-of-the-sir-epidemic-model/ssssspzm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/corona3blueonebrown-dynamic-simulation-of-the-sir-epidemic-model/ssssspzm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/corona3blueonebrown-dynamic-simulation-of-the-sir-epidemic-model/ssssspzm"/>
      <lastmod>2026-11-01T18:59:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/corona3blueonebrown-dynamic-simulation-of-the-sir-epidemic-model/ssssspzm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/corona3blueonebrown-dynamic-simulation-of-the-sir-epidemic-model/ssssspzm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/corona3blueonebrown-dynamic-simulation-of-the-sir-epidemic-model/ssssspzm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/corona3blueonebrown-dynamic-simulation-of-the-sir-epidemic-model/ssssspzm"/>
      <lastmod>2026-11-01T18:59:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spirographic-curves-2/ssssspzj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spirographic-curves-2/ssssspzj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spirographic-curves-2/ssssspzj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spirographic-curves-2/ssssspzj"/>
      <lastmod>2026-11-01T19:26:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spirographic-curves-2/ssssspzj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spirographic-curves-2/ssssspzj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spirographic-curves-2/ssssspzj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spirographic-curves-2/ssssspzj"/>
      <lastmod>2026-11-01T19:26:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wrapping-real-numbers-around-the-unit-circle/ssssspzp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wrapping-real-numbers-around-the-unit-circle/ssssspzp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wrapping-real-numbers-around-the-unit-circle/ssssspzp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wrapping-real-numbers-around-the-unit-circle/ssssspzp"/>
      <lastmod>2026-11-02T18:23:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wrapping-real-numbers-around-the-unit-circle/ssssspzp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wrapping-real-numbers-around-the-unit-circle/ssssspzp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wrapping-real-numbers-around-the-unit-circle/ssssspzp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wrapping-real-numbers-around-the-unit-circle/ssssspzp"/>
      <lastmod>2026-11-02T18:23:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-right-triangles/ssssspzw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-right-triangles/ssssspzw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-right-triangles/ssssspzw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-right-triangles/ssssspzw"/>
      <lastmod>2026-11-01T21:11:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-right-triangles/ssssspzw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-right-triangles/ssssspzw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-right-triangles/ssssspzw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-right-triangles/ssssspzw"/>
      <lastmod>2026-11-01T21:11:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-models-for-improper-fractions/ssssspz6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-models-for-improper-fractions/ssssspz6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-models-for-improper-fractions/ssssspz6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-models-for-improper-fractions/ssssspz6"/>
      <lastmod>2026-11-01T19:01:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-models-for-improper-fractions/ssssspz6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-models-for-improper-fractions/ssssspz6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-models-for-improper-fractions/ssssspz6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-models-for-improper-fractions/ssssspz6"/>
      <lastmod>2026-11-01T19:01:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wurzeralm-workshop-group-activity-tessellation/ssssspzg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wurzeralm-workshop-group-activity-tessellation/ssssspzg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wurzeralm-workshop-group-activity-tessellation/ssssspzg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wurzeralm-workshop-group-activity-tessellation/ssssspzg"/>
      <lastmod>2026-11-01T21:45:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wurzeralm-workshop-group-activity-tessellation/ssssspzg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wurzeralm-workshop-group-activity-tessellation/ssssspzg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wurzeralm-workshop-group-activity-tessellation/ssssspzg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wurzeralm-workshop-group-activity-tessellation/ssssspzg"/>
      <lastmod>2026-11-01T21:45:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/15-point-circle/ssssspz9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/15-point-circle/ssssspz9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/15-point-circle/ssssspz9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/15-point-circle/ssssspz9"/>
      <lastmod>2026-11-02T13:15:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/15-point-circle/ssssspz9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/15-point-circle/ssssspz9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/15-point-circle/ssssspz9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/15-point-circle/ssssspz9"/>
      <lastmod>2026-11-02T13:15:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-figures-and-ratios-in-geometry/ssssspze</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-figures-and-ratios-in-geometry/ssssspze"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-figures-and-ratios-in-geometry/ssssspze"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-figures-and-ratios-in-geometry/ssssspze"/>
      <lastmod>2026-11-02T17:39:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-figures-and-ratios-in-geometry/ssssspze</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-figures-and-ratios-in-geometry/ssssspze"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-figures-and-ratios-in-geometry/ssssspze"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-figures-and-ratios-in-geometry/ssssspze"/>
      <lastmod>2026-11-02T17:39:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-isometry-proof/ssssspzv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-isometry-proof/ssssspzv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-isometry-proof/ssssspzv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-isometry-proof/ssssspzv"/>
      <lastmod>2026-11-02T17:49:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-isometry-proof/ssssspzv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-isometry-proof/ssssspzv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-isometry-proof/ssssspzv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-isometry-proof/ssssspzv"/>
      <lastmod>2026-11-02T17:49:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/average-chord-length-in-a-unit-circle/ssssspz4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/average-chord-length-in-a-unit-circle/ssssspz4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/average-chord-length-in-a-unit-circle/ssssspz4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/average-chord-length-in-a-unit-circle/ssssspz4"/>
      <lastmod>2026-11-02T14:56:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/average-chord-length-in-a-unit-circle/ssssspz4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/average-chord-length-in-a-unit-circle/ssssspz4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/average-chord-length-in-a-unit-circle/ssssspz4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/average-chord-length-in-a-unit-circle/ssssspz4"/>
      <lastmod>2026-11-02T14:56:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hypothesis-testing-example-page-105-example-4/ssssspzl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hypothesis-testing-example-page-105-example-4/ssssspzl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hypothesis-testing-example-page-105-example-4/ssssspzl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hypothesis-testing-example-page-105-example-4/ssssspzl"/>
      <lastmod>2026-11-02T18:12:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hypothesis-testing-example-page-105-example-4/ssssspzl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hypothesis-testing-example-page-105-example-4/ssssspzl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hypothesis-testing-example-page-105-example-4/ssssspzl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hypothesis-testing-example-page-105-example-4/ssssspzl"/>
      <lastmod>2026-11-02T18:12:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadrilateral-basics/ssssspzy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-basics/ssssspzy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-basics/ssssspzy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-basics/ssssspzy"/>
      <lastmod>2026-11-02T02:13:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadrilateral-basics/ssssspzy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-basics/ssssspzy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-basics/ssssspzy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-basics/ssssspzy"/>
      <lastmod>2026-11-02T02:13:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/long-division-of-cubic-functions/ssssspza</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/long-division-of-cubic-functions/ssssspza"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/long-division-of-cubic-functions/ssssspza"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/long-division-of-cubic-functions/ssssspza"/>
      <lastmod>2026-11-01T20:43:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/long-division-of-cubic-functions/ssssspza</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/long-division-of-cubic-functions/ssssspza"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/long-division-of-cubic-functions/ssssspza"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/long-division-of-cubic-functions/ssssspza"/>
      <lastmod>2026-11-01T20:43:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-two-cylinders-by-jose-manuel-arranz/ssssspzc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-two-cylinders-by-jose-manuel-arranz/ssssspzc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-two-cylinders-by-jose-manuel-arranz/ssssspzc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-two-cylinders-by-jose-manuel-arranz/ssssspzc"/>
      <lastmod>2026-11-02T12:26:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-two-cylinders-by-jose-manuel-arranz/ssssspzc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-two-cylinders-by-jose-manuel-arranz/ssssspzc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-two-cylinders-by-jose-manuel-arranz/ssssspzc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-two-cylinders-by-jose-manuel-arranz/ssssspzc"/>
      <lastmod>2026-11-02T12:26:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-between-ness-with-rational-numbers/ssssspzr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-between-ness-with-rational-numbers/ssssspzr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-between-ness-with-rational-numbers/ssssspzr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-between-ness-with-rational-numbers/ssssspzr"/>
      <lastmod>2026-11-02T17:55:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-between-ness-with-rational-numbers/ssssspzr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-between-ness-with-rational-numbers/ssssspzr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-between-ness-with-rational-numbers/ssssspzr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-between-ness-with-rational-numbers/ssssspzr"/>
      <lastmod>2026-11-02T17:55:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-multiplication-demo/ssssspzh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-multiplication-demo/ssssspzh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-multiplication-demo/ssssspzh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-multiplication-demo/ssssspzh"/>
      <lastmod>2026-11-02T18:52:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-multiplication-demo/ssssspzh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-multiplication-demo/ssssspzh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-multiplication-demo/ssssspzh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-multiplication-demo/ssssspzh"/>
      <lastmod>2026-11-02T18:52:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/x-y-scale-ellipse/ssssspzt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/x-y-scale-ellipse/ssssspzt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/x-y-scale-ellipse/ssssspzt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/x-y-scale-ellipse/ssssspzt"/>
      <lastmod>2026-11-02T02:26:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/x-y-scale-ellipse/ssssspzt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/x-y-scale-ellipse/ssssspzt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/x-y-scale-ellipse/ssssspzt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/x-y-scale-ellipse/ssssspzt"/>
      <lastmod>2026-11-02T02:26:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/create-a-3d-surface-of-revolution-by-rotating-any-2d-figure-about-any-line/ssssspzx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-a-3d-surface-of-revolution-by-rotating-any-2d-figure-about-any-line/ssssspzx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-a-3d-surface-of-revolution-by-rotating-any-2d-figure-about-any-line/ssssspzx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-a-3d-surface-of-revolution-by-rotating-any-2d-figure-about-any-line/ssssspzx"/>
      <lastmod>2026-11-01T21:41:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/create-a-3d-surface-of-revolution-by-rotating-any-2d-figure-about-any-line/ssssspzx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-a-3d-surface-of-revolution-by-rotating-any-2d-figure-about-any-line/ssssspzx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-a-3d-surface-of-revolution-by-rotating-any-2d-figure-about-any-line/ssssspzx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-a-3d-surface-of-revolution-by-rotating-any-2d-figure-about-any-line/ssssspzx"/>
      <lastmod>2026-11-01T21:41:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-a-volume-of-revolution/ssssspzi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-a-volume-of-revolution/ssssspzi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-a-volume-of-revolution/ssssspzi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-a-volume-of-revolution/ssssspzi"/>
      <lastmod>2026-11-02T14:55:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-a-volume-of-revolution/ssssspzi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-a-volume-of-revolution/ssssspzi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-a-volume-of-revolution/ssssspzi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-a-volume-of-revolution/ssssspzi"/>
      <lastmod>2026-11-02T14:55:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fluxicube-animation/ssssspzo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fluxicube-animation/ssssspzo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fluxicube-animation/ssssspzo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fluxicube-animation/ssssspzo"/>
      <lastmod>2026-11-01T20:35:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fluxicube-animation/ssssspzo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fluxicube-animation/ssssspzo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fluxicube-animation/ssssspzo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fluxicube-animation/ssssspzo"/>
      <lastmod>2026-11-01T20:35:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pattern-blocks-geometry-demo/sssssp0s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pattern-blocks-geometry-demo/sssssp0s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pattern-blocks-geometry-demo/sssssp0s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pattern-blocks-geometry-demo/sssssp0s"/>
      <lastmod>2026-11-01T21:35:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pattern-blocks-geometry-demo/sssssp0s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pattern-blocks-geometry-demo/sssssp0s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pattern-blocks-geometry-demo/sssssp0s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pattern-blocks-geometry-demo/sssssp0s"/>
      <lastmod>2026-11-01T21:35:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-animation/sssssp07</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-animation/sssssp07"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-animation/sssssp07"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-animation/sssssp07"/>
      <lastmod>2026-11-02T02:27:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-animation/sssssp07</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-animation/sssssp07"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-animation/sssssp07"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-animation/sssssp07"/>
      <lastmod>2026-11-02T02:27:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-rotation-about-the-origin/sssssp0n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-rotation-about-the-origin/sssssp0n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-rotation-about-the-origin/sssssp0n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-rotation-about-the-origin/sssssp0n"/>
      <lastmod>2026-11-01T21:23:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-rotation-about-the-origin/sssssp0n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-rotation-about-the-origin/sssssp0n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-rotation-about-the-origin/sssssp0n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-rotation-about-the-origin/sssssp0n"/>
      <lastmod>2026-11-01T21:23:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bifurcation-diagram-construction/sssssp02</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bifurcation-diagram-construction/sssssp02"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bifurcation-diagram-construction/sssssp02"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bifurcation-diagram-construction/sssssp02"/>
      <lastmod>2026-11-02T18:06:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bifurcation-diagram-construction/sssssp02</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bifurcation-diagram-construction/sssssp02"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bifurcation-diagram-construction/sssssp02"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bifurcation-diagram-construction/sssssp02"/>
      <lastmod>2026-11-02T18:06:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exercise-on-the-rate-of-change-of-a-linear-function/sssssp0k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-on-the-rate-of-change-of-a-linear-function/sssssp0k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-on-the-rate-of-change-of-a-linear-function/sssssp0k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-on-the-rate-of-change-of-a-linear-function/sssssp0k"/>
      <lastmod>2026-11-02T18:51:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exercise-on-the-rate-of-change-of-a-linear-function/sssssp0k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-on-the-rate-of-change-of-a-linear-function/sssssp0k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-on-the-rate-of-change-of-a-linear-function/sssssp0k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-on-the-rate-of-change-of-a-linear-function/sssssp0k"/>
      <lastmod>2026-11-02T18:51:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/addition-of-integers-by-a-r-a-y-a/sssssp0z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-of-integers-by-a-r-a-y-a/sssssp0z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-of-integers-by-a-r-a-y-a/sssssp0z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-of-integers-by-a-r-a-y-a/sssssp0z"/>
      <lastmod>2026-11-02T00:21:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/addition-of-integers-by-a-r-a-y-a/sssssp0z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-of-integers-by-a-r-a-y-a/sssssp0z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-of-integers-by-a-r-a-y-a/sssssp0z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-of-integers-by-a-r-a-y-a/sssssp0z"/>
      <lastmod>2026-11-02T00:21:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/effect-of-coefficient-of-x-in-quadratic-functions/sssssp00</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/effect-of-coefficient-of-x-in-quadratic-functions/sssssp00"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/effect-of-coefficient-of-x-in-quadratic-functions/sssssp00"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/effect-of-coefficient-of-x-in-quadratic-functions/sssssp00"/>
      <lastmod>2026-11-02T18:14:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/effect-of-coefficient-of-x-in-quadratic-functions/sssssp00</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/effect-of-coefficient-of-x-in-quadratic-functions/sssssp00"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/effect-of-coefficient-of-x-in-quadratic-functions/sssssp00"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/effect-of-coefficient-of-x-in-quadratic-functions/sssssp00"/>
      <lastmod>2026-11-02T18:14:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-addition-and-subtraction-demo-by-auston-b-cron/sssssp0d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-and-subtraction-demo-by-auston-b-cron/sssssp0d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-and-subtraction-demo-by-auston-b-cron/sssssp0d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-and-subtraction-demo-by-auston-b-cron/sssssp0d"/>
      <lastmod>2026-11-02T16:51:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-addition-and-subtraction-demo-by-auston-b-cron/sssssp0d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-and-subtraction-demo-by-auston-b-cron/sssssp0d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-and-subtraction-demo-by-auston-b-cron/sssssp0d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-and-subtraction-demo-by-auston-b-cron/sssssp0d"/>
      <lastmod>2026-11-02T16:51:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflections-and-geometric-transformations/sssssp0f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-and-geometric-transformations/sssssp0f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-and-geometric-transformations/sssssp0f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-and-geometric-transformations/sssssp0f"/>
      <lastmod>2026-11-02T15:04:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflections-and-geometric-transformations/sssssp0f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-and-geometric-transformations/sssssp0f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-and-geometric-transformations/sssssp0f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-and-geometric-transformations/sssssp0f"/>
      <lastmod>2026-11-02T15:04:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intuitive-introduction-to-volume/sssssp08</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intuitive-introduction-to-volume/sssssp08"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intuitive-introduction-to-volume/sssssp08"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intuitive-introduction-to-volume/sssssp08"/>
      <lastmod>2026-11-01T19:21:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intuitive-introduction-to-volume/sssssp08</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intuitive-introduction-to-volume/sssssp08"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intuitive-introduction-to-volume/sssssp08"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intuitive-introduction-to-volume/sssssp08"/>
      <lastmod>2026-11-01T19:21:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/accelerated-geometry-town-parallel-lines-and-transversal-angle-activity/sssssp0u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/accelerated-geometry-town-parallel-lines-and-transversal-angle-activity/sssssp0u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/accelerated-geometry-town-parallel-lines-and-transversal-angle-activity/sssssp0u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/accelerated-geometry-town-parallel-lines-and-transversal-angle-activity/sssssp0u"/>
      <lastmod>2026-11-01T20:51:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/accelerated-geometry-town-parallel-lines-and-transversal-angle-activity/sssssp0u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/accelerated-geometry-town-parallel-lines-and-transversal-angle-activity/sssssp0u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/accelerated-geometry-town-parallel-lines-and-transversal-angle-activity/sssssp0u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/accelerated-geometry-town-parallel-lines-and-transversal-angle-activity/sssssp0u"/>
      <lastmod>2026-11-01T20:51:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-and-hyperboloid-intersection-construction/sssssp05</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-and-hyperboloid-intersection-construction/sssssp05"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-and-hyperboloid-intersection-construction/sssssp05"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-and-hyperboloid-intersection-construction/sssssp05"/>
      <lastmod>2026-11-02T00:24:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-and-hyperboloid-intersection-construction/sssssp05</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-and-hyperboloid-intersection-construction/sssssp05"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-and-hyperboloid-intersection-construction/sssssp05"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-and-hyperboloid-intersection-construction/sssssp05"/>
      <lastmod>2026-11-02T00:24:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-construction-of-the-geometric-median-in-3d/sssssp0b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-construction-of-the-geometric-median-in-3d/sssssp0b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-construction-of-the-geometric-median-in-3d/sssssp0b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-construction-of-the-geometric-median-in-3d/sssssp0b"/>
      <lastmod>2026-11-01T23:40:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-construction-of-the-geometric-median-in-3d/sssssp0b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-construction-of-the-geometric-median-in-3d/sssssp0b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-construction-of-the-geometric-median-in-3d/sssssp0b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-construction-of-the-geometric-median-in-3d/sssssp0b"/>
      <lastmod>2026-11-01T23:40:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/moving-average-rolling-average-running-average/sssssp03</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/moving-average-rolling-average-running-average/sssssp03"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/moving-average-rolling-average-running-average/sssssp03"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/moving-average-rolling-average-running-average/sssssp03"/>
      <lastmod>2026-11-01T23:35:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/moving-average-rolling-average-running-average/sssssp03</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/moving-average-rolling-average-running-average/sssssp03"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/moving-average-rolling-average-running-average/sssssp03"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/moving-average-rolling-average-running-average/sssssp03"/>
      <lastmod>2026-11-01T23:35:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-averages-box-plots-and-outliers/sssssp0q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-averages-box-plots-and-outliers/sssssp0q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-averages-box-plots-and-outliers/sssssp0q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-averages-box-plots-and-outliers/sssssp0q"/>
      <lastmod>2026-11-02T17:02:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-averages-box-plots-and-outliers/sssssp0q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-averages-box-plots-and-outliers/sssssp0q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-averages-box-plots-and-outliers/sssssp0q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-averages-box-plots-and-outliers/sssssp0q"/>
      <lastmod>2026-11-02T17:02:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/discrete-probability-distributions-mean-standard-deviation/sssssp01</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discrete-probability-distributions-mean-standard-deviation/sssssp01"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discrete-probability-distributions-mean-standard-deviation/sssssp01"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discrete-probability-distributions-mean-standard-deviation/sssssp01"/>
      <lastmod>2026-11-02T17:15:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/discrete-probability-distributions-mean-standard-deviation/sssssp01</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discrete-probability-distributions-mean-standard-deviation/sssssp01"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discrete-probability-distributions-mean-standard-deviation/sssssp01"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discrete-probability-distributions-mean-standard-deviation/sssssp01"/>
      <lastmod>2026-11-02T17:15:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/compare-integers/sssssp0m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-integers/sssssp0m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-integers/sssssp0m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-integers/sssssp0m"/>
      <lastmod>2026-11-02T15:36:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/compare-integers/sssssp0m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-integers/sssssp0m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-integers/sssssp0m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-integers/sssssp0m"/>
      <lastmod>2026-11-02T15:36:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-inequalities-in-slope-intercept-form-fractions/sssssp0j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-inequalities-in-slope-intercept-form-fractions/sssssp0j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-inequalities-in-slope-intercept-form-fractions/sssssp0j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-inequalities-in-slope-intercept-form-fractions/sssssp0j"/>
      <lastmod>2026-11-02T17:57:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-inequalities-in-slope-intercept-form-fractions/sssssp0j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-inequalities-in-slope-intercept-form-fractions/sssssp0j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-inequalities-in-slope-intercept-form-fractions/sssssp0j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-inequalities-in-slope-intercept-form-fractions/sssssp0j"/>
      <lastmod>2026-11-02T17:57:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/expressing-angles-using-inverse-trigonometric-functions-in-right-triangles/sssssp0p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/expressing-angles-using-inverse-trigonometric-functions-in-right-triangles/sssssp0p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/expressing-angles-using-inverse-trigonometric-functions-in-right-triangles/sssssp0p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/expressing-angles-using-inverse-trigonometric-functions-in-right-triangles/sssssp0p"/>
      <lastmod>2026-11-02T13:36:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/expressing-angles-using-inverse-trigonometric-functions-in-right-triangles/sssssp0p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/expressing-angles-using-inverse-trigonometric-functions-in-right-triangles/sssssp0p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/expressing-angles-using-inverse-trigonometric-functions-in-right-triangles/sssssp0p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/expressing-angles-using-inverse-trigonometric-functions-in-right-triangles/sssssp0p"/>
      <lastmod>2026-11-02T13:36:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/catenoid-dynamic-and-modifiable-illustrator/sssssp0w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/catenoid-dynamic-and-modifiable-illustrator/sssssp0w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/catenoid-dynamic-and-modifiable-illustrator/sssssp0w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/catenoid-dynamic-and-modifiable-illustrator/sssssp0w"/>
      <lastmod>2026-11-02T10:46:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/catenoid-dynamic-and-modifiable-illustrator/sssssp0w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/catenoid-dynamic-and-modifiable-illustrator/sssssp0w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/catenoid-dynamic-and-modifiable-illustrator/sssssp0w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/catenoid-dynamic-and-modifiable-illustrator/sssssp0w"/>
      <lastmod>2026-11-02T10:46:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slicing-a-triangular-pyramid/sssssp06</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slicing-a-triangular-pyramid/sssssp06"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slicing-a-triangular-pyramid/sssssp06"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slicing-a-triangular-pyramid/sssssp06"/>
      <lastmod>2026-11-01T23:31:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slicing-a-triangular-pyramid/sssssp06</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slicing-a-triangular-pyramid/sssssp06"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slicing-a-triangular-pyramid/sssssp06"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slicing-a-triangular-pyramid/sssssp06"/>
      <lastmod>2026-11-01T23:31:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-madness-a-geogebra-example/sssssp0g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-madness-a-geogebra-example/sssssp0g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-madness-a-geogebra-example/sssssp0g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-madness-a-geogebra-example/sssssp0g"/>
      <lastmod>2026-11-01T22:50:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-madness-a-geogebra-example/sssssp0g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-madness-a-geogebra-example/sssssp0g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-madness-a-geogebra-example/sssssp0g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-madness-a-geogebra-example/sssssp0g"/>
      <lastmod>2026-11-01T22:50:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-in-action-mirror-and-translation-in-3d/sssssp09</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-in-action-mirror-and-translation-in-3d/sssssp09"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-in-action-mirror-and-translation-in-3d/sssssp09"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-in-action-mirror-and-translation-in-3d/sssssp09"/>
      <lastmod>2026-11-02T17:50:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-in-action-mirror-and-translation-in-3d/sssssp09</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-in-action-mirror-and-translation-in-3d/sssssp09"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-in-action-mirror-and-translation-in-3d/sssssp09"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-in-action-mirror-and-translation-in-3d/sssssp09"/>
      <lastmod>2026-11-02T17:50:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-3/sssssp0e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-3/sssssp0e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-illustration-by-tim-brzezinski-3/sssssp0e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-3/sssssp0e"/>
      <lastmod>2026-11-02T03:19:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-geometry-illustration-by-tim-brzezinski-3/sssssp0e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-3/sssssp0e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-illustration-by-tim-brzezinski-3/sssssp0e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-3/sssssp0e"/>
      <lastmod>2026-11-02T03:19:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construction-of-a-square-step-by-step/sssssp0v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-a-square-step-by-step/sssssp0v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-a-square-step-by-step/sssssp0v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-a-square-step-by-step/sssssp0v"/>
      <lastmod>2026-11-02T18:26:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construction-of-a-square-step-by-step/sssssp0v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-a-square-step-by-step/sssssp0v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-a-square-step-by-step/sssssp0v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-a-square-step-by-step/sssssp0v"/>
      <lastmod>2026-11-02T18:26:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mambo-variations-on-frank-stella-visual-math-art-demo/sssssp04</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mambo-variations-on-frank-stella-visual-math-art-demo/sssssp04"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mambo-variations-on-frank-stella-visual-math-art-demo/sssssp04"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mambo-variations-on-frank-stella-visual-math-art-demo/sssssp04"/>
      <lastmod>2026-11-01T23:12:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mambo-variations-on-frank-stella-visual-math-art-demo/sssssp04</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mambo-variations-on-frank-stella-visual-math-art-demo/sssssp04"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mambo-variations-on-frank-stella-visual-math-art-demo/sssssp04"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mambo-variations-on-frank-stella-visual-math-art-demo/sssssp04"/>
      <lastmod>2026-11-01T23:12:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/factoring-method-quadratic-equation-practice/sssssp0l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factoring-method-quadratic-equation-practice/sssssp0l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factoring-method-quadratic-equation-practice/sssssp0l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factoring-method-quadratic-equation-practice/sssssp0l"/>
      <lastmod>2026-11-02T18:46:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/factoring-method-quadratic-equation-practice/sssssp0l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factoring-method-quadratic-equation-practice/sssssp0l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factoring-method-quadratic-equation-practice/sssssp0l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factoring-method-quadratic-equation-practice/sssssp0l"/>
      <lastmod>2026-11-02T18:46:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arc-length-sector-area-and-segment-area-calculation/sssssp0y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arc-length-sector-area-and-segment-area-calculation/sssssp0y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arc-length-sector-area-and-segment-area-calculation/sssssp0y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arc-length-sector-area-and-segment-area-calculation/sssssp0y"/>
      <lastmod>2026-11-01T19:05:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arc-length-sector-area-and-segment-area-calculation/sssssp0y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arc-length-sector-area-and-segment-area-calculation/sssssp0y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arc-length-sector-area-and-segment-area-calculation/sssssp0y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arc-length-sector-area-and-segment-area-calculation/sssssp0y"/>
      <lastmod>2026-11-01T19:05:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformations-1-basic-transformations/sssssp0a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-1-basic-transformations/sssssp0a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-1-basic-transformations/sssssp0a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-1-basic-transformations/sssssp0a"/>
      <lastmod>2026-11-02T12:05:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformations-1-basic-transformations/sssssp0a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-1-basic-transformations/sssssp0a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-1-basic-transformations/sssssp0a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-1-basic-transformations/sssssp0a"/>
      <lastmod>2026-11-02T12:05:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-and-cusp-analysis-of-x-1-2-3/sssssp0c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-and-cusp-analysis-of-x-1-2-3/sssssp0c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-and-cusp-analysis-of-x-1-2-3/sssssp0c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-and-cusp-analysis-of-x-1-2-3/sssssp0c"/>
      <lastmod>2026-11-02T00:38:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-and-cusp-analysis-of-x-1-2-3/sssssp0c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-and-cusp-analysis-of-x-1-2-3/sssssp0c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-and-cusp-analysis-of-x-1-2-3/sssssp0c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-and-cusp-analysis-of-x-1-2-3/sssssp0c"/>
      <lastmod>2026-11-02T00:38:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-symmetry-with-two-dimensional-shapes-and-images/sssssp0r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-symmetry-with-two-dimensional-shapes-and-images/sssssp0r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-symmetry-with-two-dimensional-shapes-and-images/sssssp0r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-symmetry-with-two-dimensional-shapes-and-images/sssssp0r"/>
      <lastmod>2026-11-02T12:10:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-symmetry-with-two-dimensional-shapes-and-images/sssssp0r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-symmetry-with-two-dimensional-shapes-and-images/sssssp0r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-symmetry-with-two-dimensional-shapes-and-images/sssssp0r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-symmetry-with-two-dimensional-shapes-and-images/sssssp0r"/>
      <lastmod>2026-11-02T12:10:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-geometric-construction-example-intersection-of-triangle-and-circle/sssssp0h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-geometric-construction-example-intersection-of-triangle-and-circle/sssssp0h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-geometric-construction-example-intersection-of-triangle-and-circle/sssssp0h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-geometric-construction-example-intersection-of-triangle-and-circle/sssssp0h"/>
      <lastmod>2026-11-02T00:33:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-geometric-construction-example-intersection-of-triangle-and-circle/sssssp0h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-geometric-construction-example-intersection-of-triangle-and-circle/sssssp0h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-geometric-construction-example-intersection-of-triangle-and-circle/sssssp0h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-geometric-construction-example-intersection-of-triangle-and-circle/sssssp0h"/>
      <lastmod>2026-11-02T00:33:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-definite-integral-as-limit-of-sum/sssssp0t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-definite-integral-as-limit-of-sum/sssssp0t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-definite-integral-as-limit-of-sum/sssssp0t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-definite-integral-as-limit-of-sum/sssssp0t"/>
      <lastmod>2026-11-02T09:29:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-definite-integral-as-limit-of-sum/sssssp0t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-definite-integral-as-limit-of-sum/sssssp0t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-definite-integral-as-limit-of-sum/sssssp0t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-definite-integral-as-limit-of-sum/sssssp0t"/>
      <lastmod>2026-11-02T09:29:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplication-of-complex-numbers-by-integers/sssssp0x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-of-complex-numbers-by-integers/sssssp0x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-of-complex-numbers-by-integers/sssssp0x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-of-complex-numbers-by-integers/sssssp0x"/>
      <lastmod>2026-11-01T23:31:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplication-of-complex-numbers-by-integers/sssssp0x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-of-complex-numbers-by-integers/sssssp0x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-of-complex-numbers-by-integers/sssssp0x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-of-complex-numbers-by-integers/sssssp0x"/>
      <lastmod>2026-11-01T23:31:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-disk-method-with-hole/sssssp0i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-disk-method-with-hole/sssssp0i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-disk-method-with-hole/sssssp0i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-disk-method-with-hole/sssssp0i"/>
      <lastmod>2026-11-01T19:07:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-disk-method-with-hole/sssssp0i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-disk-method-with-hole/sssssp0i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-disk-method-with-hole/sssssp0i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-disk-method-with-hole/sssssp0i"/>
      <lastmod>2026-11-01T19:07:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-worksheet-interactive-geometry-exploration/sssssp0o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-worksheet-interactive-geometry-exploration/sssssp0o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-worksheet-interactive-geometry-exploration/sssssp0o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-worksheet-interactive-geometry-exploration/sssssp0o"/>
      <lastmod>2026-11-02T18:45:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-worksheet-interactive-geometry-exploration/sssssp0o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-worksheet-interactive-geometry-exploration/sssssp0o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-worksheet-interactive-geometry-exploration/sssssp0o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-worksheet-interactive-geometry-exploration/sssssp0o"/>
      <lastmod>2026-11-02T18:45:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-by-chloe-3/ssssspds</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-by-chloe-3/ssssspds"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-rectangular-prism-by-chloe-3/ssssspds"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-by-chloe-3/ssssspds"/>
      <lastmod>2026-11-02T18:59:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-a-rectangular-prism-by-chloe-3/ssssspds</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-by-chloe-3/ssssspds"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-rectangular-prism-by-chloe-3/ssssspds"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-rectangular-prism-by-chloe-3/ssssspds"/>
      <lastmod>2026-11-02T18:59:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-a-rotated-cylinder-surface/ssssspd7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-a-rotated-cylinder-surface/ssssspd7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-a-rotated-cylinder-surface/ssssspd7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-a-rotated-cylinder-surface/ssssspd7"/>
      <lastmod>2026-11-02T09:29:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-a-rotated-cylinder-surface/ssssspd7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-a-rotated-cylinder-surface/ssssspd7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-a-rotated-cylinder-surface/ssssspd7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-a-rotated-cylinder-surface/ssssspd7"/>
      <lastmod>2026-11-02T09:29:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/views-of-a-cube-spatial-visualization-and-geometric-construction/ssssspdn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/views-of-a-cube-spatial-visualization-and-geometric-construction/ssssspdn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/views-of-a-cube-spatial-visualization-and-geometric-construction/ssssspdn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/views-of-a-cube-spatial-visualization-and-geometric-construction/ssssspdn"/>
      <lastmod>2026-11-01T19:10:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/views-of-a-cube-spatial-visualization-and-geometric-construction/ssssspdn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/views-of-a-cube-spatial-visualization-and-geometric-construction/ssssspdn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/views-of-a-cube-spatial-visualization-and-geometric-construction/ssssspdn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/views-of-a-cube-spatial-visualization-and-geometric-construction/ssssspdn"/>
      <lastmod>2026-11-01T19:10:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/partial-quotients-division-with-arrays-demo/ssssspd2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-quotients-division-with-arrays-demo/ssssspd2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-quotients-division-with-arrays-demo/ssssspd2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-quotients-division-with-arrays-demo/ssssspd2"/>
      <lastmod>2026-11-02T16:39:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/partial-quotients-division-with-arrays-demo/ssssspd2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-quotients-division-with-arrays-demo/ssssspd2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-quotients-division-with-arrays-demo/ssssspd2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-quotients-division-with-arrays-demo/ssssspd2"/>
      <lastmod>2026-11-02T16:39:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-bisectors-of-a-triangle-activity/ssssspdk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisectors-of-a-triangle-activity/ssssspdk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisectors-of-a-triangle-activity/ssssspdk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisectors-of-a-triangle-activity/ssssspdk"/>
      <lastmod>2026-11-01T23:20:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-bisectors-of-a-triangle-activity/ssssspdk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisectors-of-a-triangle-activity/ssssspdk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisectors-of-a-triangle-activity/ssssspdk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisectors-of-a-triangle-activity/ssssspdk"/>
      <lastmod>2026-11-01T23:20:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-8-6-2-practice-plotting-data/ssssspdz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-8-6-2-practice-plotting-data/ssssspdz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-8-6-2-practice-plotting-data/ssssspdz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-8-6-2-practice-plotting-data/ssssspdz"/>
      <lastmod>2026-11-01T20:17:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-8-6-2-practice-plotting-data/ssssspdz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-8-6-2-practice-plotting-data/ssssspdz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-8-6-2-practice-plotting-data/ssssspdz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-8-6-2-practice-plotting-data/ssssspdz"/>
      <lastmod>2026-11-01T20:17:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construct-a-45-degree-angle/ssssspd0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-a-45-degree-angle/ssssspd0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-a-45-degree-angle/ssssspd0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-a-45-degree-angle/ssssspd0"/>
      <lastmod>2026-11-01T20:50:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construct-a-45-degree-angle/ssssspd0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-a-45-degree-angle/ssssspd0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-a-45-degree-angle/ssssspd0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-a-45-degree-angle/ssssspd0"/>
      <lastmod>2026-11-01T20:50:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-centroid/ssssspdd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-centroid/ssssspdd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-centroid/ssssspdd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-centroid/ssssspdd"/>
      <lastmod>2026-11-01T19:18:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-centroid/ssssspdd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-centroid/ssssspdd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-centroid/ssssspdd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-centroid/ssssspdd"/>
      <lastmod>2026-11-01T19:18:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-area-and-perimeter-calculation/ssssspdf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-area-and-perimeter-calculation/ssssspdf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-area-and-perimeter-calculation/ssssspdf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-area-and-perimeter-calculation/ssssspdf"/>
      <lastmod>2026-11-01T23:35:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-area-and-perimeter-calculation/ssssspdf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-area-and-perimeter-calculation/ssssspdf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-area-and-perimeter-calculation/ssssspdf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-area-and-perimeter-calculation/ssssspdf"/>
      <lastmod>2026-11-01T23:35:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/basic-coordinate-plane-for-graphing-equations/ssssspd8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-coordinate-plane-for-graphing-equations/ssssspd8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-coordinate-plane-for-graphing-equations/ssssspd8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-coordinate-plane-for-graphing-equations/ssssspd8"/>
      <lastmod>2026-11-01T21:39:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/basic-coordinate-plane-for-graphing-equations/ssssspd8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-coordinate-plane-for-graphing-equations/ssssspd8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-coordinate-plane-for-graphing-equations/ssssspd8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-coordinate-plane-for-graphing-equations/ssssspd8"/>
      <lastmod>2026-11-01T21:39:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-derivative-and-tangent-interactive/ssssspdu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-derivative-and-tangent-interactive/ssssspdu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-derivative-and-tangent-interactive/ssssspdu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-derivative-and-tangent-interactive/ssssspdu"/>
      <lastmod>2026-11-02T16:40:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-derivative-and-tangent-interactive/ssssspdu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-derivative-and-tangent-interactive/ssssspdu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-derivative-and-tangent-interactive/ssssspdu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-derivative-and-tangent-interactive/ssssspdu"/>
      <lastmod>2026-11-02T16:40:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-growth/ssssspd5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-growth/ssssspd5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-growth/ssssspd5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-growth/ssssspd5"/>
      <lastmod>2026-11-02T14:52:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-growth/ssssspd5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-growth/ssssspd5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-growth/ssssspd5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-growth/ssssspd5"/>
      <lastmod>2026-11-02T14:52:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponent-base-sliders/ssssspdb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-base-sliders/ssssspdb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-base-sliders/ssssspdb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-base-sliders/ssssspdb"/>
      <lastmod>2026-11-02T18:13:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponent-base-sliders/ssssspdb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-base-sliders/ssssspdb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-base-sliders/ssssspdb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-base-sliders/ssssspdb"/>
      <lastmod>2026-11-02T18:13:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/skew-lines-exploration/ssssspd3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/skew-lines-exploration/ssssspd3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/skew-lines-exploration/ssssspd3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/skew-lines-exploration/ssssspd3"/>
      <lastmod>2026-11-02T18:02:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/skew-lines-exploration/ssssspd3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/skew-lines-exploration/ssssspd3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/skew-lines-exploration/ssssspd3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/skew-lines-exploration/ssssspd3"/>
      <lastmod>2026-11-02T18:02:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-ratios-by-jeff-caldwell/ssssspdq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-by-jeff-caldwell/ssssspdq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-by-jeff-caldwell/ssssspdq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-by-jeff-caldwell/ssssspdq"/>
      <lastmod>2026-11-02T16:59:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-ratios-by-jeff-caldwell/ssssspdq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-by-jeff-caldwell/ssssspdq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-by-jeff-caldwell/ssssspdq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-by-jeff-caldwell/ssssspdq"/>
      <lastmod>2026-11-02T16:59:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/measuring-angles-geogebra-beginner-exercise-5/ssssspd1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/measuring-angles-geogebra-beginner-exercise-5/ssssspd1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/measuring-angles-geogebra-beginner-exercise-5/ssssspd1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/measuring-angles-geogebra-beginner-exercise-5/ssssspd1"/>
      <lastmod>2026-11-02T00:20:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/measuring-angles-geogebra-beginner-exercise-5/ssssspd1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/measuring-angles-geogebra-beginner-exercise-5/ssssspd1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/measuring-angles-geogebra-beginner-exercise-5/ssssspd1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/measuring-angles-geogebra-beginner-exercise-5/ssssspd1"/>
      <lastmod>2026-11-02T00:20:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-functions-in-2-variables/ssssspdm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions-in-2-variables/ssssspdm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions-in-2-variables/ssssspdm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions-in-2-variables/ssssspdm"/>
      <lastmod>2026-11-02T16:33:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-functions-in-2-variables/ssssspdm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions-in-2-variables/ssssspdm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions-in-2-variables/ssssspdm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions-in-2-variables/ssssspdm"/>
      <lastmod>2026-11-02T16:33:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/difference-of-cubes-geometric-visualization/ssssspdj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/difference-of-cubes-geometric-visualization/ssssspdj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/difference-of-cubes-geometric-visualization/ssssspdj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/difference-of-cubes-geometric-visualization/ssssspdj"/>
      <lastmod>2026-11-01T21:30:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/difference-of-cubes-geometric-visualization/ssssspdj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/difference-of-cubes-geometric-visualization/ssssspdj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/difference-of-cubes-geometric-visualization/ssssspdj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/difference-of-cubes-geometric-visualization/ssssspdj"/>
      <lastmod>2026-11-01T21:30:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-positive-and-negative-number-multiplication/ssssspdp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-positive-and-negative-number-multiplication/ssssspdp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-positive-and-negative-number-multiplication/ssssspdp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-positive-and-negative-number-multiplication/ssssspdp"/>
      <lastmod>2026-11-01T19:15:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-positive-and-negative-number-multiplication/ssssspdp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-positive-and-negative-number-multiplication/ssssspdp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-positive-and-negative-number-multiplication/ssssspdp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-positive-and-negative-number-multiplication/ssssspdp"/>
      <lastmod>2026-11-01T19:15:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/defining-trigonometric-ratios/ssssspdw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/defining-trigonometric-ratios/ssssspdw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/defining-trigonometric-ratios/ssssspdw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/defining-trigonometric-ratios/ssssspdw"/>
      <lastmod>2026-11-02T17:48:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/defining-trigonometric-ratios/ssssspdw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/defining-trigonometric-ratios/ssssspdw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/defining-trigonometric-ratios/ssssspdw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/defining-trigonometric-ratios/ssssspdw"/>
      <lastmod>2026-11-02T17:48:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/point-of-division-locus/ssssspd6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-of-division-locus/ssssspd6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-of-division-locus/ssssspd6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-of-division-locus/ssssspd6"/>
      <lastmod>2026-11-02T12:00:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/point-of-division-locus/ssssspd6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-of-division-locus/ssssspd6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-of-division-locus/ssssspd6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-of-division-locus/ssssspd6"/>
      <lastmod>2026-11-02T12:00:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a-twisted-eiffel-tower/ssssspdg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-twisted-eiffel-tower/ssssspdg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-twisted-eiffel-tower/ssssspdg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-twisted-eiffel-tower/ssssspdg"/>
      <lastmod>2026-11-01T21:28:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a-twisted-eiffel-tower/ssssspdg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-twisted-eiffel-tower/ssssspdg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-twisted-eiffel-tower/ssssspdg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-twisted-eiffel-tower/ssssspdg"/>
      <lastmod>2026-11-01T21:28:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-function-and-incircle-dynamic-exploration-example/ssssspd9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-function-and-incircle-dynamic-exploration-example/ssssspd9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-function-and-incircle-dynamic-exploration-example/ssssspd9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-function-and-incircle-dynamic-exploration-example/ssssspd9"/>
      <lastmod>2026-11-02T00:34:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-function-and-incircle-dynamic-exploration-example/ssssspd9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-function-and-incircle-dynamic-exploration-example/ssssspd9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-function-and-incircle-dynamic-exploration-example/ssssspd9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-function-and-incircle-dynamic-exploration-example/ssssspd9"/>
      <lastmod>2026-11-02T00:34:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/root-chakra-geometric-construction-based-on-pythagorean-theorem/ssssspde</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/root-chakra-geometric-construction-based-on-pythagorean-theorem/ssssspde"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/root-chakra-geometric-construction-based-on-pythagorean-theorem/ssssspde"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/root-chakra-geometric-construction-based-on-pythagorean-theorem/ssssspde"/>
      <lastmod>2026-11-01T19:12:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/root-chakra-geometric-construction-based-on-pythagorean-theorem/ssssspde</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/root-chakra-geometric-construction-based-on-pythagorean-theorem/ssssspde"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/root-chakra-geometric-construction-based-on-pythagorean-theorem/ssssspde"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/root-chakra-geometric-construction-based-on-pythagorean-theorem/ssssspde"/>
      <lastmod>2026-11-01T19:12:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dividing-a-cube-into-7-parts/ssssspdv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dividing-a-cube-into-7-parts/ssssspdv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dividing-a-cube-into-7-parts/ssssspdv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dividing-a-cube-into-7-parts/ssssspdv"/>
      <lastmod>2026-11-02T18:28:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dividing-a-cube-into-7-parts/ssssspdv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dividing-a-cube-into-7-parts/ssssspdv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dividing-a-cube-into-7-parts/ssssspdv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dividing-a-cube-into-7-parts/ssssspdv"/>
      <lastmod>2026-11-02T18:28:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-way-tables/ssssspd4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-way-tables/ssssspd4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-way-tables/ssssspd4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-way-tables/ssssspd4"/>
      <lastmod>2026-11-01T20:48:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-way-tables/ssssspd4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-way-tables/ssssspd4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-way-tables/ssssspd4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-way-tables/ssssspd4"/>
      <lastmod>2026-11-01T20:48:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/roots-of-a-polynomial/ssssspdl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roots-of-a-polynomial/ssssspdl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roots-of-a-polynomial/ssssspdl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roots-of-a-polynomial/ssssspdl"/>
      <lastmod>2026-11-02T18:01:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/roots-of-a-polynomial/ssssspdl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roots-of-a-polynomial/ssssspdl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roots-of-a-polynomial/ssssspdl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roots-of-a-polynomial/ssssspdl"/>
      <lastmod>2026-11-02T18:01:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformation-station-rotation/ssssspdy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformation-station-rotation/ssssspdy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformation-station-rotation/ssssspdy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformation-station-rotation/ssssspdy"/>
      <lastmod>2026-11-02T00:01:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformation-station-rotation/ssssspdy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformation-station-rotation/ssssspdy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformation-station-rotation/ssssspdy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformation-station-rotation/ssssspdy"/>
      <lastmod>2026-11-02T00:01:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/projectile-motion-visualization/ssssspda</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/projectile-motion-visualization/ssssspda"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/projectile-motion-visualization/ssssspda"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/projectile-motion-visualization/ssssspda"/>
      <lastmod>2026-11-02T16:37:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/projectile-motion-visualization/ssssspda</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/projectile-motion-visualization/ssssspda"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/projectile-motion-visualization/ssssspda"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/projectile-motion-visualization/ssssspda"/>
      <lastmod>2026-11-02T16:37:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-between-2-surfaces/ssssspdc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-between-2-surfaces/ssssspdc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-between-2-surfaces/ssssspdc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-between-2-surfaces/ssssspdc"/>
      <lastmod>2026-11-02T02:16:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-between-2-surfaces/ssssspdc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-between-2-surfaces/ssssspdc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-between-2-surfaces/ssssspdc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-between-2-surfaces/ssssspdc"/>
      <lastmod>2026-11-02T02:16:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-ratios-by-kevin-agnew/ssssspdr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-by-kevin-agnew/ssssspdr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-by-kevin-agnew/ssssspdr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-by-kevin-agnew/ssssspdr"/>
      <lastmod>2026-11-02T06:45:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-ratios-by-kevin-agnew/ssssspdr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-by-kevin-agnew/ssssspdr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-by-kevin-agnew/ssssspdr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-by-kevin-agnew/ssssspdr"/>
      <lastmod>2026-11-02T06:45:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-nbc-logo/ssssspdh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-nbc-logo/ssssspdh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-nbc-logo/ssssspdh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-nbc-logo/ssssspdh"/>
      <lastmod>2026-11-01T23:23:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-nbc-logo/ssssspdh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-nbc-logo/ssssspdh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-nbc-logo/ssssspdh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-nbc-logo/ssssspdh"/>
      <lastmod>2026-11-01T23:23:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slope-field-for-first-order-differential-equations/ssssspdt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-field-for-first-order-differential-equations/ssssspdt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-field-for-first-order-differential-equations/ssssspdt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-field-for-first-order-differential-equations/ssssspdt"/>
      <lastmod>2026-11-02T18:42:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slope-field-for-first-order-differential-equations/ssssspdt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-field-for-first-order-differential-equations/ssssspdt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-field-for-first-order-differential-equations/ssssspdt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-field-for-first-order-differential-equations/ssssspdt"/>
      <lastmod>2026-11-02T18:42:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflectional-symmetry-polygon-mirror-and-axis-exploration/ssssspdx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflectional-symmetry-polygon-mirror-and-axis-exploration/ssssspdx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflectional-symmetry-polygon-mirror-and-axis-exploration/ssssspdx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflectional-symmetry-polygon-mirror-and-axis-exploration/ssssspdx"/>
      <lastmod>2026-11-02T10:54:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflectional-symmetry-polygon-mirror-and-axis-exploration/ssssspdx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflectional-symmetry-polygon-mirror-and-axis-exploration/ssssspdx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflectional-symmetry-polygon-mirror-and-axis-exploration/ssssspdx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflectional-symmetry-polygon-mirror-and-axis-exploration/ssssspdx"/>
      <lastmod>2026-11-02T10:54:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilatations-rotations-rainbow-snail/ssssspdi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilatations-rotations-rainbow-snail/ssssspdi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilatations-rotations-rainbow-snail/ssssspdi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilatations-rotations-rainbow-snail/ssssspdi"/>
      <lastmod>2026-11-01T20:52:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilatations-rotations-rainbow-snail/ssssspdi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilatations-rotations-rainbow-snail/ssssspdi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilatations-rotations-rainbow-snail/ssssspdi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilatations-rotations-rainbow-snail/ssssspdi"/>
      <lastmod>2026-11-01T20:52:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-curve/ssssspdo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-curve/ssssspdo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-curve/ssssspdo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-curve/ssssspdo"/>
      <lastmod>2026-11-02T12:56:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-curve/ssssspdo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-curve/ssssspdo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-curve/ssssspdo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-curve/ssssspdo"/>
      <lastmod>2026-11-02T12:56:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/oblique-pyramid/ssssspfs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-pyramid/ssssspfs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-pyramid/ssssspfs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-pyramid/ssssspfs"/>
      <lastmod>2026-11-02T12:38:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/oblique-pyramid/ssssspfs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-pyramid/ssssspfs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-pyramid/ssssspfs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-pyramid/ssssspfs"/>
      <lastmod>2026-11-02T12:38:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-prism/ssssspf7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-prism/ssssspf7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-prism/ssssspf7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-prism/ssssspf7"/>
      <lastmod>2026-11-02T17:15:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-prism/ssssspf7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-prism/ssssspf7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-prism/ssssspf7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-prism/ssssspf7"/>
      <lastmod>2026-11-02T17:15:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inscribed-polygon/ssssspfn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inscribed-polygon/ssssspfn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inscribed-polygon/ssssspfn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inscribed-polygon/ssssspfn"/>
      <lastmod>2026-11-02T02:45:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inscribed-polygon/ssssspfn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inscribed-polygon/ssssspfn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inscribed-polygon/ssssspfn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inscribed-polygon/ssssspfn"/>
      <lastmod>2026-11-02T02:45:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/making-right-angled-triangles-square-grid/ssssspf2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-right-angled-triangles-square-grid/ssssspf2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-right-angled-triangles-square-grid/ssssspf2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-right-angled-triangles-square-grid/ssssspf2"/>
      <lastmod>2026-11-01T21:10:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/making-right-angled-triangles-square-grid/ssssspf2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-right-angled-triangles-square-grid/ssssspf2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-right-angled-triangles-square-grid/ssssspf2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-right-angled-triangles-square-grid/ssssspf2"/>
      <lastmod>2026-11-01T21:10:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mixed-operation-challenge-1-9-numbers/ssssspfk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mixed-operation-challenge-1-9-numbers/ssssspfk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mixed-operation-challenge-1-9-numbers/ssssspfk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mixed-operation-challenge-1-9-numbers/ssssspfk"/>
      <lastmod>2026-11-01T23:38:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mixed-operation-challenge-1-9-numbers/ssssspfk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mixed-operation-challenge-1-9-numbers/ssssspfk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mixed-operation-challenge-1-9-numbers/ssssspfk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mixed-operation-challenge-1-9-numbers/ssssspfk"/>
      <lastmod>2026-11-01T23:38:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotational-symmetry-by-raffaele-fantasia1/ssssspfz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-raffaele-fantasia1/ssssspfz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-by-raffaele-fantasia1/ssssspfz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-raffaele-fantasia1/ssssspfz"/>
      <lastmod>2026-11-02T18:56:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotational-symmetry-by-raffaele-fantasia1/ssssspfz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-raffaele-fantasia1/ssssspfz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-by-raffaele-fantasia1/ssssspfz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-raffaele-fantasia1/ssssspfz"/>
      <lastmod>2026-11-02T18:56:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-of-xv-logo/ssssspf0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-of-xv-logo/ssssspf0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-of-xv-logo/ssssspf0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-of-xv-logo/ssssspf0"/>
      <lastmod>2026-11-02T18:30:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-of-xv-logo/ssssspf0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-of-xv-logo/ssssspf0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-of-xv-logo/ssssspf0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-of-xv-logo/ssssspf0"/>
      <lastmod>2026-11-02T18:30:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-and-geometric-probability-models/ssssspfd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-and-geometric-probability-models/ssssspfd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-and-geometric-probability-models/ssssspfd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-and-geometric-probability-models/ssssspfd"/>
      <lastmod>2026-11-02T18:40:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-and-geometric-probability-models/ssssspfd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-and-geometric-probability-models/ssssspfd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-and-geometric-probability-models/ssssspfd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-and-geometric-probability-models/ssssspfd"/>
      <lastmod>2026-11-02T18:40:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-the-orthocenter/ssssspff</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-orthocenter/ssssspff"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-the-orthocenter/ssssspff"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-orthocenter/ssssspff"/>
      <lastmod>2026-11-02T09:34:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-the-orthocenter/ssssspff</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-orthocenter/ssssspff"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-the-orthocenter/ssssspff"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-orthocenter/ssssspff"/>
      <lastmod>2026-11-02T09:34:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-tangent-construction-and-geometric-properties/ssssspf8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-tangent-construction-and-geometric-properties/ssssspf8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-tangent-construction-and-geometric-properties/ssssspf8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-tangent-construction-and-geometric-properties/ssssspf8"/>
      <lastmod>2026-11-01T23:44:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-tangent-construction-and-geometric-properties/ssssspf8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-tangent-construction-and-geometric-properties/ssssspf8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-tangent-construction-and-geometric-properties/ssssspf8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-tangent-construction-and-geometric-properties/ssssspf8"/>
      <lastmod>2026-11-01T23:44:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-example/ssssspfu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-example/ssssspfu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-example/ssssspfu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-example/ssssspfu"/>
      <lastmod>2026-11-02T08:34:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-example/ssssspfu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-example/ssssspfu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-example/ssssspfu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-example/ssssspfu"/>
      <lastmod>2026-11-02T08:34:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-probability/ssssspf5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-probability/ssssspf5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-probability/ssssspf5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-probability/ssssspf5"/>
      <lastmod>2026-11-01T20:48:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-probability/ssssspf5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-probability/ssssspf5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-probability/ssssspf5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-probability/ssssspf5"/>
      <lastmod>2026-11-01T20:48:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/discriminants-roots-and-intercepts/ssssspfb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discriminants-roots-and-intercepts/ssssspfb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discriminants-roots-and-intercepts/ssssspfb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discriminants-roots-and-intercepts/ssssspfb"/>
      <lastmod>2026-11-01T19:16:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/discriminants-roots-and-intercepts/ssssspfb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discriminants-roots-and-intercepts/ssssspfb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discriminants-roots-and-intercepts/ssssspfb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discriminants-roots-and-intercepts/ssssspfb"/>
      <lastmod>2026-11-01T19:16:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/writing-quadratic-equations/ssssspf3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/writing-quadratic-equations/ssssspf3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/writing-quadratic-equations/ssssspf3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/writing-quadratic-equations/ssssspf3"/>
      <lastmod>2026-11-02T15:44:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/writing-quadratic-equations/ssssspf3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/writing-quadratic-equations/ssssspf3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/writing-quadratic-equations/ssssspf3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/writing-quadratic-equations/ssssspf3"/>
      <lastmod>2026-11-02T15:44:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/three-parameter-transformations-of-the-octahedron-and-extreme-distributions/ssssspfq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-parameter-transformations-of-the-octahedron-and-extreme-distributions/ssssspfq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-parameter-transformations-of-the-octahedron-and-extreme-distributions/ssssspfq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-parameter-transformations-of-the-octahedron-and-extreme-distributions/ssssspfq"/>
      <lastmod>2026-11-01T19:12:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/three-parameter-transformations-of-the-octahedron-and-extreme-distributions/ssssspfq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-parameter-transformations-of-the-octahedron-and-extreme-distributions/ssssspfq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-parameter-transformations-of-the-octahedron-and-extreme-distributions/ssssspfq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-parameter-transformations-of-the-octahedron-and-extreme-distributions/ssssspfq"/>
      <lastmod>2026-11-01T19:12:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-construction-example/ssssspf1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-construction-example/ssssspf1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-construction-example/ssssspf1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-construction-example/ssssspf1"/>
      <lastmod>2026-11-02T13:02:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-construction-example/ssssspf1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-construction-example/ssssspf1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-construction-example/ssssspf1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-construction-example/ssssspf1"/>
      <lastmod>2026-11-02T13:02:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/addition-of-complex-numbers-by-ku-yin-bon-albert/ssssspfm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-of-complex-numbers-by-ku-yin-bon-albert/ssssspfm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-of-complex-numbers-by-ku-yin-bon-albert/ssssspfm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-of-complex-numbers-by-ku-yin-bon-albert/ssssspfm"/>
      <lastmod>2026-11-02T18:51:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/addition-of-complex-numbers-by-ku-yin-bon-albert/ssssspfm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-of-complex-numbers-by-ku-yin-bon-albert/ssssspfm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-of-complex-numbers-by-ku-yin-bon-albert/ssssspfm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-of-complex-numbers-by-ku-yin-bon-albert/ssssspfm"/>
      <lastmod>2026-11-02T18:51:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezium-rule-numerical-integration-demo/ssssspfj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-rule-numerical-integration-demo/ssssspfj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-rule-numerical-integration-demo/ssssspfj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-rule-numerical-integration-demo/ssssspfj"/>
      <lastmod>2026-11-02T09:59:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezium-rule-numerical-integration-demo/ssssspfj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-rule-numerical-integration-demo/ssssspfj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-rule-numerical-integration-demo/ssssspfj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-rule-numerical-integration-demo/ssssspfj"/>
      <lastmod>2026-11-02T09:59:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/printable-spiral-cylinder/ssssspfp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/printable-spiral-cylinder/ssssspfp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/printable-spiral-cylinder/ssssspfp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/printable-spiral-cylinder/ssssspfp"/>
      <lastmod>2026-11-01T21:41:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/printable-spiral-cylinder/ssssspfp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/printable-spiral-cylinder/ssssspfp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/printable-spiral-cylinder/ssssspfp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/printable-spiral-cylinder/ssssspfp"/>
      <lastmod>2026-11-01T21:41:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-long-division-with-whole-numbers/ssssspfw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-long-division-with-whole-numbers/ssssspfw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-long-division-with-whole-numbers/ssssspfw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-long-division-with-whole-numbers/ssssspfw"/>
      <lastmod>2026-11-01T23:54:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-long-division-with-whole-numbers/ssssspfw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-long-division-with-whole-numbers/ssssspfw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-long-division-with-whole-numbers/ssssspfw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-long-division-with-whole-numbers/ssssspfw"/>
      <lastmod>2026-11-01T23:54:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cat-paving/ssssspf6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cat-paving/ssssspf6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cat-paving/ssssspf6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cat-paving/ssssspf6"/>
      <lastmod>2026-11-01T19:06:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cat-paving/ssssspf6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cat-paving/ssssspf6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cat-paving/ssssspf6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cat-paving/ssssspf6"/>
      <lastmod>2026-11-01T19:06:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/factoring-sum-difference-of-cubes-interactive-practice/ssssspfg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factoring-sum-difference-of-cubes-interactive-practice/ssssspfg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factoring-sum-difference-of-cubes-interactive-practice/ssssspfg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factoring-sum-difference-of-cubes-interactive-practice/ssssspfg"/>
      <lastmod>2026-11-01T19:14:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/factoring-sum-difference-of-cubes-interactive-practice/ssssspfg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factoring-sum-difference-of-cubes-interactive-practice/ssssspfg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factoring-sum-difference-of-cubes-interactive-practice/ssssspfg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factoring-sum-difference-of-cubes-interactive-practice/ssssspfg"/>
      <lastmod>2026-11-01T19:14:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rolling-unit-circles-puzzle/ssssspf9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rolling-unit-circles-puzzle/ssssspf9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rolling-unit-circles-puzzle/ssssspf9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rolling-unit-circles-puzzle/ssssspf9"/>
      <lastmod>2026-11-02T17:38:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rolling-unit-circles-puzzle/ssssspf9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rolling-unit-circles-puzzle/ssssspf9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rolling-unit-circles-puzzle/ssssspf9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rolling-unit-circles-puzzle/ssssspf9"/>
      <lastmod>2026-11-02T17:38:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-vectors/ssssspfe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-vectors/ssssspfe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-vectors/ssssspfe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-vectors/ssssspfe"/>
      <lastmod>2026-11-01T23:42:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-vectors/ssssspfe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-vectors/ssssspfe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-vectors/ssssspfe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-vectors/ssssspfe"/>
      <lastmod>2026-11-01T23:42:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/power-of-the-test-demonstration/ssssspfv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/power-of-the-test-demonstration/ssssspfv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/power-of-the-test-demonstration/ssssspfv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/power-of-the-test-demonstration/ssssspfv"/>
      <lastmod>2026-11-01T20:52:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/power-of-the-test-demonstration/ssssspfv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/power-of-the-test-demonstration/ssssspfv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/power-of-the-test-demonstration/ssssspfv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/power-of-the-test-demonstration/ssssspfv"/>
      <lastmod>2026-11-01T20:52:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/velocity-and-force-vector-decomposition-mat-5173-task-3/ssssspf4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/velocity-and-force-vector-decomposition-mat-5173-task-3/ssssspf4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/velocity-and-force-vector-decomposition-mat-5173-task-3/ssssspf4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/velocity-and-force-vector-decomposition-mat-5173-task-3/ssssspf4"/>
      <lastmod>2026-11-01T21:31:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/velocity-and-force-vector-decomposition-mat-5173-task-3/ssssspf4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/velocity-and-force-vector-decomposition-mat-5173-task-3/ssssspf4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/velocity-and-force-vector-decomposition-mat-5173-task-3/ssssspf4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/velocity-and-force-vector-decomposition-mat-5173-task-3/ssssspf4"/>
      <lastmod>2026-11-01T21:31:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sequence-limit-demonstration/ssssspfl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sequence-limit-demonstration/ssssspfl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sequence-limit-demonstration/ssssspfl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sequence-limit-demonstration/ssssspfl"/>
      <lastmod>2026-11-01T21:09:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sequence-limit-demonstration/ssssspfl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sequence-limit-demonstration/ssssspfl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sequence-limit-demonstration/ssssspfl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sequence-limit-demonstration/ssssspfl"/>
      <lastmod>2026-11-01T21:09:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pentagon-construction-and-incircle-demonstration/ssssspfy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pentagon-construction-and-incircle-demonstration/ssssspfy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pentagon-construction-and-incircle-demonstration/ssssspfy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pentagon-construction-and-incircle-demonstration/ssssspfy"/>
      <lastmod>2026-11-02T03:01:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pentagon-construction-and-incircle-demonstration/ssssspfy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pentagon-construction-and-incircle-demonstration/ssssspfy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pentagon-construction-and-incircle-demonstration/ssssspfy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pentagon-construction-and-incircle-demonstration/ssssspfy"/>
      <lastmod>2026-11-02T03:01:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezium-properties-demo-by-ks-wong/ssssspfa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-properties-demo-by-ks-wong/ssssspfa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-properties-demo-by-ks-wong/ssssspfa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-properties-demo-by-ks-wong/ssssspfa"/>
      <lastmod>2026-11-02T16:47:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezium-properties-demo-by-ks-wong/ssssspfa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-properties-demo-by-ks-wong/ssssspfa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-properties-demo-by-ks-wong/ssssspfa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-properties-demo-by-ks-wong/ssssspfa"/>
      <lastmod>2026-11-02T16:47:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-equation-of-a-line-vs-point-gradient-form/ssssspfc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-equation-of-a-line-vs-point-gradient-form/ssssspfc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-equation-of-a-line-vs-point-gradient-form/ssssspfc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-equation-of-a-line-vs-point-gradient-form/ssssspfc"/>
      <lastmod>2026-11-01T20:44:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-equation-of-a-line-vs-point-gradient-form/ssssspfc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-equation-of-a-line-vs-point-gradient-form/ssssspfc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-equation-of-a-line-vs-point-gradient-form/ssssspfc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-equation-of-a-line-vs-point-gradient-form/ssssspfc"/>
      <lastmod>2026-11-01T20:44:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-two-step-inequalities/ssssspfr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-two-step-inequalities/ssssspfr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-two-step-inequalities/ssssspfr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-two-step-inequalities/ssssspfr"/>
      <lastmod>2026-11-01T23:51:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-two-step-inequalities/ssssspfr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-two-step-inequalities/ssssspfr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-two-step-inequalities/ssssspfr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-two-step-inequalities/ssssspfr"/>
      <lastmod>2026-11-01T23:51:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/useful-ratios-and-charts/ssssspfh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/useful-ratios-and-charts/ssssspfh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/useful-ratios-and-charts/ssssspfh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/useful-ratios-and-charts/ssssspfh"/>
      <lastmod>2026-11-02T15:15:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/useful-ratios-and-charts/ssssspfh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/useful-ratios-and-charts/ssssspfh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/useful-ratios-and-charts/ssssspfh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/useful-ratios-and-charts/ssssspfh"/>
      <lastmod>2026-11-02T15:15:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperboloid-as-a-ruled-surface-dynamic-construction/ssssspft</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperboloid-as-a-ruled-surface-dynamic-construction/ssssspft"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperboloid-as-a-ruled-surface-dynamic-construction/ssssspft"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperboloid-as-a-ruled-surface-dynamic-construction/ssssspft"/>
      <lastmod>2026-11-01T19:24:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperboloid-as-a-ruled-surface-dynamic-construction/ssssspft</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperboloid-as-a-ruled-surface-dynamic-construction/ssssspft"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperboloid-as-a-ruled-surface-dynamic-construction/ssssspft"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperboloid-as-a-ruled-surface-dynamic-construction/ssssspft"/>
      <lastmod>2026-11-01T19:24:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/piecewise-functions-and-confidence-interval/ssssspfx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/piecewise-functions-and-confidence-interval/ssssspfx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/piecewise-functions-and-confidence-interval/ssssspfx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/piecewise-functions-and-confidence-interval/ssssspfx"/>
      <lastmod>2026-11-02T18:57:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/piecewise-functions-and-confidence-interval/ssssspfx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/piecewise-functions-and-confidence-interval/ssssspfx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/piecewise-functions-and-confidence-interval/ssssspfx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/piecewise-functions-and-confidence-interval/ssssspfx"/>
      <lastmod>2026-11-02T18:57:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-demonstration-of-rotational-symmetry/ssssspfi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-demonstration-of-rotational-symmetry/ssssspfi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-demonstration-of-rotational-symmetry/ssssspfi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-demonstration-of-rotational-symmetry/ssssspfi"/>
      <lastmod>2026-11-01T19:38:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-demonstration-of-rotational-symmetry/ssssspfi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-demonstration-of-rotational-symmetry/ssssspfi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-demonstration-of-rotational-symmetry/ssssspfi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-demonstration-of-rotational-symmetry/ssssspfi"/>
      <lastmod>2026-11-01T19:38:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bridget-riley-inspired-optical-art/ssssspfo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bridget-riley-inspired-optical-art/ssssspfo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bridget-riley-inspired-optical-art/ssssspfo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bridget-riley-inspired-optical-art/ssssspfo"/>
      <lastmod>2026-11-01T23:17:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bridget-riley-inspired-optical-art/ssssspfo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bridget-riley-inspired-optical-art/ssssspfo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bridget-riley-inspired-optical-art/ssssspfo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bridget-riley-inspired-optical-art/ssssspfo"/>
      <lastmod>2026-11-01T23:17:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-and-rhombus-construction-by-jedi-algebron/sssssp8s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-and-rhombus-construction-by-jedi-algebron/sssssp8s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-and-rhombus-construction-by-jedi-algebron/sssssp8s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-and-rhombus-construction-by-jedi-algebron/sssssp8s"/>
      <lastmod>2026-11-02T16:39:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-and-rhombus-construction-by-jedi-algebron/sssssp8s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-and-rhombus-construction-by-jedi-algebron/sssssp8s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-and-rhombus-construction-by-jedi-algebron/sssssp8s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-and-rhombus-construction-by-jedi-algebron/sssssp8s"/>
      <lastmod>2026-11-02T16:39:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/snap-to-grid-tutorial/sssssp87</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/snap-to-grid-tutorial/sssssp87"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/snap-to-grid-tutorial/sssssp87"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/snap-to-grid-tutorial/sssssp87"/>
      <lastmod>2026-11-02T02:47:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/snap-to-grid-tutorial/sssssp87</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/snap-to-grid-tutorial/sssssp87"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/snap-to-grid-tutorial/sssssp87"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/snap-to-grid-tutorial/sssssp87"/>
      <lastmod>2026-11-02T02:47:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-and-cosine-functions-by-miguel-bayona/sssssp8n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-and-cosine-functions-by-miguel-bayona/sssssp8n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-and-cosine-functions-by-miguel-bayona/sssssp8n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-and-cosine-functions-by-miguel-bayona/sssssp8n"/>
      <lastmod>2026-11-01T23:14:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-and-cosine-functions-by-miguel-bayona/sssssp8n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-and-cosine-functions-by-miguel-bayona/sssssp8n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-and-cosine-functions-by-miguel-bayona/sssssp8n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-and-cosine-functions-by-miguel-bayona/sssssp8n"/>
      <lastmod>2026-11-01T23:14:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-operations/sssssp82</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-operations/sssssp82"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-operations/sssssp82"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-operations/sssssp82"/>
      <lastmod>2026-11-02T18:16:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-operations/sssssp82</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-operations/sssssp82"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-operations/sssssp82"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-operations/sssssp82"/>
      <lastmod>2026-11-02T18:16:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/voronoi-diagram-example/sssssp8k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/voronoi-diagram-example/sssssp8k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/voronoi-diagram-example/sssssp8k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/voronoi-diagram-example/sssssp8k"/>
      <lastmod>2026-11-01T22:08:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/voronoi-diagram-example/sssssp8k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/voronoi-diagram-example/sssssp8k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/voronoi-diagram-example/sssssp8k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/voronoi-diagram-example/sssssp8k"/>
      <lastmod>2026-11-01T22:08:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/doubling-the-cube/sssssp8z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/doubling-the-cube/sssssp8z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/doubling-the-cube/sssssp8z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/doubling-the-cube/sssssp8z"/>
      <lastmod>2026-11-02T00:16:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/doubling-the-cube/sssssp8z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/doubling-the-cube/sssssp8z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/doubling-the-cube/sssssp8z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/doubling-the-cube/sssssp8z"/>
      <lastmod>2026-11-02T00:16:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-addition-and-subtraction-of-negative-numbers-on-a-number-line/sssssp80</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-addition-and-subtraction-of-negative-numbers-on-a-number-line/sssssp80"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-addition-and-subtraction-of-negative-numbers-on-a-number-line/sssssp80"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-addition-and-subtraction-of-negative-numbers-on-a-number-line/sssssp80"/>
      <lastmod>2026-11-01T21:39:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-addition-and-subtraction-of-negative-numbers-on-a-number-line/sssssp80</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-addition-and-subtraction-of-negative-numbers-on-a-number-line/sssssp80"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-addition-and-subtraction-of-negative-numbers-on-a-number-line/sssssp80"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-addition-and-subtraction-of-negative-numbers-on-a-number-line/sssssp80"/>
      <lastmod>2026-11-01T21:39:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-a-cubic-function/sssssp8d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-a-cubic-function/sssssp8d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-a-cubic-function/sssssp8d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-a-cubic-function/sssssp8d"/>
      <lastmod>2026-11-02T18:17:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-of-a-cubic-function/sssssp8d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-a-cubic-function/sssssp8d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-a-cubic-function/sssssp8d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-a-cubic-function/sssssp8d"/>
      <lastmod>2026-11-02T18:17:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inequalities-in-a-triangle-by-nathan-van-nuys/sssssp8f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inequalities-in-a-triangle-by-nathan-van-nuys/sssssp8f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inequalities-in-a-triangle-by-nathan-van-nuys/sssssp8f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inequalities-in-a-triangle-by-nathan-van-nuys/sssssp8f"/>
      <lastmod>2026-11-02T16:53:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inequalities-in-a-triangle-by-nathan-van-nuys/sssssp8f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inequalities-in-a-triangle-by-nathan-van-nuys/sssssp8f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inequalities-in-a-triangle-by-nathan-van-nuys/sssssp8f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inequalities-in-a-triangle-by-nathan-van-nuys/sssssp8f"/>
      <lastmod>2026-11-02T16:53:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadrilateral-and-its-interior-angles/sssssp88</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-and-its-interior-angles/sssssp88"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-and-its-interior-angles/sssssp88"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-and-its-interior-angles/sssssp88"/>
      <lastmod>2026-11-01T21:21:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadrilateral-and-its-interior-angles/sssssp88</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-and-its-interior-angles/sssssp88"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-and-its-interior-angles/sssssp88"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-and-its-interior-angles/sssssp88"/>
      <lastmod>2026-11-01T21:21:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bjh-poll-simulation-given-population-percent/sssssp8u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bjh-poll-simulation-given-population-percent/sssssp8u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bjh-poll-simulation-given-population-percent/sssssp8u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bjh-poll-simulation-given-population-percent/sssssp8u"/>
      <lastmod>2026-11-02T18:02:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bjh-poll-simulation-given-population-percent/sssssp8u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bjh-poll-simulation-given-population-percent/sssssp8u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bjh-poll-simulation-given-population-percent/sssssp8u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bjh-poll-simulation-given-population-percent/sssssp8u"/>
      <lastmod>2026-11-02T18:02:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-euclid-s-algorithm/sssssp85</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-euclid-s-algorithm/sssssp85"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-euclid-s-algorithm/sssssp85"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-euclid-s-algorithm/sssssp85"/>
      <lastmod>2026-11-01T21:18:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-euclid-s-algorithm/sssssp85</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-euclid-s-algorithm/sssssp85"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-euclid-s-algorithm/sssssp85"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-euclid-s-algorithm/sssssp85"/>
      <lastmod>2026-11-01T21:18:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tom-button-snail/sssssp8b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tom-button-snail/sssssp8b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tom-button-snail/sssssp8b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tom-button-snail/sssssp8b"/>
      <lastmod>2026-11-02T18:24:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tom-button-snail/sssssp8b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tom-button-snail/sssssp8b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tom-button-snail/sssssp8b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tom-button-snail/sssssp8b"/>
      <lastmod>2026-11-02T18:24:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/features-from-valuetables/sssssp83</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/features-from-valuetables/sssssp83"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/features-from-valuetables/sssssp83"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/features-from-valuetables/sssssp83"/>
      <lastmod>2026-11-02T18:53:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/features-from-valuetables/sssssp83</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/features-from-valuetables/sssssp83"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/features-from-valuetables/sssssp83"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/features-from-valuetables/sssssp83"/>
      <lastmod>2026-11-02T18:53:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/creating-a-toblerone-1-with-augmented-reality-demo/sssssp8q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/creating-a-toblerone-1-with-augmented-reality-demo/sssssp8q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/creating-a-toblerone-1-with-augmented-reality-demo/sssssp8q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/creating-a-toblerone-1-with-augmented-reality-demo/sssssp8q"/>
      <lastmod>2026-11-01T21:36:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/creating-a-toblerone-1-with-augmented-reality-demo/sssssp8q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/creating-a-toblerone-1-with-augmented-reality-demo/sssssp8q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/creating-a-toblerone-1-with-augmented-reality-demo/sssssp8q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/creating-a-toblerone-1-with-augmented-reality-demo/sssssp8q"/>
      <lastmod>2026-11-01T21:36:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/richard-orthocenter-dynamic-exploration-of-triangle-orthocenter-and-parametric/sssssp81</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/richard-orthocenter-dynamic-exploration-of-triangle-orthocenter-and-parametric/sssssp81"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/richard-orthocenter-dynamic-exploration-of-triangle-orthocenter-and-parametric/sssssp81"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/richard-orthocenter-dynamic-exploration-of-triangle-orthocenter-and-parametric/sssssp81"/>
      <lastmod>2026-11-02T18:22:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/richard-orthocenter-dynamic-exploration-of-triangle-orthocenter-and-parametric/sssssp81</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/richard-orthocenter-dynamic-exploration-of-triangle-orthocenter-and-parametric/sssssp81"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/richard-orthocenter-dynamic-exploration-of-triangle-orthocenter-and-parametric/sssssp81"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/richard-orthocenter-dynamic-exploration-of-triangle-orthocenter-and-parametric/sssssp81"/>
      <lastmod>2026-11-02T18:22:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/continuous-construction-of-isosceles-triangles-and-geometric-relations/sssssp8m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/continuous-construction-of-isosceles-triangles-and-geometric-relations/sssssp8m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/continuous-construction-of-isosceles-triangles-and-geometric-relations/sssssp8m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/continuous-construction-of-isosceles-triangles-and-geometric-relations/sssssp8m"/>
      <lastmod>2026-11-02T17:57:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/continuous-construction-of-isosceles-triangles-and-geometric-relations/sssssp8m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/continuous-construction-of-isosceles-triangles-and-geometric-relations/sssssp8m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/continuous-construction-of-isosceles-triangles-and-geometric-relations/sssssp8m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/continuous-construction-of-isosceles-triangles-and-geometric-relations/sssssp8m"/>
      <lastmod>2026-11-02T17:57:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/statistics-data-distribution/sssssp8j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/statistics-data-distribution/sssssp8j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/statistics-data-distribution/sssssp8j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/statistics-data-distribution/sssssp8j"/>
      <lastmod>2026-11-01T23:53:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/statistics-data-distribution/sssssp8j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/statistics-data-distribution/sssssp8j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/statistics-data-distribution/sssssp8j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/statistics-data-distribution/sssssp8j"/>
      <lastmod>2026-11-01T23:53:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/single-cone-and-plane-intersection/sssssp8p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/single-cone-and-plane-intersection/sssssp8p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/single-cone-and-plane-intersection/sssssp8p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/single-cone-and-plane-intersection/sssssp8p"/>
      <lastmod>2026-11-01T23:50:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/single-cone-and-plane-intersection/sssssp8p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/single-cone-and-plane-intersection/sssssp8p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/single-cone-and-plane-intersection/sssssp8p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/single-cone-and-plane-intersection/sssssp8p"/>
      <lastmod>2026-11-01T23:50:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prism-light-refraction-demonstration/sssssp8w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-light-refraction-demonstration/sssssp8w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-light-refraction-demonstration/sssssp8w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-light-refraction-demonstration/sssssp8w"/>
      <lastmod>2026-11-02T13:26:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prism-light-refraction-demonstration/sssssp8w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-light-refraction-demonstration/sssssp8w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-light-refraction-demonstration/sssssp8w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-light-refraction-demonstration/sssssp8w"/>
      <lastmod>2026-11-02T13:26:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animation-demonstrating-inequalities-and-geometric-transformations/sssssp86</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-demonstrating-inequalities-and-geometric-transformations/sssssp86"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-demonstrating-inequalities-and-geometric-transformations/sssssp86"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-demonstrating-inequalities-and-geometric-transformations/sssssp86"/>
      <lastmod>2026-11-02T18:19:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animation-demonstrating-inequalities-and-geometric-transformations/sssssp86</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-demonstrating-inequalities-and-geometric-transformations/sssssp86"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-demonstrating-inequalities-and-geometric-transformations/sssssp86"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-demonstrating-inequalities-and-geometric-transformations/sssssp86"/>
      <lastmod>2026-11-02T18:19:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponent-maze-test/sssssp8g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-maze-test/sssssp8g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-maze-test/sssssp8g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-maze-test/sssssp8g"/>
      <lastmod>2026-11-02T17:10:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponent-maze-test/sssssp8g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-maze-test/sssssp8g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-maze-test/sssssp8g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-maze-test/sssssp8g"/>
      <lastmod>2026-11-02T17:10:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-with-given-perimeter-sum-and-angle/sssssp89</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-with-given-perimeter-sum-and-angle/sssssp89"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-with-given-perimeter-sum-and-angle/sssssp89"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-with-given-perimeter-sum-and-angle/sssssp89"/>
      <lastmod>2026-11-02T18:04:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-with-given-perimeter-sum-and-angle/sssssp89</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-with-given-perimeter-sum-and-angle/sssssp89"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-with-given-perimeter-sum-and-angle/sssssp89"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-with-given-perimeter-sum-and-angle/sssssp89"/>
      <lastmod>2026-11-02T18:04:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-cone/sssssp8e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cone/sssssp8e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cone/sssssp8e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cone/sssssp8e"/>
      <lastmod>2026-11-02T17:06:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-cone/sssssp8e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cone/sssssp8e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cone/sssssp8e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cone/sssssp8e"/>
      <lastmod>2026-11-02T17:06:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-of-revolution-line-3d-glasses-effect/sssssp8v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-line-3d-glasses-effect/sssssp8v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-line-3d-glasses-effect/sssssp8v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-line-3d-glasses-effect/sssssp8v"/>
      <lastmod>2026-11-01T19:35:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-of-revolution-line-3d-glasses-effect/sssssp8v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-line-3d-glasses-effect/sssssp8v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-line-3d-glasses-effect/sssssp8v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-line-3d-glasses-effect/sssssp8v"/>
      <lastmod>2026-11-01T19:35:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotational-cone/sssssp84</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-cone/sssssp84"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-cone/sssssp84"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-cone/sssssp84"/>
      <lastmod>2026-11-02T12:33:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotational-cone/sssssp84</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-cone/sssssp84"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-cone/sssssp84"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-cone/sssssp84"/>
      <lastmod>2026-11-02T12:33:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arithmetic-sequences-solve-interactive-practice/sssssp8l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-sequences-solve-interactive-practice/sssssp8l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-sequences-solve-interactive-practice/sssssp8l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-sequences-solve-interactive-practice/sssssp8l"/>
      <lastmod>2026-11-02T00:12:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arithmetic-sequences-solve-interactive-practice/sssssp8l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-sequences-solve-interactive-practice/sssssp8l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-sequences-solve-interactive-practice/sssssp8l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-sequences-solve-interactive-practice/sssssp8l"/>
      <lastmod>2026-11-02T00:12:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-root-function-matcher/sssssp8y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-function-matcher/sssssp8y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-function-matcher/sssssp8y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-function-matcher/sssssp8y"/>
      <lastmod>2026-11-02T07:33:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-root-function-matcher/sssssp8y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-function-matcher/sssssp8y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-function-matcher/sssssp8y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-function-matcher/sssssp8y"/>
      <lastmod>2026-11-02T07:33:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isoptics-of-a-parabola/sssssp8a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isoptics-of-a-parabola/sssssp8a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isoptics-of-a-parabola/sssssp8a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isoptics-of-a-parabola/sssssp8a"/>
      <lastmod>2026-11-02T09:45:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isoptics-of-a-parabola/sssssp8a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isoptics-of-a-parabola/sssssp8a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isoptics-of-a-parabola/sssssp8a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isoptics-of-a-parabola/sssssp8a"/>
      <lastmod>2026-11-02T09:45:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/images-of-f-matrix-transformations/sssssp8c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/images-of-f-matrix-transformations/sssssp8c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/images-of-f-matrix-transformations/sssssp8c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/images-of-f-matrix-transformations/sssssp8c"/>
      <lastmod>2026-11-01T21:37:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/images-of-f-matrix-transformations/sssssp8c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/images-of-f-matrix-transformations/sssssp8c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/images-of-f-matrix-transformations/sssssp8c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/images-of-f-matrix-transformations/sssssp8c"/>
      <lastmod>2026-11-01T21:37:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/midsegments-of-triangles-and-trapezoids-dynamic-geogebra-demo/sssssp8r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/midsegments-of-triangles-and-trapezoids-dynamic-geogebra-demo/sssssp8r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/midsegments-of-triangles-and-trapezoids-dynamic-geogebra-demo/sssssp8r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/midsegments-of-triangles-and-trapezoids-dynamic-geogebra-demo/sssssp8r"/>
      <lastmod>2026-11-01T20:41:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/midsegments-of-triangles-and-trapezoids-dynamic-geogebra-demo/sssssp8r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/midsegments-of-triangles-and-trapezoids-dynamic-geogebra-demo/sssssp8r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/midsegments-of-triangles-and-trapezoids-dynamic-geogebra-demo/sssssp8r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/midsegments-of-triangles-and-trapezoids-dynamic-geogebra-demo/sssssp8r"/>
      <lastmod>2026-11-01T20:41:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-sine-and-tangent-segments/sssssp8h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-sine-and-tangent-segments/sssssp8h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-sine-and-tangent-segments/sssssp8h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-sine-and-tangent-segments/sssssp8h"/>
      <lastmod>2026-11-02T17:39:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-sine-and-tangent-segments/sssssp8h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-sine-and-tangent-segments/sssssp8h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-sine-and-tangent-segments/sssssp8h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-sine-and-tangent-segments/sssssp8h"/>
      <lastmod>2026-11-02T17:39:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spiral-ramp-parametric-equation/sssssp8t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-ramp-parametric-equation/sssssp8t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-ramp-parametric-equation/sssssp8t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-ramp-parametric-equation/sssssp8t"/>
      <lastmod>2026-11-02T17:53:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spiral-ramp-parametric-equation/sssssp8t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-ramp-parametric-equation/sssssp8t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-ramp-parametric-equation/sssssp8t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-ramp-parametric-equation/sssssp8t"/>
      <lastmod>2026-11-02T17:53:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-parametrization-of-a-line/sssssp8x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-parametrization-of-a-line/sssssp8x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-parametrization-of-a-line/sssssp8x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-parametrization-of-a-line/sssssp8x"/>
      <lastmod>2026-11-02T18:30:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-parametrization-of-a-line/sssssp8x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-parametrization-of-a-line/sssssp8x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-parametrization-of-a-line/sssssp8x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-parametrization-of-a-line/sssssp8x"/>
      <lastmod>2026-11-02T18:30:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spiral-sofia-s/sssssp8i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-sofia-s/sssssp8i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-sofia-s/sssssp8i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-sofia-s/sssssp8i"/>
      <lastmod>2026-11-01T22:00:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spiral-sofia-s/sssssp8i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-sofia-s/sssssp8i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-sofia-s/sssssp8i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-sofia-s/sssssp8i"/>
      <lastmod>2026-11-01T22:00:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/longitudinal-wave-demonstration/sssssp8o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/longitudinal-wave-demonstration/sssssp8o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/longitudinal-wave-demonstration/sssssp8o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/longitudinal-wave-demonstration/sssssp8o"/>
      <lastmod>2026-11-01T23:28:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/longitudinal-wave-demonstration/sssssp8o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/longitudinal-wave-demonstration/sssssp8o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/longitudinal-wave-demonstration/sssssp8o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/longitudinal-wave-demonstration/sssssp8o"/>
      <lastmod>2026-11-01T23:28:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angry-birds-quadratic-game-stage-2/ssssspus</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angry-birds-quadratic-game-stage-2/ssssspus"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angry-birds-quadratic-game-stage-2/ssssspus"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angry-birds-quadratic-game-stage-2/ssssspus"/>
      <lastmod>2026-11-01T21:13:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angry-birds-quadratic-game-stage-2/ssssspus</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angry-birds-quadratic-game-stage-2/ssssspus"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angry-birds-quadratic-game-stage-2/ssssspus"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angry-birds-quadratic-game-stage-2/ssssspus"/>
      <lastmod>2026-11-01T21:13:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-rory-geoghegan/ssssspu7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-rory-geoghegan/ssssspu7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-rory-geoghegan/ssssspu7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-rory-geoghegan/ssssspu7"/>
      <lastmod>2026-11-02T02:50:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-rory-geoghegan/ssssspu7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-rory-geoghegan/ssssspu7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-rory-geoghegan/ssssspu7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-rory-geoghegan/ssssspu7"/>
      <lastmod>2026-11-02T02:50:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/folding-and-unfolding-a-net/ssssspun</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/folding-and-unfolding-a-net/ssssspun"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/folding-and-unfolding-a-net/ssssspun"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/folding-and-unfolding-a-net/ssssspun"/>
      <lastmod>2026-11-01T22:12:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/folding-and-unfolding-a-net/ssssspun</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/folding-and-unfolding-a-net/ssssspun"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/folding-and-unfolding-a-net/ssssspun"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/folding-and-unfolding-a-net/ssssspun"/>
      <lastmod>2026-11-01T22:12:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/jurriaan-schrofer-rectangle-circle-construction/ssssspu2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/jurriaan-schrofer-rectangle-circle-construction/ssssspu2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/jurriaan-schrofer-rectangle-circle-construction/ssssspu2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/jurriaan-schrofer-rectangle-circle-construction/ssssspu2"/>
      <lastmod>2026-11-02T15:16:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/jurriaan-schrofer-rectangle-circle-construction/ssssspu2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/jurriaan-schrofer-rectangle-circle-construction/ssssspu2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/jurriaan-schrofer-rectangle-circle-construction/ssssspu2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/jurriaan-schrofer-rectangle-circle-construction/ssssspu2"/>
      <lastmod>2026-11-02T15:16:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotational-symmetry-of-regular-polygons/ssssspuk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-regular-polygons/ssssspuk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-of-regular-polygons/ssssspuk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-regular-polygons/ssssspuk"/>
      <lastmod>2026-11-01T21:18:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotational-symmetry-of-regular-polygons/ssssspuk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-regular-polygons/ssssspuk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-of-regular-polygons/ssssspuk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-of-regular-polygons/ssssspuk"/>
      <lastmod>2026-11-01T21:18:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/design-adapt-games-and-puzzles/ssssspuz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/design-adapt-games-and-puzzles/ssssspuz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/design-adapt-games-and-puzzles/ssssspuz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/design-adapt-games-and-puzzles/ssssspuz"/>
      <lastmod>2026-11-01T23:20:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/design-adapt-games-and-puzzles/ssssspuz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/design-adapt-games-and-puzzles/ssssspuz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/design-adapt-games-and-puzzles/ssssspuz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/design-adapt-games-and-puzzles/ssssspuz"/>
      <lastmod>2026-11-01T23:20:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/double-cone-sphere-construction/ssssspu0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-cone-sphere-construction/ssssspu0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-cone-sphere-construction/ssssspu0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-cone-sphere-construction/ssssspu0"/>
      <lastmod>2026-11-02T18:28:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/double-cone-sphere-construction/ssssspu0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-cone-sphere-construction/ssssspu0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-cone-sphere-construction/ssssspu0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-cone-sphere-construction/ssssspu0"/>
      <lastmod>2026-11-02T18:28:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometry-construction-example-triangle-and-centers/ssssspud</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometry-construction-example-triangle-and-centers/ssssspud"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometry-construction-example-triangle-and-centers/ssssspud"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometry-construction-example-triangle-and-centers/ssssspud"/>
      <lastmod>2026-11-01T23:26:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometry-construction-example-triangle-and-centers/ssssspud</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometry-construction-example-triangle-and-centers/ssssspud"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometry-construction-example-triangle-and-centers/ssssspud"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometry-construction-example-triangle-and-centers/ssssspud"/>
      <lastmod>2026-11-01T23:26:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/congruent-segments-construction-exercise/ssssspuf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruent-segments-construction-exercise/ssssspuf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruent-segments-construction-exercise/ssssspuf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruent-segments-construction-exercise/ssssspuf"/>
      <lastmod>2026-11-01T21:39:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/congruent-segments-construction-exercise/ssssspuf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruent-segments-construction-exercise/ssssspuf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruent-segments-construction-exercise/ssssspuf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruent-segments-construction-exercise/ssssspuf"/>
      <lastmod>2026-11-01T21:39:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-addition-by-james-monaghan/ssssspu8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-by-james-monaghan/ssssspu8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-by-james-monaghan/ssssspu8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-by-james-monaghan/ssssspu8"/>
      <lastmod>2026-11-02T18:05:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-addition-by-james-monaghan/ssssspu8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-by-james-monaghan/ssssspu8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-by-james-monaghan/ssssspu8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-by-james-monaghan/ssssspu8"/>
      <lastmod>2026-11-02T18:05:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-properties-demo/ssssspuu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-properties-demo/ssssspuu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-properties-demo/ssssspuu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-properties-demo/ssssspuu"/>
      <lastmod>2026-11-02T17:43:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-properties-demo/ssssspuu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-properties-demo/ssssspuu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-properties-demo/ssssspuu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-properties-demo/ssssspuu"/>
      <lastmod>2026-11-02T17:43:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/find-the-equation-of-a-perpendicular-line-using-intercepts/ssssspu5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-the-equation-of-a-perpendicular-line-using-intercepts/ssssspu5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-the-equation-of-a-perpendicular-line-using-intercepts/ssssspu5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-the-equation-of-a-perpendicular-line-using-intercepts/ssssspu5"/>
      <lastmod>2026-11-01T21:12:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/find-the-equation-of-a-perpendicular-line-using-intercepts/ssssspu5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-the-equation-of-a-perpendicular-line-using-intercepts/ssssspu5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-the-equation-of-a-perpendicular-line-using-intercepts/ssssspu5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-the-equation-of-a-perpendicular-line-using-intercepts/ssssspu5"/>
      <lastmod>2026-11-01T21:12:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-geogebra-geometry-app/ssssspub</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-geogebra-geometry-app/ssssspub"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-geogebra-geometry-app/ssssspub"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-geogebra-geometry-app/ssssspub"/>
      <lastmod>2026-11-01T23:23:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-geogebra-geometry-app/ssssspub</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-geogebra-geometry-app/ssssspub"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-geogebra-geometry-app/ssssspub"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-geogebra-geometry-app/ssssspub"/>
      <lastmod>2026-11-01T23:23:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/correlation-and-coordinate-geometry/ssssspu3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/correlation-and-coordinate-geometry/ssssspu3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/correlation-and-coordinate-geometry/ssssspu3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/correlation-and-coordinate-geometry/ssssspu3"/>
      <lastmod>2026-11-01T23:58:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/correlation-and-coordinate-geometry/ssssspu3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/correlation-and-coordinate-geometry/ssssspu3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/correlation-and-coordinate-geometry/ssssspu3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/correlation-and-coordinate-geometry/ssssspu3"/>
      <lastmod>2026-11-01T23:58:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/maximum-volume-of-a-box/ssssspuq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximum-volume-of-a-box/ssssspuq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximum-volume-of-a-box/ssssspuq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximum-volume-of-a-box/ssssspuq"/>
      <lastmod>2026-11-01T23:33:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/maximum-volume-of-a-box/ssssspuq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximum-volume-of-a-box/ssssspuq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximum-volume-of-a-box/ssssspuq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximum-volume-of-a-box/ssssspuq"/>
      <lastmod>2026-11-01T23:33:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-polygonal-billiards/ssssspu1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-polygonal-billiards/ssssspu1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-polygonal-billiards/ssssspu1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-polygonal-billiards/ssssspu1"/>
      <lastmod>2026-11-01T19:10:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-polygonal-billiards/ssssspu1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-polygonal-billiards/ssssspu1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-polygonal-billiards/ssssspu1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-polygonal-billiards/ssssspu1"/>
      <lastmod>2026-11-01T19:10:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inequalities-focusing-on-change-tangent-secant-and-parabola/ssssspum</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inequalities-focusing-on-change-tangent-secant-and-parabola/ssssspum"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inequalities-focusing-on-change-tangent-secant-and-parabola/ssssspum"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inequalities-focusing-on-change-tangent-secant-and-parabola/ssssspum"/>
      <lastmod>2026-11-01T19:17:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inequalities-focusing-on-change-tangent-secant-and-parabola/ssssspum</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inequalities-focusing-on-change-tangent-secant-and-parabola/ssssspum"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inequalities-focusing-on-change-tangent-secant-and-parabola/ssssspum"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inequalities-focusing-on-change-tangent-secant-and-parabola/ssssspum"/>
      <lastmod>2026-11-01T19:17:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/find-the-surface/ssssspuj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-the-surface/ssssspuj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-the-surface/ssssspuj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-the-surface/ssssspuj"/>
      <lastmod>2026-11-01T19:04:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/find-the-surface/ssssspuj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-the-surface/ssssspuj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-the-surface/ssssspuj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-the-surface/ssssspuj"/>
      <lastmod>2026-11-01T19:04:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/crossed-trough-views/ssssspup</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/crossed-trough-views/ssssspup"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/crossed-trough-views/ssssspup"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/crossed-trough-views/ssssspup"/>
      <lastmod>2026-11-01T19:23:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/crossed-trough-views/ssssspup</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/crossed-trough-views/ssssspup"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/crossed-trough-views/ssssspup"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/crossed-trough-views/ssssspup"/>
      <lastmod>2026-11-01T19:23:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/continuity-equation-demonstration/ssssspuw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/continuity-equation-demonstration/ssssspuw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/continuity-equation-demonstration/ssssspuw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/continuity-equation-demonstration/ssssspuw"/>
      <lastmod>2026-11-02T15:50:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/continuity-equation-demonstration/ssssspuw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/continuity-equation-demonstration/ssssspuw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/continuity-equation-demonstration/ssssspuw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/continuity-equation-demonstration/ssssspuw"/>
      <lastmod>2026-11-02T15:50:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bdg-pool-table-geometric-construction/ssssspu6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bdg-pool-table-geometric-construction/ssssspu6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bdg-pool-table-geometric-construction/ssssspu6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bdg-pool-table-geometric-construction/ssssspu6"/>
      <lastmod>2026-11-02T13:49:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bdg-pool-table-geometric-construction/ssssspu6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bdg-pool-table-geometric-construction/ssssspu6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bdg-pool-table-geometric-construction/ssssspu6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bdg-pool-table-geometric-construction/ssssspu6"/>
      <lastmod>2026-11-02T13:49:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-right-triangles-by-bradley-miller/ssssspug</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-right-triangles-by-bradley-miller/ssssspug"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-right-triangles-by-bradley-miller/ssssspug"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-right-triangles-by-bradley-miller/ssssspug"/>
      <lastmod>2026-11-02T13:37:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-right-triangles-by-bradley-miller/ssssspug</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-right-triangles-by-bradley-miller/ssssspug"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-right-triangles-by-bradley-miller/ssssspug"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-right-triangles-by-bradley-miller/ssssspug"/>
      <lastmod>2026-11-02T13:37:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-the-sum-of-triangular-numbers/ssssspu9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-sum-of-triangular-numbers/ssssspu9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-sum-of-triangular-numbers/ssssspu9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-sum-of-triangular-numbers/ssssspu9"/>
      <lastmod>2026-11-02T18:36:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-the-sum-of-triangular-numbers/ssssspu9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-sum-of-triangular-numbers/ssssspu9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-sum-of-triangular-numbers/ssssspu9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-sum-of-triangular-numbers/ssssspu9"/>
      <lastmod>2026-11-02T18:36:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-transformations-and-polygon-construction-animation/ssssspue</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-polygon-construction-animation/ssssspue"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-and-polygon-construction-animation/ssssspue"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-polygon-construction-animation/ssssspue"/>
      <lastmod>2026-11-02T11:57:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-transformations-and-polygon-construction-animation/ssssspue</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-polygon-construction-animation/ssssspue"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-and-polygon-construction-animation/ssssspue"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-polygon-construction-animation/ssssspue"/>
      <lastmod>2026-11-02T11:57:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/holiday-fun-2-cylinder-and-inequalities/ssssspuv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/holiday-fun-2-cylinder-and-inequalities/ssssspuv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/holiday-fun-2-cylinder-and-inequalities/ssssspuv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/holiday-fun-2-cylinder-and-inequalities/ssssspuv"/>
      <lastmod>2026-11-02T17:50:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/holiday-fun-2-cylinder-and-inequalities/ssssspuv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/holiday-fun-2-cylinder-and-inequalities/ssssspuv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/holiday-fun-2-cylinder-and-inequalities/ssssspuv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/holiday-fun-2-cylinder-and-inequalities/ssssspuv"/>
      <lastmod>2026-11-02T17:50:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-numbers-quiz-level-3/ssssspu4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-numbers-quiz-level-3/ssssspu4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-numbers-quiz-level-3/ssssspu4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-numbers-quiz-level-3/ssssspu4"/>
      <lastmod>2026-11-02T17:57:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-numbers-quiz-level-3/ssssspu4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-numbers-quiz-level-3/ssssspu4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-numbers-quiz-level-3/ssssspu4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-numbers-quiz-level-3/ssssspu4"/>
      <lastmod>2026-11-02T17:57:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/maximum-volume-of-a-cylinder-cut-from-a-sphere/ssssspul</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximum-volume-of-a-cylinder-cut-from-a-sphere/ssssspul"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximum-volume-of-a-cylinder-cut-from-a-sphere/ssssspul"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximum-volume-of-a-cylinder-cut-from-a-sphere/ssssspul"/>
      <lastmod>2026-11-01T23:42:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/maximum-volume-of-a-cylinder-cut-from-a-sphere/ssssspul</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximum-volume-of-a-cylinder-cut-from-a-sphere/ssssspul"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximum-volume-of-a-cylinder-cut-from-a-sphere/ssssspul"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximum-volume-of-a-cylinder-cut-from-a-sphere/ssssspul"/>
      <lastmod>2026-11-01T23:42:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/play-chomp-example/ssssspuy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/play-chomp-example/ssssspuy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/play-chomp-example/ssssspuy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/play-chomp-example/ssssspuy"/>
      <lastmod>2026-11-02T13:28:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/play-chomp-example/ssssspuy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/play-chomp-example/ssssspuy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/play-chomp-example/ssssspuy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/play-chomp-example/ssssspuy"/>
      <lastmod>2026-11-02T13:28:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/liu-hui-s-pyramid-volume-proof/ssssspua</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/liu-hui-s-pyramid-volume-proof/ssssspua"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/liu-hui-s-pyramid-volume-proof/ssssspua"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/liu-hui-s-pyramid-volume-proof/ssssspua"/>
      <lastmod>2026-11-02T18:04:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/liu-hui-s-pyramid-volume-proof/ssssspua</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/liu-hui-s-pyramid-volume-proof/ssssspua"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/liu-hui-s-pyramid-volume-proof/ssssspua"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/liu-hui-s-pyramid-volume-proof/ssssspua"/>
      <lastmod>2026-11-02T18:04:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lcm-and-gcd-venn-diagram/ssssspuc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lcm-and-gcd-venn-diagram/ssssspuc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lcm-and-gcd-venn-diagram/ssssspuc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lcm-and-gcd-venn-diagram/ssssspuc"/>
      <lastmod>2026-11-02T16:57:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lcm-and-gcd-venn-diagram/ssssspuc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lcm-and-gcd-venn-diagram/ssssspuc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lcm-and-gcd-venn-diagram/ssssspuc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lcm-and-gcd-venn-diagram/ssssspuc"/>
      <lastmod>2026-11-02T16:57:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/systems-of-inequalities-graphing/ssssspur</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/systems-of-inequalities-graphing/ssssspur"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/systems-of-inequalities-graphing/ssssspur"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/systems-of-inequalities-graphing/ssssspur"/>
      <lastmod>2026-11-01T20:41:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/systems-of-inequalities-graphing/ssssspur</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/systems-of-inequalities-graphing/ssssspur"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/systems-of-inequalities-graphing/ssssspur"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/systems-of-inequalities-graphing/ssssspur"/>
      <lastmod>2026-11-01T20:41:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/composition-of-reflections/ssssspuh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/composition-of-reflections/ssssspuh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/composition-of-reflections/ssssspuh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/composition-of-reflections/ssssspuh"/>
      <lastmod>2026-11-02T18:00:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/composition-of-reflections/ssssspuh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/composition-of-reflections/ssssspuh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/composition-of-reflections/ssssspuh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/composition-of-reflections/ssssspuh"/>
      <lastmod>2026-11-02T18:00:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-any-linear-equation-with-geogebra/sssssput</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-any-linear-equation-with-geogebra/sssssput"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-any-linear-equation-with-geogebra/sssssput"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-any-linear-equation-with-geogebra/sssssput"/>
      <lastmod>2026-11-02T10:37:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-any-linear-equation-with-geogebra/sssssput</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-any-linear-equation-with-geogebra/sssssput"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-any-linear-equation-with-geogebra/sssssput"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-any-linear-equation-with-geogebra/sssssput"/>
      <lastmod>2026-11-02T10:37:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-8-3-11-equations-of-all-kinds-of-lines/ssssspux</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-8-3-11-equations-of-all-kinds-of-lines/ssssspux"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-8-3-11-equations-of-all-kinds-of-lines/ssssspux"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-8-3-11-equations-of-all-kinds-of-lines/ssssspux"/>
      <lastmod>2026-11-02T10:38:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-8-3-11-equations-of-all-kinds-of-lines/ssssspux</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-8-3-11-equations-of-all-kinds-of-lines/ssssspux"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-8-3-11-equations-of-all-kinds-of-lines/ssssspux"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-8-3-11-equations-of-all-kinds-of-lines/ssssspux"/>
      <lastmod>2026-11-02T10:38:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logarithmic-scale/ssssspui</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-scale/ssssspui"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-scale/ssssspui"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-scale/ssssspui"/>
      <lastmod>2026-11-01T21:41:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logarithmic-scale/ssssspui</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-scale/ssssspui"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-scale/ssssspui"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-scale/ssssspui"/>
      <lastmod>2026-11-01T21:41:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-rotational-solids-simulation/ssssspuo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-rotational-solids-simulation/ssssspuo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-rotational-solids-simulation/ssssspuo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-rotational-solids-simulation/ssssspuo"/>
      <lastmod>2026-11-02T17:45:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-rotational-solids-simulation/ssssspuo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-rotational-solids-simulation/ssssspuo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-rotational-solids-simulation/ssssspuo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-rotational-solids-simulation/ssssspuo"/>
      <lastmod>2026-11-02T17:45:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-complex-roots-of-polynomials/sssssp5s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-complex-roots-of-polynomials/sssssp5s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-complex-roots-of-polynomials/sssssp5s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-complex-roots-of-polynomials/sssssp5s"/>
      <lastmod>2026-11-02T16:29:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-complex-roots-of-polynomials/sssssp5s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-complex-roots-of-polynomials/sssssp5s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-complex-roots-of-polynomials/sssssp5s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-complex-roots-of-polynomials/sssssp5s"/>
      <lastmod>2026-11-02T16:29:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drawing-a-parabola-given-a-focus-and-directrix/sssssp57</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-a-parabola-given-a-focus-and-directrix/sssssp57"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-a-parabola-given-a-focus-and-directrix/sssssp57"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-a-parabola-given-a-focus-and-directrix/sssssp57"/>
      <lastmod>2026-11-01T21:49:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drawing-a-parabola-given-a-focus-and-directrix/sssssp57</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-a-parabola-given-a-focus-and-directrix/sssssp57"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-a-parabola-given-a-focus-and-directrix/sssssp57"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-a-parabola-given-a-focus-and-directrix/sssssp57"/>
      <lastmod>2026-11-01T21:49:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-dot-product-distributive-law-demo/sssssp5n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-dot-product-distributive-law-demo/sssssp5n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-dot-product-distributive-law-demo/sssssp5n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-dot-product-distributive-law-demo/sssssp5n"/>
      <lastmod>2026-11-01T21:54:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-dot-product-distributive-law-demo/sssssp5n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-dot-product-distributive-law-demo/sssssp5n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-dot-product-distributive-law-demo/sssssp5n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-dot-product-distributive-law-demo/sssssp5n"/>
      <lastmod>2026-11-01T21:54:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-normal-and-binormal-vectors-at-a-point-on-a-curve/sssssp52</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-normal-and-binormal-vectors-at-a-point-on-a-curve/sssssp52"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-normal-and-binormal-vectors-at-a-point-on-a-curve/sssssp52"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-normal-and-binormal-vectors-at-a-point-on-a-curve/sssssp52"/>
      <lastmod>2026-11-01T19:10:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-normal-and-binormal-vectors-at-a-point-on-a-curve/sssssp52</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-normal-and-binormal-vectors-at-a-point-on-a-curve/sssssp52"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-normal-and-binormal-vectors-at-a-point-on-a-curve/sssssp52"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-normal-and-binormal-vectors-at-a-point-on-a-curve/sssssp52"/>
      <lastmod>2026-11-01T19:10:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-showing-coordinates-of-certain-points-by-huzefa/sssssp5k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-showing-coordinates-of-certain-points-by-huzefa/sssssp5k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-showing-coordinates-of-certain-points-by-huzefa/sssssp5k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-showing-coordinates-of-certain-points-by-huzefa/sssssp5k"/>
      <lastmod>2026-11-02T02:21:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-showing-coordinates-of-certain-points-by-huzefa/sssssp5k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-showing-coordinates-of-certain-points-by-huzefa/sssssp5k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-showing-coordinates-of-certain-points-by-huzefa/sssssp5k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-showing-coordinates-of-certain-points-by-huzefa/sssssp5k"/>
      <lastmod>2026-11-02T02:21:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conic-sections-hyperbola-dynamic-construction-and-exploration/sssssp5z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-sections-hyperbola-dynamic-construction-and-exploration/sssssp5z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-sections-hyperbola-dynamic-construction-and-exploration/sssssp5z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-hyperbola-dynamic-construction-and-exploration/sssssp5z"/>
      <lastmod>2026-11-02T18:30:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conic-sections-hyperbola-dynamic-construction-and-exploration/sssssp5z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-sections-hyperbola-dynamic-construction-and-exploration/sssssp5z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-sections-hyperbola-dynamic-construction-and-exploration/sssssp5z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-hyperbola-dynamic-construction-and-exploration/sssssp5z"/>
      <lastmod>2026-11-02T18:30:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/envelope-of-circles-of-radius-1-2-centered-on-an-astroid/sssssp50</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/envelope-of-circles-of-radius-1-2-centered-on-an-astroid/sssssp50"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/envelope-of-circles-of-radius-1-2-centered-on-an-astroid/sssssp50"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/envelope-of-circles-of-radius-1-2-centered-on-an-astroid/sssssp50"/>
      <lastmod>2026-11-01T19:24:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/envelope-of-circles-of-radius-1-2-centered-on-an-astroid/sssssp50</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/envelope-of-circles-of-radius-1-2-centered-on-an-astroid/sssssp50"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/envelope-of-circles-of-radius-1-2-centered-on-an-astroid/sssssp50"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/envelope-of-circles-of-radius-1-2-centered-on-an-astroid/sssssp50"/>
      <lastmod>2026-11-01T19:24:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/removing-the-hole-in-function-graphs/sssssp5d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/removing-the-hole-in-function-graphs/sssssp5d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/removing-the-hole-in-function-graphs/sssssp5d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/removing-the-hole-in-function-graphs/sssssp5d"/>
      <lastmod>2026-11-02T17:52:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/removing-the-hole-in-function-graphs/sssssp5d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/removing-the-hole-in-function-graphs/sssssp5d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/removing-the-hole-in-function-graphs/sssssp5d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/removing-the-hole-in-function-graphs/sssssp5d"/>
      <lastmod>2026-11-02T17:52:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotated-semicircles/sssssp5f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotated-semicircles/sssssp5f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotated-semicircles/sssssp5f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotated-semicircles/sssssp5f"/>
      <lastmod>2026-11-02T16:36:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotated-semicircles/sssssp5f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotated-semicircles/sssssp5f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotated-semicircles/sssssp5f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotated-semicircles/sssssp5f"/>
      <lastmod>2026-11-02T16:36:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gradient-and-directional-derivatives-demo/sssssp58</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gradient-and-directional-derivatives-demo/sssssp58"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gradient-and-directional-derivatives-demo/sssssp58"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gradient-and-directional-derivatives-demo/sssssp58"/>
      <lastmod>2026-11-02T08:49:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gradient-and-directional-derivatives-demo/sssssp58</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gradient-and-directional-derivatives-demo/sssssp58"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gradient-and-directional-derivatives-demo/sssssp58"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gradient-and-directional-derivatives-demo/sssssp58"/>
      <lastmod>2026-11-02T08:49:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-planes-and-normal-lines-mth-254-module-5-tech-lab/sssssp5u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-planes-and-normal-lines-mth-254-module-5-tech-lab/sssssp5u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-planes-and-normal-lines-mth-254-module-5-tech-lab/sssssp5u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-planes-and-normal-lines-mth-254-module-5-tech-lab/sssssp5u"/>
      <lastmod>2026-11-01T19:28:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-planes-and-normal-lines-mth-254-module-5-tech-lab/sssssp5u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-planes-and-normal-lines-mth-254-module-5-tech-lab/sssssp5u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-planes-and-normal-lines-mth-254-module-5-tech-lab/sssssp5u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-planes-and-normal-lines-mth-254-module-5-tech-lab/sssssp5u"/>
      <lastmod>2026-11-01T19:28:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coin-template/sssssp55</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coin-template/sssssp55"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coin-template/sssssp55"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coin-template/sssssp55"/>
      <lastmod>2026-11-01T20:17:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coin-template/sssssp55</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coin-template/sssssp55"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coin-template/sssssp55"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coin-template/sssssp55"/>
      <lastmod>2026-11-01T20:17:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sss-triangle-congruence-exploration/sssssp5b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-triangle-congruence-exploration/sssssp5b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-triangle-congruence-exploration/sssssp5b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-triangle-congruence-exploration/sssssp5b"/>
      <lastmod>2026-11-02T00:50:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sss-triangle-congruence-exploration/sssssp5b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-triangle-congruence-exploration/sssssp5b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-triangle-congruence-exploration/sssssp5b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-triangle-congruence-exploration/sssssp5b"/>
      <lastmod>2026-11-02T00:50:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-a-system-of-equations/sssssp53</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-a-system-of-equations/sssssp53"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-a-system-of-equations/sssssp53"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-a-system-of-equations/sssssp53"/>
      <lastmod>2026-11-01T21:56:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-a-system-of-equations/sssssp53</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-a-system-of-equations/sssssp53"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-a-system-of-equations/sssssp53"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-a-system-of-equations/sssssp53"/>
      <lastmod>2026-11-01T21:56:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/confidence-interval-calculator-using-t-distribution/sssssp5q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/confidence-interval-calculator-using-t-distribution/sssssp5q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/confidence-interval-calculator-using-t-distribution/sssssp5q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/confidence-interval-calculator-using-t-distribution/sssssp5q"/>
      <lastmod>2026-11-01T23:55:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/confidence-interval-calculator-using-t-distribution/sssssp5q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/confidence-interval-calculator-using-t-distribution/sssssp5q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/confidence-interval-calculator-using-t-distribution/sssssp5q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/confidence-interval-calculator-using-t-distribution/sssssp5q"/>
      <lastmod>2026-11-01T23:55:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-dilations-in-the-coordinate-plane/sssssp51</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-dilations-in-the-coordinate-plane/sssssp51"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-dilations-in-the-coordinate-plane/sssssp51"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-dilations-in-the-coordinate-plane/sssssp51"/>
      <lastmod>2026-11-01T21:08:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-dilations-in-the-coordinate-plane/sssssp51</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-dilations-in-the-coordinate-plane/sssssp51"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-dilations-in-the-coordinate-plane/sssssp51"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-dilations-in-the-coordinate-plane/sssssp51"/>
      <lastmod>2026-11-01T21:08:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-demonstration-of-complex-multiplication/sssssp5m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-demonstration-of-complex-multiplication/sssssp5m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-demonstration-of-complex-multiplication/sssssp5m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-demonstration-of-complex-multiplication/sssssp5m"/>
      <lastmod>2026-11-02T17:02:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-demonstration-of-complex-multiplication/sssssp5m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-demonstration-of-complex-multiplication/sssssp5m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-demonstration-of-complex-multiplication/sssssp5m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-demonstration-of-complex-multiplication/sssssp5m"/>
      <lastmod>2026-11-02T17:02:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sum-of-the-first-n-odd-numbers-geometric-proof/sssssp5j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-the-first-n-odd-numbers-geometric-proof/sssssp5j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-the-first-n-odd-numbers-geometric-proof/sssssp5j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-the-first-n-odd-numbers-geometric-proof/sssssp5j"/>
      <lastmod>2026-11-02T10:40:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sum-of-the-first-n-odd-numbers-geometric-proof/sssssp5j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-the-first-n-odd-numbers-geometric-proof/sssssp5j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-the-first-n-odd-numbers-geometric-proof/sssssp5j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-the-first-n-odd-numbers-geometric-proof/sssssp5j"/>
      <lastmod>2026-11-02T10:40:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/islamic-geometric-patterns-construction/sssssp5p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-geometric-patterns-construction/sssssp5p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-geometric-patterns-construction/sssssp5p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-geometric-patterns-construction/sssssp5p"/>
      <lastmod>2026-11-01T19:35:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/islamic-geometric-patterns-construction/sssssp5p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-geometric-patterns-construction/sssssp5p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-geometric-patterns-construction/sssssp5p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-geometric-patterns-construction/sssssp5p"/>
      <lastmod>2026-11-01T19:35:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/valentine-s-day-heart-curve/sssssp5w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/valentine-s-day-heart-curve/sssssp5w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/valentine-s-day-heart-curve/sssssp5w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/valentine-s-day-heart-curve/sssssp5w"/>
      <lastmod>2026-11-01T19:20:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/valentine-s-day-heart-curve/sssssp5w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/valentine-s-day-heart-curve/sssssp5w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/valentine-s-day-heart-curve/sssssp5w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/valentine-s-day-heart-curve/sssssp5w"/>
      <lastmod>2026-11-01T19:20:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/oblique-cylinder-by-n-roach-2/sssssp56</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-cylinder-by-n-roach-2/sssssp56"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-cylinder-by-n-roach-2/sssssp56"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-cylinder-by-n-roach-2/sssssp56"/>
      <lastmod>2026-11-02T18:19:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/oblique-cylinder-by-n-roach-2/sssssp56</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-cylinder-by-n-roach-2/sssssp56"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-cylinder-by-n-roach-2/sssssp56"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-cylinder-by-n-roach-2/sssssp56"/>
      <lastmod>2026-11-02T18:19:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractions-and-unit-part-1/sssssp5g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-and-unit-part-1/sssssp5g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-and-unit-part-1/sssssp5g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-and-unit-part-1/sssssp5g"/>
      <lastmod>2026-11-01T19:13:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractions-and-unit-part-1/sssssp5g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-and-unit-part-1/sssssp5g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-and-unit-part-1/sssssp5g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-and-unit-part-1/sssssp5g"/>
      <lastmod>2026-11-01T19:13:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perimeter-of-irregular-shapes-by-kong-chan/sssssp59</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-of-irregular-shapes-by-kong-chan/sssssp59"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-of-irregular-shapes-by-kong-chan/sssssp59"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-of-irregular-shapes-by-kong-chan/sssssp59"/>
      <lastmod>2026-11-02T00:02:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perimeter-of-irregular-shapes-by-kong-chan/sssssp59</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-of-irregular-shapes-by-kong-chan/sssssp59"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-of-irregular-shapes-by-kong-chan/sssssp59"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-of-irregular-shapes-by-kong-chan/sssssp59"/>
      <lastmod>2026-11-02T00:02:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/stereographic-projection/sssssp5e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/stereographic-projection/sssssp5e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/stereographic-projection/sssssp5e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/stereographic-projection/sssssp5e"/>
      <lastmod>2026-11-02T03:18:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/stereographic-projection/sssssp5e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/stereographic-projection/sssssp5e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/stereographic-projection/sssssp5e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/stereographic-projection/sssssp5e"/>
      <lastmod>2026-11-02T03:18:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-motion-in-two-dimensions/sssssp5v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-motion-in-two-dimensions/sssssp5v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-motion-in-two-dimensions/sssssp5v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-motion-in-two-dimensions/sssssp5v"/>
      <lastmod>2026-11-02T17:36:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-motion-in-two-dimensions/sssssp5v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-motion-in-two-dimensions/sssssp5v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-motion-in-two-dimensions/sssssp5v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-motion-in-two-dimensions/sssssp5v"/>
      <lastmod>2026-11-02T17:36:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-representation-of-linear-equations-in-two-variables/sssssp54</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-representation-of-linear-equations-in-two-variables/sssssp54"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-representation-of-linear-equations-in-two-variables/sssssp54"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-representation-of-linear-equations-in-two-variables/sssssp54"/>
      <lastmod>2026-11-02T16:41:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-representation-of-linear-equations-in-two-variables/sssssp54</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-representation-of-linear-equations-in-two-variables/sssssp54"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-representation-of-linear-equations-in-two-variables/sssssp54"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-representation-of-linear-equations-in-two-variables/sssssp54"/>
      <lastmod>2026-11-02T16:41:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/energy-diagram-demo/sssssp5l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/energy-diagram-demo/sssssp5l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/energy-diagram-demo/sssssp5l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/energy-diagram-demo/sssssp5l"/>
      <lastmod>2026-11-02T03:02:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/energy-diagram-demo/sssssp5l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/energy-diagram-demo/sssssp5l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/energy-diagram-demo/sssssp5l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/energy-diagram-demo/sssssp5l"/>
      <lastmod>2026-11-02T03:02:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/collatz-sequence-tracing/sssssp5y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/collatz-sequence-tracing/sssssp5y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/collatz-sequence-tracing/sssssp5y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/collatz-sequence-tracing/sssssp5y"/>
      <lastmod>2026-11-01T21:06:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/collatz-sequence-tracing/sssssp5y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/collatz-sequence-tracing/sssssp5y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/collatz-sequence-tracing/sssssp5y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/collatz-sequence-tracing/sssssp5y"/>
      <lastmod>2026-11-01T21:06:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/problem-395-14-comprehensive-construction-of-incircle-circumcircle-functions/sssssp5a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/problem-395-14-comprehensive-construction-of-incircle-circumcircle-functions/sssssp5a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/problem-395-14-comprehensive-construction-of-incircle-circumcircle-functions/sssssp5a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/problem-395-14-comprehensive-construction-of-incircle-circumcircle-functions/sssssp5a"/>
      <lastmod>2026-11-02T18:57:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/problem-395-14-comprehensive-construction-of-incircle-circumcircle-functions/sssssp5a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/problem-395-14-comprehensive-construction-of-incircle-circumcircle-functions/sssssp5a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/problem-395-14-comprehensive-construction-of-incircle-circumcircle-functions/sssssp5a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/problem-395-14-comprehensive-construction-of-incircle-circumcircle-functions/sssssp5a"/>
      <lastmod>2026-11-02T18:57:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/expand-brackets-and-distributive-property/sssssp5c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/expand-brackets-and-distributive-property/sssssp5c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/expand-brackets-and-distributive-property/sssssp5c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/expand-brackets-and-distributive-property/sssssp5c"/>
      <lastmod>2026-11-02T16:50:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/expand-brackets-and-distributive-property/sssssp5c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/expand-brackets-and-distributive-property/sssssp5c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/expand-brackets-and-distributive-property/sssssp5c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/expand-brackets-and-distributive-property/sssssp5c"/>
      <lastmod>2026-11-02T16:50:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pursuit-paths-via-complex-numbers/sssssp5r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pursuit-paths-via-complex-numbers/sssssp5r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pursuit-paths-via-complex-numbers/sssssp5r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pursuit-paths-via-complex-numbers/sssssp5r"/>
      <lastmod>2026-11-02T00:09:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pursuit-paths-via-complex-numbers/sssssp5r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pursuit-paths-via-complex-numbers/sssssp5r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pursuit-paths-via-complex-numbers/sssssp5r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pursuit-paths-via-complex-numbers/sssssp5r"/>
      <lastmod>2026-11-02T00:09:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/when-is-too-much-overlap-too-much/sssssp5h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/when-is-too-much-overlap-too-much/sssssp5h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/when-is-too-much-overlap-too-much/sssssp5h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/when-is-too-much-overlap-too-much/sssssp5h"/>
      <lastmod>2026-11-02T02:46:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/when-is-too-much-overlap-too-much/sssssp5h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/when-is-too-much-overlap-too-much/sssssp5h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/when-is-too-much-overlap-too-much/sssssp5h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/when-is-too-much-overlap-too-much/sssssp5h"/>
      <lastmod>2026-11-02T02:46:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-inequalities-demo-by-wong-fau-choo/sssssp5t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-demo-by-wong-fau-choo/sssssp5t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-inequalities-demo-by-wong-fau-choo/sssssp5t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-demo-by-wong-fau-choo/sssssp5t"/>
      <lastmod>2026-11-01T19:25:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-inequalities-demo-by-wong-fau-choo/sssssp5t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-demo-by-wong-fau-choo/sssssp5t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-inequalities-demo-by-wong-fau-choo/sssssp5t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-demo-by-wong-fau-choo/sssssp5t"/>
      <lastmod>2026-11-01T19:25:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vectors-in-geogebra-guide-rotation-length-and-angle/sssssp5x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-in-geogebra-guide-rotation-length-and-angle/sssssp5x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-in-geogebra-guide-rotation-length-and-angle/sssssp5x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-in-geogebra-guide-rotation-length-and-angle/sssssp5x"/>
      <lastmod>2026-11-02T00:47:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vectors-in-geogebra-guide-rotation-length-and-angle/sssssp5x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-in-geogebra-guide-rotation-length-and-angle/sssssp5x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-in-geogebra-guide-rotation-length-and-angle/sssssp5x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-in-geogebra-guide-rotation-length-and-angle/sssssp5x"/>
      <lastmod>2026-11-02T00:47:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-4-altitudes-and-orthocenter/sssssp5i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-4-altitudes-and-orthocenter/sssssp5i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-4-altitudes-and-orthocenter/sssssp5i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-4-altitudes-and-orthocenter/sssssp5i"/>
      <lastmod>2026-11-02T18:42:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-4-altitudes-and-orthocenter/sssssp5i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-4-altitudes-and-orthocenter/sssssp5i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-4-altitudes-and-orthocenter/sssssp5i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-4-altitudes-and-orthocenter/sssssp5i"/>
      <lastmod>2026-11-02T18:42:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-solid-of-revolution-2/sssssp5o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-solid-of-revolution-2/sssssp5o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-solid-of-revolution-2/sssssp5o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-solid-of-revolution-2/sssssp5o"/>
      <lastmod>2026-11-02T02:50:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-solid-of-revolution-2/sssssp5o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-solid-of-revolution-2/sssssp5o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-solid-of-revolution-2/sssssp5o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-solid-of-revolution-2/sssssp5o"/>
      <lastmod>2026-11-02T02:50:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/representations-of-linear-relationships-im-8-3-7-practice/ssssspbs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/representations-of-linear-relationships-im-8-3-7-practice/ssssspbs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/representations-of-linear-relationships-im-8-3-7-practice/ssssspbs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/representations-of-linear-relationships-im-8-3-7-practice/ssssspbs"/>
      <lastmod>2026-11-01T23:01:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/representations-of-linear-relationships-im-8-3-7-practice/ssssspbs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/representations-of-linear-relationships-im-8-3-7-practice/ssssspbs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/representations-of-linear-relationships-im-8-3-7-practice/ssssspbs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/representations-of-linear-relationships-im-8-3-7-practice/ssssspbs"/>
      <lastmod>2026-11-01T23:01:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/optimization-of-rectangle-under-parabola/ssssspb7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/optimization-of-rectangle-under-parabola/ssssspb7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/optimization-of-rectangle-under-parabola/ssssspb7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/optimization-of-rectangle-under-parabola/ssssspb7"/>
      <lastmod>2026-11-02T18:29:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/optimization-of-rectangle-under-parabola/ssssspb7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/optimization-of-rectangle-under-parabola/ssssspb7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/optimization-of-rectangle-under-parabola/ssssspb7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/optimization-of-rectangle-under-parabola/ssssspb7"/>
      <lastmod>2026-11-02T18:29:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cevians/ssssspbn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cevians/ssssspbn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cevians/ssssspbn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cevians/ssssspbn"/>
      <lastmod>2026-11-01T21:35:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cevians/ssssspbn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cevians/ssssspbn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cevians/ssssspbn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cevians/ssssspbn"/>
      <lastmod>2026-11-01T21:35:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drawing-and-demonstrating-axes-of-symmetry/ssssspb2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-and-demonstrating-axes-of-symmetry/ssssspb2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-and-demonstrating-axes-of-symmetry/ssssspb2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-and-demonstrating-axes-of-symmetry/ssssspb2"/>
      <lastmod>2026-11-02T00:06:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drawing-and-demonstrating-axes-of-symmetry/ssssspb2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-and-demonstrating-axes-of-symmetry/ssssspb2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-and-demonstrating-axes-of-symmetry/ssssspb2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-and-demonstrating-axes-of-symmetry/ssssspb2"/>
      <lastmod>2026-11-02T00:06:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractions-on-number-line-by-venkuchimal/ssssspbk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-on-number-line-by-venkuchimal/ssssspbk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-on-number-line-by-venkuchimal/ssssspbk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-on-number-line-by-venkuchimal/ssssspbk"/>
      <lastmod>2026-11-02T13:36:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractions-on-number-line-by-venkuchimal/ssssspbk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-on-number-line-by-venkuchimal/ssssspbk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-on-number-line-by-venkuchimal/ssssspbk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-on-number-line-by-venkuchimal/ssssspbk"/>
      <lastmod>2026-11-02T13:36:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-frikkie81/ssssspbz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-frikkie81/ssssspbz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-frikkie81/ssssspbz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-frikkie81/ssssspbz"/>
      <lastmod>2026-11-01T23:26:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-frikkie81/ssssspbz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-frikkie81/ssssspbz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-frikkie81/ssssspbz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-frikkie81/ssssspbz"/>
      <lastmod>2026-11-01T23:26:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-sin-demo/ssssspb0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-sin-demo/ssssspb0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-sin-demo/ssssspb0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-sin-demo/ssssspb0"/>
      <lastmod>2026-11-01T21:56:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-sin-demo/ssssspb0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-sin-demo/ssssspb0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-sin-demo/ssssspb0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-sin-demo/ssssspb0"/>
      <lastmod>2026-11-01T21:56:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangular-prism-by-spkwan/ssssspbd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-prism-by-spkwan/ssssspbd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-prism-by-spkwan/ssssspbd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-prism-by-spkwan/ssssspbd"/>
      <lastmod>2026-11-01T23:25:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangular-prism-by-spkwan/ssssspbd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-prism-by-spkwan/ssssspbd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-prism-by-spkwan/ssssspbd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-prism-by-spkwan/ssssspbd"/>
      <lastmod>2026-11-01T23:25:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/negative-binomial-geometric-distribution/ssssspbf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/negative-binomial-geometric-distribution/ssssspbf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/negative-binomial-geometric-distribution/ssssspbf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/negative-binomial-geometric-distribution/ssssspbf"/>
      <lastmod>2026-11-01T23:26:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/negative-binomial-geometric-distribution/ssssspbf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/negative-binomial-geometric-distribution/ssssspbf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/negative-binomial-geometric-distribution/ssssspbf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/negative-binomial-geometric-distribution/ssssspbf"/>
      <lastmod>2026-11-01T23:26:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spiral-maria-s-example/ssssspb8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-maria-s-example/ssssspb8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-maria-s-example/ssssspb8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-maria-s-example/ssssspb8"/>
      <lastmod>2026-11-01T21:59:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spiral-maria-s-example/ssssspb8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-maria-s-example/ssssspb8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-maria-s-example/ssssspb8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-maria-s-example/ssssspb8"/>
      <lastmod>2026-11-01T21:59:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/six-trig-graphs-from-unit-circle/ssssspbu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/six-trig-graphs-from-unit-circle/ssssspbu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/six-trig-graphs-from-unit-circle/ssssspbu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/six-trig-graphs-from-unit-circle/ssssspbu"/>
      <lastmod>2026-11-02T18:40:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/six-trig-graphs-from-unit-circle/ssssspbu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/six-trig-graphs-from-unit-circle/ssssspbu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/six-trig-graphs-from-unit-circle/ssssspbu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/six-trig-graphs-from-unit-circle/ssssspbu"/>
      <lastmod>2026-11-02T18:40:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-and-acute-triangles/ssssspb5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-and-acute-triangles/ssssspb5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-and-acute-triangles/ssssspb5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-and-acute-triangles/ssssspb5"/>
      <lastmod>2026-11-02T17:41:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-and-acute-triangles/ssssspb5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-and-acute-triangles/ssssspb5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-and-acute-triangles/ssssspb5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-and-acute-triangles/ssssspb5"/>
      <lastmod>2026-11-02T17:41:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/easy-menger-sponge/ssssspbb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/easy-menger-sponge/ssssspbb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/easy-menger-sponge/ssssspbb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/easy-menger-sponge/ssssspbb"/>
      <lastmod>2026-11-01T21:42:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/easy-menger-sponge/ssssspbb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/easy-menger-sponge/ssssspbb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/easy-menger-sponge/ssssspbb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/easy-menger-sponge/ssssspbb"/>
      <lastmod>2026-11-01T21:42:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drawing-canis-major-constellation-with-geogebra-segments/ssssspb3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-canis-major-constellation-with-geogebra-segments/ssssspb3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-canis-major-constellation-with-geogebra-segments/ssssspb3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-canis-major-constellation-with-geogebra-segments/ssssspb3"/>
      <lastmod>2026-11-02T00:06:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drawing-canis-major-constellation-with-geogebra-segments/ssssspb3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-canis-major-constellation-with-geogebra-segments/ssssspb3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-canis-major-constellation-with-geogebra-segments/ssssspb3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-canis-major-constellation-with-geogebra-segments/ssssspb3"/>
      <lastmod>2026-11-02T00:06:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-bisector-exploration-by-mr-lietzow/ssssspbq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-exploration-by-mr-lietzow/ssssspbq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisector-exploration-by-mr-lietzow/ssssspbq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-exploration-by-mr-lietzow/ssssspbq"/>
      <lastmod>2026-11-01T22:00:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-bisector-exploration-by-mr-lietzow/ssssspbq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-exploration-by-mr-lietzow/ssssspbq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisector-exploration-by-mr-lietzow/ssssspbq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-exploration-by-mr-lietzow/ssssspbq"/>
      <lastmod>2026-11-01T22:00:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tower-of-hanoi/ssssspb1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tower-of-hanoi/ssssspb1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tower-of-hanoi/ssssspb1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tower-of-hanoi/ssssspb1"/>
      <lastmod>2026-11-01T21:32:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tower-of-hanoi/ssssspb1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tower-of-hanoi/ssssspb1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tower-of-hanoi/ssssspb1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tower-of-hanoi/ssssspb1"/>
      <lastmod>2026-11-01T21:32:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-intersections/ssssspbm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-intersections/ssssspbm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-intersections/ssssspbm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-intersections/ssssspbm"/>
      <lastmod>2026-11-02T12:31:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-intersections/ssssspbm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-intersections/ssssspbm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-intersections/ssssspbm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-intersections/ssssspbm"/>
      <lastmod>2026-11-02T12:31:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/point-outside-a-line/ssssspbj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-outside-a-line/ssssspbj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-outside-a-line/ssssspbj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-outside-a-line/ssssspbj"/>
      <lastmod>2026-11-02T12:40:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/point-outside-a-line/ssssspbj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-outside-a-line/ssssspbj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-outside-a-line/ssssspbj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-outside-a-line/ssssspbj"/>
      <lastmod>2026-11-02T12:40:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/garden-problem/ssssspbp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/garden-problem/ssssspbp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/garden-problem/ssssspbp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/garden-problem/ssssspbp"/>
      <lastmod>2026-11-02T10:42:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/garden-problem/ssssspbp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/garden-problem/ssssspbp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/garden-problem/ssssspbp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/garden-problem/ssssspbp"/>
      <lastmod>2026-11-02T10:42:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-a-derivative/ssssspbw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-derivative/ssssspbw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-derivative/ssssspbw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-derivative/ssssspbw"/>
      <lastmod>2026-11-01T21:32:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-a-derivative/ssssspbw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-derivative/ssssspbw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-derivative/ssssspbw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-derivative/ssssspbw"/>
      <lastmod>2026-11-01T21:32:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-points-example/ssssspb6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-points-example/ssssspb6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-points-example/ssssspb6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-points-example/ssssspb6"/>
      <lastmod>2026-11-02T17:36:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-points-example/ssssspb6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-points-example/ssssspb6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-points-example/ssssspb6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-points-example/ssssspb6"/>
      <lastmod>2026-11-02T17:36:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/aas-exploration-in-hyperbolic-geometry/ssssspbg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/aas-exploration-in-hyperbolic-geometry/ssssspbg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/aas-exploration-in-hyperbolic-geometry/ssssspbg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/aas-exploration-in-hyperbolic-geometry/ssssspbg"/>
      <lastmod>2026-11-01T20:54:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/aas-exploration-in-hyperbolic-geometry/ssssspbg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/aas-exploration-in-hyperbolic-geometry/ssssspbg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/aas-exploration-in-hyperbolic-geometry/ssssspbg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/aas-exploration-in-hyperbolic-geometry/ssssspbg"/>
      <lastmod>2026-11-01T20:54:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angles-on-a-line-by-james-monaghan/ssssspb9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-on-a-line-by-james-monaghan/ssssspb9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-on-a-line-by-james-monaghan/ssssspb9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-on-a-line-by-james-monaghan/ssssspb9"/>
      <lastmod>2026-11-02T10:44:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angles-on-a-line-by-james-monaghan/ssssspb9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-on-a-line-by-james-monaghan/ssssspb9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-on-a-line-by-james-monaghan/ssssspb9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-on-a-line-by-james-monaghan/ssssspb9"/>
      <lastmod>2026-11-02T10:44:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parametric-curves-1-1/ssssspbe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-curves-1-1/ssssspbe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-curves-1-1/ssssspbe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-curves-1-1/ssssspbe"/>
      <lastmod>2026-11-02T15:07:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parametric-curves-1-1/ssssspbe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-curves-1-1/ssssspbe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-curves-1-1/ssssspbe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-curves-1-1/ssssspbe"/>
      <lastmod>2026-11-02T15:07:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inequalities-in-a-triangle-by-stacey-barkell/ssssspbv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inequalities-in-a-triangle-by-stacey-barkell/ssssspbv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inequalities-in-a-triangle-by-stacey-barkell/ssssspbv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inequalities-in-a-triangle-by-stacey-barkell/ssssspbv"/>
      <lastmod>2026-11-02T17:47:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inequalities-in-a-triangle-by-stacey-barkell/ssssspbv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inequalities-in-a-triangle-by-stacey-barkell/ssssspbv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inequalities-in-a-triangle-by-stacey-barkell/ssssspbv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inequalities-in-a-triangle-by-stacey-barkell/ssssspbv"/>
      <lastmod>2026-11-02T17:47:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/closest-point-2a-shortest-distance-in-3d-with-vectors-and-linear-functions/ssssspb4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/closest-point-2a-shortest-distance-in-3d-with-vectors-and-linear-functions/ssssspb4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/closest-point-2a-shortest-distance-in-3d-with-vectors-and-linear-functions/ssssspb4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/closest-point-2a-shortest-distance-in-3d-with-vectors-and-linear-functions/ssssspb4"/>
      <lastmod>2026-11-01T21:14:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/closest-point-2a-shortest-distance-in-3d-with-vectors-and-linear-functions/ssssspb4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/closest-point-2a-shortest-distance-in-3d-with-vectors-and-linear-functions/ssssspb4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/closest-point-2a-shortest-distance-in-3d-with-vectors-and-linear-functions/ssssspb4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/closest-point-2a-shortest-distance-in-3d-with-vectors-and-linear-functions/ssssspb4"/>
      <lastmod>2026-11-01T21:14:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/decimal-division-demonstration/ssssspbl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-division-demonstration/ssssspbl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-division-demonstration/ssssspbl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-division-demonstration/ssssspbl"/>
      <lastmod>2026-11-02T11:48:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/decimal-division-demonstration/ssssspbl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-division-demonstration/ssssspbl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-division-demonstration/ssssspbl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-division-demonstration/ssssspbl"/>
      <lastmod>2026-11-02T11:48:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-geometric-construction-from-segments-to-composite-transformations/ssssspby</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-geometric-construction-from-segments-to-composite-transformations/ssssspby"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-geometric-construction-from-segments-to-composite-transformations/ssssspby"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-geometric-construction-from-segments-to-composite-transformations/ssssspby"/>
      <lastmod>2026-11-01T20:58:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-geometric-construction-from-segments-to-composite-transformations/ssssspby</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-geometric-construction-from-segments-to-composite-transformations/ssssspby"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-geometric-construction-from-segments-to-composite-transformations/ssssspby"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-geometric-construction-from-segments-to-composite-transformations/ssssspby"/>
      <lastmod>2026-11-01T20:58:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-and-volume-elements-in-spherical-coordinates/ssssspba</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-and-volume-elements-in-spherical-coordinates/ssssspba"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-and-volume-elements-in-spherical-coordinates/ssssspba"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-and-volume-elements-in-spherical-coordinates/ssssspba"/>
      <lastmod>2026-11-01T21:33:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-and-volume-elements-in-spherical-coordinates/ssssspba</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-and-volume-elements-in-spherical-coordinates/ssssspba"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-and-volume-elements-in-spherical-coordinates/ssssspba"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-and-volume-elements-in-spherical-coordinates/ssssspba"/>
      <lastmod>2026-11-01T21:33:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animation-demonstrating-circumcircle-and-similarity-transformation/ssssspbc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-demonstrating-circumcircle-and-similarity-transformation/ssssspbc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-demonstrating-circumcircle-and-similarity-transformation/ssssspbc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-demonstrating-circumcircle-and-similarity-transformation/ssssspbc"/>
      <lastmod>2026-11-02T11:58:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animation-demonstrating-circumcircle-and-similarity-transformation/ssssspbc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-demonstrating-circumcircle-and-similarity-transformation/ssssspbc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-demonstrating-circumcircle-and-similarity-transformation/ssssspbc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-demonstrating-circumcircle-and-similarity-transformation/ssssspbc"/>
      <lastmod>2026-11-02T11:58:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-side-calculation/ssssspbr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-side-calculation/ssssspbr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-side-calculation/ssssspbr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-side-calculation/ssssspbr"/>
      <lastmod>2026-11-01T21:21:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-side-calculation/ssssspbr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-side-calculation/ssssspbr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-side-calculation/ssssspbr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-side-calculation/ssssspbr"/>
      <lastmod>2026-11-01T21:21:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-demo-of-right-triangle-s-incircle-and-excircle/ssssspbh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demo-of-right-triangle-s-incircle-and-excircle/ssssspbh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demo-of-right-triangle-s-incircle-and-excircle/ssssspbh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demo-of-right-triangle-s-incircle-and-excircle/ssssspbh"/>
      <lastmod>2026-11-01T23:17:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-demo-of-right-triangle-s-incircle-and-excircle/ssssspbh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demo-of-right-triangle-s-incircle-and-excircle/ssssspbh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demo-of-right-triangle-s-incircle-and-excircle/ssssspbh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demo-of-right-triangle-s-incircle-and-excircle/ssssspbh"/>
      <lastmod>2026-11-01T23:17:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arithmetic-sequence-formula/ssssspbt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-formula/ssssspbt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-sequence-formula/ssssspbt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-formula/ssssspbt"/>
      <lastmod>2026-11-02T18:05:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arithmetic-sequence-formula/ssssspbt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-formula/ssssspbt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-sequence-formula/ssssspbt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-formula/ssssspbt"/>
      <lastmod>2026-11-02T18:05:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-of-obtuse-triangle-in-a-square/ssssspbx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-of-obtuse-triangle-in-a-square/ssssspbx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-of-obtuse-triangle-in-a-square/ssssspbx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-of-obtuse-triangle-in-a-square/ssssspbx"/>
      <lastmod>2026-11-02T18:13:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-of-obtuse-triangle-in-a-square/ssssspbx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-of-obtuse-triangle-in-a-square/ssssspbx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-of-obtuse-triangle-in-a-square/ssssspbx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-of-obtuse-triangle-in-a-square/ssssspbx"/>
      <lastmod>2026-11-02T18:13:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-division-demonstration-by-jennifer-silverman/ssssspbi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-division-demonstration-by-jennifer-silverman/ssssspbi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-division-demonstration-by-jennifer-silverman/ssssspbi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-division-demonstration-by-jennifer-silverman/ssssspbi"/>
      <lastmod>2026-11-02T15:08:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-division-demonstration-by-jennifer-silverman/ssssspbi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-division-demonstration-by-jennifer-silverman/ssssspbi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-division-demonstration-by-jennifer-silverman/ssssspbi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-division-demonstration-by-jennifer-silverman/ssssspbi"/>
      <lastmod>2026-11-02T15:08:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-example-lines-vectors-and-polygon-construction/ssssspbo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-example-lines-vectors-and-polygon-construction/ssssspbo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-example-lines-vectors-and-polygon-construction/ssssspbo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-example-lines-vectors-and-polygon-construction/ssssspbo"/>
      <lastmod>2026-11-02T15:07:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-example-lines-vectors-and-polygon-construction/ssssspbo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-example-lines-vectors-and-polygon-construction/ssssspbo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-example-lines-vectors-and-polygon-construction/ssssspbo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-example-lines-vectors-and-polygon-construction/ssssspbo"/>
      <lastmod>2026-11-02T15:07:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-maximum-points-using-function-translations/sssssp3s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-maximum-points-using-function-translations/sssssp3s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-maximum-points-using-function-translations/sssssp3s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-maximum-points-using-function-translations/sssssp3s"/>
      <lastmod>2026-11-02T00:03:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-maximum-points-using-function-translations/sssssp3s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-maximum-points-using-function-translations/sssssp3s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-maximum-points-using-function-translations/sssssp3s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-maximum-points-using-function-translations/sssssp3s"/>
      <lastmod>2026-11-02T00:03:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-lesson-example/sssssp37</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-lesson-example/sssssp37"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-lesson-example/sssssp37"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-lesson-example/sssssp37"/>
      <lastmod>2026-11-02T12:33:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-lesson-example/sssssp37</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-lesson-example/sssssp37"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-lesson-example/sssssp37"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-lesson-example/sssssp37"/>
      <lastmod>2026-11-02T12:33:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphically-calculate-derivative/sssssp3n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphically-calculate-derivative/sssssp3n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphically-calculate-derivative/sssssp3n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphically-calculate-derivative/sssssp3n"/>
      <lastmod>2026-11-02T18:55:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphically-calculate-derivative/sssssp3n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphically-calculate-derivative/sssssp3n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphically-calculate-derivative/sssssp3n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphically-calculate-derivative/sssssp3n"/>
      <lastmod>2026-11-02T18:55:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilation-transformation-demo-by-christina-bulen/sssssp32</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-transformation-demo-by-christina-bulen/sssssp32"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-transformation-demo-by-christina-bulen/sssssp32"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-transformation-demo-by-christina-bulen/sssssp32"/>
      <lastmod>2026-11-02T12:05:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilation-transformation-demo-by-christina-bulen/sssssp32</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-transformation-demo-by-christina-bulen/sssssp32"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-transformation-demo-by-christina-bulen/sssssp32"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-transformation-demo-by-christina-bulen/sssssp32"/>
      <lastmod>2026-11-02T12:05:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/day-6-dilation/sssssp3k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/day-6-dilation/sssssp3k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/day-6-dilation/sssssp3k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/day-6-dilation/sssssp3k"/>
      <lastmod>2026-11-02T17:14:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/day-6-dilation/sssssp3k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/day-6-dilation/sssssp3k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/day-6-dilation/sssssp3k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/day-6-dilation/sssssp3k"/>
      <lastmod>2026-11-02T17:14:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/four-parallelogram-properties-interactive-demo/sssssp3z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/four-parallelogram-properties-interactive-demo/sssssp3z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/four-parallelogram-properties-interactive-demo/sssssp3z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/four-parallelogram-properties-interactive-demo/sssssp3z"/>
      <lastmod>2026-11-02T12:17:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/four-parallelogram-properties-interactive-demo/sssssp3z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/four-parallelogram-properties-interactive-demo/sssssp3z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/four-parallelogram-properties-interactive-demo/sssssp3z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/four-parallelogram-properties-interactive-demo/sssssp3z"/>
      <lastmod>2026-11-02T12:17:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/space-exploration/sssssp30</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/space-exploration/sssssp30"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/space-exploration/sssssp30"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/space-exploration/sssssp30"/>
      <lastmod>2026-11-02T12:10:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/space-exploration/sssssp30</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/space-exploration/sssssp30"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/space-exploration/sssssp30"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/space-exploration/sssssp30"/>
      <lastmod>2026-11-02T12:10:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-construction-and-net/sssssp3d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-construction-and-net/sssssp3d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-construction-and-net/sssssp3d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-construction-and-net/sssssp3d"/>
      <lastmod>2026-11-01T21:09:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-construction-and-net/sssssp3d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-construction-and-net/sssssp3d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-construction-and-net/sssssp3d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-construction-and-net/sssssp3d"/>
      <lastmod>2026-11-01T21:09:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-parameterization-and-foci-demonstration/sssssp3f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-parameterization-and-foci-demonstration/sssssp3f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-parameterization-and-foci-demonstration/sssssp3f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-parameterization-and-foci-demonstration/sssssp3f"/>
      <lastmod>2026-11-01T20:43:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-parameterization-and-foci-demonstration/sssssp3f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-parameterization-and-foci-demonstration/sssssp3f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-parameterization-and-foci-demonstration/sssssp3f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-parameterization-and-foci-demonstration/sssssp3f"/>
      <lastmod>2026-11-01T20:43:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-properties-investigation-by-wayne/sssssp38</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-properties-investigation-by-wayne/sssssp38"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-properties-investigation-by-wayne/sssssp38"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-properties-investigation-by-wayne/sssssp38"/>
      <lastmod>2026-11-02T09:14:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-properties-investigation-by-wayne/sssssp38</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-properties-investigation-by-wayne/sssssp38"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-properties-investigation-by-wayne/sssssp38"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-properties-investigation-by-wayne/sssssp38"/>
      <lastmod>2026-11-02T09:14:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-z-and-t-distributions-effect-of-degrees-of-freedom-on-critical-values/sssssp3u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-z-and-t-distributions-effect-of-degrees-of-freedom-on-critical-values/sssssp3u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-z-and-t-distributions-effect-of-degrees-of-freedom-on-critical-values/sssssp3u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-z-and-t-distributions-effect-of-degrees-of-freedom-on-critical-values/sssssp3u"/>
      <lastmod>2026-11-02T17:53:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-z-and-t-distributions-effect-of-degrees-of-freedom-on-critical-values/sssssp3u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-z-and-t-distributions-effect-of-degrees-of-freedom-on-critical-values/sssssp3u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-z-and-t-distributions-effect-of-degrees-of-freedom-on-critical-values/sssssp3u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-z-and-t-distributions-effect-of-degrees-of-freedom-on-critical-values/sssssp3u"/>
      <lastmod>2026-11-02T17:53:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometry-planes/sssssp35</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometry-planes/sssssp35"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometry-planes/sssssp35"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometry-planes/sssssp35"/>
      <lastmod>2026-11-02T15:02:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometry-planes/sssssp35</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometry-planes/sssssp35"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometry-planes/sssssp35"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometry-planes/sssssp35"/>
      <lastmod>2026-11-02T15:02:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-exploration-of-pythagoras-theorem-and-vectors/sssssp3b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-pythagoras-theorem-and-vectors/sssssp3b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-exploration-of-pythagoras-theorem-and-vectors/sssssp3b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-pythagoras-theorem-and-vectors/sssssp3b"/>
      <lastmod>2026-11-02T17:12:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-exploration-of-pythagoras-theorem-and-vectors/sssssp3b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-pythagoras-theorem-and-vectors/sssssp3b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-exploration-of-pythagoras-theorem-and-vectors/sssssp3b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-pythagoras-theorem-and-vectors/sssssp3b"/>
      <lastmod>2026-11-02T17:12:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-geometry-construction-demo/sssssp33</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-geometry-construction-demo/sssssp33"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-geometry-construction-demo/sssssp33"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-geometry-construction-demo/sssssp33"/>
      <lastmod>2026-11-01T20:45:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-geometry-construction-demo/sssssp33</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-geometry-construction-demo/sssssp33"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-geometry-construction-demo/sssssp33"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-geometry-construction-demo/sssssp33"/>
      <lastmod>2026-11-01T20:45:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangular-pyramid-net-and-surface-area/sssssp3q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-pyramid-net-and-surface-area/sssssp3q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-pyramid-net-and-surface-area/sssssp3q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-pyramid-net-and-surface-area/sssssp3q"/>
      <lastmod>2026-11-01T23:50:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangular-pyramid-net-and-surface-area/sssssp3q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-pyramid-net-and-surface-area/sssssp3q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-pyramid-net-and-surface-area/sssssp3q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-pyramid-net-and-surface-area/sssssp3q"/>
      <lastmod>2026-11-01T23:50:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/scalar-product-of-vectors/sssssp31</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scalar-product-of-vectors/sssssp31"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scalar-product-of-vectors/sssssp31"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scalar-product-of-vectors/sssssp31"/>
      <lastmod>2026-11-02T17:45:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/scalar-product-of-vectors/sssssp31</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scalar-product-of-vectors/sssssp31"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scalar-product-of-vectors/sssssp31"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scalar-product-of-vectors/sssssp31"/>
      <lastmod>2026-11-02T17:45:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-rule-demonstration/sssssp3m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-rule-demonstration/sssssp3m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-rule-demonstration/sssssp3m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-rule-demonstration/sssssp3m"/>
      <lastmod>2026-11-01T21:10:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-rule-demonstration/sssssp3m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-rule-demonstration/sssssp3m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-rule-demonstration/sssssp3m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-rule-demonstration/sssssp3m"/>
      <lastmod>2026-11-01T21:10:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-animation-demo/sssssp3j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-animation-demo/sssssp3j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-animation-demo/sssssp3j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-animation-demo/sssssp3j"/>
      <lastmod>2026-11-02T17:44:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-animation-demo/sssssp3j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-animation-demo/sssssp3j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-animation-demo/sssssp3j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-animation-demo/sssssp3j"/>
      <lastmod>2026-11-02T17:44:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/positive-exponent-practice/sssssp3p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/positive-exponent-practice/sssssp3p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/positive-exponent-practice/sssssp3p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/positive-exponent-practice/sssssp3p"/>
      <lastmod>2026-11-02T13:13:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/positive-exponent-practice/sssssp3p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/positive-exponent-practice/sssssp3p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/positive-exponent-practice/sssssp3p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/positive-exponent-practice/sssssp3p"/>
      <lastmod>2026-11-02T13:13:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/law-of-large-numbers-ratio-of-heads/sssssp3w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-large-numbers-ratio-of-heads/sssssp3w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-large-numbers-ratio-of-heads/sssssp3w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-large-numbers-ratio-of-heads/sssssp3w"/>
      <lastmod>2026-11-01T21:50:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/law-of-large-numbers-ratio-of-heads/sssssp3w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-large-numbers-ratio-of-heads/sssssp3w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-large-numbers-ratio-of-heads/sssssp3w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-large-numbers-ratio-of-heads/sssssp3w"/>
      <lastmod>2026-11-01T21:50:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perimeter-of-congruent-figures/sssssp36</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-of-congruent-figures/sssssp36"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-of-congruent-figures/sssssp36"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-of-congruent-figures/sssssp36"/>
      <lastmod>2026-11-02T18:38:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perimeter-of-congruent-figures/sssssp36</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-of-congruent-figures/sssssp36"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-of-congruent-figures/sssssp36"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-of-congruent-figures/sssssp36"/>
      <lastmod>2026-11-02T18:38:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-ratios-on-the-unit-circle/sssssp3g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-on-the-unit-circle/sssssp3g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-on-the-unit-circle/sssssp3g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-on-the-unit-circle/sssssp3g"/>
      <lastmod>2026-11-02T18:35:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-ratios-on-the-unit-circle/sssssp3g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-on-the-unit-circle/sssssp3g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-on-the-unit-circle/sssssp3g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-on-the-unit-circle/sssssp3g"/>
      <lastmod>2026-11-02T18:35:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/line-segment-slope/sssssp39</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-segment-slope/sssssp39"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-segment-slope/sssssp39"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-segment-slope/sssssp39"/>
      <lastmod>2026-11-02T00:51:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/line-segment-slope/sssssp39</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-segment-slope/sssssp39"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-segment-slope/sssssp39"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-segment-slope/sssssp39"/>
      <lastmod>2026-11-02T00:51:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sections-of-triangular-pyramids-by-dan-dale/sssssp3e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-triangular-pyramids-by-dan-dale/sssssp3e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-triangular-pyramids-by-dan-dale/sssssp3e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-triangular-pyramids-by-dan-dale/sssssp3e"/>
      <lastmod>2026-11-01T21:38:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sections-of-triangular-pyramids-by-dan-dale/sssssp3e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-triangular-pyramids-by-dan-dale/sssssp3e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-triangular-pyramids-by-dan-dale/sssssp3e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-triangular-pyramids-by-dan-dale/sssssp3e"/>
      <lastmod>2026-11-01T21:38:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-point-symmetry/sssssp3v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-point-symmetry/sssssp3v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-point-symmetry/sssssp3v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-point-symmetry/sssssp3v"/>
      <lastmod>2026-11-02T00:12:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-point-symmetry/sssssp3v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-point-symmetry/sssssp3v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-point-symmetry/sssssp3v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-point-symmetry/sssssp3v"/>
      <lastmod>2026-11-02T00:12:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-application-to-demand/sssssp34</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-application-to-demand/sssssp34"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-application-to-demand/sssssp34"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-application-to-demand/sssssp34"/>
      <lastmod>2026-11-02T18:07:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-application-to-demand/sssssp34</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-application-to-demand/sssssp34"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-application-to-demand/sssssp34"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-application-to-demand/sssssp34"/>
      <lastmod>2026-11-02T18:07:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-function-graph-features/sssssp3l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-function-graph-features/sssssp3l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-function-graph-features/sssssp3l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-function-graph-features/sssssp3l"/>
      <lastmod>2026-11-02T18:00:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-function-graph-features/sssssp3l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-function-graph-features/sssssp3l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-function-graph-features/sssssp3l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-function-graph-features/sssssp3l"/>
      <lastmod>2026-11-02T18:00:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-and-geometric-transformations-demo/sssssp3y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-and-geometric-transformations-demo/sssssp3y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-and-geometric-transformations-demo/sssssp3y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-and-geometric-transformations-demo/sssssp3y"/>
      <lastmod>2026-11-02T18:08:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-and-geometric-transformations-demo/sssssp3y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-and-geometric-transformations-demo/sssssp3y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-and-geometric-transformations-demo/sssssp3y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-and-geometric-transformations-demo/sssssp3y"/>
      <lastmod>2026-11-02T18:08:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sir-epidemic-model-dynamic-simulation-by-juan-carlos-ponce-campuzano/sssssp3a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sir-epidemic-model-dynamic-simulation-by-juan-carlos-ponce-campuzano/sssssp3a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sir-epidemic-model-dynamic-simulation-by-juan-carlos-ponce-campuzano/sssssp3a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sir-epidemic-model-dynamic-simulation-by-juan-carlos-ponce-campuzano/sssssp3a"/>
      <lastmod>2026-11-01T21:29:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sir-epidemic-model-dynamic-simulation-by-juan-carlos-ponce-campuzano/sssssp3a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sir-epidemic-model-dynamic-simulation-by-juan-carlos-ponce-campuzano/sssssp3a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sir-epidemic-model-dynamic-simulation-by-juan-carlos-ponce-campuzano/sssssp3a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sir-epidemic-model-dynamic-simulation-by-juan-carlos-ponce-campuzano/sssssp3a"/>
      <lastmod>2026-11-01T21:29:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/line-parabola-intersection/sssssp3c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-parabola-intersection/sssssp3c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-parabola-intersection/sssssp3c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-parabola-intersection/sssssp3c"/>
      <lastmod>2026-11-02T07:14:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/line-parabola-intersection/sssssp3c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-parabola-intersection/sssssp3c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-parabola-intersection/sssssp3c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-parabola-intersection/sssssp3c"/>
      <lastmod>2026-11-02T07:14:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-reflective-property-demonstration/sssssp3r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-reflective-property-demonstration/sssssp3r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-reflective-property-demonstration/sssssp3r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-reflective-property-demonstration/sssssp3r"/>
      <lastmod>2026-11-02T16:49:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-reflective-property-demonstration/sssssp3r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-reflective-property-demonstration/sssssp3r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-reflective-property-demonstration/sssssp3r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-reflective-property-demonstration/sssssp3r"/>
      <lastmod>2026-11-02T16:49:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solar-system-planet-orbits/sssssp3h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solar-system-planet-orbits/sssssp3h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solar-system-planet-orbits/sssssp3h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solar-system-planet-orbits/sssssp3h"/>
      <lastmod>2026-11-02T12:50:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solar-system-planet-orbits/sssssp3h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solar-system-planet-orbits/sssssp3h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solar-system-planet-orbits/sssssp3h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solar-system-planet-orbits/sssssp3h"/>
      <lastmod>2026-11-02T12:50:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-similar-triangles-demo/sssssp3t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-similar-triangles-demo/sssssp3t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-similar-triangles-demo/sssssp3t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-similar-triangles-demo/sssssp3t"/>
      <lastmod>2026-11-02T12:26:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-similar-triangles-demo/sssssp3t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-similar-triangles-demo/sssssp3t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-similar-triangles-demo/sssssp3t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-similar-triangles-demo/sssssp3t"/>
      <lastmod>2026-11-02T12:26:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-equations/sssssp3x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations/sssssp3x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations/sssssp3x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations/sssssp3x"/>
      <lastmod>2026-11-02T00:42:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-equations/sssssp3x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations/sssssp3x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations/sssssp3x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations/sssssp3x"/>
      <lastmod>2026-11-02T00:42:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthoptic-of-the-fermat-4-curve/sssssp3i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthoptic-of-the-fermat-4-curve/sssssp3i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthoptic-of-the-fermat-4-curve/sssssp3i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthoptic-of-the-fermat-4-curve/sssssp3i"/>
      <lastmod>2026-11-01T23:16:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthoptic-of-the-fermat-4-curve/sssssp3i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthoptic-of-the-fermat-4-curve/sssssp3i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthoptic-of-the-fermat-4-curve/sssssp3i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthoptic-of-the-fermat-4-curve/sssssp3i"/>
      <lastmod>2026-11-01T23:16:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-rectangular-prism/sssssp3o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-rectangular-prism/sssssp3o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-rectangular-prism/sssssp3o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-rectangular-prism/sssssp3o"/>
      <lastmod>2026-11-01T20:52:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-rectangular-prism/sssssp3o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-rectangular-prism/sssssp3o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-rectangular-prism/sssssp3o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-rectangular-prism/sssssp3o"/>
      <lastmod>2026-11-01T20:52:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/epicyclic-gear/ssssspqs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/epicyclic-gear/ssssspqs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/epicyclic-gear/ssssspqs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/epicyclic-gear/ssssspqs"/>
      <lastmod>2026-11-02T18:24:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/epicyclic-gear/ssssspqs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/epicyclic-gear/ssssspqs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/epicyclic-gear/ssssspqs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/epicyclic-gear/ssssspqs"/>
      <lastmod>2026-11-02T18:24:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangular-prism-construction-and-volume-integration/ssssspq7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-prism-construction-and-volume-integration/ssssspq7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-prism-construction-and-volume-integration/ssssspq7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-prism-construction-and-volume-integration/ssssspq7"/>
      <lastmod>2026-11-02T06:26:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangular-prism-construction-and-volume-integration/ssssspq7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-prism-construction-and-volume-integration/ssssspq7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-prism-construction-and-volume-integration/ssssspq7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-prism-construction-and-volume-integration/ssssspq7"/>
      <lastmod>2026-11-02T06:26:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-in-cartesian-coordinate-system/ssssspqn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-in-cartesian-coordinate-system/ssssspqn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-in-cartesian-coordinate-system/ssssspqn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-in-cartesian-coordinate-system/ssssspqn"/>
      <lastmod>2026-11-02T02:21:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-in-cartesian-coordinate-system/ssssspqn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-in-cartesian-coordinate-system/ssssspqn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-in-cartesian-coordinate-system/ssssspqn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-in-cartesian-coordinate-system/ssssspqn"/>
      <lastmod>2026-11-02T02:21:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-calculator-by-robin-nagy/ssssspq2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-calculator-by-robin-nagy/ssssspq2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-calculator-by-robin-nagy/ssssspq2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-calculator-by-robin-nagy/ssssspq2"/>
      <lastmod>2026-11-02T17:36:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-calculator-by-robin-nagy/ssssspq2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-calculator-by-robin-nagy/ssssspq2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-calculator-by-robin-nagy/ssssspq2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-calculator-by-robin-nagy/ssssspq2"/>
      <lastmod>2026-11-02T17:36:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-rates-in-tables-graphs-and-equations/ssssspqk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-rates-in-tables-graphs-and-equations/ssssspqk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-rates-in-tables-graphs-and-equations/ssssspqk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-rates-in-tables-graphs-and-equations/ssssspqk"/>
      <lastmod>2026-11-01T21:16:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-rates-in-tables-graphs-and-equations/ssssspqk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-rates-in-tables-graphs-and-equations/ssssspqk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-rates-in-tables-graphs-and-equations/ssssspqk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-rates-in-tables-graphs-and-equations/ssssspqk"/>
      <lastmod>2026-11-01T21:16:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-properties-discovery/ssssspqz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-properties-discovery/ssssspqz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-properties-discovery/ssssspqz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-properties-discovery/ssssspqz"/>
      <lastmod>2026-11-02T16:48:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-properties-discovery/ssssspqz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-properties-discovery/ssssspqz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-properties-discovery/ssssspqz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-properties-discovery/ssssspqz"/>
      <lastmod>2026-11-02T16:48:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-systems-of-linear-equations-algebraically/ssssspq0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-systems-of-linear-equations-algebraically/ssssspq0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-systems-of-linear-equations-algebraically/ssssspq0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-systems-of-linear-equations-algebraically/ssssspq0"/>
      <lastmod>2026-11-01T21:18:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-systems-of-linear-equations-algebraically/ssssspq0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-systems-of-linear-equations-algebraically/ssssspq0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-systems-of-linear-equations-algebraically/ssssspq0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-systems-of-linear-equations-algebraically/ssssspq0"/>
      <lastmod>2026-11-01T21:18:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstrating-x-y-z-using-complex-numbers/ssssspqd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-x-y-z-using-complex-numbers/ssssspqd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-x-y-z-using-complex-numbers/ssssspqd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-x-y-z-using-complex-numbers/ssssspqd"/>
      <lastmod>2026-11-02T17:10:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstrating-x-y-z-using-complex-numbers/ssssspqd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-x-y-z-using-complex-numbers/ssssspqd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-x-y-z-using-complex-numbers/ssssspqd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-x-y-z-using-complex-numbers/ssssspqd"/>
      <lastmod>2026-11-02T17:10:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polyspiral/ssssspqf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polyspiral/ssssspqf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polyspiral/ssssspqf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polyspiral/ssssspqf"/>
      <lastmod>2026-11-02T16:49:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polyspiral/ssssspqf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polyspiral/ssssspqf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polyspiral/ssssspqf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polyspiral/ssssspqf"/>
      <lastmod>2026-11-02T16:49:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logarithmic-functions-anatomy-by-megan-ann-martinez/ssssspq8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-functions-anatomy-by-megan-ann-martinez/ssssspq8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-functions-anatomy-by-megan-ann-martinez/ssssspq8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-functions-anatomy-by-megan-ann-martinez/ssssspq8"/>
      <lastmod>2026-11-02T17:00:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logarithmic-functions-anatomy-by-megan-ann-martinez/ssssspq8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-functions-anatomy-by-megan-ann-martinez/ssssspq8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-functions-anatomy-by-megan-ann-martinez/ssssspq8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-functions-anatomy-by-megan-ann-martinez/ssssspq8"/>
      <lastmod>2026-11-02T17:00:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilation-game/ssssspqu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-game/ssssspqu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-game/ssssspqu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-game/ssssspqu"/>
      <lastmod>2026-11-01T21:23:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilation-game/ssssspqu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-game/ssssspqu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-game/ssssspqu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-game/ssssspqu"/>
      <lastmod>2026-11-01T21:23:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-the-unit-circle/ssssspq5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-unit-circle/ssssspq5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-unit-circle/ssssspq5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-unit-circle/ssssspq5"/>
      <lastmod>2026-11-02T13:36:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-the-unit-circle/ssssspq5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-unit-circle/ssssspq5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-unit-circle/ssssspq5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-unit-circle/ssssspq5"/>
      <lastmod>2026-11-02T13:36:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/car-payment-calculator/ssssspqb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/car-payment-calculator/ssssspqb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/car-payment-calculator/ssssspqb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/car-payment-calculator/ssssspqb"/>
      <lastmod>2026-11-01T22:02:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/car-payment-calculator/ssssspqb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/car-payment-calculator/ssssspqb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/car-payment-calculator/ssssspqb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/car-payment-calculator/ssssspqb"/>
      <lastmod>2026-11-01T22:02:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-a-line-and-a-circle-by-carol/ssssspq3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-a-line-and-a-circle-by-carol/ssssspq3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-a-line-and-a-circle-by-carol/ssssspq3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-a-line-and-a-circle-by-carol/ssssspq3"/>
      <lastmod>2026-11-02T12:43:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-a-line-and-a-circle-by-carol/ssssspq3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-a-line-and-a-circle-by-carol/ssssspq3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-a-line-and-a-circle-by-carol/ssssspq3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-a-line-and-a-circle-by-carol/ssssspq3"/>
      <lastmod>2026-11-02T12:43:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponent-laws-practice-by-lee-w-fisher/ssssspqq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-laws-practice-by-lee-w-fisher/ssssspqq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-laws-practice-by-lee-w-fisher/ssssspqq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-laws-practice-by-lee-w-fisher/ssssspqq"/>
      <lastmod>2026-11-01T21:25:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponent-laws-practice-by-lee-w-fisher/ssssspqq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-laws-practice-by-lee-w-fisher/ssssspqq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-laws-practice-by-lee-w-fisher/ssssspqq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-laws-practice-by-lee-w-fisher/ssssspqq"/>
      <lastmod>2026-11-01T21:25:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-operations-and-properties/ssssspq1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-operations-and-properties/ssssspq1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-operations-and-properties/ssssspq1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-operations-and-properties/ssssspq1"/>
      <lastmod>2026-11-02T15:49:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-operations-and-properties/ssssspq1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-operations-and-properties/ssssspq1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-operations-and-properties/ssssspq1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-operations-and-properties/ssssspq1"/>
      <lastmod>2026-11-02T15:49:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pentagonal-prism-by-lew-w-s/ssssspqm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pentagonal-prism-by-lew-w-s/ssssspqm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pentagonal-prism-by-lew-w-s/ssssspqm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pentagonal-prism-by-lew-w-s/ssssspqm"/>
      <lastmod>2026-11-02T16:42:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pentagonal-prism-by-lew-w-s/ssssspqm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pentagonal-prism-by-lew-w-s/ssssspqm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pentagonal-prism-by-lew-w-s/ssssspqm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pentagonal-prism-by-lew-w-s/ssssspqm"/>
      <lastmod>2026-11-02T16:42:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/general-equations-of-a-projectile/ssssspqj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/general-equations-of-a-projectile/ssssspqj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/general-equations-of-a-projectile/ssssspqj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/general-equations-of-a-projectile/ssssspqj"/>
      <lastmod>2026-11-01T21:37:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/general-equations-of-a-projectile/ssssspqj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/general-equations-of-a-projectile/ssssspqj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/general-equations-of-a-projectile/ssssspqj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/general-equations-of-a-projectile/ssssspqj"/>
      <lastmod>2026-11-01T21:37:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/axis-aligned-ray-to-line-segment-intersection-no-division/ssssspqp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/axis-aligned-ray-to-line-segment-intersection-no-division/ssssspqp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/axis-aligned-ray-to-line-segment-intersection-no-division/ssssspqp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/axis-aligned-ray-to-line-segment-intersection-no-division/ssssspqp"/>
      <lastmod>2026-11-01T20:58:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/axis-aligned-ray-to-line-segment-intersection-no-division/ssssspqp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/axis-aligned-ray-to-line-segment-intersection-no-division/ssssspqp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/axis-aligned-ray-to-line-segment-intersection-no-division/ssssspqp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/axis-aligned-ray-to-line-segment-intersection-no-division/ssssspqp"/>
      <lastmod>2026-11-01T20:58:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-basketball-shot-self-test/ssssspqw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-basketball-shot-self-test/ssssspqw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-basketball-shot-self-test/ssssspqw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-basketball-shot-self-test/ssssspqw"/>
      <lastmod>2026-11-01T19:20:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-basketball-shot-self-test/ssssspqw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-basketball-shot-self-test/ssssspqw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-basketball-shot-self-test/ssssspqw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-basketball-shot-self-test/ssssspqw"/>
      <lastmod>2026-11-01T19:20:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practice-with-graphing-power-functions/ssssspq6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-with-graphing-power-functions/ssssspq6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-with-graphing-power-functions/ssssspq6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-with-graphing-power-functions/ssssspq6"/>
      <lastmod>2026-11-01T23:16:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practice-with-graphing-power-functions/ssssspq6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-with-graphing-power-functions/ssssspq6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-with-graphing-power-functions/ssssspq6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-with-graphing-power-functions/ssssspq6"/>
      <lastmod>2026-11-01T23:16:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-edgar/ssssspqg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-edgar/ssssspqg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-by-edgar/ssssspqg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-edgar/ssssspqg"/>
      <lastmod>2026-11-02T13:05:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-by-edgar/ssssspqg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-edgar/ssssspqg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-by-edgar/ssssspqg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-edgar/ssssspqg"/>
      <lastmod>2026-11-02T13:05:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-linear-transformations-vectors-and-polygons-under-matrix-action/ssssspq9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-linear-transformations-vectors-and-polygons-under-matrix-action/ssssspq9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-linear-transformations-vectors-and-polygons-under-matrix-action/ssssspq9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-linear-transformations-vectors-and-polygons-under-matrix-action/ssssspq9"/>
      <lastmod>2026-11-01T19:04:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-linear-transformations-vectors-and-polygons-under-matrix-action/ssssspq9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-linear-transformations-vectors-and-polygons-under-matrix-action/ssssspq9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-linear-transformations-vectors-and-polygons-under-matrix-action/ssssspq9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-linear-transformations-vectors-and-polygons-under-matrix-action/ssssspq9"/>
      <lastmod>2026-11-01T19:04:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-horizontal-vertical-lines/ssssspqe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-horizontal-vertical-lines/ssssspqe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-horizontal-vertical-lines/ssssspqe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-horizontal-vertical-lines/ssssspqe"/>
      <lastmod>2026-11-01T23:29:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-horizontal-vertical-lines/ssssspqe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-horizontal-vertical-lines/ssssspqe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-horizontal-vertical-lines/ssssspqe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-horizontal-vertical-lines/ssssspqe"/>
      <lastmod>2026-11-01T23:29:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drawing-cross-sections-of-a-cube/ssssspqv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-cross-sections-of-a-cube/ssssspqv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-cross-sections-of-a-cube/ssssspqv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-cross-sections-of-a-cube/ssssspqv"/>
      <lastmod>2026-11-02T12:41:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drawing-cross-sections-of-a-cube/ssssspqv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-cross-sections-of-a-cube/ssssspqv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-cross-sections-of-a-cube/ssssspqv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-cross-sections-of-a-cube/ssssspqv"/>
      <lastmod>2026-11-02T12:41:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/side-side-side-worksheet/ssssspq4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/side-side-side-worksheet/ssssspq4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/side-side-side-worksheet/ssssspq4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/side-side-side-worksheet/ssssspq4"/>
      <lastmod>2026-11-02T00:21:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/side-side-side-worksheet/ssssspq4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/side-side-side-worksheet/ssssspq4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/side-side-side-worksheet/ssssspq4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/side-side-side-worksheet/ssssspq4"/>
      <lastmod>2026-11-02T00:21:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/projectile-motion-height-simulation/ssssspql</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/projectile-motion-height-simulation/ssssspql"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/projectile-motion-height-simulation/ssssspql"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/projectile-motion-height-simulation/ssssspql"/>
      <lastmod>2026-11-02T18:52:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/projectile-motion-height-simulation/ssssspql</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/projectile-motion-height-simulation/ssssspql"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/projectile-motion-height-simulation/ssssspql"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/projectile-motion-height-simulation/ssssspql"/>
      <lastmod>2026-11-02T18:52:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/relationship-between-height-and-volume-of-a-square-based-pyramid/ssssspqy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relationship-between-height-and-volume-of-a-square-based-pyramid/ssssspqy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relationship-between-height-and-volume-of-a-square-based-pyramid/ssssspqy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relationship-between-height-and-volume-of-a-square-based-pyramid/ssssspqy"/>
      <lastmod>2026-11-01T21:52:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/relationship-between-height-and-volume-of-a-square-based-pyramid/ssssspqy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relationship-between-height-and-volume-of-a-square-based-pyramid/ssssspqy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relationship-between-height-and-volume-of-a-square-based-pyramid/ssssspqy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relationship-between-height-and-volume-of-a-square-based-pyramid/ssssspqy"/>
      <lastmod>2026-11-01T21:52:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-vector-equation-of-a-line-in-3d/ssssspqa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-vector-equation-of-a-line-in-3d/ssssspqa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-vector-equation-of-a-line-in-3d/ssssspqa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-vector-equation-of-a-line-in-3d/ssssspqa"/>
      <lastmod>2026-11-01T19:34:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-vector-equation-of-a-line-in-3d/ssssspqa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-vector-equation-of-a-line-in-3d/ssssspqa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-vector-equation-of-a-line-in-3d/ssssspqa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-vector-equation-of-a-line-in-3d/ssssspqa"/>
      <lastmod>2026-11-01T19:34:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/element-g-transformations/ssssspqc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/element-g-transformations/ssssspqc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/element-g-transformations/ssssspqc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/element-g-transformations/ssssspqc"/>
      <lastmod>2026-11-01T23:09:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/element-g-transformations/ssssspqc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/element-g-transformations/ssssspqc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/element-g-transformations/ssssspqc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/element-g-transformations/ssssspqc"/>
      <lastmod>2026-11-01T23:09:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translations-of-absolute-value-functions/ssssspqr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translations-of-absolute-value-functions/ssssspqr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translations-of-absolute-value-functions/ssssspqr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translations-of-absolute-value-functions/ssssspqr"/>
      <lastmod>2026-11-02T18:26:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translations-of-absolute-value-functions/ssssspqr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translations-of-absolute-value-functions/ssssspqr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translations-of-absolute-value-functions/ssssspqr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translations-of-absolute-value-functions/ssssspqr"/>
      <lastmod>2026-11-02T18:26:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-bisector-construction-by-mark-robinson/ssssspqh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-construction-by-mark-robinson/ssssspqh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisector-construction-by-mark-robinson/ssssspqh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-construction-by-mark-robinson/ssssspqh"/>
      <lastmod>2026-11-02T00:28:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-bisector-construction-by-mark-robinson/ssssspqh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-construction-by-mark-robinson/ssssspqh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisector-construction-by-mark-robinson/ssssspqh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-construction-by-mark-robinson/ssssspqh"/>
      <lastmod>2026-11-02T00:28:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-and-intersection-demo/ssssspqt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-intersection-demo/ssssspqt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-intersection-demo/ssssspqt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-intersection-demo/ssssspqt"/>
      <lastmod>2026-11-02T17:40:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-and-intersection-demo/ssssspqt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-intersection-demo/ssssspqt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-intersection-demo/ssssspqt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-intersection-demo/ssssspqt"/>
      <lastmod>2026-11-02T17:40:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflecting-about-lines-example-18/ssssspqx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflecting-about-lines-example-18/ssssspqx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflecting-about-lines-example-18/ssssspqx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflecting-about-lines-example-18/ssssspqx"/>
      <lastmod>2026-11-02T03:17:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflecting-about-lines-example-18/ssssspqx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflecting-about-lines-example-18/ssssspqx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflecting-about-lines-example-18/ssssspqx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflecting-about-lines-example-18/ssssspqx"/>
      <lastmod>2026-11-02T03:17:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/radians-in-unit-circle-by-werner-pries/ssssspqi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/radians-in-unit-circle-by-werner-pries/ssssspqi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/radians-in-unit-circle-by-werner-pries/ssssspqi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/radians-in-unit-circle-by-werner-pries/ssssspqi"/>
      <lastmod>2026-11-02T02:57:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/radians-in-unit-circle-by-werner-pries/ssssspqi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/radians-in-unit-circle-by-werner-pries/ssssspqi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/radians-in-unit-circle-by-werner-pries/ssssspqi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/radians-in-unit-circle-by-werner-pries/ssssspqi"/>
      <lastmod>2026-11-02T02:57:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/are-all-equilateral-triangles-similar/ssssspqo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/are-all-equilateral-triangles-similar/ssssspqo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/are-all-equilateral-triangles-similar/ssssspqo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/are-all-equilateral-triangles-similar/ssssspqo"/>
      <lastmod>2026-11-01T19:34:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/are-all-equilateral-triangles-similar/ssssspqo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/are-all-equilateral-triangles-similar/ssssspqo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/are-all-equilateral-triangles-similar/ssssspqo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/are-all-equilateral-triangles-similar/ssssspqo"/>
      <lastmod>2026-11-01T19:34:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-with-diagonals/sssssp1s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-with-diagonals/sssssp1s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-with-diagonals/sssssp1s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-with-diagonals/sssssp1s"/>
      <lastmod>2026-11-02T15:07:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-with-diagonals/sssssp1s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-with-diagonals/sssssp1s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-with-diagonals/sssssp1s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-with-diagonals/sssssp1s"/>
      <lastmod>2026-11-02T15:07:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/three-fourths/sssssp17</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-fourths/sssssp17"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-fourths/sssssp17"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-fourths/sssssp17"/>
      <lastmod>2026-11-02T12:30:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/three-fourths/sssssp17</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-fourths/sssssp17"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-fourths/sssssp17"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-fourths/sssssp17"/>
      <lastmod>2026-11-02T12:30:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angles-of-elevation-and-depression-activity/sssssp1n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-of-elevation-and-depression-activity/sssssp1n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-of-elevation-and-depression-activity/sssssp1n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-of-elevation-and-depression-activity/sssssp1n"/>
      <lastmod>2026-11-01T21:11:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angles-of-elevation-and-depression-activity/sssssp1n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-of-elevation-and-depression-activity/sssssp1n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-of-elevation-and-depression-activity/sssssp1n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-of-elevation-and-depression-activity/sssssp1n"/>
      <lastmod>2026-11-01T21:11:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equilateral-triangle-by-student-padije16/sssssp12</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equilateral-triangle-by-student-padije16/sssssp12"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equilateral-triangle-by-student-padije16/sssssp12"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equilateral-triangle-by-student-padije16/sssssp12"/>
      <lastmod>2026-11-02T16:53:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equilateral-triangle-by-student-padije16/sssssp12</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equilateral-triangle-by-student-padije16/sssssp12"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equilateral-triangle-by-student-padije16/sssssp12"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equilateral-triangle-by-student-padije16/sssssp12"/>
      <lastmod>2026-11-02T16:53:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angles-in-the-four-quadrants/sssssp1k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-in-the-four-quadrants/sssssp1k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-in-the-four-quadrants/sssssp1k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-in-the-four-quadrants/sssssp1k"/>
      <lastmod>2026-11-02T09:55:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angles-in-the-four-quadrants/sssssp1k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-in-the-four-quadrants/sssssp1k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-in-the-four-quadrants/sssssp1k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-in-the-four-quadrants/sssssp1k"/>
      <lastmod>2026-11-02T09:55:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animation-198-triangle-transformation/sssssp1z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-198-triangle-transformation/sssssp1z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-198-triangle-transformation/sssssp1z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-198-triangle-transformation/sssssp1z"/>
      <lastmod>2026-11-02T13:50:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animation-198-triangle-transformation/sssssp1z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-198-triangle-transformation/sssssp1z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-198-triangle-transformation/sssssp1z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-198-triangle-transformation/sssssp1z"/>
      <lastmod>2026-11-02T13:50:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-systems-of-linear-equations-by-elimination/sssssp10</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-systems-of-linear-equations-by-elimination/sssssp10"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-systems-of-linear-equations-by-elimination/sssssp10"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-systems-of-linear-equations-by-elimination/sssssp10"/>
      <lastmod>2026-11-02T18:56:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-systems-of-linear-equations-by-elimination/sssssp10</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-systems-of-linear-equations-by-elimination/sssssp10"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-systems-of-linear-equations-by-elimination/sssssp10"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-systems-of-linear-equations-by-elimination/sssssp10"/>
      <lastmod>2026-11-02T18:56:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-definition/sssssp1d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-definition/sssssp1d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-definition/sssssp1d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-definition/sssssp1d"/>
      <lastmod>2026-11-02T16:39:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-definition/sssssp1d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-definition/sssssp1d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-definition/sssssp1d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-definition/sssssp1d"/>
      <lastmod>2026-11-02T16:39:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drawing-views-of-composite-prisms/sssssp1f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-views-of-composite-prisms/sssssp1f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-views-of-composite-prisms/sssssp1f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-views-of-composite-prisms/sssssp1f"/>
      <lastmod>2026-11-02T17:43:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drawing-views-of-composite-prisms/sssssp1f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-views-of-composite-prisms/sssssp1f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-views-of-composite-prisms/sssssp1f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-views-of-composite-prisms/sssssp1f"/>
      <lastmod>2026-11-02T17:43:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-linear-programming-and-function-graphing-exploration/sssssp18</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-linear-programming-and-function-graphing-exploration/sssssp18"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-linear-programming-and-function-graphing-exploration/sssssp18"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-linear-programming-and-function-graphing-exploration/sssssp18"/>
      <lastmod>2026-11-02T00:41:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-linear-programming-and-function-graphing-exploration/sssssp18</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-linear-programming-and-function-graphing-exploration/sssssp18"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-linear-programming-and-function-graphing-exploration/sssssp18"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-linear-programming-and-function-graphing-exploration/sssssp18"/>
      <lastmod>2026-11-02T00:41:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-packing-with-fractional-edge-lengths/sssssp1u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-packing-with-fractional-edge-lengths/sssssp1u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-packing-with-fractional-edge-lengths/sssssp1u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-packing-with-fractional-edge-lengths/sssssp1u"/>
      <lastmod>2026-11-02T13:06:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-packing-with-fractional-edge-lengths/sssssp1u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-packing-with-fractional-edge-lengths/sssssp1u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-packing-with-fractional-edge-lengths/sssssp1u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-packing-with-fractional-edge-lengths/sssssp1u"/>
      <lastmod>2026-11-02T13:06:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/formula-for-finding-angle-between-two-planes/sssssp15</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/formula-for-finding-angle-between-two-planes/sssssp15"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/formula-for-finding-angle-between-two-planes/sssssp15"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/formula-for-finding-angle-between-two-planes/sssssp15"/>
      <lastmod>2026-11-02T02:54:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/formula-for-finding-angle-between-two-planes/sssssp15</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/formula-for-finding-angle-between-two-planes/sssssp15"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/formula-for-finding-angle-between-two-planes/sssssp15"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/formula-for-finding-angle-between-two-planes/sssssp15"/>
      <lastmod>2026-11-02T02:54:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-patterns-exploration/sssssp1b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-patterns-exploration/sssssp1b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-patterns-exploration/sssssp1b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-patterns-exploration/sssssp1b"/>
      <lastmod>2026-11-02T03:02:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-patterns-exploration/sssssp1b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-patterns-exploration/sssssp1b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-patterns-exploration/sssssp1b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-patterns-exploration/sssssp1b"/>
      <lastmod>2026-11-02T03:02:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-with-the-same-center-as-the-incircle-of-any-triangle/sssssp13</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-with-the-same-center-as-the-incircle-of-any-triangle/sssssp13"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-with-the-same-center-as-the-incircle-of-any-triangle/sssssp13"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-with-the-same-center-as-the-incircle-of-any-triangle/sssssp13"/>
      <lastmod>2026-11-02T17:00:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-with-the-same-center-as-the-incircle-of-any-triangle/sssssp13</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-with-the-same-center-as-the-incircle-of-any-triangle/sssssp13"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-with-the-same-center-as-the-incircle-of-any-triangle/sssssp13"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-with-the-same-center-as-the-incircle-of-any-triangle/sssssp13"/>
      <lastmod>2026-11-02T17:00:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-a-parallelogram-based-solid-with-random-experiment-statistics/sssssp1q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-parallelogram-based-solid-with-random-experiment-statistics/sssssp1q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-parallelogram-based-solid-with-random-experiment-statistics/sssssp1q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-parallelogram-based-solid-with-random-experiment-statistics/sssssp1q"/>
      <lastmod>2026-11-02T00:26:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-a-parallelogram-based-solid-with-random-experiment-statistics/sssssp1q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-parallelogram-based-solid-with-random-experiment-statistics/sssssp1q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-parallelogram-based-solid-with-random-experiment-statistics/sssssp1q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-parallelogram-based-solid-with-random-experiment-statistics/sssssp1q"/>
      <lastmod>2026-11-02T00:26:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-right-triangles/sssssp11</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-right-triangles/sssssp11"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-right-triangles/sssssp11"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-right-triangles/sssssp11"/>
      <lastmod>2026-11-01T21:54:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-right-triangles/sssssp11</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-right-triangles/sssssp11"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-right-triangles/sssssp11"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-right-triangles/sssssp11"/>
      <lastmod>2026-11-01T21:54:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-circles-and-spheres/sssssp1m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-circles-and-spheres/sssssp1m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-circles-and-spheres/sssssp1m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-circles-and-spheres/sssssp1m"/>
      <lastmod>2026-11-02T18:41:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-circles-and-spheres/sssssp1m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-circles-and-spheres/sssssp1m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-circles-and-spheres/sssssp1m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-circles-and-spheres/sssssp1m"/>
      <lastmod>2026-11-02T18:41:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-geometry-illustration/sssssp1j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration/sssssp1j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-illustration/sssssp1j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration/sssssp1j"/>
      <lastmod>2026-11-02T03:09:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-geometry-illustration/sssssp1j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration/sssssp1j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-illustration/sssssp1j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration/sssssp1j"/>
      <lastmod>2026-11-02T03:09:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cas-tools-tutorial/sssssp1p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cas-tools-tutorial/sssssp1p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cas-tools-tutorial/sssssp1p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cas-tools-tutorial/sssssp1p"/>
      <lastmod>2026-11-01T22:00:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cas-tools-tutorial/sssssp1p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cas-tools-tutorial/sssssp1p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cas-tools-tutorial/sssssp1p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cas-tools-tutorial/sssssp1p"/>
      <lastmod>2026-11-01T22:00:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-bisector-definition/sssssp1w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-definition/sssssp1w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisector-definition/sssssp1w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-definition/sssssp1w"/>
      <lastmod>2026-11-01T21:54:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-bisector-definition/sssssp1w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-definition/sssssp1w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisector-definition/sssssp1w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-definition/sssssp1w"/>
      <lastmod>2026-11-01T21:54:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plane-demonstration-by-tenkosky/sssssp16</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plane-demonstration-by-tenkosky/sssssp16"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plane-demonstration-by-tenkosky/sssssp16"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plane-demonstration-by-tenkosky/sssssp16"/>
      <lastmod>2026-11-02T00:23:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plane-demonstration-by-tenkosky/sssssp16</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plane-demonstration-by-tenkosky/sssssp16"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plane-demonstration-by-tenkosky/sssssp16"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plane-demonstration-by-tenkosky/sssssp16"/>
      <lastmod>2026-11-02T00:23:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-by-uleth/sssssp1g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-by-uleth/sssssp1g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-by-uleth/sssssp1g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-by-uleth/sssssp1g"/>
      <lastmod>2026-11-02T18:53:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-by-uleth/sssssp1g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-by-uleth/sssssp1g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-by-uleth/sssssp1g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-by-uleth/sssssp1g"/>
      <lastmod>2026-11-02T18:53:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/root-rectangles-1/sssssp19</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/root-rectangles-1/sssssp19"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/root-rectangles-1/sssssp19"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/root-rectangles-1/sssssp19"/>
      <lastmod>2026-11-01T23:29:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/root-rectangles-1/sssssp19</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/root-rectangles-1/sssssp19"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/root-rectangles-1/sssssp19"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/root-rectangles-1/sssssp19"/>
      <lastmod>2026-11-01T23:29:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/point-symmetry-another-perspective/sssssp1e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-symmetry-another-perspective/sssssp1e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-symmetry-another-perspective/sssssp1e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-symmetry-another-perspective/sssssp1e"/>
      <lastmod>2026-11-02T12:08:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/point-symmetry-another-perspective/sssssp1e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-symmetry-another-perspective/sssssp1e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-symmetry-another-perspective/sssssp1e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-symmetry-another-perspective/sssssp1e"/>
      <lastmod>2026-11-02T12:08:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-calculator-by-john-golden/sssssp1v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-calculator-by-john-golden/sssssp1v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-calculator-by-john-golden/sssssp1v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-calculator-by-john-golden/sssssp1v"/>
      <lastmod>2026-11-02T09:38:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-calculator-by-john-golden/sssssp1v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-calculator-by-john-golden/sssssp1v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-calculator-by-john-golden/sssssp1v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-calculator-by-john-golden/sssssp1v"/>
      <lastmod>2026-11-02T09:38:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponent-rule-practice/sssssp14</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-rule-practice/sssssp14"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-rule-practice/sssssp14"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-rule-practice/sssssp14"/>
      <lastmod>2026-11-02T18:46:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponent-rule-practice/sssssp14</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-rule-practice/sssssp14"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-rule-practice/sssssp14"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-rule-practice/sssssp14"/>
      <lastmod>2026-11-02T18:46:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/factored-form-of-quadratics/sssssp1l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factored-form-of-quadratics/sssssp1l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factored-form-of-quadratics/sssssp1l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factored-form-of-quadratics/sssssp1l"/>
      <lastmod>2026-11-01T21:07:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/factored-form-of-quadratics/sssssp1l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factored-form-of-quadratics/sssssp1l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factored-form-of-quadratics/sssssp1l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factored-form-of-quadratics/sssssp1l"/>
      <lastmod>2026-11-01T21:07:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/motion-attractor-with-many-balls/sssssp1y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/motion-attractor-with-many-balls/sssssp1y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/motion-attractor-with-many-balls/sssssp1y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/motion-attractor-with-many-balls/sssssp1y"/>
      <lastmod>2026-11-01T23:49:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/motion-attractor-with-many-balls/sssssp1y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/motion-attractor-with-many-balls/sssssp1y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/motion-attractor-with-many-balls/sssssp1y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/motion-attractor-with-many-balls/sssssp1y"/>
      <lastmod>2026-11-01T23:49:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-illustration-of-two-internally-tangent-circles-with-an-inscribed-equilat/sssssp1a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-two-internally-tangent-circles-with-an-inscribed-equilat/sssssp1a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-two-internally-tangent-circles-with-an-inscribed-equilat/sssssp1a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-two-internally-tangent-circles-with-an-inscribed-equilat/sssssp1a"/>
      <lastmod>2026-11-02T17:48:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-illustration-of-two-internally-tangent-circles-with-an-inscribed-equilat/sssssp1a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-two-internally-tangent-circles-with-an-inscribed-equilat/sssssp1a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-two-internally-tangent-circles-with-an-inscribed-equilat/sssssp1a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-two-internally-tangent-circles-with-an-inscribed-equilat/sssssp1a"/>
      <lastmod>2026-11-02T17:48:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/closest-points-distance-calculation-and-geometric-construction/sssssp1c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/closest-points-distance-calculation-and-geometric-construction/sssssp1c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/closest-points-distance-calculation-and-geometric-construction/sssssp1c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/closest-points-distance-calculation-and-geometric-construction/sssssp1c"/>
      <lastmod>2026-11-02T13:19:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/closest-points-distance-calculation-and-geometric-construction/sssssp1c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/closest-points-distance-calculation-and-geometric-construction/sssssp1c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/closest-points-distance-calculation-and-geometric-construction/sssssp1c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/closest-points-distance-calculation-and-geometric-construction/sssssp1c"/>
      <lastmod>2026-11-02T13:19:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/baravelle-spirals/sssssp1r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/baravelle-spirals/sssssp1r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/baravelle-spirals/sssssp1r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/baravelle-spirals/sssssp1r"/>
      <lastmod>2026-11-01T23:21:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/baravelle-spirals/sssssp1r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/baravelle-spirals/sssssp1r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/baravelle-spirals/sssssp1r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/baravelle-spirals/sssssp1r"/>
      <lastmod>2026-11-01T23:21:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/magic-straight-line-through-a-hyperboloid/sssssp1h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/magic-straight-line-through-a-hyperboloid/sssssp1h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/magic-straight-line-through-a-hyperboloid/sssssp1h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/magic-straight-line-through-a-hyperboloid/sssssp1h"/>
      <lastmod>2026-11-01T20:40:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/magic-straight-line-through-a-hyperboloid/sssssp1h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/magic-straight-line-through-a-hyperboloid/sssssp1h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/magic-straight-line-through-a-hyperboloid/sssssp1h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/magic-straight-line-through-a-hyperboloid/sssssp1h"/>
      <lastmod>2026-11-01T20:40:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angles-part-4/sssssp1t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-part-4/sssssp1t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-part-4/sssssp1t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-part-4/sssssp1t"/>
      <lastmod>2026-11-02T18:16:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angles-part-4/sssssp1t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-part-4/sssssp1t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-part-4/sssssp1t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-part-4/sssssp1t"/>
      <lastmod>2026-11-02T18:16:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/series-of-conjugate-conics/sssssp1x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/series-of-conjugate-conics/sssssp1x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/series-of-conjugate-conics/sssssp1x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/series-of-conjugate-conics/sssssp1x"/>
      <lastmod>2026-11-01T20:44:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/series-of-conjugate-conics/sssssp1x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/series-of-conjugate-conics/sssssp1x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/series-of-conjugate-conics/sssssp1x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/series-of-conjugate-conics/sssssp1x"/>
      <lastmod>2026-11-01T20:44:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/oblique-cone-by-marylea6/sssssp1i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-cone-by-marylea6/sssssp1i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-cone-by-marylea6/sssssp1i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-cone-by-marylea6/sssssp1i"/>
      <lastmod>2026-11-02T17:14:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/oblique-cone-by-marylea6/sssssp1i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-cone-by-marylea6/sssssp1i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-cone-by-marylea6/sssssp1i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-cone-by-marylea6/sssssp1i"/>
      <lastmod>2026-11-02T17:14:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/create-a-candy-bar/sssssp1o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-a-candy-bar/sssssp1o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-a-candy-bar/sssssp1o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-a-candy-bar/sssssp1o"/>
      <lastmod>2026-11-02T02:43:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/create-a-candy-bar/sssssp1o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-a-candy-bar/sssssp1o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-a-candy-bar/sssssp1o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-a-candy-bar/sssssp1o"/>
      <lastmod>2026-11-02T02:43:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-functions/ssssspms</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-functions/ssssspms"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-trigonometric-functions/ssssspms"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-functions/ssssspms"/>
      <lastmod>2026-11-01T23:14:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-trigonometric-functions/ssssspms</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-functions/ssssspms"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-trigonometric-functions/ssssspms"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-trigonometric-functions/ssssspms"/>
      <lastmod>2026-11-01T23:14:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/eratosthenes-sieve-3d/ssssspm7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eratosthenes-sieve-3d/ssssspm7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eratosthenes-sieve-3d/ssssspm7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eratosthenes-sieve-3d/ssssspm7"/>
      <lastmod>2026-11-02T16:36:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/eratosthenes-sieve-3d/ssssspm7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eratosthenes-sieve-3d/ssssspm7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eratosthenes-sieve-3d/ssssspm7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eratosthenes-sieve-3d/ssssspm7"/>
      <lastmod>2026-11-02T16:36:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-constructions-example/ssssspmn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-constructions-example/ssssspmn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-constructions-example/ssssspmn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-constructions-example/ssssspmn"/>
      <lastmod>2026-11-01T23:16:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-constructions-example/ssssspmn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-constructions-example/ssssspmn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-constructions-example/ssssspmn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-constructions-example/ssssspmn"/>
      <lastmod>2026-11-01T23:16:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cuboid-and-yangma/ssssspm2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cuboid-and-yangma/ssssspm2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cuboid-and-yangma/ssssspm2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cuboid-and-yangma/ssssspm2"/>
      <lastmod>2026-11-02T15:03:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cuboid-and-yangma/ssssspm2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cuboid-and-yangma/ssssspm2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cuboid-and-yangma/ssssspm2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cuboid-and-yangma/ssssspm2"/>
      <lastmod>2026-11-02T15:03:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/basic-terms-about-circles/ssssspmk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-terms-about-circles/ssssspmk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-terms-about-circles/ssssspmk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-terms-about-circles/ssssspmk"/>
      <lastmod>2026-11-01T21:18:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/basic-terms-about-circles/ssssspmk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-terms-about-circles/ssssspmk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-terms-about-circles/ssssspmk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-terms-about-circles/ssssspmk"/>
      <lastmod>2026-11-01T21:18:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/problem-10b-trapezoid-fractal-geometry-and-normal-distribution/ssssspmz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/problem-10b-trapezoid-fractal-geometry-and-normal-distribution/ssssspmz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/problem-10b-trapezoid-fractal-geometry-and-normal-distribution/ssssspmz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/problem-10b-trapezoid-fractal-geometry-and-normal-distribution/ssssspmz"/>
      <lastmod>2026-11-02T13:37:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/problem-10b-trapezoid-fractal-geometry-and-normal-distribution/ssssspmz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/problem-10b-trapezoid-fractal-geometry-and-normal-distribution/ssssspmz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/problem-10b-trapezoid-fractal-geometry-and-normal-distribution/ssssspmz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/problem-10b-trapezoid-fractal-geometry-and-normal-distribution/ssssspmz"/>
      <lastmod>2026-11-02T13:37:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-an-isosceles-trapezium/ssssspm0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-an-isosceles-trapezium/ssssspm0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-an-isosceles-trapezium/ssssspm0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-an-isosceles-trapezium/ssssspm0"/>
      <lastmod>2026-11-01T23:30:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-an-isosceles-trapezium/ssssspm0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-an-isosceles-trapezium/ssssspm0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-an-isosceles-trapezium/ssssspm0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-an-isosceles-trapezium/ssssspm0"/>
      <lastmod>2026-11-01T23:30:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-and-law-of-cosines-demo/ssssspmd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-and-law-of-cosines-demo/ssssspmd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-and-law-of-cosines-demo/ssssspmd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-and-law-of-cosines-demo/ssssspmd"/>
      <lastmod>2026-11-01T21:29:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-and-law-of-cosines-demo/ssssspmd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-and-law-of-cosines-demo/ssssspmd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-and-law-of-cosines-demo/ssssspmd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-and-law-of-cosines-demo/ssssspmd"/>
      <lastmod>2026-11-01T21:29:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-subtraction-demonstration-by-zach-schaver/ssssspmf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-subtraction-demonstration-by-zach-schaver/ssssspmf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-subtraction-demonstration-by-zach-schaver/ssssspmf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-subtraction-demonstration-by-zach-schaver/ssssspmf"/>
      <lastmod>2026-11-02T02:42:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-subtraction-demonstration-by-zach-schaver/ssssspmf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-subtraction-demonstration-by-zach-schaver/ssssspmf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-subtraction-demonstration-by-zach-schaver/ssssspmf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-subtraction-demonstration-by-zach-schaver/ssssspmf"/>
      <lastmod>2026-11-02T02:42:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-mystery-of-the-lemniscate/ssssspm8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-mystery-of-the-lemniscate/ssssspm8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-mystery-of-the-lemniscate/ssssspm8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-mystery-of-the-lemniscate/ssssspm8"/>
      <lastmod>2026-11-02T18:04:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-mystery-of-the-lemniscate/ssssspm8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-mystery-of-the-lemniscate/ssssspm8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-mystery-of-the-lemniscate/ssssspm8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-mystery-of-the-lemniscate/ssssspm8"/>
      <lastmod>2026-11-02T18:04:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-unit-7/ssssspmu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-unit-7/ssssspmu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-unit-7/ssssspmu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-unit-7/ssssspmu"/>
      <lastmod>2026-11-02T17:06:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-unit-7/ssssspmu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-unit-7/ssssspmu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-unit-7/ssssspmu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-unit-7/ssssspmu"/>
      <lastmod>2026-11-02T17:06:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadrilateral-centroid-and-circumcircle-demo/ssssspm5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-centroid-and-circumcircle-demo/ssssspm5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-centroid-and-circumcircle-demo/ssssspm5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-centroid-and-circumcircle-demo/ssssspm5"/>
      <lastmod>2026-11-01T19:26:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadrilateral-centroid-and-circumcircle-demo/ssssspm5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-centroid-and-circumcircle-demo/ssssspm5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-centroid-and-circumcircle-demo/ssssspm5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-centroid-and-circumcircle-demo/ssssspm5"/>
      <lastmod>2026-11-01T19:26:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bezier-cylinder-volume-calculation/ssssspmb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bezier-cylinder-volume-calculation/ssssspmb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bezier-cylinder-volume-calculation/ssssspmb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bezier-cylinder-volume-calculation/ssssspmb"/>
      <lastmod>2026-11-02T08:52:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bezier-cylinder-volume-calculation/ssssspmb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bezier-cylinder-volume-calculation/ssssspmb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bezier-cylinder-volume-calculation/ssssspmb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bezier-cylinder-volume-calculation/ssssspmb"/>
      <lastmod>2026-11-02T08:52:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similarity-transformation-of-triangles/ssssspm3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similarity-transformation-of-triangles/ssssspm3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similarity-transformation-of-triangles/ssssspm3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similarity-transformation-of-triangles/ssssspm3"/>
      <lastmod>2026-11-01T19:13:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similarity-transformation-of-triangles/ssssspm3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similarity-transformation-of-triangles/ssssspm3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similarity-transformation-of-triangles/ssssspm3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similarity-transformation-of-triangles/ssssspm3"/>
      <lastmod>2026-11-01T19:13:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-between-ellipse-and-semi-circle/ssssspmq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-between-ellipse-and-semi-circle/ssssspmq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-between-ellipse-and-semi-circle/ssssspmq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-between-ellipse-and-semi-circle/ssssspmq"/>
      <lastmod>2026-11-02T08:30:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-between-ellipse-and-semi-circle/ssssspmq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-between-ellipse-and-semi-circle/ssssspmq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-between-ellipse-and-semi-circle/ssssspmq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-between-ellipse-and-semi-circle/ssssspmq"/>
      <lastmod>2026-11-02T08:30:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-and-subtraction-translation-and-geometric-construction/ssssspm1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-and-subtraction-translation-and-geometric-construction/ssssspm1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-and-subtraction-translation-and-geometric-construction/ssssspm1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-and-subtraction-translation-and-geometric-construction/ssssspm1"/>
      <lastmod>2026-11-01T21:13:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-and-subtraction-translation-and-geometric-construction/ssssspm1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-and-subtraction-translation-and-geometric-construction/ssssspm1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-and-subtraction-translation-and-geometric-construction/ssssspm1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-and-subtraction-translation-and-geometric-construction/ssssspm1"/>
      <lastmod>2026-11-01T21:13:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/set-example-1/ssssspmm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/set-example-1/ssssspmm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/set-example-1/ssssspmm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/set-example-1/ssssspmm"/>
      <lastmod>2026-11-01T21:10:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/set-example-1/ssssspmm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/set-example-1/ssssspmm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/set-example-1/ssssspmm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/set-example-1/ssssspmm"/>
      <lastmod>2026-11-01T21:10:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logo-of-rioja-innovation-system/ssssspmj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logo-of-rioja-innovation-system/ssssspmj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logo-of-rioja-innovation-system/ssssspmj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logo-of-rioja-innovation-system/ssssspmj"/>
      <lastmod>2026-11-01T19:35:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logo-of-rioja-innovation-system/ssssspmj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logo-of-rioja-innovation-system/ssssspmj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logo-of-rioja-innovation-system/ssssspmj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logo-of-rioja-innovation-system/ssssspmj"/>
      <lastmod>2026-11-01T19:35:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-properties-of-a-parabola-computer-assisted-proof/ssssspmp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-properties-of-a-parabola-computer-assisted-proof/ssssspmp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-properties-of-a-parabola-computer-assisted-proof/ssssspmp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-properties-of-a-parabola-computer-assisted-proof/ssssspmp"/>
      <lastmod>2026-11-02T16:45:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-properties-of-a-parabola-computer-assisted-proof/ssssspmp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-properties-of-a-parabola-computer-assisted-proof/ssssspmp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-properties-of-a-parabola-computer-assisted-proof/ssssspmp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-properties-of-a-parabola-computer-assisted-proof/ssssspmp"/>
      <lastmod>2026-11-02T16:45:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-unit-circle-by-ms-kaeli/ssssspmw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-unit-circle-by-ms-kaeli/ssssspmw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-unit-circle-by-ms-kaeli/ssssspmw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-unit-circle-by-ms-kaeli/ssssspmw"/>
      <lastmod>2026-11-02T00:10:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-unit-circle-by-ms-kaeli/ssssspmw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-unit-circle-by-ms-kaeli/ssssspmw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-unit-circle-by-ms-kaeli/ssssspmw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-unit-circle-by-ms-kaeli/ssssspmw"/>
      <lastmod>2026-11-02T00:10:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-equations-in-2-variables/ssssspm6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-equations-in-2-variables/ssssspm6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-equations-in-2-variables/ssssspm6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-equations-in-2-variables/ssssspm6"/>
      <lastmod>2026-11-02T00:14:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-equations-in-2-variables/ssssspm6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-equations-in-2-variables/ssssspm6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-equations-in-2-variables/ssssspm6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-equations-in-2-variables/ssssspm6"/>
      <lastmod>2026-11-02T00:14:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-parallelogram/ssssspmg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-parallelogram/ssssspmg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-parallelogram/ssssspmg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-parallelogram/ssssspmg"/>
      <lastmod>2026-11-02T02:53:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-parallelogram/ssssspmg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-parallelogram/ssssspmg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-parallelogram/ssssspmg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-parallelogram/ssssspmg"/>
      <lastmod>2026-11-02T02:53:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-ratios-by-renee-wells/ssssspm9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-by-renee-wells/ssssspm9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-by-renee-wells/ssssspm9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-by-renee-wells/ssssspm9"/>
      <lastmod>2026-11-02T17:56:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-ratios-by-renee-wells/ssssspm9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-by-renee-wells/ssssspm9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-by-renee-wells/ssssspm9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-by-renee-wells/ssssspm9"/>
      <lastmod>2026-11-02T17:56:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definite-integral-as-a-right-hand-sum/ssssspme</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-as-a-right-hand-sum/ssssspme"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-as-a-right-hand-sum/ssssspme"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-as-a-right-hand-sum/ssssspme"/>
      <lastmod>2026-11-02T18:48:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definite-integral-as-a-right-hand-sum/ssssspme</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-as-a-right-hand-sum/ssssspme"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-as-a-right-hand-sum/ssssspme"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-as-a-right-hand-sum/ssssspme"/>
      <lastmod>2026-11-02T18:48:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/central-angles-inscribed-angles-and-their-intercepted-arcs/ssssspmv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/central-angles-inscribed-angles-and-their-intercepted-arcs/ssssspmv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/central-angles-inscribed-angles-and-their-intercepted-arcs/ssssspmv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/central-angles-inscribed-angles-and-their-intercepted-arcs/ssssspmv"/>
      <lastmod>2026-11-02T08:58:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/central-angles-inscribed-angles-and-their-intercepted-arcs/ssssspmv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/central-angles-inscribed-angles-and-their-intercepted-arcs/ssssspmv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/central-angles-inscribed-angles-and-their-intercepted-arcs/ssssspmv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/central-angles-inscribed-angles-and-their-intercepted-arcs/ssssspmv"/>
      <lastmod>2026-11-02T08:58:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-demonstration-by-ca-citra-ca/ssssspm4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-demonstration-by-ca-citra-ca/ssssspm4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-demonstration-by-ca-citra-ca/ssssspm4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-demonstration-by-ca-citra-ca/ssssspm4"/>
      <lastmod>2026-11-02T16:31:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-demonstration-by-ca-citra-ca/ssssspm4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-demonstration-by-ca-citra-ca/ssssspm4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-demonstration-by-ca-citra-ca/ssssspm4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-demonstration-by-ca-citra-ca/ssssspm4"/>
      <lastmod>2026-11-02T16:31:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cumulative-curve/ssssspml</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cumulative-curve/ssssspml"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cumulative-curve/ssssspml"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cumulative-curve/ssssspml"/>
      <lastmod>2026-11-01T23:38:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cumulative-curve/ssssspml</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cumulative-curve/ssssspml"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cumulative-curve/ssssspml"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cumulative-curve/ssssspml"/>
      <lastmod>2026-11-01T23:38:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/collinear-points/ssssspmy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/collinear-points/ssssspmy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/collinear-points/ssssspmy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/collinear-points/ssssspmy"/>
      <lastmod>2026-11-02T17:01:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/collinear-points/ssssspmy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/collinear-points/ssssspmy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/collinear-points/ssssspmy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/collinear-points/ssssspmy"/>
      <lastmod>2026-11-02T17:01:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-hexagon/ssssspma</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-hexagon/ssssspma"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-hexagon/ssssspma"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-hexagon/ssssspma"/>
      <lastmod>2026-11-01T21:30:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-hexagon/ssssspma</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-hexagon/ssssspma"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-hexagon/ssssspma"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-hexagon/ssssspma"/>
      <lastmod>2026-11-01T21:30:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersecting-planes/ssssspmc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersecting-planes/ssssspmc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersecting-planes/ssssspmc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersecting-planes/ssssspmc"/>
      <lastmod>2026-11-01T21:32:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersecting-planes/ssssspmc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersecting-planes/ssssspmc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersecting-planes/ssssspmc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersecting-planes/ssssspmc"/>
      <lastmod>2026-11-01T21:32:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/using-a-ruler-centimeter-and-meter/ssssspmr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-a-ruler-centimeter-and-meter/ssssspmr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-a-ruler-centimeter-and-meter/ssssspmr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-a-ruler-centimeter-and-meter/ssssspmr"/>
      <lastmod>2026-11-02T17:07:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/using-a-ruler-centimeter-and-meter/ssssspmr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-a-ruler-centimeter-and-meter/ssssspmr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-a-ruler-centimeter-and-meter/ssssspmr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-a-ruler-centimeter-and-meter/ssssspmr"/>
      <lastmod>2026-11-02T17:07:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/stretching-triangles-multiplying-vs-adding-a-unit/ssssspmh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/stretching-triangles-multiplying-vs-adding-a-unit/ssssspmh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/stretching-triangles-multiplying-vs-adding-a-unit/ssssspmh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/stretching-triangles-multiplying-vs-adding-a-unit/ssssspmh"/>
      <lastmod>2026-11-02T00:23:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/stretching-triangles-multiplying-vs-adding-a-unit/ssssspmh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/stretching-triangles-multiplying-vs-adding-a-unit/ssssspmh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/stretching-triangles-multiplying-vs-adding-a-unit/ssssspmh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/stretching-triangles-multiplying-vs-adding-a-unit/ssssspmh"/>
      <lastmod>2026-11-02T00:23:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-equation-by-jason-wofsey/ssssspmt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-equation-by-jason-wofsey/ssssspmt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-equation-by-jason-wofsey/ssssspmt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-equation-by-jason-wofsey/ssssspmt"/>
      <lastmod>2026-11-02T14:55:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-equation-by-jason-wofsey/ssssspmt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-equation-by-jason-wofsey/ssssspmt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-equation-by-jason-wofsey/ssssspmt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-equation-by-jason-wofsey/ssssspmt"/>
      <lastmod>2026-11-02T14:55:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integration-by-substitution-demo-by-ravinder-kumar/ssssspmx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integration-by-substitution-demo-by-ravinder-kumar/ssssspmx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integration-by-substitution-demo-by-ravinder-kumar/ssssspmx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integration-by-substitution-demo-by-ravinder-kumar/ssssspmx"/>
      <lastmod>2026-11-01T21:35:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integration-by-substitution-demo-by-ravinder-kumar/ssssspmx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integration-by-substitution-demo-by-ravinder-kumar/ssssspmx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integration-by-substitution-demo-by-ravinder-kumar/ssssspmx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integration-by-substitution-demo-by-ravinder-kumar/ssssspmx"/>
      <lastmod>2026-11-01T21:35:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-element-d/ssssspmi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-element-d/ssssspmi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-element-d/ssssspmi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-element-d/ssssspmi"/>
      <lastmod>2026-11-01T20:47:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-element-d/ssssspmi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-element-d/ssssspmi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-element-d/ssssspmi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-element-d/ssssspmi"/>
      <lastmod>2026-11-01T20:47:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perspective-study-of-the-adoration-of-the-magi/ssssspmo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perspective-study-of-the-adoration-of-the-magi/ssssspmo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perspective-study-of-the-adoration-of-the-magi/ssssspmo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perspective-study-of-the-adoration-of-the-magi/ssssspmo"/>
      <lastmod>2026-11-02T17:38:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perspective-study-of-the-adoration-of-the-magi/ssssspmo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perspective-study-of-the-adoration-of-the-magi/ssssspmo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perspective-study-of-the-adoration-of-the-magi/ssssspmo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perspective-study-of-the-adoration-of-the-magi/ssssspmo"/>
      <lastmod>2026-11-02T17:38:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/open-middle-non-linear-correlation/ssssspjs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/open-middle-non-linear-correlation/ssssspjs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/open-middle-non-linear-correlation/ssssspjs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/open-middle-non-linear-correlation/ssssspjs"/>
      <lastmod>2026-11-01T19:15:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/open-middle-non-linear-correlation/ssssspjs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/open-middle-non-linear-correlation/ssssspjs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/open-middle-non-linear-correlation/ssssspjs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/open-middle-non-linear-correlation/ssssspjs"/>
      <lastmod>2026-11-01T19:15:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vertical-fitting/ssssspj7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-fitting/ssssspj7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-fitting/ssssspj7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-fitting/ssssspj7"/>
      <lastmod>2026-11-01T23:33:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vertical-fitting/ssssspj7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-fitting/ssssspj7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-fitting/ssssspj7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-fitting/ssssspj7"/>
      <lastmod>2026-11-01T23:33:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sir-model-by-ben-sparks/ssssspjn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sir-model-by-ben-sparks/ssssspjn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sir-model-by-ben-sparks/ssssspjn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sir-model-by-ben-sparks/ssssspjn"/>
      <lastmod>2026-11-01T19:02:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sir-model-by-ben-sparks/ssssspjn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sir-model-by-ben-sparks/ssssspjn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sir-model-by-ben-sparks/ssssspjn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sir-model-by-ben-sparks/ssssspjn"/>
      <lastmod>2026-11-01T19:02:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-dissection-geometry-and-linear-programming/ssssspj2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-dissection-geometry-and-linear-programming/ssssspj2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-dissection-geometry-and-linear-programming/ssssspj2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-dissection-geometry-and-linear-programming/ssssspj2"/>
      <lastmod>2026-11-02T00:36:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-dissection-geometry-and-linear-programming/ssssspj2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-dissection-geometry-and-linear-programming/ssssspj2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-dissection-geometry-and-linear-programming/ssssspj2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-dissection-geometry-and-linear-programming/ssssspj2"/>
      <lastmod>2026-11-02T00:36:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/importance-of-the-angle-in-sas-congruence-test/ssssspjk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/importance-of-the-angle-in-sas-congruence-test/ssssspjk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/importance-of-the-angle-in-sas-congruence-test/ssssspjk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/importance-of-the-angle-in-sas-congruence-test/ssssspjk"/>
      <lastmod>2026-11-01T19:14:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/importance-of-the-angle-in-sas-congruence-test/ssssspjk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/importance-of-the-angle-in-sas-congruence-test/ssssspjk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/importance-of-the-angle-in-sas-congruence-test/ssssspjk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/importance-of-the-angle-in-sas-congruence-test/ssssspjk"/>
      <lastmod>2026-11-01T19:14:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-commutativity-geometric-illustration/ssssspjz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-commutativity-geometric-illustration/ssssspjz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-commutativity-geometric-illustration/ssssspjz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-commutativity-geometric-illustration/ssssspjz"/>
      <lastmod>2026-11-02T17:51:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-commutativity-geometric-illustration/ssssspjz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-commutativity-geometric-illustration/ssssspjz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-commutativity-geometric-illustration/ssssspjz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-commutativity-geometric-illustration/ssssspjz"/>
      <lastmod>2026-11-02T17:51:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-lines-quick-intro/ssssspj0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-lines-quick-intro/ssssspj0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-lines-quick-intro/ssssspj0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-lines-quick-intro/ssssspj0"/>
      <lastmod>2026-11-01T21:31:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-lines-quick-intro/ssssspj0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-lines-quick-intro/ssssspj0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-lines-quick-intro/ssssspj0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-lines-quick-intro/ssssspj0"/>
      <lastmod>2026-11-01T21:31:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-a-linear-function/ssssspjd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-a-linear-function/ssssspjd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-a-linear-function/ssssspjd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-a-linear-function/ssssspjd"/>
      <lastmod>2026-11-02T12:34:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-of-a-linear-function/ssssspjd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-a-linear-function/ssssspjd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-a-linear-function/ssssspjd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-a-linear-function/ssssspjd"/>
      <lastmod>2026-11-02T12:34:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-sine-by-heather-pierce/ssssspjf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-sine-by-heather-pierce/ssssspjf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-sine-by-heather-pierce/ssssspjf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-sine-by-heather-pierce/ssssspjf"/>
      <lastmod>2026-11-02T16:35:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-of-sine-by-heather-pierce/ssssspjf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-sine-by-heather-pierce/ssssspjf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-sine-by-heather-pierce/ssssspjf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-sine-by-heather-pierce/ssssspjf"/>
      <lastmod>2026-11-02T16:35:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/viviani-s-theorem-dynamic-illustration/ssssspj8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/viviani-s-theorem-dynamic-illustration/ssssspj8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/viviani-s-theorem-dynamic-illustration/ssssspj8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/viviani-s-theorem-dynamic-illustration/ssssspj8"/>
      <lastmod>2026-11-02T17:48:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/viviani-s-theorem-dynamic-illustration/ssssspj8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/viviani-s-theorem-dynamic-illustration/ssssspj8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/viviani-s-theorem-dynamic-illustration/ssssspj8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/viviani-s-theorem-dynamic-illustration/ssssspj8"/>
      <lastmod>2026-11-02T17:48:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sas-theorem-geometric-construction-exercise-proving-triangle-congruence/ssssspju</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sas-theorem-geometric-construction-exercise-proving-triangle-congruence/ssssspju"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sas-theorem-geometric-construction-exercise-proving-triangle-congruence/ssssspju"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sas-theorem-geometric-construction-exercise-proving-triangle-congruence/ssssspju"/>
      <lastmod>2026-11-02T02:26:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sas-theorem-geometric-construction-exercise-proving-triangle-congruence/ssssspju</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sas-theorem-geometric-construction-exercise-proving-triangle-congruence/ssssspju"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sas-theorem-geometric-construction-exercise-proving-triangle-congruence/ssssspju"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sas-theorem-geometric-construction-exercise-proving-triangle-congruence/ssssspju"/>
      <lastmod>2026-11-02T02:26:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/deltoid-constellation-oscillation/ssssspj5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/deltoid-constellation-oscillation/ssssspj5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/deltoid-constellation-oscillation/ssssspj5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/deltoid-constellation-oscillation/ssssspj5"/>
      <lastmod>2026-11-02T12:06:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/deltoid-constellation-oscillation/ssssspj5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/deltoid-constellation-oscillation/ssssspj5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/deltoid-constellation-oscillation/ssssspj5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/deltoid-constellation-oscillation/ssssspj5"/>
      <lastmod>2026-11-02T12:06:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-construction-by-sam-chu/ssssspjb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-construction-by-sam-chu/ssssspjb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-construction-by-sam-chu/ssssspjb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-construction-by-sam-chu/ssssspjb"/>
      <lastmod>2026-11-02T03:16:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-construction-by-sam-chu/ssssspjb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-construction-by-sam-chu/ssssspjb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-construction-by-sam-chu/ssssspjb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-construction-by-sam-chu/ssssspjb"/>
      <lastmod>2026-11-02T03:16:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ec-1718-f6-intersections/ssssspj3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ec-1718-f6-intersections/ssssspj3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ec-1718-f6-intersections/ssssspj3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ec-1718-f6-intersections/ssssspj3"/>
      <lastmod>2026-11-02T18:02:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ec-1718-f6-intersections/ssssspj3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ec-1718-f6-intersections/ssssspj3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ec-1718-f6-intersections/ssssspj3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ec-1718-f6-intersections/ssssspj3"/>
      <lastmod>2026-11-02T18:02:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/super-rotations/ssssspjq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/super-rotations/ssssspjq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/super-rotations/ssssspjq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/super-rotations/ssssspjq"/>
      <lastmod>2026-11-02T09:40:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/super-rotations/ssssspjq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/super-rotations/ssssspjq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/super-rotations/ssssspjq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/super-rotations/ssssspjq"/>
      <lastmod>2026-11-02T09:40:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-exponential-functions-translations/ssssspj1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-exponential-functions-translations/ssssspj1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-exponential-functions-translations/ssssspj1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-exponential-functions-translations/ssssspj1"/>
      <lastmod>2026-11-02T18:18:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-exponential-functions-translations/ssssspj1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-exponential-functions-translations/ssssspj1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-exponential-functions-translations/ssssspj1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-exponential-functions-translations/ssssspj1"/>
      <lastmod>2026-11-02T18:18:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-triangle-trig-practice-finding-sides/ssssspjm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-trig-practice-finding-sides/ssssspjm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-trig-practice-finding-sides/ssssspjm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-trig-practice-finding-sides/ssssspjm"/>
      <lastmod>2026-11-01T20:53:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-triangle-trig-practice-finding-sides/ssssspjm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-trig-practice-finding-sides/ssssspjm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-trig-practice-finding-sides/ssssspjm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-trig-practice-finding-sides/ssssspjm"/>
      <lastmod>2026-11-01T20:53:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/numerical-integration-and-projectile-trajectories/ssssspjj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/numerical-integration-and-projectile-trajectories/ssssspjj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/numerical-integration-and-projectile-trajectories/ssssspjj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/numerical-integration-and-projectile-trajectories/ssssspjj"/>
      <lastmod>2026-11-01T21:50:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/numerical-integration-and-projectile-trajectories/ssssspjj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/numerical-integration-and-projectile-trajectories/ssssspjj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/numerical-integration-and-projectile-trajectories/ssssspjj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/numerical-integration-and-projectile-trajectories/ssssspjj"/>
      <lastmod>2026-11-01T21:50:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/julia-set-for-c-0-74543-0-11301i/ssssspjp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/julia-set-for-c-0-74543-0-11301i/ssssspjp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/julia-set-for-c-0-74543-0-11301i/ssssspjp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/julia-set-for-c-0-74543-0-11301i/ssssspjp"/>
      <lastmod>2026-11-01T21:09:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/julia-set-for-c-0-74543-0-11301i/ssssspjp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/julia-set-for-c-0-74543-0-11301i/ssssspjp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/julia-set-for-c-0-74543-0-11301i/ssssspjp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/julia-set-for-c-0-74543-0-11301i/ssssspjp"/>
      <lastmod>2026-11-01T21:09:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-polygon-construction-example/ssssspjw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-polygon-construction-example/ssssspjw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-polygon-construction-example/ssssspjw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-polygon-construction-example/ssssspjw"/>
      <lastmod>2026-11-01T21:14:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-polygon-construction-example/ssssspjw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-polygon-construction-example/ssssspjw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-polygon-construction-example/ssssspjw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-polygon-construction-example/ssssspjw"/>
      <lastmod>2026-11-01T21:14:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sss-congruence-in-geometry/ssssspj6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-congruence-in-geometry/ssssspj6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-congruence-in-geometry/ssssspj6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-congruence-in-geometry/ssssspj6"/>
      <lastmod>2026-11-02T16:56:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sss-congruence-in-geometry/ssssspj6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-congruence-in-geometry/ssssspj6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-congruence-in-geometry/ssssspj6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-congruence-in-geometry/ssssspj6"/>
      <lastmod>2026-11-02T16:56:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-functions-factored-form/ssssspjg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-functions-factored-form/ssssspjg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-functions-factored-form/ssssspjg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-functions-factored-form/ssssspjg"/>
      <lastmod>2026-11-02T00:34:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-functions-factored-form/ssssspjg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-functions-factored-form/ssssspjg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-functions-factored-form/ssssspjg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-functions-factored-form/ssssspjg"/>
      <lastmod>2026-11-02T00:34:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-triangle-and-altitudes/ssssspj9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-triangle-and-altitudes/ssssspj9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-triangle-and-altitudes/ssssspj9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-triangle-and-altitudes/ssssspj9"/>
      <lastmod>2026-11-02T18:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-triangle-and-altitudes/ssssspj9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-triangle-and-altitudes/ssssspj9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-triangle-and-altitudes/ssssspj9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-triangle-and-altitudes/ssssspj9"/>
      <lastmod>2026-11-02T18:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-notation-evaluate/ssssspje</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-notation-evaluate/ssssspje"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-notation-evaluate/ssssspje"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-notation-evaluate/ssssspje"/>
      <lastmod>2026-11-02T03:14:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-notation-evaluate/ssssspje</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-notation-evaluate/ssssspje"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-notation-evaluate/ssssspje"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-notation-evaluate/ssssspje"/>
      <lastmod>2026-11-02T03:14:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/catriona-shearer-s-parallelogram-puzzle/ssssspjv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/catriona-shearer-s-parallelogram-puzzle/ssssspjv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/catriona-shearer-s-parallelogram-puzzle/ssssspjv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/catriona-shearer-s-parallelogram-puzzle/ssssspjv"/>
      <lastmod>2026-11-02T00:06:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/catriona-shearer-s-parallelogram-puzzle/ssssspjv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/catriona-shearer-s-parallelogram-puzzle/ssssspjv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/catriona-shearer-s-parallelogram-puzzle/ssssspjv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/catriona-shearer-s-parallelogram-puzzle/ssssspjv"/>
      <lastmod>2026-11-02T00:06:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/special-right-triangles-by-dane-ehlert/ssssspj4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-right-triangles-by-dane-ehlert/ssssspj4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-right-triangles-by-dane-ehlert/ssssspj4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-right-triangles-by-dane-ehlert/ssssspj4"/>
      <lastmod>2026-11-02T18:13:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/special-right-triangles-by-dane-ehlert/ssssspj4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-right-triangles-by-dane-ehlert/ssssspj4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-right-triangles-by-dane-ehlert/ssssspj4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-right-triangles-by-dane-ehlert/ssssspj4"/>
      <lastmod>2026-11-02T18:13:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/disk-washer-method-for-volume-of-solid-of-revolution/ssssspjl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/disk-washer-method-for-volume-of-solid-of-revolution/ssssspjl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/disk-washer-method-for-volume-of-solid-of-revolution/ssssspjl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/disk-washer-method-for-volume-of-solid-of-revolution/ssssspjl"/>
      <lastmod>2026-11-01T19:34:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/disk-washer-method-for-volume-of-solid-of-revolution/ssssspjl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/disk-washer-method-for-volume-of-solid-of-revolution/ssssspjl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/disk-washer-method-for-volume-of-solid-of-revolution/ssssspjl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/disk-washer-method-for-volume-of-solid-of-revolution/ssssspjl"/>
      <lastmod>2026-11-01T19:34:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-revolution-3/ssssspjy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-3/ssssspjy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-3/ssssspjy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-3/ssssspjy"/>
      <lastmod>2026-11-02T17:11:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-revolution-3/ssssspjy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-3/ssssspjy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-3/ssssspjy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-3/ssssspjy"/>
      <lastmod>2026-11-02T17:11:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotations-tool-interactive-polygon-rotation-around-a-point/ssssspja</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotations-tool-interactive-polygon-rotation-around-a-point/ssssspja"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotations-tool-interactive-polygon-rotation-around-a-point/ssssspja"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotations-tool-interactive-polygon-rotation-around-a-point/ssssspja"/>
      <lastmod>2026-11-02T07:33:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotations-tool-interactive-polygon-rotation-around-a-point/ssssspja</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotations-tool-interactive-polygon-rotation-around-a-point/ssssspja"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotations-tool-interactive-polygon-rotation-around-a-point/ssssspja"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotations-tool-interactive-polygon-rotation-around-a-point/ssssspja"/>
      <lastmod>2026-11-02T07:33:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-and-locus-in-a-right-triangle/ssssspjc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-locus-in-a-right-triangle/ssssspjc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-locus-in-a-right-triangle/ssssspjc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-locus-in-a-right-triangle/ssssspjc"/>
      <lastmod>2026-11-02T10:46:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-and-locus-in-a-right-triangle/ssssspjc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-locus-in-a-right-triangle/ssssspjc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-locus-in-a-right-triangle/ssssspjc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-locus-in-a-right-triangle/ssssspjc"/>
      <lastmod>2026-11-02T10:46:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rounding-on-a-number-line/ssssspjr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rounding-on-a-number-line/ssssspjr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rounding-on-a-number-line/ssssspjr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rounding-on-a-number-line/ssssspjr"/>
      <lastmod>2026-11-02T11:56:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rounding-on-a-number-line/ssssspjr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rounding-on-a-number-line/ssssspjr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rounding-on-a-number-line/ssssspjr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rounding-on-a-number-line/ssssspjr"/>
      <lastmod>2026-11-02T11:56:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-and-subtracting-positive-and-negative-integers-by-tmoorehead/ssssspjh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-and-subtracting-positive-and-negative-integers-by-tmoorehead/ssssspjh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-and-subtracting-positive-and-negative-integers-by-tmoorehead/ssssspjh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-and-subtracting-positive-and-negative-integers-by-tmoorehead/ssssspjh"/>
      <lastmod>2026-11-02T18:50:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-and-subtracting-positive-and-negative-integers-by-tmoorehead/ssssspjh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-and-subtracting-positive-and-negative-integers-by-tmoorehead/ssssspjh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-and-subtracting-positive-and-negative-integers-by-tmoorehead/ssssspjh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-and-subtracting-positive-and-negative-integers-by-tmoorehead/ssssspjh"/>
      <lastmod>2026-11-02T18:50:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-parabolas-in-standard-form-using-factored-form/ssssspjt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-parabolas-in-standard-form-using-factored-form/ssssspjt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-parabolas-in-standard-form-using-factored-form/ssssspjt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-parabolas-in-standard-form-using-factored-form/ssssspjt"/>
      <lastmod>2026-11-01T23:52:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-parabolas-in-standard-form-using-factored-form/ssssspjt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-parabolas-in-standard-form-using-factored-form/ssssspjt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-parabolas-in-standard-form-using-factored-form/ssssspjt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-parabolas-in-standard-form-using-factored-form/ssssspjt"/>
      <lastmod>2026-11-01T23:52:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-and-function-intersection-in-3d/ssssspjx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-and-function-intersection-in-3d/ssssspjx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-and-function-intersection-in-3d/ssssspjx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-and-function-intersection-in-3d/ssssspjx"/>
      <lastmod>2026-11-02T12:04:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-and-function-intersection-in-3d/ssssspjx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-and-function-intersection-in-3d/ssssspjx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-and-function-intersection-in-3d/ssssspjx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-and-function-intersection-in-3d/ssssspjx"/>
      <lastmod>2026-11-02T12:04:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/skeletal-octahedron-folding-animation/ssssspji</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/skeletal-octahedron-folding-animation/ssssspji"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/skeletal-octahedron-folding-animation/ssssspji"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/skeletal-octahedron-folding-animation/ssssspji"/>
      <lastmod>2026-11-01T20:35:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/skeletal-octahedron-folding-animation/ssssspji</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/skeletal-octahedron-folding-animation/ssssspji"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/skeletal-octahedron-folding-animation/ssssspji"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/skeletal-octahedron-folding-animation/ssssspji"/>
      <lastmod>2026-11-01T20:35:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plotting-points-on-a-graph/ssssspjo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-points-on-a-graph/ssssspjo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-points-on-a-graph/ssssspjo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-points-on-a-graph/ssssspjo"/>
      <lastmod>2026-11-01T19:01:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plotting-points-on-a-graph/ssssspjo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-points-on-a-graph/ssssspjo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-points-on-a-graph/ssssspjo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-points-on-a-graph/ssssspjo"/>
      <lastmod>2026-11-01T19:01:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-template/ssssspps</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-template/ssssspps"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-template/ssssspps"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-template/ssssspps"/>
      <lastmod>2026-11-01T23:16:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-template/ssssspps</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-template/ssssspps"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-template/ssssspps"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-template/ssssspps"/>
      <lastmod>2026-11-01T23:16:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angles-and-vertices/ssssspp7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-and-vertices/ssssspp7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-and-vertices/ssssspp7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-and-vertices/ssssspp7"/>
      <lastmod>2026-11-02T09:18:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angles-and-vertices/ssssspp7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-and-vertices/ssssspp7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-and-vertices/ssssspp7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-and-vertices/ssssspp7"/>
      <lastmod>2026-11-02T09:18:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prism-dispersion-refraction-and-separation-of-light-through-a-triangular-prism/sssssppn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-dispersion-refraction-and-separation-of-light-through-a-triangular-prism/sssssppn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-dispersion-refraction-and-separation-of-light-through-a-triangular-prism/sssssppn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-dispersion-refraction-and-separation-of-light-through-a-triangular-prism/sssssppn"/>
      <lastmod>2026-11-01T21:18:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prism-dispersion-refraction-and-separation-of-light-through-a-triangular-prism/sssssppn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-dispersion-refraction-and-separation-of-light-through-a-triangular-prism/sssssppn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-dispersion-refraction-and-separation-of-light-through-a-triangular-prism/sssssppn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-dispersion-refraction-and-separation-of-light-through-a-triangular-prism/sssssppn"/>
      <lastmod>2026-11-01T21:18:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ab-trig-formulas-on-an-ipad-drop-straight-down/ssssspp2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ab-trig-formulas-on-an-ipad-drop-straight-down/ssssspp2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ab-trig-formulas-on-an-ipad-drop-straight-down/ssssspp2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ab-trig-formulas-on-an-ipad-drop-straight-down/ssssspp2"/>
      <lastmod>2026-11-02T18:42:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ab-trig-formulas-on-an-ipad-drop-straight-down/ssssspp2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ab-trig-formulas-on-an-ipad-drop-straight-down/ssssspp2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ab-trig-formulas-on-an-ipad-drop-straight-down/ssssspp2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ab-trig-formulas-on-an-ipad-drop-straight-down/ssssspp2"/>
      <lastmod>2026-11-02T18:42:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/law-of-cosine-what-is-the-excess/sssssppk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-cosine-what-is-the-excess/sssssppk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-cosine-what-is-the-excess/sssssppk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-cosine-what-is-the-excess/sssssppk"/>
      <lastmod>2026-11-01T19:29:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/law-of-cosine-what-is-the-excess/sssssppk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-cosine-what-is-the-excess/sssssppk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-cosine-what-is-the-excess/sssssppk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-cosine-what-is-the-excess/sssssppk"/>
      <lastmod>2026-11-01T19:29:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-hexagonal-prism/sssssppz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-hexagonal-prism/sssssppz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-hexagonal-prism/sssssppz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-hexagonal-prism/sssssppz"/>
      <lastmod>2026-11-02T02:52:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-a-hexagonal-prism/sssssppz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-hexagonal-prism/sssssppz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-hexagonal-prism/sssssppz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-hexagonal-prism/sssssppz"/>
      <lastmod>2026-11-02T02:52:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-activity-polygon-and-vector-transformation/ssssspp0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-activity-polygon-and-vector-transformation/ssssspp0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-activity-polygon-and-vector-transformation/ssssspp0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-activity-polygon-and-vector-transformation/ssssspp0"/>
      <lastmod>2026-11-02T18:58:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-activity-polygon-and-vector-transformation/ssssspp0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-activity-polygon-and-vector-transformation/ssssspp0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-activity-polygon-and-vector-transformation/ssssspp0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-activity-polygon-and-vector-transformation/ssssspp0"/>
      <lastmod>2026-11-02T18:58:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-root-finder/sssssppd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-root-finder/sssssppd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-root-finder/sssssppd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-root-finder/sssssppd"/>
      <lastmod>2026-11-02T02:46:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-root-finder/sssssppd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-root-finder/sssssppd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-root-finder/sssssppd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-root-finder/sssssppd"/>
      <lastmod>2026-11-02T02:46:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-of-revolution-washer-1-1/sssssppf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-washer-1-1/sssssppf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-washer-1-1/sssssppf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-washer-1-1/sssssppf"/>
      <lastmod>2026-11-02T18:52:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-of-revolution-washer-1-1/sssssppf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-washer-1-1/sssssppf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-washer-1-1/sssssppf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-washer-1-1/sssssppf"/>
      <lastmod>2026-11-02T18:52:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadrilateral-construction-templates/ssssspp8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-construction-templates/ssssspp8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-construction-templates/ssssspp8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-construction-templates/ssssspp8"/>
      <lastmod>2026-11-02T16:48:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadrilateral-construction-templates/ssssspp8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-construction-templates/ssssspp8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-construction-templates/ssssspp8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-construction-templates/ssssspp8"/>
      <lastmod>2026-11-02T16:48:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arithmetic-sequence-practice-by-nnhsmath/sssssppu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-practice-by-nnhsmath/sssssppu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-sequence-practice-by-nnhsmath/sssssppu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-practice-by-nnhsmath/sssssppu"/>
      <lastmod>2026-11-02T17:59:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arithmetic-sequence-practice-by-nnhsmath/sssssppu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-practice-by-nnhsmath/sssssppu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-sequence-practice-by-nnhsmath/sssssppu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-practice-by-nnhsmath/sssssppu"/>
      <lastmod>2026-11-02T17:59:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/approximating-a-definite-integral/ssssspp5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/approximating-a-definite-integral/ssssspp5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/approximating-a-definite-integral/ssssspp5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/approximating-a-definite-integral/ssssspp5"/>
      <lastmod>2026-11-02T00:44:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/approximating-a-definite-integral/ssssspp5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/approximating-a-definite-integral/ssssspp5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/approximating-a-definite-integral/ssssspp5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/approximating-a-definite-integral/ssssspp5"/>
      <lastmod>2026-11-02T00:44:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/truncated-dodecahedron-by-chris-cambr/sssssppb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-dodecahedron-by-chris-cambr/sssssppb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-dodecahedron-by-chris-cambr/sssssppb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-dodecahedron-by-chris-cambr/sssssppb"/>
      <lastmod>2026-11-02T13:05:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/truncated-dodecahedron-by-chris-cambr/sssssppb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-dodecahedron-by-chris-cambr/sssssppb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-dodecahedron-by-chris-cambr/sssssppb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-dodecahedron-by-chris-cambr/sssssppb"/>
      <lastmod>2026-11-02T13:05:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kinematics-s-t-v-t-a-t-relationship-demo/ssssspp3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kinematics-s-t-v-t-a-t-relationship-demo/ssssspp3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kinematics-s-t-v-t-a-t-relationship-demo/ssssspp3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kinematics-s-t-v-t-a-t-relationship-demo/ssssspp3"/>
      <lastmod>2026-11-01T23:34:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kinematics-s-t-v-t-a-t-relationship-demo/ssssspp3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kinematics-s-t-v-t-a-t-relationship-demo/ssssspp3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kinematics-s-t-v-t-a-t-relationship-demo/ssssspp3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kinematics-s-t-v-t-a-t-relationship-demo/ssssspp3"/>
      <lastmod>2026-11-01T23:34:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/basis-vectors-linear-combinations-span-and-linear-independence-dependence/sssssppq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basis-vectors-linear-combinations-span-and-linear-independence-dependence/sssssppq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basis-vectors-linear-combinations-span-and-linear-independence-dependence/sssssppq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basis-vectors-linear-combinations-span-and-linear-independence-dependence/sssssppq"/>
      <lastmod>2026-11-02T00:44:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/basis-vectors-linear-combinations-span-and-linear-independence-dependence/sssssppq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basis-vectors-linear-combinations-span-and-linear-independence-dependence/sssssppq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basis-vectors-linear-combinations-span-and-linear-independence-dependence/sssssppq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basis-vectors-linear-combinations-span-and-linear-independence-dependence/sssssppq"/>
      <lastmod>2026-11-02T00:44:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graph-scaling-transformation/ssssspp1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-scaling-transformation/ssssspp1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-scaling-transformation/ssssspp1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-scaling-transformation/ssssspp1"/>
      <lastmod>2026-11-02T17:48:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graph-scaling-transformation/ssssspp1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-scaling-transformation/ssssspp1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-scaling-transformation/ssssspp1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-scaling-transformation/ssssspp1"/>
      <lastmod>2026-11-02T17:48:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-of-revolution-example-1/sssssppm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-example-1/sssssppm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-example-1/sssssppm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-example-1/sssssppm"/>
      <lastmod>2026-11-01T23:44:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-of-revolution-example-1/sssssppm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-example-1/sssssppm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-example-1/sssssppm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-example-1/sssssppm"/>
      <lastmod>2026-11-01T23:44:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/draw-lines-of-symmetry-exploring-mirror-symmetry-in-polygons/sssssppj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-lines-of-symmetry-exploring-mirror-symmetry-in-polygons/sssssppj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-lines-of-symmetry-exploring-mirror-symmetry-in-polygons/sssssppj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-lines-of-symmetry-exploring-mirror-symmetry-in-polygons/sssssppj"/>
      <lastmod>2026-11-02T09:49:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/draw-lines-of-symmetry-exploring-mirror-symmetry-in-polygons/sssssppj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-lines-of-symmetry-exploring-mirror-symmetry-in-polygons/sssssppj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-lines-of-symmetry-exploring-mirror-symmetry-in-polygons/sssssppj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-lines-of-symmetry-exploring-mirror-symmetry-in-polygons/sssssppj"/>
      <lastmod>2026-11-02T09:49:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/thermometer-positive-and-negative-numbers/sssssppp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/thermometer-positive-and-negative-numbers/sssssppp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/thermometer-positive-and-negative-numbers/sssssppp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/thermometer-positive-and-negative-numbers/sssssppp"/>
      <lastmod>2026-11-02T10:49:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/thermometer-positive-and-negative-numbers/sssssppp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/thermometer-positive-and-negative-numbers/sssssppp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/thermometer-positive-and-negative-numbers/sssssppp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/thermometer-positive-and-negative-numbers/sssssppp"/>
      <lastmod>2026-11-02T10:49:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/like-terms-grouping/sssssppw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/like-terms-grouping/sssssppw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/like-terms-grouping/sssssppw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/like-terms-grouping/sssssppw"/>
      <lastmod>2026-11-02T12:56:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/like-terms-grouping/sssssppw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/like-terms-grouping/sssssppw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/like-terms-grouping/sssssppw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/like-terms-grouping/sssssppw"/>
      <lastmod>2026-11-02T12:56:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/subtracting-mixed-numbers-interactive-demo-bilingual-en-ar/ssssspp6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtracting-mixed-numbers-interactive-demo-bilingual-en-ar/ssssspp6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtracting-mixed-numbers-interactive-demo-bilingual-en-ar/ssssspp6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtracting-mixed-numbers-interactive-demo-bilingual-en-ar/ssssspp6"/>
      <lastmod>2026-11-02T18:58:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/subtracting-mixed-numbers-interactive-demo-bilingual-en-ar/ssssspp6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtracting-mixed-numbers-interactive-demo-bilingual-en-ar/ssssspp6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtracting-mixed-numbers-interactive-demo-bilingual-en-ar/ssssspp6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtracting-mixed-numbers-interactive-demo-bilingual-en-ar/ssssspp6"/>
      <lastmod>2026-11-02T18:58:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-a-wine-glass/sssssppg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-wine-glass/sssssppg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-wine-glass/sssssppg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-wine-glass/sssssppg"/>
      <lastmod>2026-11-01T23:55:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-a-wine-glass/sssssppg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-wine-glass/sssssppg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-wine-glass/sssssppg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-wine-glass/sssssppg"/>
      <lastmod>2026-11-01T23:55:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-and-triangle-relationship-animation/ssssspp9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-triangle-relationship-animation/ssssspp9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-triangle-relationship-animation/ssssspp9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-triangle-relationship-animation/ssssspp9"/>
      <lastmod>2026-11-02T13:14:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-and-triangle-relationship-animation/ssssspp9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-triangle-relationship-animation/ssssspp9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-triangle-relationship-animation/ssssspp9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-triangle-relationship-animation/ssssspp9"/>
      <lastmod>2026-11-02T13:14:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/different-prices-function-graphs-and-expected-value-comparison/sssssppe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/different-prices-function-graphs-and-expected-value-comparison/sssssppe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/different-prices-function-graphs-and-expected-value-comparison/sssssppe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/different-prices-function-graphs-and-expected-value-comparison/sssssppe"/>
      <lastmod>2026-11-02T18:54:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/different-prices-function-graphs-and-expected-value-comparison/sssssppe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/different-prices-function-graphs-and-expected-value-comparison/sssssppe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/different-prices-function-graphs-and-expected-value-comparison/sssssppe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/different-prices-function-graphs-and-expected-value-comparison/sssssppe"/>
      <lastmod>2026-11-02T18:54:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-cubic-equation-roots/sssssppv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-cubic-equation-roots/sssssppv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-cubic-equation-roots/sssssppv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-cubic-equation-roots/sssssppv"/>
      <lastmod>2026-11-01T19:30:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-cubic-equation-roots/sssssppv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-cubic-equation-roots/sssssppv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-cubic-equation-roots/sssssppv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-cubic-equation-roots/sssssppv"/>
      <lastmod>2026-11-01T19:30:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dr-fisher-s-exponents-game-level-1/ssssspp4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dr-fisher-s-exponents-game-level-1/ssssspp4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dr-fisher-s-exponents-game-level-1/ssssspp4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dr-fisher-s-exponents-game-level-1/ssssspp4"/>
      <lastmod>2026-11-01T21:05:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dr-fisher-s-exponents-game-level-1/ssssspp4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dr-fisher-s-exponents-game-level-1/ssssspp4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dr-fisher-s-exponents-game-level-1/ssssspp4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dr-fisher-s-exponents-game-level-1/ssssspp4"/>
      <lastmod>2026-11-01T21:05:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/when-are-they-the-same-im-8-4-9-linear-comparison-lesson/sssssppl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/when-are-they-the-same-im-8-4-9-linear-comparison-lesson/sssssppl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/when-are-they-the-same-im-8-4-9-linear-comparison-lesson/sssssppl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/when-are-they-the-same-im-8-4-9-linear-comparison-lesson/sssssppl"/>
      <lastmod>2026-11-01T20:22:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/when-are-they-the-same-im-8-4-9-linear-comparison-lesson/sssssppl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/when-are-they-the-same-im-8-4-9-linear-comparison-lesson/sssssppl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/when-are-they-the-same-im-8-4-9-linear-comparison-lesson/sssssppl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/when-are-they-the-same-im-8-4-9-linear-comparison-lesson/sssssppl"/>
      <lastmod>2026-11-01T20:22:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-function-graphs-anatomy-and-investigation-by-dr-sedaghatjou/sssssppy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-function-graphs-anatomy-and-investigation-by-dr-sedaghatjou/sssssppy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-function-graphs-anatomy-and-investigation-by-dr-sedaghatjou/sssssppy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-function-graphs-anatomy-and-investigation-by-dr-sedaghatjou/sssssppy"/>
      <lastmod>2026-11-01T21:40:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-function-graphs-anatomy-and-investigation-by-dr-sedaghatjou/sssssppy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-function-graphs-anatomy-and-investigation-by-dr-sedaghatjou/sssssppy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-function-graphs-anatomy-and-investigation-by-dr-sedaghatjou/sssssppy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-function-graphs-anatomy-and-investigation-by-dr-sedaghatjou/sssssppy"/>
      <lastmod>2026-11-01T21:40:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-plane-transformations-mapping-a-line/sssssppa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-plane-transformations-mapping-a-line/sssssppa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-plane-transformations-mapping-a-line/sssssppa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-plane-transformations-mapping-a-line/sssssppa"/>
      <lastmod>2026-11-02T16:44:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-plane-transformations-mapping-a-line/sssssppa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-plane-transformations-mapping-a-line/sssssppa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-plane-transformations-mapping-a-line/sssssppa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-plane-transformations-mapping-a-line/sssssppa"/>
      <lastmod>2026-11-02T16:44:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-inequalities-in-a-triangle-applet/sssssppc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-inequalities-in-a-triangle-applet/sssssppc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-inequalities-in-a-triangle-applet/sssssppc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-inequalities-in-a-triangle-applet/sssssppc"/>
      <lastmod>2026-11-02T09:02:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-inequalities-in-a-triangle-applet/sssssppc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-inequalities-in-a-triangle-applet/sssssppc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-inequalities-in-a-triangle-applet/sssssppc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-inequalities-in-a-triangle-applet/sssssppc"/>
      <lastmod>2026-11-02T09:02:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/basic-concept-of-function/sssssppr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-concept-of-function/sssssppr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-concept-of-function/sssssppr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-concept-of-function/sssssppr"/>
      <lastmod>2026-11-01T20:46:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/basic-concept-of-function/sssssppr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-concept-of-function/sssssppr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-concept-of-function/sssssppr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-concept-of-function/sssssppr"/>
      <lastmod>2026-11-01T20:46:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/segment-addition-postulate-problem-2/ssssspph</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-problem-2/ssssspph"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/segment-addition-postulate-problem-2/ssssspph"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-problem-2/ssssspph"/>
      <lastmod>2026-11-02T00:47:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/segment-addition-postulate-problem-2/ssssspph</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-problem-2/ssssspph"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/segment-addition-postulate-problem-2/ssssspph"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-problem-2/ssssspph"/>
      <lastmod>2026-11-02T00:47:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-interpretation-of-trig-ratios/sssssppt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-interpretation-of-trig-ratios/sssssppt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-interpretation-of-trig-ratios/sssssppt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-interpretation-of-trig-ratios/sssssppt"/>
      <lastmod>2026-11-02T18:47:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-interpretation-of-trig-ratios/sssssppt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-interpretation-of-trig-ratios/sssssppt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-interpretation-of-trig-ratios/sssssppt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-interpretation-of-trig-ratios/sssssppt"/>
      <lastmod>2026-11-02T18:47:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/book-graph-horizontal-or-vertical-line/sssssppx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/book-graph-horizontal-or-vertical-line/sssssppx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/book-graph-horizontal-or-vertical-line/sssssppx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/book-graph-horizontal-or-vertical-line/sssssppx"/>
      <lastmod>2026-11-02T00:26:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/book-graph-horizontal-or-vertical-line/sssssppx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/book-graph-horizontal-or-vertical-line/sssssppx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/book-graph-horizontal-or-vertical-line/sssssppx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/book-graph-horizontal-or-vertical-line/sssssppx"/>
      <lastmod>2026-11-02T00:26:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-with-net/sssssppi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-with-net/sssssppi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-with-net/sssssppi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-with-net/sssssppi"/>
      <lastmod>2026-11-02T18:05:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-with-net/sssssppi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-with-net/sssssppi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-with-net/sssssppi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-with-net/sssssppi"/>
      <lastmod>2026-11-02T18:05:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/icosahedron-as-a-planar-graph-visualization/sssssppo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/icosahedron-as-a-planar-graph-visualization/sssssppo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/icosahedron-as-a-planar-graph-visualization/sssssppo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/icosahedron-as-a-planar-graph-visualization/sssssppo"/>
      <lastmod>2026-11-02T18:44:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/icosahedron-as-a-planar-graph-visualization/sssssppo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/icosahedron-as-a-planar-graph-visualization/sssssppo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/icosahedron-as-a-planar-graph-visualization/sssssppo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/icosahedron-as-a-planar-graph-visualization/sssssppo"/>
      <lastmod>2026-11-02T18:44:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/galton-board-binomial-distribution/ssssspws</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/galton-board-binomial-distribution/ssssspws"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/galton-board-binomial-distribution/ssssspws"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/galton-board-binomial-distribution/ssssspws"/>
      <lastmod>2026-11-02T12:00:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/galton-board-binomial-distribution/ssssspws</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/galton-board-binomial-distribution/ssssspws"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/galton-board-binomial-distribution/ssssspws"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/galton-board-binomial-distribution/ssssspws"/>
      <lastmod>2026-11-02T12:00:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-equation-optimization-example/ssssspw7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equation-optimization-example/ssssspw7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equation-optimization-example/ssssspw7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equation-optimization-example/ssssspw7"/>
      <lastmod>2026-11-02T18:04:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-equation-optimization-example/ssssspw7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equation-optimization-example/ssssspw7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equation-optimization-example/ssssspw7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equation-optimization-example/ssssspw7"/>
      <lastmod>2026-11-02T18:04:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-proof-of-multiplication-rule/ssssspwn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-proof-of-multiplication-rule/ssssspwn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-proof-of-multiplication-rule/ssssspwn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-proof-of-multiplication-rule/ssssspwn"/>
      <lastmod>2026-11-02T17:37:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-proof-of-multiplication-rule/ssssspwn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-proof-of-multiplication-rule/ssssspwn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-proof-of-multiplication-rule/ssssspwn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-proof-of-multiplication-rule/ssssspwn"/>
      <lastmod>2026-11-02T17:37:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-transformation-by-breanna-mireles/ssssspw2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-transformation-by-breanna-mireles/ssssspw2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-transformation-by-breanna-mireles/ssssspw2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-transformation-by-breanna-mireles/ssssspw2"/>
      <lastmod>2026-11-02T18:50:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-transformation-by-breanna-mireles/ssssspw2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-transformation-by-breanna-mireles/ssssspw2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-transformation-by-breanna-mireles/ssssspw2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-transformation-by-breanna-mireles/ssssspw2"/>
      <lastmod>2026-11-02T18:50:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mean-donation-confidence-interval-tdistribution/ssssspwk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mean-donation-confidence-interval-tdistribution/ssssspwk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mean-donation-confidence-interval-tdistribution/ssssspwk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mean-donation-confidence-interval-tdistribution/ssssspwk"/>
      <lastmod>2026-11-01T21:13:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mean-donation-confidence-interval-tdistribution/ssssspwk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mean-donation-confidence-interval-tdistribution/ssssspwk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mean-donation-confidence-interval-tdistribution/ssssspwk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mean-donation-confidence-interval-tdistribution/ssssspwk"/>
      <lastmod>2026-11-01T21:13:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-logarithmic-function/ssssspwz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-logarithmic-function/ssssspwz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-logarithmic-function/ssssspwz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-logarithmic-function/ssssspwz"/>
      <lastmod>2026-11-01T23:40:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-of-logarithmic-function/ssssspwz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-logarithmic-function/ssssspwz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-logarithmic-function/ssssspwz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-logarithmic-function/ssssspwz"/>
      <lastmod>2026-11-01T23:40:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polynomial-long-division-demonstration/ssssspw0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-long-division-demonstration/ssssspw0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-long-division-demonstration/ssssspw0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-long-division-demonstration/ssssspw0"/>
      <lastmod>2026-11-02T16:53:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polynomial-long-division-demonstration/ssssspw0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-long-division-demonstration/ssssspw0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-long-division-demonstration/ssssspw0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-long-division-demonstration/ssssspw0"/>
      <lastmod>2026-11-02T16:53:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-random-process-and-geometry-interaction-demo/ssssspwd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-random-process-and-geometry-interaction-demo/ssssspwd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-random-process-and-geometry-interaction-demo/ssssspwd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-random-process-and-geometry-interaction-demo/ssssspwd"/>
      <lastmod>2026-11-02T18:07:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-random-process-and-geometry-interaction-demo/ssssspwd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-random-process-and-geometry-interaction-demo/ssssspwd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-random-process-and-geometry-interaction-demo/ssssspwd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-random-process-and-geometry-interaction-demo/ssssspwd"/>
      <lastmod>2026-11-02T18:07:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-without-words-volume-of-a-pyramid/ssssspwf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-without-words-volume-of-a-pyramid/ssssspwf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-without-words-volume-of-a-pyramid/ssssspwf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-without-words-volume-of-a-pyramid/ssssspwf"/>
      <lastmod>2026-11-01T21:04:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-without-words-volume-of-a-pyramid/ssssspwf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-without-words-volume-of-a-pyramid/ssssspwf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-without-words-volume-of-a-pyramid/ssssspwf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-without-words-volume-of-a-pyramid/ssssspwf"/>
      <lastmod>2026-11-01T21:04:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/matrices-algebraic-operations/ssssspw8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrices-algebraic-operations/ssssspw8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrices-algebraic-operations/ssssspw8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrices-algebraic-operations/ssssspw8"/>
      <lastmod>2026-11-02T17:40:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/matrices-algebraic-operations/ssssspw8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrices-algebraic-operations/ssssspw8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrices-algebraic-operations/ssssspw8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrices-algebraic-operations/ssssspw8"/>
      <lastmod>2026-11-02T17:40:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-and-surface-area-of-a-cuboid/ssssspwu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-and-surface-area-of-a-cuboid/ssssspwu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-and-surface-area-of-a-cuboid/ssssspwu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-and-surface-area-of-a-cuboid/ssssspwu"/>
      <lastmod>2026-11-02T18:21:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-and-surface-area-of-a-cuboid/ssssspwu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-and-surface-area-of-a-cuboid/ssssspwu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-and-surface-area-of-a-cuboid/ssssspwu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-and-surface-area-of-a-cuboid/ssssspwu"/>
      <lastmod>2026-11-02T18:21:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-a-circle-by-mercheid4788/ssssspw5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-circle-by-mercheid4788/ssssspw5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-circle-by-mercheid4788/ssssspw5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-circle-by-mercheid4788/ssssspw5"/>
      <lastmod>2026-11-02T00:26:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-a-circle-by-mercheid4788/ssssspw5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-circle-by-mercheid4788/ssssspw5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-circle-by-mercheid4788/ssssspw5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-circle-by-mercheid4788/ssssspw5"/>
      <lastmod>2026-11-02T00:26:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygons-circles-rotational-construction/ssssspwb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygons-circles-rotational-construction/ssssspwb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygons-circles-rotational-construction/ssssspwb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygons-circles-rotational-construction/ssssspwb"/>
      <lastmod>2026-11-01T21:45:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygons-circles-rotational-construction/ssssspwb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygons-circles-rotational-construction/ssssspwb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygons-circles-rotational-construction/ssssspwb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygons-circles-rotational-construction/ssssspwb"/>
      <lastmod>2026-11-01T21:45:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wave-evolution-on-a-string/ssssspw3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wave-evolution-on-a-string/ssssspw3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wave-evolution-on-a-string/ssssspw3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wave-evolution-on-a-string/ssssspw3"/>
      <lastmod>2026-11-01T23:23:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wave-evolution-on-a-string/ssssspw3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wave-evolution-on-a-string/ssssspw3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wave-evolution-on-a-string/ssssspw3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wave-evolution-on-a-string/ssssspw3"/>
      <lastmod>2026-11-01T23:23:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-at-the-center/ssssspwq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-at-the-center/ssssspwq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-at-the-center/ssssspwq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-at-the-center/ssssspwq"/>
      <lastmod>2026-11-02T18:24:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-at-the-center/ssssspwq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-at-the-center/ssssspwq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-at-the-center/ssssspwq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-at-the-center/ssssspwq"/>
      <lastmod>2026-11-02T18:24:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-and-power-function-scatter-plot-analysis/ssssspw1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-and-power-function-scatter-plot-analysis/ssssspw1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-and-power-function-scatter-plot-analysis/ssssspw1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-and-power-function-scatter-plot-analysis/ssssspw1"/>
      <lastmod>2026-11-01T23:57:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-and-power-function-scatter-plot-analysis/ssssspw1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-and-power-function-scatter-plot-analysis/ssssspw1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-and-power-function-scatter-plot-analysis/ssssspw1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-and-power-function-scatter-plot-analysis/ssssspw1"/>
      <lastmod>2026-11-01T23:57:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-and-integral-calculation-of-a-ball-passing-through-a-triangle/ssssspwm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-and-integral-calculation-of-a-ball-passing-through-a-triangle/ssssspwm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-and-integral-calculation-of-a-ball-passing-through-a-triangle/ssssspwm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-and-integral-calculation-of-a-ball-passing-through-a-triangle/ssssspwm"/>
      <lastmod>2026-11-01T21:34:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-and-integral-calculation-of-a-ball-passing-through-a-triangle/ssssspwm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-and-integral-calculation-of-a-ball-passing-through-a-triangle/ssssspwm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-and-integral-calculation-of-a-ball-passing-through-a-triangle/ssssspwm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-and-integral-calculation-of-a-ball-passing-through-a-triangle/ssssspwm"/>
      <lastmod>2026-11-01T21:34:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilations-find-the-center-and-scale-factor/ssssspwj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-find-the-center-and-scale-factor/ssssspwj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-find-the-center-and-scale-factor/ssssspwj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-find-the-center-and-scale-factor/ssssspwj"/>
      <lastmod>2026-11-02T18:45:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilations-find-the-center-and-scale-factor/ssssspwj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-find-the-center-and-scale-factor/ssssspwj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-find-the-center-and-scale-factor/ssssspwj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-find-the-center-and-scale-factor/ssssspwj"/>
      <lastmod>2026-11-02T18:45:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-quadratic-function-graphing/ssssspwp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-quadratic-function-graphing/ssssspwp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-quadratic-function-graphing/ssssspwp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-quadratic-function-graphing/ssssspwp"/>
      <lastmod>2026-11-02T00:08:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-quadratic-function-graphing/ssssspwp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-quadratic-function-graphing/ssssspwp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-quadratic-function-graphing/ssssspwp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-quadratic-function-graphing/ssssspwp"/>
      <lastmod>2026-11-02T00:08:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practice-construct-a-parallel-line/ssssspww</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-construct-a-parallel-line/ssssspww"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-construct-a-parallel-line/ssssspww"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-construct-a-parallel-line/ssssspww"/>
      <lastmod>2026-11-01T21:17:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practice-construct-a-parallel-line/ssssspww</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-construct-a-parallel-line/ssssspww"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-construct-a-parallel-line/ssssspww"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-construct-a-parallel-line/ssssspww"/>
      <lastmod>2026-11-01T21:17:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-prism-volume-calculation-demo/ssssspw6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-prism-volume-calculation-demo/ssssspw6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-prism-volume-calculation-demo/ssssspw6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-prism-volume-calculation-demo/ssssspw6"/>
      <lastmod>2026-11-02T17:38:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-prism-volume-calculation-demo/ssssspw6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-prism-volume-calculation-demo/ssssspw6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-prism-volume-calculation-demo/ssssspw6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-prism-volume-calculation-demo/ssssspw6"/>
      <lastmod>2026-11-02T17:38:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/investigating-the-circumcircle-of-a-triangle/ssssspwg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-the-circumcircle-of-a-triangle/ssssspwg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-the-circumcircle-of-a-triangle/ssssspwg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-the-circumcircle-of-a-triangle/ssssspwg"/>
      <lastmod>2026-11-02T18:49:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/investigating-the-circumcircle-of-a-triangle/ssssspwg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-the-circumcircle-of-a-triangle/ssssspwg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-the-circumcircle-of-a-triangle/ssssspwg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-the-circumcircle-of-a-triangle/ssssspwg"/>
      <lastmod>2026-11-02T18:49:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/place-value-addition-with-dots-by-yoel-istiawanto/ssssspw9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/place-value-addition-with-dots-by-yoel-istiawanto/ssssspw9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/place-value-addition-with-dots-by-yoel-istiawanto/ssssspw9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/place-value-addition-with-dots-by-yoel-istiawanto/ssssspw9"/>
      <lastmod>2026-11-02T13:28:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/place-value-addition-with-dots-by-yoel-istiawanto/ssssspw9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/place-value-addition-with-dots-by-yoel-istiawanto/ssssspw9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/place-value-addition-with-dots-by-yoel-istiawanto/ssssspw9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/place-value-addition-with-dots-by-yoel-istiawanto/ssssspw9"/>
      <lastmod>2026-11-02T13:28:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-fractions-with-same-numerator/ssssspwe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-fractions-with-same-numerator/ssssspwe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-fractions-with-same-numerator/ssssspwe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-fractions-with-same-numerator/ssssspwe"/>
      <lastmod>2026-11-01T23:35:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-fractions-with-same-numerator/ssssspwe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-fractions-with-same-numerator/ssssspwe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-fractions-with-same-numerator/ssssspwe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-fractions-with-same-numerator/ssssspwe"/>
      <lastmod>2026-11-01T23:35:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-with-two-sets-of-parallel-sides/ssssspwv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-with-two-sets-of-parallel-sides/ssssspwv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-with-two-sets-of-parallel-sides/ssssspwv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-with-two-sets-of-parallel-sides/ssssspwv"/>
      <lastmod>2026-11-02T18:55:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-with-two-sets-of-parallel-sides/ssssspwv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-with-two-sets-of-parallel-sides/ssssspwv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-with-two-sets-of-parallel-sides/ssssspwv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-with-two-sets-of-parallel-sides/ssssspwv"/>
      <lastmod>2026-11-02T18:55:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-cylinder-intersection/ssssspw4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-cylinder-intersection/ssssspw4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-cylinder-intersection/ssssspw4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-cylinder-intersection/ssssspw4"/>
      <lastmod>2026-11-02T18:36:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-cylinder-intersection/ssssspw4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-cylinder-intersection/ssssspw4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-cylinder-intersection/ssssspw4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-cylinder-intersection/ssssspw4"/>
      <lastmod>2026-11-02T18:36:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-exploration/ssssspwl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-exploration/ssssspwl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-exploration/ssssspwl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-exploration/ssssspwl"/>
      <lastmod>2026-11-01T21:09:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-exploration/ssssspwl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-exploration/ssssspwl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-exploration/ssssspwl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-exploration/ssssspwl"/>
      <lastmod>2026-11-01T21:09:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-table-plotting/ssssspwy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-table-plotting/ssssspwy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-table-plotting/ssssspwy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-table-plotting/ssssspwy"/>
      <lastmod>2026-11-02T02:22:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-table-plotting/ssssspwy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-table-plotting/ssssspwy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-table-plotting/ssssspwy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-table-plotting/ssssspwy"/>
      <lastmod>2026-11-02T02:22:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-demonstration-of-parallelogram-and-ellipse-intersection/ssssspwa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-parallelogram-and-ellipse-intersection/ssssspwa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demonstration-of-parallelogram-and-ellipse-intersection/ssssspwa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-parallelogram-and-ellipse-intersection/ssssspwa"/>
      <lastmod>2026-11-02T17:09:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-demonstration-of-parallelogram-and-ellipse-intersection/ssssspwa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-parallelogram-and-ellipse-intersection/ssssspwa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demonstration-of-parallelogram-and-ellipse-intersection/ssssspwa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-parallelogram-and-ellipse-intersection/ssssspwa"/>
      <lastmod>2026-11-02T17:09:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-programming-example-3/ssssspwc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-programming-example-3/ssssspwc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-programming-example-3/ssssspwc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-programming-example-3/ssssspwc"/>
      <lastmod>2026-11-01T19:26:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-programming-example-3/ssssspwc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-programming-example-3/ssssspwc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-programming-example-3/ssssspwc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-programming-example-3/ssssspwc"/>
      <lastmod>2026-11-01T19:26:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-midsegment-theorem-demonstration/ssssspwr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-midsegment-theorem-demonstration/ssssspwr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-midsegment-theorem-demonstration/ssssspwr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-midsegment-theorem-demonstration/ssssspwr"/>
      <lastmod>2026-11-01T21:11:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-midsegment-theorem-demonstration/ssssspwr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-midsegment-theorem-demonstration/ssssspwr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-midsegment-theorem-demonstration/ssssspwr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-midsegment-theorem-demonstration/ssssspwr"/>
      <lastmod>2026-11-01T21:11:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/artformer-helix/ssssspwh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/artformer-helix/ssssspwh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/artformer-helix/ssssspwh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/artformer-helix/ssssspwh"/>
      <lastmod>2026-11-01T19:11:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/artformer-helix/ssssspwh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/artformer-helix/ssssspwh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/artformer-helix/ssssspwh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/artformer-helix/ssssspwh"/>
      <lastmod>2026-11-01T19:11:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/subtraction-of-fractions-with-the-same-denominator-by-anthony-or/ssssspwt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtraction-of-fractions-with-the-same-denominator-by-anthony-or/ssssspwt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtraction-of-fractions-with-the-same-denominator-by-anthony-or/ssssspwt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtraction-of-fractions-with-the-same-denominator-by-anthony-or/ssssspwt"/>
      <lastmod>2026-11-02T11:44:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/subtraction-of-fractions-with-the-same-denominator-by-anthony-or/ssssspwt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtraction-of-fractions-with-the-same-denominator-by-anthony-or/ssssspwt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtraction-of-fractions-with-the-same-denominator-by-anthony-or/ssssspwt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtraction-of-fractions-with-the-same-denominator-by-anthony-or/ssssspwt"/>
      <lastmod>2026-11-02T11:44:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-rule-on-hyperbola/ssssspwx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-rule-on-hyperbola/ssssspwx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-rule-on-hyperbola/ssssspwx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-rule-on-hyperbola/ssssspwx"/>
      <lastmod>2026-11-02T17:48:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-rule-on-hyperbola/ssssspwx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-rule-on-hyperbola/ssssspwx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-rule-on-hyperbola/ssssspwx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-rule-on-hyperbola/ssssspwx"/>
      <lastmod>2026-11-02T17:48:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-comparison-by-damir-belavi/ssssspwi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-comparison-by-damir-belavi/ssssspwi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-comparison-by-damir-belavi/ssssspwi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-comparison-by-damir-belavi/ssssspwi"/>
      <lastmod>2026-11-02T18:26:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-comparison-by-damir-belavi/ssssspwi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-comparison-by-damir-belavi/ssssspwi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-comparison-by-damir-belavi/ssssspwi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-comparison-by-damir-belavi/ssssspwi"/>
      <lastmod>2026-11-02T18:26:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-properties-demo/ssssspwo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-properties-demo/ssssspwo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-properties-demo/ssssspwo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-properties-demo/ssssspwo"/>
      <lastmod>2026-11-01T19:27:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-properties-demo/ssssspwo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-properties-demo/ssssspwo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-properties-demo/ssssspwo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-properties-demo/ssssspwo"/>
      <lastmod>2026-11-01T19:27:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sort-geometric-figures/sssssp6s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sort-geometric-figures/sssssp6s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sort-geometric-figures/sssssp6s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sort-geometric-figures/sssssp6s"/>
      <lastmod>2026-11-02T15:48:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sort-geometric-figures/sssssp6s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sort-geometric-figures/sssssp6s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sort-geometric-figures/sssssp6s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sort-geometric-figures/sssssp6s"/>
      <lastmod>2026-11-02T15:48:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/random-operation-on-two-sets/sssssp67</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-operation-on-two-sets/sssssp67"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-operation-on-two-sets/sssssp67"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-operation-on-two-sets/sssssp67"/>
      <lastmod>2026-11-02T16:40:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/random-operation-on-two-sets/sssssp67</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-operation-on-two-sets/sssssp67"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-operation-on-two-sets/sssssp67"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-operation-on-two-sets/sssssp67"/>
      <lastmod>2026-11-02T16:40:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bryce-orthocenter/sssssp6n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bryce-orthocenter/sssssp6n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bryce-orthocenter/sssssp6n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bryce-orthocenter/sssssp6n"/>
      <lastmod>2026-11-02T16:48:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bryce-orthocenter/sssssp6n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bryce-orthocenter/sssssp6n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bryce-orthocenter/sssssp6n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bryce-orthocenter/sssssp6n"/>
      <lastmod>2026-11-02T16:48:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-cylinder-by-chandan-rathod/sssssp62</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-cylinder-by-chandan-rathod/sssssp62"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-cylinder-by-chandan-rathod/sssssp62"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-cylinder-by-chandan-rathod/sssssp62"/>
      <lastmod>2026-11-02T18:33:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-cylinder-by-chandan-rathod/sssssp62</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-cylinder-by-chandan-rathod/sssssp62"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-cylinder-by-chandan-rathod/sssssp62"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-cylinder-by-chandan-rathod/sssssp62"/>
      <lastmod>2026-11-02T18:33:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/representing-ratios-with-diagrams-im-6-2-2-lesson/sssssp6k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/representing-ratios-with-diagrams-im-6-2-2-lesson/sssssp6k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/representing-ratios-with-diagrams-im-6-2-2-lesson/sssssp6k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/representing-ratios-with-diagrams-im-6-2-2-lesson/sssssp6k"/>
      <lastmod>2026-11-01T20:38:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/representing-ratios-with-diagrams-im-6-2-2-lesson/sssssp6k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/representing-ratios-with-diagrams-im-6-2-2-lesson/sssssp6k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/representing-ratios-with-diagrams-im-6-2-2-lesson/sssssp6k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/representing-ratios-with-diagrams-im-6-2-2-lesson/sssssp6k"/>
      <lastmod>2026-11-01T20:38:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/combining-two-sine-waves/sssssp6z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/combining-two-sine-waves/sssssp6z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/combining-two-sine-waves/sssssp6z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/combining-two-sine-waves/sssssp6z"/>
      <lastmod>2026-11-02T16:46:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/combining-two-sine-waves/sssssp6z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/combining-two-sine-waves/sssssp6z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/combining-two-sine-waves/sssssp6z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/combining-two-sine-waves/sssssp6z"/>
      <lastmod>2026-11-02T16:46:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-dilation-parallelogram-scale-factor-demo/sssssp60</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-dilation-parallelogram-scale-factor-demo/sssssp60"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-dilation-parallelogram-scale-factor-demo/sssssp60"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-dilation-parallelogram-scale-factor-demo/sssssp60"/>
      <lastmod>2026-11-02T00:26:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-dilation-parallelogram-scale-factor-demo/sssssp60</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-dilation-parallelogram-scale-factor-demo/sssssp60"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-dilation-parallelogram-scale-factor-demo/sssssp60"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-dilation-parallelogram-scale-factor-demo/sssssp60"/>
      <lastmod>2026-11-02T00:26:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exercise-6-orthocenter-of-a-triangle/sssssp6d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-6-orthocenter-of-a-triangle/sssssp6d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-6-orthocenter-of-a-triangle/sssssp6d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-6-orthocenter-of-a-triangle/sssssp6d"/>
      <lastmod>2026-11-02T18:59:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exercise-6-orthocenter-of-a-triangle/sssssp6d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-6-orthocenter-of-a-triangle/sssssp6d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-6-orthocenter-of-a-triangle/sssssp6d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-6-orthocenter-of-a-triangle/sssssp6d"/>
      <lastmod>2026-11-02T18:59:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reciprocal-quadratic-functions-by-mark-modolo/sssssp6f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reciprocal-quadratic-functions-by-mark-modolo/sssssp6f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reciprocal-quadratic-functions-by-mark-modolo/sssssp6f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reciprocal-quadratic-functions-by-mark-modolo/sssssp6f"/>
      <lastmod>2026-11-02T18:19:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reciprocal-quadratic-functions-by-mark-modolo/sssssp6f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reciprocal-quadratic-functions-by-mark-modolo/sssssp6f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reciprocal-quadratic-functions-by-mark-modolo/sssssp6f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reciprocal-quadratic-functions-by-mark-modolo/sssssp6f"/>
      <lastmod>2026-11-02T18:19:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-and-side-lengths/sssssp68</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-and-side-lengths/sssssp68"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-and-side-lengths/sssssp68"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-and-side-lengths/sssssp68"/>
      <lastmod>2026-11-02T17:42:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-and-side-lengths/sssssp68</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-and-side-lengths/sssssp68"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-and-side-lengths/sssssp68"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-and-side-lengths/sssssp68"/>
      <lastmod>2026-11-02T17:42:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-focus-and-directrix-by-gary-rubinstein/sssssp6u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-focus-and-directrix-by-gary-rubinstein/sssssp6u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-focus-and-directrix-by-gary-rubinstein/sssssp6u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-focus-and-directrix-by-gary-rubinstein/sssssp6u"/>
      <lastmod>2026-11-01T19:31:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-focus-and-directrix-by-gary-rubinstein/sssssp6u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-focus-and-directrix-by-gary-rubinstein/sssssp6u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-focus-and-directrix-by-gary-rubinstein/sssssp6u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-focus-and-directrix-by-gary-rubinstein/sssssp6u"/>
      <lastmod>2026-11-01T19:31:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/regular-pentagon/sssssp65</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-pentagon/sssssp65"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-pentagon/sssssp65"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-pentagon/sssssp65"/>
      <lastmod>2026-11-02T18:00:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/regular-pentagon/sssssp65</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-pentagon/sssssp65"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-pentagon/sssssp65"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-pentagon/sssssp65"/>
      <lastmod>2026-11-02T18:00:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbolic-cylinders/sssssp6b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbolic-cylinders/sssssp6b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbolic-cylinders/sssssp6b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbolic-cylinders/sssssp6b"/>
      <lastmod>2026-11-01T23:49:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbolic-cylinders/sssssp6b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbolic-cylinders/sssssp6b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbolic-cylinders/sssssp6b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbolic-cylinders/sssssp6b"/>
      <lastmod>2026-11-01T23:49:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/special-quadrilateral-theorem-4/sssssp63</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-quadrilateral-theorem-4/sssssp63"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-quadrilateral-theorem-4/sssssp63"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-quadrilateral-theorem-4/sssssp63"/>
      <lastmod>2026-11-02T13:16:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/special-quadrilateral-theorem-4/sssssp63</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-quadrilateral-theorem-4/sssssp63"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-quadrilateral-theorem-4/sssssp63"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-quadrilateral-theorem-4/sssssp63"/>
      <lastmod>2026-11-02T13:16:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/repeated-reflections-in-a-hyperbola/sssssp6q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/repeated-reflections-in-a-hyperbola/sssssp6q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/repeated-reflections-in-a-hyperbola/sssssp6q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/repeated-reflections-in-a-hyperbola/sssssp6q"/>
      <lastmod>2026-11-02T18:36:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/repeated-reflections-in-a-hyperbola/sssssp6q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/repeated-reflections-in-a-hyperbola/sssssp6q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/repeated-reflections-in-a-hyperbola/sssssp6q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/repeated-reflections-in-a-hyperbola/sssssp6q"/>
      <lastmod>2026-11-02T18:36:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/residuals-on-a-scatter-diagram-demo/sssssp61</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/residuals-on-a-scatter-diagram-demo/sssssp61"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/residuals-on-a-scatter-diagram-demo/sssssp61"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/residuals-on-a-scatter-diagram-demo/sssssp61"/>
      <lastmod>2026-11-01T19:33:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/residuals-on-a-scatter-diagram-demo/sssssp61</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/residuals-on-a-scatter-diagram-demo/sssssp61"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/residuals-on-a-scatter-diagram-demo/sssssp61"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/residuals-on-a-scatter-diagram-demo/sssssp61"/>
      <lastmod>2026-11-01T19:33:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tables-equations-and-graphs-of-functions-practice/sssssp6m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tables-equations-and-graphs-of-functions-practice/sssssp6m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tables-equations-and-graphs-of-functions-practice/sssssp6m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tables-equations-and-graphs-of-functions-practice/sssssp6m"/>
      <lastmod>2026-11-02T10:37:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tables-equations-and-graphs-of-functions-practice/sssssp6m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tables-equations-and-graphs-of-functions-practice/sssssp6m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tables-equations-and-graphs-of-functions-practice/sssssp6m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tables-equations-and-graphs-of-functions-practice/sssssp6m"/>
      <lastmod>2026-11-02T10:37:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/maximum-area-of-polygon-with-fixed-perimeter/sssssp6j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximum-area-of-polygon-with-fixed-perimeter/sssssp6j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximum-area-of-polygon-with-fixed-perimeter/sssssp6j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximum-area-of-polygon-with-fixed-perimeter/sssssp6j"/>
      <lastmod>2026-11-01T21:02:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/maximum-area-of-polygon-with-fixed-perimeter/sssssp6j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximum-area-of-polygon-with-fixed-perimeter/sssssp6j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximum-area-of-polygon-with-fixed-perimeter/sssssp6j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximum-area-of-polygon-with-fixed-perimeter/sssssp6j"/>
      <lastmod>2026-11-01T21:02:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-triangle-on-sphere/sssssp6p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-triangle-on-sphere/sssssp6p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-triangle-on-sphere/sssssp6p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-triangle-on-sphere/sssssp6p"/>
      <lastmod>2026-11-02T12:05:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-triangle-on-sphere/sssssp6p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-triangle-on-sphere/sssssp6p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-triangle-on-sphere/sssssp6p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-triangle-on-sphere/sssssp6p"/>
      <lastmod>2026-11-02T12:05:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/elephant-parametric-curve/sssssp6w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/elephant-parametric-curve/sssssp6w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/elephant-parametric-curve/sssssp6w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/elephant-parametric-curve/sssssp6w"/>
      <lastmod>2026-11-02T16:30:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/elephant-parametric-curve/sssssp6w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/elephant-parametric-curve/sssssp6w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/elephant-parametric-curve/sssssp6w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/elephant-parametric-curve/sssssp6w"/>
      <lastmod>2026-11-02T16:30:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equivalent-fractions-visualized-pie-chart-comparison-with-interactive-sliders/sssssp66</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-fractions-visualized-pie-chart-comparison-with-interactive-sliders/sssssp66"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-fractions-visualized-pie-chart-comparison-with-interactive-sliders/sssssp66"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-fractions-visualized-pie-chart-comparison-with-interactive-sliders/sssssp66"/>
      <lastmod>2026-11-02T00:45:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equivalent-fractions-visualized-pie-chart-comparison-with-interactive-sliders/sssssp66</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-fractions-visualized-pie-chart-comparison-with-interactive-sliders/sssssp66"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-fractions-visualized-pie-chart-comparison-with-interactive-sliders/sssssp66"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-fractions-visualized-pie-chart-comparison-with-interactive-sliders/sssssp66"/>
      <lastmod>2026-11-02T00:45:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-locus-demonstration/sssssp6g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-locus-demonstration/sssssp6g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-locus-demonstration/sssssp6g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-locus-demonstration/sssssp6g"/>
      <lastmod>2026-11-02T17:45:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-locus-demonstration/sssssp6g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-locus-demonstration/sssssp6g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-locus-demonstration/sssssp6g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-locus-demonstration/sssssp6g"/>
      <lastmod>2026-11-02T17:45:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/atc-cobweb-diagram-example/sssssp69</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/atc-cobweb-diagram-example/sssssp69"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/atc-cobweb-diagram-example/sssssp69"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/atc-cobweb-diagram-example/sssssp69"/>
      <lastmod>2026-11-02T13:37:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/atc-cobweb-diagram-example/sssssp69</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/atc-cobweb-diagram-example/sssssp69"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/atc-cobweb-diagram-example/sssssp69"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/atc-cobweb-diagram-example/sssssp69"/>
      <lastmod>2026-11-02T13:37:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/connected-lissajous-curves/sssssp6e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connected-lissajous-curves/sssssp6e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connected-lissajous-curves/sssssp6e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connected-lissajous-curves/sssssp6e"/>
      <lastmod>2026-11-02T16:33:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/connected-lissajous-curves/sssssp6e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connected-lissajous-curves/sssssp6e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connected-lissajous-curves/sssssp6e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connected-lissajous-curves/sssssp6e"/>
      <lastmod>2026-11-02T16:33:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/algebra-of-plane-vectors/sssssp6v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebra-of-plane-vectors/sssssp6v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebra-of-plane-vectors/sssssp6v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebra-of-plane-vectors/sssssp6v"/>
      <lastmod>2026-11-02T12:36:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/algebra-of-plane-vectors/sssssp6v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebra-of-plane-vectors/sssssp6v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebra-of-plane-vectors/sssssp6v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebra-of-plane-vectors/sssssp6v"/>
      <lastmod>2026-11-02T12:36:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/splitting-into-equal-shapes/sssssp64</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/splitting-into-equal-shapes/sssssp64"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/splitting-into-equal-shapes/sssssp64"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/splitting-into-equal-shapes/sssssp64"/>
      <lastmod>2026-11-02T16:36:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/splitting-into-equal-shapes/sssssp64</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/splitting-into-equal-shapes/sssssp64"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/splitting-into-equal-shapes/sssssp64"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/splitting-into-equal-shapes/sssssp64"/>
      <lastmod>2026-11-02T16:36:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arithmetic-mean-square-of-right-triangle/sssssp6l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-mean-square-of-right-triangle/sssssp6l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-mean-square-of-right-triangle/sssssp6l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-mean-square-of-right-triangle/sssssp6l"/>
      <lastmod>2026-11-01T21:39:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arithmetic-mean-square-of-right-triangle/sssssp6l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-mean-square-of-right-triangle/sssssp6l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-mean-square-of-right-triangle/sssssp6l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-mean-square-of-right-triangle/sssssp6l"/>
      <lastmod>2026-11-01T21:39:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/discontinuity-with/sssssp6y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discontinuity-with/sssssp6y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discontinuity-with/sssssp6y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discontinuity-with/sssssp6y"/>
      <lastmod>2026-11-01T23:12:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/discontinuity-with/sssssp6y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discontinuity-with/sssssp6y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discontinuity-with/sssssp6y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discontinuity-with/sssssp6y"/>
      <lastmod>2026-11-01T23:12:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/central-angle-inscribed-angle-circular-segment-angle-and-arc/sssssp6a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/central-angle-inscribed-angle-circular-segment-angle-and-arc/sssssp6a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/central-angle-inscribed-angle-circular-segment-angle-and-arc/sssssp6a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/central-angle-inscribed-angle-circular-segment-angle-and-arc/sssssp6a"/>
      <lastmod>2026-11-01T19:37:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/central-angle-inscribed-angle-circular-segment-angle-and-arc/sssssp6a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/central-angle-inscribed-angle-circular-segment-angle-and-arc/sssssp6a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/central-angle-inscribed-angle-circular-segment-angle-and-arc/sssssp6a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/central-angle-inscribed-angle-circular-segment-angle-and-arc/sssssp6a"/>
      <lastmod>2026-11-01T19:37:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ideal-hyperbolic-tetrahedra/sssssp6c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ideal-hyperbolic-tetrahedra/sssssp6c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ideal-hyperbolic-tetrahedra/sssssp6c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ideal-hyperbolic-tetrahedra/sssssp6c"/>
      <lastmod>2026-11-02T12:46:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ideal-hyperbolic-tetrahedra/sssssp6c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ideal-hyperbolic-tetrahedra/sssssp6c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ideal-hyperbolic-tetrahedra/sssssp6c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ideal-hyperbolic-tetrahedra/sssssp6c"/>
      <lastmod>2026-11-02T12:46:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/latin-cross-cube-net/sssssp6r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/latin-cross-cube-net/sssssp6r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/latin-cross-cube-net/sssssp6r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/latin-cross-cube-net/sssssp6r"/>
      <lastmod>2026-11-02T17:08:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/latin-cross-cube-net/sssssp6r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/latin-cross-cube-net/sssssp6r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/latin-cross-cube-net/sssssp6r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/latin-cross-cube-net/sssssp6r"/>
      <lastmod>2026-11-02T17:08:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ace-king-pair-game-example/sssssp6h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ace-king-pair-game-example/sssssp6h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ace-king-pair-game-example/sssssp6h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ace-king-pair-game-example/sssssp6h"/>
      <lastmod>2026-11-01T20:55:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ace-king-pair-game-example/sssssp6h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ace-king-pair-game-example/sssssp6h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ace-king-pair-game-example/sssssp6h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ace-king-pair-game-example/sssssp6h"/>
      <lastmod>2026-11-01T20:55:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/understanding-prisms-and-pyramids/sssssp6t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/understanding-prisms-and-pyramids/sssssp6t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/understanding-prisms-and-pyramids/sssssp6t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/understanding-prisms-and-pyramids/sssssp6t"/>
      <lastmod>2026-11-02T18:22:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/understanding-prisms-and-pyramids/sssssp6t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/understanding-prisms-and-pyramids/sssssp6t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/understanding-prisms-and-pyramids/sssssp6t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/understanding-prisms-and-pyramids/sssssp6t"/>
      <lastmod>2026-11-02T18:22:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/revolution-surfaces/sssssp6x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/revolution-surfaces/sssssp6x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/revolution-surfaces/sssssp6x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/revolution-surfaces/sssssp6x"/>
      <lastmod>2026-11-02T02:25:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/revolution-surfaces/sssssp6x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/revolution-surfaces/sssssp6x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/revolution-surfaces/sssssp6x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/revolution-surfaces/sssssp6x"/>
      <lastmod>2026-11-02T02:25:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-sphere-cylinder/sssssp6i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-sphere-cylinder/sssssp6i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-sphere-cylinder/sssssp6i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-sphere-cylinder/sssssp6i"/>
      <lastmod>2026-11-02T08:51:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-sphere-cylinder/sssssp6i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-sphere-cylinder/sssssp6i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-sphere-cylinder/sssssp6i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-sphere-cylinder/sssssp6i"/>
      <lastmod>2026-11-02T08:51:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/median-line-piecewise-logarithmic-functions-example/sssssp6o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/median-line-piecewise-logarithmic-functions-example/sssssp6o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/median-line-piecewise-logarithmic-functions-example/sssssp6o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/median-line-piecewise-logarithmic-functions-example/sssssp6o"/>
      <lastmod>2026-11-02T02:59:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/median-line-piecewise-logarithmic-functions-example/sssssp6o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/median-line-piecewise-logarithmic-functions-example/sssssp6o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/median-line-piecewise-logarithmic-functions-example/sssssp6o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/median-line-piecewise-logarithmic-functions-example/sssssp6o"/>
      <lastmod>2026-11-02T02:59:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/motion-attractor/ssssspgs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/motion-attractor/ssssspgs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/motion-attractor/ssssspgs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/motion-attractor/ssssspgs"/>
      <lastmod>2026-11-02T02:53:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/motion-attractor/ssssspgs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/motion-attractor/ssssspgs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/motion-attractor/ssssspgs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/motion-attractor/ssssspgs"/>
      <lastmod>2026-11-02T02:53:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/points-lines-planes-interactive-geometric-construction/ssssspg7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/points-lines-planes-interactive-geometric-construction/ssssspg7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/points-lines-planes-interactive-geometric-construction/ssssspg7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/points-lines-planes-interactive-geometric-construction/ssssspg7"/>
      <lastmod>2026-11-02T18:03:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/points-lines-planes-interactive-geometric-construction/ssssspg7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/points-lines-planes-interactive-geometric-construction/ssssspg7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/points-lines-planes-interactive-geometric-construction/ssssspg7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/points-lines-planes-interactive-geometric-construction/ssssspg7"/>
      <lastmod>2026-11-02T18:03:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equilateral-triangle-reflection-puzzle-by-david-wees/ssssspgn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equilateral-triangle-reflection-puzzle-by-david-wees/ssssspgn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equilateral-triangle-reflection-puzzle-by-david-wees/ssssspgn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equilateral-triangle-reflection-puzzle-by-david-wees/ssssspgn"/>
      <lastmod>2026-11-02T17:37:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equilateral-triangle-reflection-puzzle-by-david-wees/ssssspgn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equilateral-triangle-reflection-puzzle-by-david-wees/ssssspgn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equilateral-triangle-reflection-puzzle-by-david-wees/ssssspgn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equilateral-triangle-reflection-puzzle-by-david-wees/ssssspgn"/>
      <lastmod>2026-11-02T17:37:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-perpendicular-lines-to-chords-of-circles/ssssspg2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-perpendicular-lines-to-chords-of-circles/ssssspg2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-perpendicular-lines-to-chords-of-circles/ssssspg2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-perpendicular-lines-to-chords-of-circles/ssssspg2"/>
      <lastmod>2026-11-02T18:14:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-perpendicular-lines-to-chords-of-circles/ssssspg2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-perpendicular-lines-to-chords-of-circles/ssssspg2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-perpendicular-lines-to-chords-of-circles/ssssspg2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-perpendicular-lines-to-chords-of-circles/ssssspg2"/>
      <lastmod>2026-11-02T18:14:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sohcahtoa-solving-right-triangle-sides-with-trigonometry/ssssspgk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sohcahtoa-solving-right-triangle-sides-with-trigonometry/ssssspgk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sohcahtoa-solving-right-triangle-sides-with-trigonometry/ssssspgk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sohcahtoa-solving-right-triangle-sides-with-trigonometry/ssssspgk"/>
      <lastmod>2026-11-01T21:28:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sohcahtoa-solving-right-triangle-sides-with-trigonometry/ssssspgk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sohcahtoa-solving-right-triangle-sides-with-trigonometry/ssssspgk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sohcahtoa-solving-right-triangle-sides-with-trigonometry/ssssspgk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sohcahtoa-solving-right-triangle-sides-with-trigonometry/ssssspgk"/>
      <lastmod>2026-11-01T21:28:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-2-rotation-and-parallel-lines-construction/ssssspgz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-2-rotation-and-parallel-lines-construction/ssssspgz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-2-rotation-and-parallel-lines-construction/ssssspgz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-2-rotation-and-parallel-lines-construction/ssssspgz"/>
      <lastmod>2026-11-02T18:58:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-2-rotation-and-parallel-lines-construction/ssssspgz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-2-rotation-and-parallel-lines-construction/ssssspgz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-2-rotation-and-parallel-lines-construction/ssssspgz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-2-rotation-and-parallel-lines-construction/ssssspgz"/>
      <lastmod>2026-11-02T18:58:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-planes-and-linear-approximations-example-by-noah/ssssspg0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-planes-and-linear-approximations-example-by-noah/ssssspg0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-planes-and-linear-approximations-example-by-noah/ssssspg0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-planes-and-linear-approximations-example-by-noah/ssssspg0"/>
      <lastmod>2026-11-02T09:34:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-planes-and-linear-approximations-example-by-noah/ssssspg0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-planes-and-linear-approximations-example-by-noah/ssssspg0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-planes-and-linear-approximations-example-by-noah/ssssspg0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-planes-and-linear-approximations-example-by-noah/ssssspg0"/>
      <lastmod>2026-11-02T09:34:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/puzzle-cube-demonstration/ssssspgd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/puzzle-cube-demonstration/ssssspgd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/puzzle-cube-demonstration/ssssspgd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/puzzle-cube-demonstration/ssssspgd"/>
      <lastmod>2026-11-01T21:37:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/puzzle-cube-demonstration/ssssspgd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/puzzle-cube-demonstration/ssssspgd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/puzzle-cube-demonstration/ssssspgd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/puzzle-cube-demonstration/ssssspgd"/>
      <lastmod>2026-11-01T21:37:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/heat-equation-simulation-on-a-2d-grid/ssssspgf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/heat-equation-simulation-on-a-2d-grid/ssssspgf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/heat-equation-simulation-on-a-2d-grid/ssssspgf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/heat-equation-simulation-on-a-2d-grid/ssssspgf"/>
      <lastmod>2026-11-01T19:24:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/heat-equation-simulation-on-a-2d-grid/ssssspgf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/heat-equation-simulation-on-a-2d-grid/ssssspgf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/heat-equation-simulation-on-a-2d-grid/ssssspgf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/heat-equation-simulation-on-a-2d-grid/ssssspgf"/>
      <lastmod>2026-11-01T19:24:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-under-curve-using-geometric-probability/ssssspg8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-under-curve-using-geometric-probability/ssssspg8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-under-curve-using-geometric-probability/ssssspg8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-under-curve-using-geometric-probability/ssssspg8"/>
      <lastmod>2026-11-01T22:04:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-under-curve-using-geometric-probability/ssssspg8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-under-curve-using-geometric-probability/ssssspg8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-under-curve-using-geometric-probability/ssssspg8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-under-curve-using-geometric-probability/ssssspg8"/>
      <lastmod>2026-11-01T22:04:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/20th-roots/ssssspgu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/20th-roots/ssssspgu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/20th-roots/ssssspgu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/20th-roots/ssssspgu"/>
      <lastmod>2026-11-01T21:00:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/20th-roots/ssssspgu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/20th-roots/ssssspgu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/20th-roots/ssssspgu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/20th-roots/ssssspgu"/>
      <lastmod>2026-11-01T21:00:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/internal-coloring-of-the-mandelbrot-set/ssssspg5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/internal-coloring-of-the-mandelbrot-set/ssssspg5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/internal-coloring-of-the-mandelbrot-set/ssssspg5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/internal-coloring-of-the-mandelbrot-set/ssssspg5"/>
      <lastmod>2026-11-02T17:36:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/internal-coloring-of-the-mandelbrot-set/ssssspg5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/internal-coloring-of-the-mandelbrot-set/ssssspg5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/internal-coloring-of-the-mandelbrot-set/ssssspg5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/internal-coloring-of-the-mandelbrot-set/ssssspg5"/>
      <lastmod>2026-11-02T17:36:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/starting-from-a-dodecahedron-to-create-islamic-geometric-patterns/ssssspgb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/starting-from-a-dodecahedron-to-create-islamic-geometric-patterns/ssssspgb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/starting-from-a-dodecahedron-to-create-islamic-geometric-patterns/ssssspgb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/starting-from-a-dodecahedron-to-create-islamic-geometric-patterns/ssssspgb"/>
      <lastmod>2026-11-01T21:04:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/starting-from-a-dodecahedron-to-create-islamic-geometric-patterns/ssssspgb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/starting-from-a-dodecahedron-to-create-islamic-geometric-patterns/ssssspgb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/starting-from-a-dodecahedron-to-create-islamic-geometric-patterns/ssssspgb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/starting-from-a-dodecahedron-to-create-islamic-geometric-patterns/ssssspgb"/>
      <lastmod>2026-11-01T21:04:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spiky-ball-model/ssssspg3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiky-ball-model/ssssspg3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiky-ball-model/ssssspg3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiky-ball-model/ssssspg3"/>
      <lastmod>2026-11-02T02:49:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spiky-ball-model/ssssspg3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiky-ball-model/ssssspg3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiky-ball-model/ssssspg3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiky-ball-model/ssssspg3"/>
      <lastmod>2026-11-02T02:49:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/domain-and-range-for-exponential-functions/ssssspgq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/domain-and-range-for-exponential-functions/ssssspgq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/domain-and-range-for-exponential-functions/ssssspgq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/domain-and-range-for-exponential-functions/ssssspgq"/>
      <lastmod>2026-11-02T15:15:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/domain-and-range-for-exponential-functions/ssssspgq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/domain-and-range-for-exponential-functions/ssssspgq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/domain-and-range-for-exponential-functions/ssssspgq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/domain-and-range-for-exponential-functions/ssssspgq"/>
      <lastmod>2026-11-02T15:15:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/converting-mixed-numbers-to-improper-fractions/ssssspg1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/converting-mixed-numbers-to-improper-fractions/ssssspg1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/converting-mixed-numbers-to-improper-fractions/ssssspg1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/converting-mixed-numbers-to-improper-fractions/ssssspg1"/>
      <lastmod>2026-11-02T00:24:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/converting-mixed-numbers-to-improper-fractions/ssssspg1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/converting-mixed-numbers-to-improper-fractions/ssssspg1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/converting-mixed-numbers-to-improper-fractions/ssssspg1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/converting-mixed-numbers-to-improper-fractions/ssssspg1"/>
      <lastmod>2026-11-02T00:24:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-demo-by-reza-khadem/ssssspgm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-demo-by-reza-khadem/ssssspgm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-demo-by-reza-khadem/ssssspgm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-demo-by-reza-khadem/ssssspgm"/>
      <lastmod>2026-11-02T18:09:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-demo-by-reza-khadem/ssssspgm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-demo-by-reza-khadem/ssssspgm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-demo-by-reza-khadem/ssssspgm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-demo-by-reza-khadem/ssssspgm"/>
      <lastmod>2026-11-02T18:09:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilations-by-patricia-arnold/ssssspgj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-by-patricia-arnold/ssssspgj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-by-patricia-arnold/ssssspgj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-by-patricia-arnold/ssssspgj"/>
      <lastmod>2026-11-02T12:06:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilations-by-patricia-arnold/ssssspgj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-by-patricia-arnold/ssssspgj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-by-patricia-arnold/ssssspgj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-by-patricia-arnold/ssssspgj"/>
      <lastmod>2026-11-02T12:06:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/double-translation-tiling/ssssspgp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-translation-tiling/ssssspgp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-translation-tiling/ssssspgp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-translation-tiling/ssssspgp"/>
      <lastmod>2026-11-02T12:02:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/double-translation-tiling/ssssspgp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-translation-tiling/ssssspgp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-translation-tiling/ssssspgp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-translation-tiling/ssssspgp"/>
      <lastmod>2026-11-02T12:02:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-number-multiplication-demo/ssssspgw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-multiplication-demo/ssssspgw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-multiplication-demo/ssssspgw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-multiplication-demo/ssssspgw"/>
      <lastmod>2026-11-01T19:27:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-number-multiplication-demo/ssssspgw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-multiplication-demo/ssssspgw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-multiplication-demo/ssssspgw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-multiplication-demo/ssssspgw"/>
      <lastmod>2026-11-01T19:27:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/smart-rock-paper-scissors/ssssspg6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/smart-rock-paper-scissors/ssssspg6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/smart-rock-paper-scissors/ssssspg6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/smart-rock-paper-scissors/ssssspg6"/>
      <lastmod>2026-11-02T18:49:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/smart-rock-paper-scissors/ssssspg6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/smart-rock-paper-scissors/ssssspg6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/smart-rock-paper-scissors/ssssspg6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/smart-rock-paper-scissors/ssssspg6"/>
      <lastmod>2026-11-02T18:49:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/number-line-inequalities-demo/ssssspgg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-line-inequalities-demo/ssssspgg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-line-inequalities-demo/ssssspgg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-line-inequalities-demo/ssssspgg"/>
      <lastmod>2026-11-01T21:18:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/number-line-inequalities-demo/ssssspgg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-line-inequalities-demo/ssssspgg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-line-inequalities-demo/ssssspgg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-line-inequalities-demo/ssssspgg"/>
      <lastmod>2026-11-01T21:18:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-geometry-demonstration/ssssspg9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-geometry-demonstration/ssssspg9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-geometry-demonstration/ssssspg9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-geometry-demonstration/ssssspg9"/>
      <lastmod>2026-11-01T19:17:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-geometry-demonstration/ssssspg9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-geometry-demonstration/ssssspg9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-geometry-demonstration/ssssspg9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-geometry-demonstration/ssssspg9"/>
      <lastmod>2026-11-01T19:17:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hinged-squares-a-visual-route-to-pythagoras-theorem/ssssspge</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hinged-squares-a-visual-route-to-pythagoras-theorem/ssssspge"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hinged-squares-a-visual-route-to-pythagoras-theorem/ssssspge"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hinged-squares-a-visual-route-to-pythagoras-theorem/ssssspge"/>
      <lastmod>2026-11-01T21:16:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hinged-squares-a-visual-route-to-pythagoras-theorem/ssssspge</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hinged-squares-a-visual-route-to-pythagoras-theorem/ssssspge"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hinged-squares-a-visual-route-to-pythagoras-theorem/ssssspge"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hinged-squares-a-visual-route-to-pythagoras-theorem/ssssspge"/>
      <lastmod>2026-11-01T21:16:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definition-of-a-rhombus/ssssspgv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-of-a-rhombus/ssssspgv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-of-a-rhombus/ssssspgv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-of-a-rhombus/ssssspgv"/>
      <lastmod>2026-11-01T23:13:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definition-of-a-rhombus/ssssspgv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-of-a-rhombus/ssssspgv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-of-a-rhombus/ssssspgv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-of-a-rhombus/ssssspgv"/>
      <lastmod>2026-11-01T23:13:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-15-gon-with-perimeter-p-180/ssssspg4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-15-gon-with-perimeter-p-180/ssssspg4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-15-gon-with-perimeter-p-180/ssssspg4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-15-gon-with-perimeter-p-180/ssssspg4"/>
      <lastmod>2026-11-01T23:27:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-15-gon-with-perimeter-p-180/ssssspg4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-15-gon-with-perimeter-p-180/ssssspg4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-15-gon-with-perimeter-p-180/ssssspg4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-15-gon-with-perimeter-p-180/ssssspg4"/>
      <lastmod>2026-11-01T23:27:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finish-the-triangle-1/ssssspgl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finish-the-triangle-1/ssssspgl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finish-the-triangle-1/ssssspgl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finish-the-triangle-1/ssssspgl"/>
      <lastmod>2026-11-01T23:09:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finish-the-triangle-1/ssssspgl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finish-the-triangle-1/ssssspgl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finish-the-triangle-1/ssssspgl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finish-the-triangle-1/ssssspgl"/>
      <lastmod>2026-11-01T23:09:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/curvy-slide-equilateral-triangle-cross-sections/ssssspgy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curvy-slide-equilateral-triangle-cross-sections/ssssspgy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curvy-slide-equilateral-triangle-cross-sections/ssssspgy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curvy-slide-equilateral-triangle-cross-sections/ssssspgy"/>
      <lastmod>2026-11-01T19:28:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/curvy-slide-equilateral-triangle-cross-sections/ssssspgy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curvy-slide-equilateral-triangle-cross-sections/ssssspgy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curvy-slide-equilateral-triangle-cross-sections/ssssspgy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curvy-slide-equilateral-triangle-cross-sections/ssssspgy"/>
      <lastmod>2026-11-01T19:28:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-quadratic-functions-by-mathgroup/ssssspga</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-by-mathgroup/ssssspga"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-functions-by-mathgroup/ssssspga"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-by-mathgroup/ssssspga"/>
      <lastmod>2026-11-02T16:52:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-quadratic-functions-by-mathgroup/ssssspga</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-by-mathgroup/ssssspga"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-functions-by-mathgroup/ssssspga"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-by-mathgroup/ssssspga"/>
      <lastmod>2026-11-02T16:52:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-a-function-by-juan-carlos-ponce-campuzano/ssssspgc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-a-function-by-juan-carlos-ponce-campuzano/ssssspgc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-a-function-by-juan-carlos-ponce-campuzano/ssssspgc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-a-function-by-juan-carlos-ponce-campuzano/ssssspgc"/>
      <lastmod>2026-11-02T09:33:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-of-a-function-by-juan-carlos-ponce-campuzano/ssssspgc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-a-function-by-juan-carlos-ponce-campuzano/ssssspgc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-a-function-by-juan-carlos-ponce-campuzano/ssssspgc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-a-function-by-juan-carlos-ponce-campuzano/ssssspgc"/>
      <lastmod>2026-11-02T09:33:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/decagons-and-pentagons-in-islamic-geometry/ssssspgr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decagons-and-pentagons-in-islamic-geometry/ssssspgr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decagons-and-pentagons-in-islamic-geometry/ssssspgr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decagons-and-pentagons-in-islamic-geometry/ssssspgr"/>
      <lastmod>2026-11-01T19:35:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/decagons-and-pentagons-in-islamic-geometry/ssssspgr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decagons-and-pentagons-in-islamic-geometry/ssssspgr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decagons-and-pentagons-in-islamic-geometry/ssssspgr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decagons-and-pentagons-in-islamic-geometry/ssssspgr"/>
      <lastmod>2026-11-01T19:35:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/filling-a-sphere/ssssspgh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/filling-a-sphere/ssssspgh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/filling-a-sphere/ssssspgh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/filling-a-sphere/ssssspgh"/>
      <lastmod>2026-11-02T03:16:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/filling-a-sphere/ssssspgh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/filling-a-sphere/ssssspgh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/filling-a-sphere/ssssspgh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/filling-a-sphere/ssssspgh"/>
      <lastmod>2026-11-02T03:16:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/like-terms/ssssspgt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/like-terms/ssssspgt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/like-terms/ssssspgt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/like-terms/ssssspgt"/>
      <lastmod>2026-11-02T02:25:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/like-terms/ssssspgt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/like-terms/ssssspgt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/like-terms/ssssspgt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/like-terms/ssssspgt"/>
      <lastmod>2026-11-02T02:25:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-and-cube/ssssspgx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-and-cube/ssssspgx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-and-cube/ssssspgx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-and-cube/ssssspgx"/>
      <lastmod>2026-11-02T16:41:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-and-cube/ssssspgx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-and-cube/ssssspgx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-and-cube/ssssspgx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-and-cube/ssssspgx"/>
      <lastmod>2026-11-02T16:41:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/law-of-cosines-proof/ssssspgi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-cosines-proof/ssssspgi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-cosines-proof/ssssspgi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-cosines-proof/ssssspgi"/>
      <lastmod>2026-11-02T09:46:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/law-of-cosines-proof/ssssspgi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-cosines-proof/ssssspgi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-cosines-proof/ssssspgi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-cosines-proof/ssssspgi"/>
      <lastmod>2026-11-02T09:46:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-vs-standard-normal-distribution-interval/ssssspgo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-vs-standard-normal-distribution-interval/ssssspgo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-vs-standard-normal-distribution-interval/ssssspgo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-vs-standard-normal-distribution-interval/ssssspgo"/>
      <lastmod>2026-11-01T21:16:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-vs-standard-normal-distribution-interval/ssssspgo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-vs-standard-normal-distribution-interval/ssssspgo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-vs-standard-normal-distribution-interval/ssssspgo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-vs-standard-normal-distribution-interval/ssssspgo"/>
      <lastmod>2026-11-01T21:16:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-in-a-box/sssssp9s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-in-a-box/sssssp9s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-in-a-box/sssssp9s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-in-a-box/sssssp9s"/>
      <lastmod>2026-11-02T17:05:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-in-a-box/sssssp9s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-in-a-box/sssssp9s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-in-a-box/sssssp9s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-in-a-box/sssssp9s"/>
      <lastmod>2026-11-02T17:05:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-transformation-and-polygon-demo/sssssp97</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-transformation-and-polygon-demo/sssssp97"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-transformation-and-polygon-demo/sssssp97"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-transformation-and-polygon-demo/sssssp97"/>
      <lastmod>2026-11-02T02:31:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-transformation-and-polygon-demo/sssssp97</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-transformation-and-polygon-demo/sssssp97"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-transformation-and-polygon-demo/sssssp97"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-transformation-and-polygon-demo/sssssp97"/>
      <lastmod>2026-11-02T02:31:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equilateral-triangle-assessment-side-lengths-angles-and-vector-relations/sssssp9n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equilateral-triangle-assessment-side-lengths-angles-and-vector-relations/sssssp9n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equilateral-triangle-assessment-side-lengths-angles-and-vector-relations/sssssp9n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equilateral-triangle-assessment-side-lengths-angles-and-vector-relations/sssssp9n"/>
      <lastmod>2026-11-01T21:22:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equilateral-triangle-assessment-side-lengths-angles-and-vector-relations/sssssp9n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equilateral-triangle-assessment-side-lengths-angles-and-vector-relations/sssssp9n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equilateral-triangle-assessment-side-lengths-angles-and-vector-relations/sssssp9n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equilateral-triangle-assessment-side-lengths-angles-and-vector-relations/sssssp9n"/>
      <lastmod>2026-11-01T21:22:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definite-integral-approximations/sssssp92</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-approximations/sssssp92"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-approximations/sssssp92"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-approximations/sssssp92"/>
      <lastmod>2026-11-02T09:33:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definite-integral-approximations/sssssp92</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-approximations/sssssp92"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-approximations/sssssp92"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-approximations/sssssp92"/>
      <lastmod>2026-11-02T09:33:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-a-sphere-by-krupongsak-wuttisant-th/sssssp9k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-sphere-by-krupongsak-wuttisant-th/sssssp9k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-sphere-by-krupongsak-wuttisant-th/sssssp9k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-sphere-by-krupongsak-wuttisant-th/sssssp9k"/>
      <lastmod>2026-11-01T23:33:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-a-sphere-by-krupongsak-wuttisant-th/sssssp9k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-sphere-by-krupongsak-wuttisant-th/sssssp9k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-sphere-by-krupongsak-wuttisant-th/sssssp9k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-sphere-by-krupongsak-wuttisant-th/sssssp9k"/>
      <lastmod>2026-11-01T23:33:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflections-group-2-example-3/sssssp9z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-group-2-example-3/sssssp9z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-group-2-example-3/sssssp9z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-group-2-example-3/sssssp9z"/>
      <lastmod>2026-11-02T18:42:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflections-group-2-example-3/sssssp9z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-group-2-example-3/sssssp9z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-group-2-example-3/sssssp9z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-group-2-example-3/sssssp9z"/>
      <lastmod>2026-11-02T18:42:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/identifying-quadratic-functions-from-roots/sssssp90</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identifying-quadratic-functions-from-roots/sssssp90"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identifying-quadratic-functions-from-roots/sssssp90"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identifying-quadratic-functions-from-roots/sssssp90"/>
      <lastmod>2026-11-02T12:05:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/identifying-quadratic-functions-from-roots/sssssp90</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identifying-quadratic-functions-from-roots/sssssp90"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identifying-quadratic-functions-from-roots/sssssp90"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identifying-quadratic-functions-from-roots/sssssp90"/>
      <lastmod>2026-11-02T12:05:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-areas-of-polygons-by-thomas-smith/sssssp9d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-areas-of-polygons-by-thomas-smith/sssssp9d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-areas-of-polygons-by-thomas-smith/sssssp9d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-areas-of-polygons-by-thomas-smith/sssssp9d"/>
      <lastmod>2026-11-02T03:03:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-areas-of-polygons-by-thomas-smith/sssssp9d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-areas-of-polygons-by-thomas-smith/sssssp9d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-areas-of-polygons-by-thomas-smith/sssssp9d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-areas-of-polygons-by-thomas-smith/sssssp9d"/>
      <lastmod>2026-11-02T03:03:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/addition-of-angles-dynamic-demonstration-of-angle-summation/sssssp9f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-of-angles-dynamic-demonstration-of-angle-summation/sssssp9f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-of-angles-dynamic-demonstration-of-angle-summation/sssssp9f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-of-angles-dynamic-demonstration-of-angle-summation/sssssp9f"/>
      <lastmod>2026-11-02T18:58:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/addition-of-angles-dynamic-demonstration-of-angle-summation/sssssp9f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-of-angles-dynamic-demonstration-of-angle-summation/sssssp9f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-of-angles-dynamic-demonstration-of-angle-summation/sssssp9f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-of-angles-dynamic-demonstration-of-angle-summation/sssssp9f"/>
      <lastmod>2026-11-02T18:58:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quiz-on-circle-equation/sssssp98</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-on-circle-equation/sssssp98"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-on-circle-equation/sssssp98"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-on-circle-equation/sssssp98"/>
      <lastmod>2026-11-02T00:02:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quiz-on-circle-equation/sssssp98</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-on-circle-equation/sssssp98"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-on-circle-equation/sssssp98"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-on-circle-equation/sssssp98"/>
      <lastmod>2026-11-02T00:02:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-slice-model/sssssp9u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-slice-model/sssssp9u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-slice-model/sssssp9u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-slice-model/sssssp9u"/>
      <lastmod>2026-11-01T19:04:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-slice-model/sssssp9u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-slice-model/sssssp9u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-slice-model/sssssp9u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-slice-model/sssssp9u"/>
      <lastmod>2026-11-01T19:04:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-problem/sssssp95</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-problem/sssssp95"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-problem/sssssp95"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-problem/sssssp95"/>
      <lastmod>2026-11-02T18:51:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-problem/sssssp95</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-problem/sssssp95"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-problem/sssssp95"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-problem/sssssp95"/>
      <lastmod>2026-11-02T18:51:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezium-diagonal/sssssp9b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-diagonal/sssssp9b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-diagonal/sssssp9b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-diagonal/sssssp9b"/>
      <lastmod>2026-11-02T08:46:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezium-diagonal/sssssp9b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-diagonal/sssssp9b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-diagonal/sssssp9b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-diagonal/sssssp9b"/>
      <lastmod>2026-11-02T08:46:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/experimentation-on-the-bisoptic-of-parabolas/sssssp93</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/experimentation-on-the-bisoptic-of-parabolas/sssssp93"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/experimentation-on-the-bisoptic-of-parabolas/sssssp93"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/experimentation-on-the-bisoptic-of-parabolas/sssssp93"/>
      <lastmod>2026-11-01T21:00:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/experimentation-on-the-bisoptic-of-parabolas/sssssp93</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/experimentation-on-the-bisoptic-of-parabolas/sssssp93"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/experimentation-on-the-bisoptic-of-parabolas/sssssp93"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/experimentation-on-the-bisoptic-of-parabolas/sssssp93"/>
      <lastmod>2026-11-01T21:00:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cobweb-and-staircase-diagrams/sssssp9q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cobweb-and-staircase-diagrams/sssssp9q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cobweb-and-staircase-diagrams/sssssp9q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cobweb-and-staircase-diagrams/sssssp9q"/>
      <lastmod>2026-11-02T08:37:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cobweb-and-staircase-diagrams/sssssp9q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cobweb-and-staircase-diagrams/sssssp9q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cobweb-and-staircase-diagrams/sssssp9q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cobweb-and-staircase-diagrams/sssssp9q"/>
      <lastmod>2026-11-02T08:37:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/contour-of-saddle-surface-in-axonometry-2/sssssp91</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/contour-of-saddle-surface-in-axonometry-2/sssssp91"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/contour-of-saddle-surface-in-axonometry-2/sssssp91"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/contour-of-saddle-surface-in-axonometry-2/sssssp91"/>
      <lastmod>2026-11-01T20:51:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/contour-of-saddle-surface-in-axonometry-2/sssssp91</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/contour-of-saddle-surface-in-axonometry-2/sssssp91"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/contour-of-saddle-surface-in-axonometry-2/sssssp91"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/contour-of-saddle-surface-in-axonometry-2/sssssp91"/>
      <lastmod>2026-11-01T20:51:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/same-correspondence-rules-different-stories/sssssp9m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/same-correspondence-rules-different-stories/sssssp9m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/same-correspondence-rules-different-stories/sssssp9m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/same-correspondence-rules-different-stories/sssssp9m"/>
      <lastmod>2026-11-02T17:03:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/same-correspondence-rules-different-stories/sssssp9m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/same-correspondence-rules-different-stories/sssssp9m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/same-correspondence-rules-different-stories/sssssp9m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/same-correspondence-rules-different-stories/sssssp9m"/>
      <lastmod>2026-11-02T17:03:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interpreting-inequalities-im-7-6-16-interactive-lesson/sssssp9j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interpreting-inequalities-im-7-6-16-interactive-lesson/sssssp9j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interpreting-inequalities-im-7-6-16-interactive-lesson/sssssp9j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interpreting-inequalities-im-7-6-16-interactive-lesson/sssssp9j"/>
      <lastmod>2026-11-02T10:36:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interpreting-inequalities-im-7-6-16-interactive-lesson/sssssp9j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interpreting-inequalities-im-7-6-16-interactive-lesson/sssssp9j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interpreting-inequalities-im-7-6-16-interactive-lesson/sssssp9j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interpreting-inequalities-im-7-6-16-interactive-lesson/sssssp9j"/>
      <lastmod>2026-11-02T10:36:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-exploration-triangle-parallelogram-law/sssssp9p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-exploration-triangle-parallelogram-law/sssssp9p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-exploration-triangle-parallelogram-law/sssssp9p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-exploration-triangle-parallelogram-law/sssssp9p"/>
      <lastmod>2026-11-02T00:23:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-exploration-triangle-parallelogram-law/sssssp9p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-exploration-triangle-parallelogram-law/sssssp9p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-exploration-triangle-parallelogram-law/sssssp9p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-exploration-triangle-parallelogram-law/sssssp9p"/>
      <lastmod>2026-11-02T00:23:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ambiguous-cosine-construction-triangle-solutions-and-hyperbolic-locus/sssssp9w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ambiguous-cosine-construction-triangle-solutions-and-hyperbolic-locus/sssssp9w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ambiguous-cosine-construction-triangle-solutions-and-hyperbolic-locus/sssssp9w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ambiguous-cosine-construction-triangle-solutions-and-hyperbolic-locus/sssssp9w"/>
      <lastmod>2026-11-01T19:04:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ambiguous-cosine-construction-triangle-solutions-and-hyperbolic-locus/sssssp9w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ambiguous-cosine-construction-triangle-solutions-and-hyperbolic-locus/sssssp9w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ambiguous-cosine-construction-triangle-solutions-and-hyperbolic-locus/sssssp9w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ambiguous-cosine-construction-triangle-solutions-and-hyperbolic-locus/sssssp9w"/>
      <lastmod>2026-11-01T19:04:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sextant-geometric-construction-and-angle-measurement-simulation/sssssp96</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sextant-geometric-construction-and-angle-measurement-simulation/sssssp96"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sextant-geometric-construction-and-angle-measurement-simulation/sssssp96"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sextant-geometric-construction-and-angle-measurement-simulation/sssssp96"/>
      <lastmod>2026-11-02T18:27:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sextant-geometric-construction-and-angle-measurement-simulation/sssssp96</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sextant-geometric-construction-and-angle-measurement-simulation/sssssp96"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sextant-geometric-construction-and-angle-measurement-simulation/sssssp96"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sextant-geometric-construction-and-angle-measurement-simulation/sssssp96"/>
      <lastmod>2026-11-02T18:27:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-from-net-of-hexagonal-prism/sssssp9g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-from-net-of-hexagonal-prism/sssssp9g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-from-net-of-hexagonal-prism/sssssp9g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-from-net-of-hexagonal-prism/sssssp9g"/>
      <lastmod>2026-11-01T22:03:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-from-net-of-hexagonal-prism/sssssp9g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-from-net-of-hexagonal-prism/sssssp9g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-from-net-of-hexagonal-prism/sssssp9g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-from-net-of-hexagonal-prism/sssssp9g"/>
      <lastmod>2026-11-01T22:03:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/locating-decimals-on-a-number-line-1/sssssp99</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locating-decimals-on-a-number-line-1/sssssp99"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locating-decimals-on-a-number-line-1/sssssp99"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locating-decimals-on-a-number-line-1/sssssp99"/>
      <lastmod>2026-11-02T00:26:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/locating-decimals-on-a-number-line-1/sssssp99</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locating-decimals-on-a-number-line-1/sssssp99"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locating-decimals-on-a-number-line-1/sssssp99"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locating-decimals-on-a-number-line-1/sssssp99"/>
      <lastmod>2026-11-02T00:26:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-orthocenter-and-midpoint-demonstration-in-triangles/sssssp9e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-orthocenter-and-midpoint-demonstration-in-triangles/sssssp9e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-orthocenter-and-midpoint-demonstration-in-triangles/sssssp9e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-orthocenter-and-midpoint-demonstration-in-triangles/sssssp9e"/>
      <lastmod>2026-11-02T16:55:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-orthocenter-and-midpoint-demonstration-in-triangles/sssssp9e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-orthocenter-and-midpoint-demonstration-in-triangles/sssssp9e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-orthocenter-and-midpoint-demonstration-in-triangles/sssssp9e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-orthocenter-and-midpoint-demonstration-in-triangles/sssssp9e"/>
      <lastmod>2026-11-02T16:55:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/computing-probabilities-from-tables/sssssp9v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/computing-probabilities-from-tables/sssssp9v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/computing-probabilities-from-tables/sssssp9v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/computing-probabilities-from-tables/sssssp9v"/>
      <lastmod>2026-11-02T17:08:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/computing-probabilities-from-tables/sssssp9v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/computing-probabilities-from-tables/sssssp9v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/computing-probabilities-from-tables/sssssp9v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/computing-probabilities-from-tables/sssssp9v"/>
      <lastmod>2026-11-02T17:08:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-geometric-construction-and-interactive-animation/sssssp94</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-geometric-construction-and-interactive-animation/sssssp94"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-geometric-construction-and-interactive-animation/sssssp94"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-geometric-construction-and-interactive-animation/sssssp94"/>
      <lastmod>2026-11-02T00:39:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-geometric-construction-and-interactive-animation/sssssp94</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-geometric-construction-and-interactive-animation/sssssp94"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-geometric-construction-and-interactive-animation/sssssp94"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-geometric-construction-and-interactive-animation/sssssp94"/>
      <lastmod>2026-11-02T00:39:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplying-unit-fractions/sssssp9l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-unit-fractions/sssssp9l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-unit-fractions/sssssp9l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-unit-fractions/sssssp9l"/>
      <lastmod>2026-11-02T18:05:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplying-unit-fractions/sssssp9l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-unit-fractions/sssssp9l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-unit-fractions/sssssp9l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-unit-fractions/sssssp9l"/>
      <lastmod>2026-11-02T18:05:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/set-theory-difference-slope-normal-distribution-dilation-kite/sssssp9y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/set-theory-difference-slope-normal-distribution-dilation-kite/sssssp9y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/set-theory-difference-slope-normal-distribution-dilation-kite/sssssp9y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/set-theory-difference-slope-normal-distribution-dilation-kite/sssssp9y"/>
      <lastmod>2026-11-01T23:16:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/set-theory-difference-slope-normal-distribution-dilation-kite/sssssp9y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/set-theory-difference-slope-normal-distribution-dilation-kite/sssssp9y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/set-theory-difference-slope-normal-distribution-dilation-kite/sssssp9y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/set-theory-difference-slope-normal-distribution-dilation-kite/sssssp9y"/>
      <lastmod>2026-11-01T23:16:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/problem-in-a-parallelogram/sssssp9a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/problem-in-a-parallelogram/sssssp9a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/problem-in-a-parallelogram/sssssp9a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/problem-in-a-parallelogram/sssssp9a"/>
      <lastmod>2026-11-02T09:14:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/problem-in-a-parallelogram/sssssp9a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/problem-in-a-parallelogram/sssssp9a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/problem-in-a-parallelogram/sssssp9a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/problem-in-a-parallelogram/sssssp9a"/>
      <lastmod>2026-11-02T09:14:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-2d-shapes/sssssp9c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-2d-shapes/sssssp9c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-2d-shapes/sssssp9c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-2d-shapes/sssssp9c"/>
      <lastmod>2026-11-02T17:41:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-2d-shapes/sssssp9c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-2d-shapes/sssssp9c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-2d-shapes/sssssp9c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-2d-shapes/sssssp9c"/>
      <lastmod>2026-11-02T17:41:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-fractions-by-lew-w-s/sssssp9r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-fractions-by-lew-w-s/sssssp9r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-fractions-by-lew-w-s/sssssp9r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-fractions-by-lew-w-s/sssssp9r"/>
      <lastmod>2026-11-02T16:31:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-fractions-by-lew-w-s/sssssp9r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-fractions-by-lew-w-s/sssssp9r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-fractions-by-lew-w-s/sssssp9r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-fractions-by-lew-w-s/sssssp9r"/>
      <lastmod>2026-11-02T16:31:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-construction-demo/sssssp9h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-construction-demo/sssssp9h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-construction-demo/sssssp9h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-construction-demo/sssssp9h"/>
      <lastmod>2026-11-02T02:36:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-construction-demo/sssssp9h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-construction-demo/sssssp9h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-construction-demo/sssssp9h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-construction-demo/sssssp9h"/>
      <lastmod>2026-11-02T02:36:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-geometric-sum-of-u-v-and-w/sssssp9t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-geometric-sum-of-u-v-and-w/sssssp9t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-geometric-sum-of-u-v-and-w/sssssp9t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-geometric-sum-of-u-v-and-w/sssssp9t"/>
      <lastmod>2026-11-01T19:34:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-geometric-sum-of-u-v-and-w/sssssp9t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-geometric-sum-of-u-v-and-w/sssssp9t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-geometric-sum-of-u-v-and-w/sssssp9t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-geometric-sum-of-u-v-and-w/sssssp9t"/>
      <lastmod>2026-11-01T19:34:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-cylinder-and-cone/sssssp9x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-cylinder-and-cone/sssssp9x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-cylinder-and-cone/sssssp9x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-cylinder-and-cone/sssssp9x"/>
      <lastmod>2026-11-02T00:51:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-cylinder-and-cone/sssssp9x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-cylinder-and-cone/sssssp9x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-cylinder-and-cone/sssssp9x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-cylinder-and-cone/sssssp9x"/>
      <lastmod>2026-11-02T00:51:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trefoil-knot-parametric-curve-and-geometric-construction/sssssp9i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trefoil-knot-parametric-curve-and-geometric-construction/sssssp9i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trefoil-knot-parametric-curve-and-geometric-construction/sssssp9i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trefoil-knot-parametric-curve-and-geometric-construction/sssssp9i"/>
      <lastmod>2026-11-02T18:50:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trefoil-knot-parametric-curve-and-geometric-construction/sssssp9i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trefoil-knot-parametric-curve-and-geometric-construction/sssssp9i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trefoil-knot-parametric-curve-and-geometric-construction/sssssp9i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trefoil-knot-parametric-curve-and-geometric-construction/sssssp9i"/>
      <lastmod>2026-11-02T18:50:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-prism-and-pyramid/sssssp9o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-prism-and-pyramid/sssssp9o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-prism-and-pyramid/sssssp9o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-prism-and-pyramid/sssssp9o"/>
      <lastmod>2026-11-02T16:33:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-prism-and-pyramid/sssssp9o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-prism-and-pyramid/sssssp9o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-prism-and-pyramid/sssssp9o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-prism-and-pyramid/sssssp9o"/>
      <lastmod>2026-11-02T16:33:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/how-close-to-the-midpoint/ssssspes</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-close-to-the-midpoint/ssssspes"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-close-to-the-midpoint/ssssspes"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-close-to-the-midpoint/ssssspes"/>
      <lastmod>2026-11-02T17:35:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/how-close-to-the-midpoint/ssssspes</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-close-to-the-midpoint/ssssspes"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-close-to-the-midpoint/ssssspes"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-close-to-the-midpoint/ssssspes"/>
      <lastmod>2026-11-02T17:35:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/classifying-quadrilaterals-by-ibrahim-el-hage/ssssspe7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/classifying-quadrilaterals-by-ibrahim-el-hage/ssssspe7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/classifying-quadrilaterals-by-ibrahim-el-hage/ssssspe7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/classifying-quadrilaterals-by-ibrahim-el-hage/ssssspe7"/>
      <lastmod>2026-11-02T09:09:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/classifying-quadrilaterals-by-ibrahim-el-hage/ssssspe7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/classifying-quadrilaterals-by-ibrahim-el-hage/ssssspe7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/classifying-quadrilaterals-by-ibrahim-el-hage/ssssspe7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/classifying-quadrilaterals-by-ibrahim-el-hage/ssssspe7"/>
      <lastmod>2026-11-02T09:09:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-quadrant-logic-demo/ssssspen</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-quadrant-logic-demo/ssssspen"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-quadrant-logic-demo/ssssspen"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-quadrant-logic-demo/ssssspen"/>
      <lastmod>2026-11-01T23:44:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-quadrant-logic-demo/ssssspen</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-quadrant-logic-demo/ssssspen"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-quadrant-logic-demo/ssssspen"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-quadrant-logic-demo/ssssspen"/>
      <lastmod>2026-11-01T23:44:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-trigonometry-demonstration/ssssspe2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-trigonometry-demonstration/ssssspe2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-trigonometry-demonstration/ssssspe2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-trigonometry-demonstration/ssssspe2"/>
      <lastmod>2026-11-01T19:00:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-trigonometry-demonstration/ssssspe2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-trigonometry-demonstration/ssssspe2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-trigonometry-demonstration/ssssspe2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-trigonometry-demonstration/ssssspe2"/>
      <lastmod>2026-11-01T19:00:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ssa-and-triangle-congruence/ssssspek</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ssa-and-triangle-congruence/ssssspek"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ssa-and-triangle-congruence/ssssspek"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ssa-and-triangle-congruence/ssssspek"/>
      <lastmod>2026-11-01T21:28:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ssa-and-triangle-congruence/ssssspek</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ssa-and-triangle-congruence/ssssspek"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ssa-and-triangle-congruence/ssssspek"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ssa-and-triangle-congruence/ssssspek"/>
      <lastmod>2026-11-01T21:28:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/folding-test-lines-of-reflection-symmetry/ssssspez</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/folding-test-lines-of-reflection-symmetry/ssssspez"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/folding-test-lines-of-reflection-symmetry/ssssspez"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/folding-test-lines-of-reflection-symmetry/ssssspez"/>
      <lastmod>2026-11-01T21:14:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/folding-test-lines-of-reflection-symmetry/ssssspez</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/folding-test-lines-of-reflection-symmetry/ssssspez"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/folding-test-lines-of-reflection-symmetry/ssssspez"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/folding-test-lines-of-reflection-symmetry/ssssspez"/>
      <lastmod>2026-11-01T21:14:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-cubic-equations/ssssspe0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-cubic-equations/ssssspe0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-cubic-equations/ssssspe0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-cubic-equations/ssssspe0"/>
      <lastmod>2026-11-02T16:59:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-cubic-equations/ssssspe0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-cubic-equations/ssssspe0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-cubic-equations/ssssspe0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-cubic-equations/ssssspe0"/>
      <lastmod>2026-11-02T16:59:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilate-a-prism-about-its-base/sssssped</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilate-a-prism-about-its-base/sssssped"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilate-a-prism-about-its-base/sssssped"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilate-a-prism-about-its-base/sssssped"/>
      <lastmod>2026-11-02T02:23:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilate-a-prism-about-its-base/sssssped</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilate-a-prism-about-its-base/sssssped"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilate-a-prism-about-its-base/sssssped"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilate-a-prism-about-its-base/sssssped"/>
      <lastmod>2026-11-02T02:23:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construct-a-rectangle/ssssspef</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-a-rectangle/ssssspef"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-a-rectangle/ssssspef"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-a-rectangle/ssssspef"/>
      <lastmod>2026-11-01T23:46:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construct-a-rectangle/ssssspef</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-a-rectangle/ssssspef"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-a-rectangle/ssssspef"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-a-rectangle/ssssspef"/>
      <lastmod>2026-11-01T23:46:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/factoring-area-model/ssssspe8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factoring-area-model/ssssspe8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factoring-area-model/ssssspe8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factoring-area-model/ssssspe8"/>
      <lastmod>2026-11-01T20:55:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/factoring-area-model/ssssspe8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factoring-area-model/ssssspe8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factoring-area-model/ssssspe8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factoring-area-model/ssssspe8"/>
      <lastmod>2026-11-01T20:55:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-and-refraction-by-michael-proudman/ssssspeu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-and-refraction-by-michael-proudman/ssssspeu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-and-refraction-by-michael-proudman/ssssspeu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-and-refraction-by-michael-proudman/ssssspeu"/>
      <lastmod>2026-11-02T02:18:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-and-refraction-by-michael-proudman/ssssspeu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-and-refraction-by-michael-proudman/ssssspeu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-and-refraction-by-michael-proudman/ssssspeu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-and-refraction-by-michael-proudman/ssssspeu"/>
      <lastmod>2026-11-02T02:18:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-lines/ssssspe5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-lines/ssssspe5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-lines/ssssspe5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-lines/ssssspe5"/>
      <lastmod>2026-11-02T02:42:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-lines/ssssspe5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-lines/ssssspe5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-lines/ssssspe5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-lines/ssssspe5"/>
      <lastmod>2026-11-02T02:42:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/create-a-function-calculus/ssssspeb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-a-function-calculus/ssssspeb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-a-function-calculus/ssssspeb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-a-function-calculus/ssssspeb"/>
      <lastmod>2026-11-01T21:34:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/create-a-function-calculus/ssssspeb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-a-function-calculus/ssssspeb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-a-function-calculus/ssssspeb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-a-function-calculus/ssssspeb"/>
      <lastmod>2026-11-01T21:34:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modifiable-solid-with-equilateral-triangular-cross-sections/ssssspe3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modifiable-solid-with-equilateral-triangular-cross-sections/ssssspe3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modifiable-solid-with-equilateral-triangular-cross-sections/ssssspe3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modifiable-solid-with-equilateral-triangular-cross-sections/ssssspe3"/>
      <lastmod>2026-11-02T08:30:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modifiable-solid-with-equilateral-triangular-cross-sections/ssssspe3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modifiable-solid-with-equilateral-triangular-cross-sections/ssssspe3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modifiable-solid-with-equilateral-triangular-cross-sections/ssssspe3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modifiable-solid-with-equilateral-triangular-cross-sections/ssssspe3"/>
      <lastmod>2026-11-02T08:30:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/columns-and-unit-conversions/ssssspeq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/columns-and-unit-conversions/ssssspeq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/columns-and-unit-conversions/ssssspeq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/columns-and-unit-conversions/ssssspeq"/>
      <lastmod>2026-11-01T20:53:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/columns-and-unit-conversions/ssssspeq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/columns-and-unit-conversions/ssssspeq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/columns-and-unit-conversions/ssssspeq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/columns-and-unit-conversions/ssssspeq"/>
      <lastmod>2026-11-01T20:53:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angles-through-circles/ssssspe1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-through-circles/ssssspe1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-through-circles/ssssspe1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-through-circles/ssssspe1"/>
      <lastmod>2026-11-02T12:46:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angles-through-circles/ssssspe1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-through-circles/ssssspe1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-through-circles/ssssspe1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-through-circles/ssssspe1"/>
      <lastmod>2026-11-02T12:46:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-classification-investigation/ssssspem</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-classification-investigation/ssssspem"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-classification-investigation/ssssspem"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-classification-investigation/ssssspem"/>
      <lastmod>2026-11-01T23:46:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-classification-investigation/ssssspem</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-classification-investigation/ssssspem"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-classification-investigation/ssssspem"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-classification-investigation/ssssspem"/>
      <lastmod>2026-11-01T23:46:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/double-number-line-percent-change/ssssspej</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-number-line-percent-change/ssssspej"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-number-line-percent-change/ssssspej"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-number-line-percent-change/ssssspej"/>
      <lastmod>2026-11-02T13:30:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/double-number-line-percent-change/ssssspej</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-number-line-percent-change/ssssspej"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-number-line-percent-change/ssssspej"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-number-line-percent-change/ssssspej"/>
      <lastmod>2026-11-02T13:30:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-demonstration-of-slanted-cone/ssssspep</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-slanted-cone/ssssspep"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-slanted-cone/ssssspep"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-slanted-cone/ssssspep"/>
      <lastmod>2026-11-02T11:45:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-demonstration-of-slanted-cone/ssssspep</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-slanted-cone/ssssspep"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-slanted-cone/ssssspep"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-slanted-cone/ssssspep"/>
      <lastmod>2026-11-02T11:45:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-riemann-integral-mapping-diagram-and-graph/ssssspew</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-riemann-integral-mapping-diagram-and-graph/ssssspew"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-riemann-integral-mapping-diagram-and-graph/ssssspew"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-riemann-integral-mapping-diagram-and-graph/ssssspew"/>
      <lastmod>2026-11-02T16:34:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-riemann-integral-mapping-diagram-and-graph/ssssspew</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-riemann-integral-mapping-diagram-and-graph/ssssspew"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-riemann-integral-mapping-diagram-and-graph/ssssspew"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-riemann-integral-mapping-diagram-and-graph/ssssspew"/>
      <lastmod>2026-11-02T16:34:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equal-areas-in-ellipse/ssssspe6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equal-areas-in-ellipse/ssssspe6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equal-areas-in-ellipse/ssssspe6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equal-areas-in-ellipse/ssssspe6"/>
      <lastmod>2026-11-02T02:33:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equal-areas-in-ellipse/ssssspe6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equal-areas-in-ellipse/ssssspe6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equal-areas-in-ellipse/ssssspe6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equal-areas-in-ellipse/ssssspe6"/>
      <lastmod>2026-11-02T02:33:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parametric-curves-and-function-graphs/ssssspeg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-curves-and-function-graphs/ssssspeg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-curves-and-function-graphs/ssssspeg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-curves-and-function-graphs/ssssspeg"/>
      <lastmod>2026-11-01T23:30:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parametric-curves-and-function-graphs/ssssspeg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-curves-and-function-graphs/ssssspeg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-curves-and-function-graphs/ssssspeg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-curves-and-function-graphs/ssssspeg"/>
      <lastmod>2026-11-01T23:30:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-exploration-again/ssssspe9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-exploration-again/ssssspe9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-exploration-again/ssssspe9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-exploration-again/ssssspe9"/>
      <lastmod>2026-11-02T17:11:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-exploration-again/ssssspe9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-exploration-again/ssssspe9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-exploration-again/ssssspe9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-exploration-again/ssssspe9"/>
      <lastmod>2026-11-02T17:11:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/centroid-pie-chart-with-linear-equations/ssssspee</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/centroid-pie-chart-with-linear-equations/ssssspee"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/centroid-pie-chart-with-linear-equations/ssssspee"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/centroid-pie-chart-with-linear-equations/ssssspee"/>
      <lastmod>2026-11-02T18:55:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/centroid-pie-chart-with-linear-equations/ssssspee</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/centroid-pie-chart-with-linear-equations/ssssspee"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/centroid-pie-chart-with-linear-equations/ssssspee"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/centroid-pie-chart-with-linear-equations/ssssspee"/>
      <lastmod>2026-11-02T18:55:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tape-roll-3d-modeling/ssssspev</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tape-roll-3d-modeling/ssssspev"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tape-roll-3d-modeling/ssssspev"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tape-roll-3d-modeling/ssssspev"/>
      <lastmod>2026-11-01T20:54:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tape-roll-3d-modeling/ssssspev</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tape-roll-3d-modeling/ssssspev"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tape-roll-3d-modeling/ssssspev"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tape-roll-3d-modeling/ssssspev"/>
      <lastmod>2026-11-01T20:54:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplying-fractions-open-middle-problem/ssssspe4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-fractions-open-middle-problem/ssssspe4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-fractions-open-middle-problem/ssssspe4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-fractions-open-middle-problem/ssssspe4"/>
      <lastmod>2026-11-01T21:10:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplying-fractions-open-middle-problem/ssssspe4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-fractions-open-middle-problem/ssssspe4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-fractions-open-middle-problem/ssssspe4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-fractions-open-middle-problem/ssssspe4"/>
      <lastmod>2026-11-01T21:10:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/weird-function-demonstration/ssssspel</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/weird-function-demonstration/ssssspel"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/weird-function-demonstration/ssssspel"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/weird-function-demonstration/ssssspel"/>
      <lastmod>2026-11-01T23:29:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/weird-function-demonstration/ssssspel</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/weird-function-demonstration/ssssspel"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/weird-function-demonstration/ssssspel"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/weird-function-demonstration/ssssspel"/>
      <lastmod>2026-11-01T23:29:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadrilateral-constructions/ssssspey</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-constructions/ssssspey"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-constructions/ssssspey"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-constructions/ssssspey"/>
      <lastmod>2026-11-02T18:20:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadrilateral-constructions/ssssspey</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-constructions/ssssspey"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-constructions/ssssspey"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-constructions/ssssspey"/>
      <lastmod>2026-11-02T18:20:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-and-construction-of-an-equilateral-triangle/ssssspea</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-and-construction-of-an-equilateral-triangle/ssssspea"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-and-construction-of-an-equilateral-triangle/ssssspea"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-and-construction-of-an-equilateral-triangle/ssssspea"/>
      <lastmod>2026-11-02T18:34:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-and-construction-of-an-equilateral-triangle/ssssspea</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-and-construction-of-an-equilateral-triangle/ssssspea"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-and-construction-of-an-equilateral-triangle/ssssspea"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-and-construction-of-an-equilateral-triangle/ssssspea"/>
      <lastmod>2026-11-02T18:34:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3-1-fundamental-theorem-of-calculus-tracking-bank-account-balance/ssssspec</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3-1-fundamental-theorem-of-calculus-tracking-bank-account-balance/ssssspec"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3-1-fundamental-theorem-of-calculus-tracking-bank-account-balance/ssssspec"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3-1-fundamental-theorem-of-calculus-tracking-bank-account-balance/ssssspec"/>
      <lastmod>2026-11-02T12:19:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3-1-fundamental-theorem-of-calculus-tracking-bank-account-balance/ssssspec</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3-1-fundamental-theorem-of-calculus-tracking-bank-account-balance/ssssspec"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3-1-fundamental-theorem-of-calculus-tracking-bank-account-balance/ssssspec"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3-1-fundamental-theorem-of-calculus-tracking-bank-account-balance/ssssspec"/>
      <lastmod>2026-11-02T12:19:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphs-of-motion/sssssper</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphs-of-motion/sssssper"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphs-of-motion/sssssper"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphs-of-motion/sssssper"/>
      <lastmod>2026-11-02T10:47:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphs-of-motion/sssssper</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphs-of-motion/sssssper"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphs-of-motion/sssssper"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphs-of-motion/sssssper"/>
      <lastmod>2026-11-02T10:47:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/aa-similarity-theorem-proof-using-transformational-geometry/ssssspeh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/aa-similarity-theorem-proof-using-transformational-geometry/ssssspeh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/aa-similarity-theorem-proof-using-transformational-geometry/ssssspeh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/aa-similarity-theorem-proof-using-transformational-geometry/ssssspeh"/>
      <lastmod>2026-11-02T00:47:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/aa-similarity-theorem-proof-using-transformational-geometry/ssssspeh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/aa-similarity-theorem-proof-using-transformational-geometry/ssssspeh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/aa-similarity-theorem-proof-using-transformational-geometry/ssssspeh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/aa-similarity-theorem-proof-using-transformational-geometry/ssssspeh"/>
      <lastmod>2026-11-02T00:47:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/from-circles-to-spheres/ssssspet</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/from-circles-to-spheres/ssssspet"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/from-circles-to-spheres/ssssspet"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/from-circles-to-spheres/ssssspet"/>
      <lastmod>2026-11-01T20:50:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/from-circles-to-spheres/ssssspet</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/from-circles-to-spheres/ssssspet"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/from-circles-to-spheres/ssssspet"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/from-circles-to-spheres/ssssspet"/>
      <lastmod>2026-11-01T20:50:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/center-of-dilation-demo-by-sarah-clement/ssssspex</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/center-of-dilation-demo-by-sarah-clement/ssssspex"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/center-of-dilation-demo-by-sarah-clement/ssssspex"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/center-of-dilation-demo-by-sarah-clement/ssssspex"/>
      <lastmod>2026-11-02T10:38:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/center-of-dilation-demo-by-sarah-clement/ssssspex</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/center-of-dilation-demo-by-sarah-clement/ssssspex"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/center-of-dilation-demo-by-sarah-clement/ssssspex"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/center-of-dilation-demo-by-sarah-clement/ssssspex"/>
      <lastmod>2026-11-02T10:38:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-and-cone-section-demonstration/ssssspei</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-and-cone-section-demonstration/ssssspei"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-and-cone-section-demonstration/ssssspei"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-and-cone-section-demonstration/ssssspei"/>
      <lastmod>2026-11-01T20:51:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-and-cone-section-demonstration/ssssspei</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-and-cone-section-demonstration/ssssspei"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-and-cone-section-demonstration/ssssspei"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-and-cone-section-demonstration/ssssspei"/>
      <lastmod>2026-11-01T20:51:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-construction-by-mpayne2018/ssssspeo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-construction-by-mpayne2018/ssssspeo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-construction-by-mpayne2018/ssssspeo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-construction-by-mpayne2018/ssssspeo"/>
      <lastmod>2026-11-02T17:15:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-construction-by-mpayne2018/ssssspeo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-construction-by-mpayne2018/ssssspeo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-construction-by-mpayne2018/ssssspeo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-construction-by-mpayne2018/ssssspeo"/>
      <lastmod>2026-11-02T17:15:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-polygon-surface/ssssspvs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-polygon-surface/ssssspvs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-polygon-surface/ssssspvs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-polygon-surface/ssssspvs"/>
      <lastmod>2026-11-02T12:28:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-polygon-surface/ssssspvs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-polygon-surface/ssssspvs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-polygon-surface/ssssspvs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-polygon-surface/ssssspvs"/>
      <lastmod>2026-11-02T12:28:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/elliptic-plane-half-sphere-to-m-bius-strip/ssssspv7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/elliptic-plane-half-sphere-to-m-bius-strip/ssssspv7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/elliptic-plane-half-sphere-to-m-bius-strip/ssssspv7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/elliptic-plane-half-sphere-to-m-bius-strip/ssssspv7"/>
      <lastmod>2026-11-01T20:47:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/elliptic-plane-half-sphere-to-m-bius-strip/ssssspv7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/elliptic-plane-half-sphere-to-m-bius-strip/ssssspv7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/elliptic-plane-half-sphere-to-m-bius-strip/ssssspv7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/elliptic-plane-half-sphere-to-m-bius-strip/ssssspv7"/>
      <lastmod>2026-11-01T20:47:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wallace-simson-line-and-deltoid/ssssspvn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wallace-simson-line-and-deltoid/ssssspvn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wallace-simson-line-and-deltoid/ssssspvn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wallace-simson-line-and-deltoid/ssssspvn"/>
      <lastmod>2026-11-02T16:48:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wallace-simson-line-and-deltoid/ssssspvn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wallace-simson-line-and-deltoid/ssssspvn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wallace-simson-line-and-deltoid/ssssspvn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wallace-simson-line-and-deltoid/ssssspvn"/>
      <lastmod>2026-11-02T16:48:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-box-demonstration/ssssspv2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-box-demonstration/ssssspv2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-box-demonstration/ssssspv2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-box-demonstration/ssssspv2"/>
      <lastmod>2026-11-02T18:39:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-box-demonstration/ssssspv2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-box-demonstration/ssssspv2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-box-demonstration/ssssspv2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-box-demonstration/ssssspv2"/>
      <lastmod>2026-11-02T18:39:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-mckendry-marano/ssssspvk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-mckendry-marano/ssssspvk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-mckendry-marano/ssssspvk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-mckendry-marano/ssssspvk"/>
      <lastmod>2026-11-02T03:17:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-mckendry-marano/ssssspvk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-mckendry-marano/ssssspvk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-mckendry-marano/ssssspvk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-mckendry-marano/ssssspvk"/>
      <lastmod>2026-11-02T03:17:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-surface-area-net/ssssspvz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-surface-area-net/ssssspvz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-surface-area-net/ssssspvz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-surface-area-net/ssssspvz"/>
      <lastmod>2026-11-02T18:13:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-surface-area-net/ssssspvz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-surface-area-net/ssssspvz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-surface-area-net/ssssspvz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-surface-area-net/ssssspvz"/>
      <lastmod>2026-11-02T18:13:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplying-complex-numbers-on-the-complex-plane/ssssspv0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-complex-numbers-on-the-complex-plane/ssssspv0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-complex-numbers-on-the-complex-plane/ssssspv0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-complex-numbers-on-the-complex-plane/ssssspv0"/>
      <lastmod>2026-11-02T00:33:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplying-complex-numbers-on-the-complex-plane/ssssspv0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-complex-numbers-on-the-complex-plane/ssssspv0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-complex-numbers-on-the-complex-plane/ssssspv0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-complex-numbers-on-the-complex-plane/ssssspv0"/>
      <lastmod>2026-11-02T00:33:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/and-gate/ssssspvd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/and-gate/ssssspvd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/and-gate/ssssspvd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/and-gate/ssssspvd"/>
      <lastmod>2026-11-01T21:02:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/and-gate/ssssspvd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/and-gate/ssssspvd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/and-gate/ssssspvd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/and-gate/ssssspvd"/>
      <lastmod>2026-11-01T21:02:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/partial-derivative-concept-demo/ssssspvf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-derivative-concept-demo/ssssspvf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-derivative-concept-demo/ssssspvf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-derivative-concept-demo/ssssspvf"/>
      <lastmod>2026-11-02T09:34:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/partial-derivative-concept-demo/ssssspvf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-derivative-concept-demo/ssssspvf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-derivative-concept-demo/ssssspvf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-derivative-concept-demo/ssssspvf"/>
      <lastmod>2026-11-02T09:34:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solve-equations-with-variables-on-both-sides/ssssspv8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solve-equations-with-variables-on-both-sides/ssssspv8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solve-equations-with-variables-on-both-sides/ssssspv8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solve-equations-with-variables-on-both-sides/ssssspv8"/>
      <lastmod>2026-11-02T18:04:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solve-equations-with-variables-on-both-sides/ssssspv8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solve-equations-with-variables-on-both-sides/ssssspv8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solve-equations-with-variables-on-both-sides/ssssspv8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solve-equations-with-variables-on-both-sides/ssssspv8"/>
      <lastmod>2026-11-02T18:04:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/eccentricity-and-directrix-of-an-ellipse/ssssspvu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eccentricity-and-directrix-of-an-ellipse/ssssspvu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eccentricity-and-directrix-of-an-ellipse/ssssspvu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eccentricity-and-directrix-of-an-ellipse/ssssspvu"/>
      <lastmod>2026-11-02T15:19:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/eccentricity-and-directrix-of-an-ellipse/ssssspvu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eccentricity-and-directrix-of-an-ellipse/ssssspvu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eccentricity-and-directrix-of-an-ellipse/ssssspvu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eccentricity-and-directrix-of-an-ellipse/ssssspvu"/>
      <lastmod>2026-11-02T15:19:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-and-stochastic-process-demo/ssssspv5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-and-stochastic-process-demo/ssssspv5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-and-stochastic-process-demo/ssssspv5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-and-stochastic-process-demo/ssssspv5"/>
      <lastmod>2026-11-02T18:10:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-and-stochastic-process-demo/ssssspv5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-and-stochastic-process-demo/ssssspv5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-and-stochastic-process-demo/ssssspv5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-and-stochastic-process-demo/ssssspv5"/>
      <lastmod>2026-11-02T18:10:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/imagine-how-many-angles-are-there/ssssspvb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/imagine-how-many-angles-are-there/ssssspvb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/imagine-how-many-angles-are-there/ssssspvb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/imagine-how-many-angles-are-there/ssssspvb"/>
      <lastmod>2026-11-01T23:41:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/imagine-how-many-angles-are-there/ssssspvb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/imagine-how-many-angles-are-there/ssssspvb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/imagine-how-many-angles-are-there/ssssspvb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/imagine-how-many-angles-are-there/ssssspvb"/>
      <lastmod>2026-11-01T23:41:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/alternate-interior-angles-of-parallel-lines/ssssspv3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-interior-angles-of-parallel-lines/ssssspv3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-interior-angles-of-parallel-lines/ssssspv3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-interior-angles-of-parallel-lines/ssssspv3"/>
      <lastmod>2026-11-02T00:25:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/alternate-interior-angles-of-parallel-lines/ssssspv3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-interior-angles-of-parallel-lines/ssssspv3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-interior-angles-of-parallel-lines/ssssspv3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-interior-angles-of-parallel-lines/ssssspv3"/>
      <lastmod>2026-11-02T00:25:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-and-translation-demonstrating-polygon-transformations-in-3d/ssssspvq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-and-translation-demonstrating-polygon-transformations-in-3d/ssssspvq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-and-translation-demonstrating-polygon-transformations-in-3d/ssssspvq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-and-translation-demonstrating-polygon-transformations-in-3d/ssssspvq"/>
      <lastmod>2026-11-02T09:11:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-and-translation-demonstrating-polygon-transformations-in-3d/ssssspvq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-and-translation-demonstrating-polygon-transformations-in-3d/ssssspvq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-and-translation-demonstrating-polygon-transformations-in-3d/ssssspvq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-and-translation-demonstrating-polygon-transformations-in-3d/ssssspvq"/>
      <lastmod>2026-11-02T09:11:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivation-of-sine-function/ssssspv1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivation-of-sine-function/ssssspv1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivation-of-sine-function/ssssspv1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivation-of-sine-function/ssssspv1"/>
      <lastmod>2026-11-01T22:07:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivation-of-sine-function/ssssspv1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivation-of-sine-function/ssssspv1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivation-of-sine-function/ssssspv1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivation-of-sine-function/ssssspv1"/>
      <lastmod>2026-11-01T22:07:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-euclid-s-algorithm-by-david-wees/ssssspvm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-euclid-s-algorithm-by-david-wees/ssssspvm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-euclid-s-algorithm-by-david-wees/ssssspvm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-euclid-s-algorithm-by-david-wees/ssssspvm"/>
      <lastmod>2026-11-01T21:23:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-euclid-s-algorithm-by-david-wees/ssssspvm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-euclid-s-algorithm-by-david-wees/ssssspvm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-euclid-s-algorithm-by-david-wees/ssssspvm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-euclid-s-algorithm-by-david-wees/ssssspvm"/>
      <lastmod>2026-11-01T21:23:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definition-of-ellipse/ssssspvj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-of-ellipse/ssssspvj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-of-ellipse/ssssspvj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-of-ellipse/ssssspvj"/>
      <lastmod>2026-11-02T18:18:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definition-of-ellipse/ssssspvj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-of-ellipse/ssssspvj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-of-ellipse/ssssspvj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-of-ellipse/ssssspvj"/>
      <lastmod>2026-11-02T18:18:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/implicit-surface/ssssspvp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/implicit-surface/ssssspvp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/implicit-surface/ssssspvp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/implicit-surface/ssssspvp"/>
      <lastmod>2026-11-02T10:44:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/implicit-surface/ssssspvp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/implicit-surface/ssssspvp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/implicit-surface/ssssspvp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/implicit-surface/ssssspvp"/>
      <lastmod>2026-11-02T10:44:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-angle-addition/ssssspvw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-angle-addition/ssssspvw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-angle-addition/ssssspvw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-angle-addition/ssssspvw"/>
      <lastmod>2026-11-02T18:28:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-angle-addition/ssssspvw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-angle-addition/ssssspvw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-angle-addition/ssssspvw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-angle-addition/ssssspvw"/>
      <lastmod>2026-11-02T18:28:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/special-right-triangles/ssssspv6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-right-triangles/ssssspv6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-right-triangles/ssssspv6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-right-triangles/ssssspv6"/>
      <lastmod>2026-11-02T07:16:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/special-right-triangles/ssssspv6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/special-right-triangles/ssssspv6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/special-right-triangles/ssssspv6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/special-right-triangles/ssssspv6"/>
      <lastmod>2026-11-02T07:16:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-magic-sum/ssssspvg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-magic-sum/ssssspvg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-magic-sum/ssssspvg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-magic-sum/ssssspvg"/>
      <lastmod>2026-11-01T23:10:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-magic-sum/ssssspvg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-magic-sum/ssssspvg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-magic-sum/ssssspvg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-magic-sum/ssssspvg"/>
      <lastmod>2026-11-01T23:10:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/voronoi-on-sphere/ssssspv9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/voronoi-on-sphere/ssssspv9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/voronoi-on-sphere/ssssspv9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/voronoi-on-sphere/ssssspv9"/>
      <lastmod>2026-11-01T19:31:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/voronoi-on-sphere/ssssspv9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/voronoi-on-sphere/ssssspv9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/voronoi-on-sphere/ssssspv9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/voronoi-on-sphere/ssssspv9"/>
      <lastmod>2026-11-01T19:31:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/icosahedral-triangular-prisms/ssssspve</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/icosahedral-triangular-prisms/ssssspve"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/icosahedral-triangular-prisms/ssssspve"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/icosahedral-triangular-prisms/ssssspve"/>
      <lastmod>2026-11-02T18:33:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/icosahedral-triangular-prisms/ssssspve</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/icosahedral-triangular-prisms/ssssspve"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/icosahedral-triangular-prisms/ssssspve"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/icosahedral-triangular-prisms/ssssspve"/>
      <lastmod>2026-11-02T18:33:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/focus-directrix-parabola-by-morjoh86/ssssspvv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/focus-directrix-parabola-by-morjoh86/ssssspvv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/focus-directrix-parabola-by-morjoh86/ssssspvv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/focus-directrix-parabola-by-morjoh86/ssssspvv"/>
      <lastmod>2026-11-01T23:33:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/focus-directrix-parabola-by-morjoh86/ssssspvv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/focus-directrix-parabola-by-morjoh86/ssssspvv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/focus-directrix-parabola-by-morjoh86/ssssspvv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/focus-directrix-parabola-by-morjoh86/ssssspvv"/>
      <lastmod>2026-11-01T23:33:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rolling-triangles-geometric-construction-and-trigonometry/ssssspv4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rolling-triangles-geometric-construction-and-trigonometry/ssssspv4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rolling-triangles-geometric-construction-and-trigonometry/ssssspv4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rolling-triangles-geometric-construction-and-trigonometry/ssssspv4"/>
      <lastmod>2026-11-02T00:17:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rolling-triangles-geometric-construction-and-trigonometry/ssssspv4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rolling-triangles-geometric-construction-and-trigonometry/ssssspv4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rolling-triangles-geometric-construction-and-trigonometry/ssssspv4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rolling-triangles-geometric-construction-and-trigonometry/ssssspv4"/>
      <lastmod>2026-11-02T00:17:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/partial-fractions-practice/ssssspvl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-fractions-practice/ssssspvl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-fractions-practice/ssssspvl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-fractions-practice/ssssspvl"/>
      <lastmod>2026-11-01T21:32:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/partial-fractions-practice/ssssspvl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-fractions-practice/ssssspvl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-fractions-practice/ssssspvl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-fractions-practice/ssssspvl"/>
      <lastmod>2026-11-01T21:32:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/distance-from-origin-to-plane/ssssspvy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-from-origin-to-plane/ssssspvy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-from-origin-to-plane/ssssspvy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-from-origin-to-plane/ssssspvy"/>
      <lastmod>2026-11-01T21:26:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/distance-from-origin-to-plane/ssssspvy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-from-origin-to-plane/ssssspvy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-from-origin-to-plane/ssssspvy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-from-origin-to-plane/ssssspvy"/>
      <lastmod>2026-11-01T21:26:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelograms-step-i/ssssspva</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelograms-step-i/ssssspva"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelograms-step-i/ssssspva"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelograms-step-i/ssssspva"/>
      <lastmod>2026-11-01T19:24:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelograms-step-i/ssssspva</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelograms-step-i/ssssspva"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelograms-step-i/ssssspva"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelograms-step-i/ssssspva"/>
      <lastmod>2026-11-01T19:24:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiply-by-6-with-dice-interactive-random-polygons-and-dilation/ssssspvc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiply-by-6-with-dice-interactive-random-polygons-and-dilation/ssssspvc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiply-by-6-with-dice-interactive-random-polygons-and-dilation/ssssspvc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiply-by-6-with-dice-interactive-random-polygons-and-dilation/ssssspvc"/>
      <lastmod>2026-11-01T19:20:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiply-by-6-with-dice-interactive-random-polygons-and-dilation/ssssspvc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiply-by-6-with-dice-interactive-random-polygons-and-dilation/ssssspvc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiply-by-6-with-dice-interactive-random-polygons-and-dilation/ssssspvc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiply-by-6-with-dice-interactive-random-polygons-and-dilation/ssssspvc"/>
      <lastmod>2026-11-01T19:20:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-volume-calculation-visualization/ssssspvr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-visualization/ssssspvr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-volume-calculation-visualization/ssssspvr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-visualization/ssssspvr"/>
      <lastmod>2026-11-02T03:04:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-volume-calculation-visualization/ssssspvr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-visualization/ssssspvr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-volume-calculation-visualization/ssssspvr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-visualization/ssssspvr"/>
      <lastmod>2026-11-02T03:04:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/number-cross-puzzle/ssssspvh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-cross-puzzle/ssssspvh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-cross-puzzle/ssssspvh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-cross-puzzle/ssssspvh"/>
      <lastmod>2026-11-01T23:12:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/number-cross-puzzle/ssssspvh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-cross-puzzle/ssssspvh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-cross-puzzle/ssssspvh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-cross-puzzle/ssssspvh"/>
      <lastmod>2026-11-01T23:12:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-simulation-marble-drawing-and-frequency-distribution/ssssspvt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-simulation-marble-drawing-and-frequency-distribution/ssssspvt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-simulation-marble-drawing-and-frequency-distribution/ssssspvt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-simulation-marble-drawing-and-frequency-distribution/ssssspvt"/>
      <lastmod>2026-11-02T08:29:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-simulation-marble-drawing-and-frequency-distribution/ssssspvt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-simulation-marble-drawing-and-frequency-distribution/ssssspvt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-simulation-marble-drawing-and-frequency-distribution/ssssspvt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-simulation-marble-drawing-and-frequency-distribution/ssssspvt"/>
      <lastmod>2026-11-02T08:29:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perimeter-area-and-similarity-transformations/ssssspvx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-area-and-similarity-transformations/ssssspvx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-area-and-similarity-transformations/ssssspvx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-area-and-similarity-transformations/ssssspvx"/>
      <lastmod>2026-11-02T16:43:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perimeter-area-and-similarity-transformations/ssssspvx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-area-and-similarity-transformations/ssssspvx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-area-and-similarity-transformations/ssssspvx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-area-and-similarity-transformations/ssssspvx"/>
      <lastmod>2026-11-02T16:43:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/decimal-exponents-demo/ssssspvi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-exponents-demo/ssssspvi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-exponents-demo/ssssspvi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-exponents-demo/ssssspvi"/>
      <lastmod>2026-11-02T17:37:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/decimal-exponents-demo/ssssspvi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-exponents-demo/ssssspvi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-exponents-demo/ssssspvi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-exponents-demo/ssssspvi"/>
      <lastmod>2026-11-02T17:37:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modeling-nature-shells/ssssspvo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modeling-nature-shells/ssssspvo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modeling-nature-shells/ssssspvo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modeling-nature-shells/ssssspvo"/>
      <lastmod>2026-11-01T23:56:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modeling-nature-shells/ssssspvo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modeling-nature-shells/ssssspvo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modeling-nature-shells/ssssspvo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modeling-nature-shells/ssssspvo"/>
      <lastmod>2026-11-01T23:56:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-activity/sssssp4s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-activity/sssssp4s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-activity/sssssp4s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-activity/sssssp4s"/>
      <lastmod>2026-11-02T18:28:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-activity/sssssp4s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-activity/sssssp4s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-activity/sssssp4s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-activity/sssssp4s"/>
      <lastmod>2026-11-02T18:28:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-of-revolution-with-helical-cross-section/sssssp47</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-with-helical-cross-section/sssssp47"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-with-helical-cross-section/sssssp47"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-with-helical-cross-section/sssssp47"/>
      <lastmod>2026-11-01T21:38:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-of-revolution-with-helical-cross-section/sssssp47</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-with-helical-cross-section/sssssp47"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-with-helical-cross-section/sssssp47"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-with-helical-cross-section/sssssp47"/>
      <lastmod>2026-11-01T21:38:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/change-of-basis-exploration/sssssp4n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/change-of-basis-exploration/sssssp4n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/change-of-basis-exploration/sssssp4n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/change-of-basis-exploration/sssssp4n"/>
      <lastmod>2026-11-01T21:19:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/change-of-basis-exploration/sssssp4n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/change-of-basis-exploration/sssssp4n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/change-of-basis-exploration/sssssp4n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/change-of-basis-exploration/sssssp4n"/>
      <lastmod>2026-11-01T21:19:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-quadrilateral-angle-sums-by-john-williams/sssssp42</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-quadrilateral-angle-sums-by-john-williams/sssssp42"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-quadrilateral-angle-sums-by-john-williams/sssssp42"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-quadrilateral-angle-sums-by-john-williams/sssssp42"/>
      <lastmod>2026-11-02T15:53:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-quadrilateral-angle-sums-by-john-williams/sssssp42</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-quadrilateral-angle-sums-by-john-williams/sssssp42"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-quadrilateral-angle-sums-by-john-williams/sssssp42"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-quadrilateral-angle-sums-by-john-williams/sssssp42"/>
      <lastmod>2026-11-02T15:53:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perimeter-of-irregular-shapes-by-kong-chan-2/sssssp4k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-of-irregular-shapes-by-kong-chan-2/sssssp4k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-of-irregular-shapes-by-kong-chan-2/sssssp4k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-of-irregular-shapes-by-kong-chan-2/sssssp4k"/>
      <lastmod>2026-11-02T17:40:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perimeter-of-irregular-shapes-by-kong-chan-2/sssssp4k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-of-irregular-shapes-by-kong-chan-2/sssssp4k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-of-irregular-shapes-by-kong-chan-2/sssssp4k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-of-irregular-shapes-by-kong-chan-2/sssssp4k"/>
      <lastmod>2026-11-02T17:40:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/third-egg-surface-construction-with-geometric-mean-and-poisson-distribution/sssssp4z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/third-egg-surface-construction-with-geometric-mean-and-poisson-distribution/sssssp4z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/third-egg-surface-construction-with-geometric-mean-and-poisson-distribution/sssssp4z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/third-egg-surface-construction-with-geometric-mean-and-poisson-distribution/sssssp4z"/>
      <lastmod>2026-11-01T19:01:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/third-egg-surface-construction-with-geometric-mean-and-poisson-distribution/sssssp4z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/third-egg-surface-construction-with-geometric-mean-and-poisson-distribution/sssssp4z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/third-egg-surface-construction-with-geometric-mean-and-poisson-distribution/sssssp4z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/third-egg-surface-construction-with-geometric-mean-and-poisson-distribution/sssssp4z"/>
      <lastmod>2026-11-01T19:01:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-and-subtraction-simulation/sssssp40</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-and-subtraction-simulation/sssssp40"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-and-subtraction-simulation/sssssp40"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-and-subtraction-simulation/sssssp40"/>
      <lastmod>2026-11-01T19:19:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-and-subtraction-simulation/sssssp40</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-and-subtraction-simulation/sssssp40"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-and-subtraction-simulation/sssssp40"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-and-subtraction-simulation/sssssp40"/>
      <lastmod>2026-11-01T19:19:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-fraction-division/sssssp4d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-fraction-division/sssssp4d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-fraction-division/sssssp4d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-fraction-division/sssssp4d"/>
      <lastmod>2026-11-02T13:08:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-fraction-division/sssssp4d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-fraction-division/sssssp4d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-fraction-division/sssssp4d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-fraction-division/sssssp4d"/>
      <lastmod>2026-11-02T13:08:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/velocity-and-acceleration-vector-decomposition-on-a-parametric-curve/sssssp4f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/velocity-and-acceleration-vector-decomposition-on-a-parametric-curve/sssssp4f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/velocity-and-acceleration-vector-decomposition-on-a-parametric-curve/sssssp4f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/velocity-and-acceleration-vector-decomposition-on-a-parametric-curve/sssssp4f"/>
      <lastmod>2026-11-02T02:48:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/velocity-and-acceleration-vector-decomposition-on-a-parametric-curve/sssssp4f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/velocity-and-acceleration-vector-decomposition-on-a-parametric-curve/sssssp4f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/velocity-and-acceleration-vector-decomposition-on-a-parametric-curve/sssssp4f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/velocity-and-acceleration-vector-decomposition-on-a-parametric-curve/sssssp4f"/>
      <lastmod>2026-11-02T02:48:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoid-exploration-by-courtney-o-berry/sssssp48</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-exploration-by-courtney-o-berry/sssssp48"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-exploration-by-courtney-o-berry/sssssp48"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-exploration-by-courtney-o-berry/sssssp48"/>
      <lastmod>2026-11-02T16:33:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoid-exploration-by-courtney-o-berry/sssssp48</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-exploration-by-courtney-o-berry/sssssp48"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-exploration-by-courtney-o-berry/sssssp48"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-exploration-by-courtney-o-berry/sssssp48"/>
      <lastmod>2026-11-02T16:33:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hole-6-math-example/sssssp4u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hole-6-math-example/sssssp4u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hole-6-math-example/sssssp4u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hole-6-math-example/sssssp4u"/>
      <lastmod>2026-11-02T09:15:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hole-6-math-example/sssssp4u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hole-6-math-example/sssssp4u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hole-6-math-example/sssssp4u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hole-6-math-example/sssssp4u"/>
      <lastmod>2026-11-02T09:15:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/runge-kutta-4th-order-method-demo/sssssp45</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/runge-kutta-4th-order-method-demo/sssssp45"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/runge-kutta-4th-order-method-demo/sssssp45"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/runge-kutta-4th-order-method-demo/sssssp45"/>
      <lastmod>2026-11-02T02:20:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/runge-kutta-4th-order-method-demo/sssssp45</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/runge-kutta-4th-order-method-demo/sssssp45"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/runge-kutta-4th-order-method-demo/sssssp45"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/runge-kutta-4th-order-method-demo/sssssp45"/>
      <lastmod>2026-11-02T02:20:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/point-circle-and-sphere-exploration/sssssp4b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-circle-and-sphere-exploration/sssssp4b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-circle-and-sphere-exploration/sssssp4b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-circle-and-sphere-exploration/sssssp4b"/>
      <lastmod>2026-11-02T13:56:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/point-circle-and-sphere-exploration/sssssp4b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-circle-and-sphere-exploration/sssssp4b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-circle-and-sphere-exploration/sssssp4b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-circle-and-sphere-exploration/sssssp4b"/>
      <lastmod>2026-11-02T13:56:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-26885/sssssp43</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-26885/sssssp43"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-26885/sssssp43"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-26885/sssssp43"/>
      <lastmod>2026-11-02T16:33:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-26885/sssssp43</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-26885/sssssp43"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-26885/sssssp43"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-26885/sssssp43"/>
      <lastmod>2026-11-02T16:33:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/completing-the-square-for-quadratic-functions/sssssp4q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/completing-the-square-for-quadratic-functions/sssssp4q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/completing-the-square-for-quadratic-functions/sssssp4q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/completing-the-square-for-quadratic-functions/sssssp4q"/>
      <lastmod>2026-11-02T02:29:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/completing-the-square-for-quadratic-functions/sssssp4q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/completing-the-square-for-quadratic-functions/sssssp4q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/completing-the-square-for-quadratic-functions/sssssp4q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/completing-the-square-for-quadratic-functions/sssssp4q"/>
      <lastmod>2026-11-02T02:29:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-areas-of-polygons/sssssp41</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-areas-of-polygons/sssssp41"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-areas-of-polygons/sssssp41"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-areas-of-polygons/sssssp41"/>
      <lastmod>2026-11-01T23:59:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-areas-of-polygons/sssssp41</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-areas-of-polygons/sssssp41"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-areas-of-polygons/sssssp41"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-areas-of-polygons/sssssp41"/>
      <lastmod>2026-11-01T23:59:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-sequence-and-3d-shape-demonstration/sssssp4m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-sequence-and-3d-shape-demonstration/sssssp4m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-sequence-and-3d-shape-demonstration/sssssp4m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-sequence-and-3d-shape-demonstration/sssssp4m"/>
      <lastmod>2026-11-01T23:43:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-sequence-and-3d-shape-demonstration/sssssp4m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-sequence-and-3d-shape-demonstration/sssssp4m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-sequence-and-3d-shape-demonstration/sssssp4m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-sequence-and-3d-shape-demonstration/sssssp4m"/>
      <lastmod>2026-11-01T23:43:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/identify-squares-and-rectangles/sssssp4j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identify-squares-and-rectangles/sssssp4j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identify-squares-and-rectangles/sssssp4j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identify-squares-and-rectangles/sssssp4j"/>
      <lastmod>2026-11-02T11:05:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/identify-squares-and-rectangles/sssssp4j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identify-squares-and-rectangles/sssssp4j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identify-squares-and-rectangles/sssssp4j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identify-squares-and-rectangles/sssssp4j"/>
      <lastmod>2026-11-02T11:05:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angles-in-a-triangle-by-arthur-lee/sssssp4p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-in-a-triangle-by-arthur-lee/sssssp4p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-in-a-triangle-by-arthur-lee/sssssp4p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-in-a-triangle-by-arthur-lee/sssssp4p"/>
      <lastmod>2026-11-02T13:51:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angles-in-a-triangle-by-arthur-lee/sssssp4p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-in-a-triangle-by-arthur-lee/sssssp4p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-in-a-triangle-by-arthur-lee/sssssp4p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-in-a-triangle-by-arthur-lee/sssssp4p"/>
      <lastmod>2026-11-02T13:51:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/family-of-sequences/sssssp4w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/family-of-sequences/sssssp4w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/family-of-sequences/sssssp4w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/family-of-sequences/sssssp4w"/>
      <lastmod>2026-11-01T19:02:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/family-of-sequences/sssssp4w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/family-of-sequences/sssssp4w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/family-of-sequences/sssssp4w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/family-of-sequences/sssssp4w"/>
      <lastmod>2026-11-01T19:02:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-volume/sssssp46</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-volume/sssssp46"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-volume/sssssp46"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-volume/sssssp46"/>
      <lastmod>2026-11-02T17:08:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-volume/sssssp46</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-volume/sssssp46"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-volume/sssssp46"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-volume/sssssp46"/>
      <lastmod>2026-11-02T17:08:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-6-7-5-practice-using-negative-numbers-to-make-sense-of-contexts/sssssp4g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-7-5-practice-using-negative-numbers-to-make-sense-of-contexts/sssssp4g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-7-5-practice-using-negative-numbers-to-make-sense-of-contexts/sssssp4g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-7-5-practice-using-negative-numbers-to-make-sense-of-contexts/sssssp4g"/>
      <lastmod>2026-11-01T20:13:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-6-7-5-practice-using-negative-numbers-to-make-sense-of-contexts/sssssp4g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-7-5-practice-using-negative-numbers-to-make-sense-of-contexts/sssssp4g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-7-5-practice-using-negative-numbers-to-make-sense-of-contexts/sssssp4g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-7-5-practice-using-negative-numbers-to-make-sense-of-contexts/sssssp4g"/>
      <lastmod>2026-11-01T20:13:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-independent-practice/sssssp49</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-independent-practice/sssssp49"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-independent-practice/sssssp49"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-independent-practice/sssssp49"/>
      <lastmod>2026-11-02T18:36:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-independent-practice/sssssp49</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-independent-practice/sssssp49"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-independent-practice/sssssp49"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-independent-practice/sssssp49"/>
      <lastmod>2026-11-02T18:36:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tr-kay-median-line-demo/sssssp4e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tr-kay-median-line-demo/sssssp4e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tr-kay-median-line-demo/sssssp4e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tr-kay-median-line-demo/sssssp4e"/>
      <lastmod>2026-11-02T15:52:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tr-kay-median-line-demo/sssssp4e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tr-kay-median-line-demo/sssssp4e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tr-kay-median-line-demo/sssssp4e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tr-kay-median-line-demo/sssssp4e"/>
      <lastmod>2026-11-02T15:52:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/riemann-sum/sssssp4v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-sum/sssssp4v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-sum/sssssp4v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-sum/sssssp4v"/>
      <lastmod>2026-11-02T03:02:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/riemann-sum/sssssp4v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-sum/sssssp4v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-sum/sssssp4v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-sum/sssssp4v"/>
      <lastmod>2026-11-02T03:02:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/one-sided-limits-demo/sssssp44</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-sided-limits-demo/sssssp44"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-sided-limits-demo/sssssp44"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-sided-limits-demo/sssssp44"/>
      <lastmod>2026-11-01T21:17:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/one-sided-limits-demo/sssssp44</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-sided-limits-demo/sssssp44"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-sided-limits-demo/sssssp44"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-sided-limits-demo/sssssp44"/>
      <lastmod>2026-11-01T21:17:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-cosine-graph-by-sarah-boyle/sssssp4l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-cosine-graph-by-sarah-boyle/sssssp4l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-cosine-graph-by-sarah-boyle/sssssp4l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-cosine-graph-by-sarah-boyle/sssssp4l"/>
      <lastmod>2026-11-01T21:54:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-cosine-graph-by-sarah-boyle/sssssp4l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-cosine-graph-by-sarah-boyle/sssssp4l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-cosine-graph-by-sarah-boyle/sssssp4l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-cosine-graph-by-sarah-boyle/sssssp4l"/>
      <lastmod>2026-11-01T21:54:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-bisector-by-paul-jorgens/sssssp4y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-by-paul-jorgens/sssssp4y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisector-by-paul-jorgens/sssssp4y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-by-paul-jorgens/sssssp4y"/>
      <lastmod>2026-11-02T18:12:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-bisector-by-paul-jorgens/sssssp4y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-by-paul-jorgens/sssssp4y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisector-by-paul-jorgens/sssssp4y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-by-paul-jorgens/sssssp4y"/>
      <lastmod>2026-11-02T18:12:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/standard-deviation-variance/sssssp4a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-deviation-variance/sssssp4a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-deviation-variance/sssssp4a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-deviation-variance/sssssp4a"/>
      <lastmod>2026-11-01T23:30:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/standard-deviation-variance/sssssp4a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-deviation-variance/sssssp4a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-deviation-variance/sssssp4a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-deviation-variance/sssssp4a"/>
      <lastmod>2026-11-01T23:30:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/from-3d-to-2d-parabola-as-projection-of-a-circle/sssssp4c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/from-3d-to-2d-parabola-as-projection-of-a-circle/sssssp4c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/from-3d-to-2d-parabola-as-projection-of-a-circle/sssssp4c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/from-3d-to-2d-parabola-as-projection-of-a-circle/sssssp4c"/>
      <lastmod>2026-11-01T23:14:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/from-3d-to-2d-parabola-as-projection-of-a-circle/sssssp4c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/from-3d-to-2d-parabola-as-projection-of-a-circle/sssssp4c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/from-3d-to-2d-parabola-as-projection-of-a-circle/sssssp4c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/from-3d-to-2d-parabola-as-projection-of-a-circle/sssssp4c"/>
      <lastmod>2026-11-01T23:14:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cross-sections-of-quadratic-surfaces-demo/sssssp4r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-sections-of-quadratic-surfaces-demo/sssssp4r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-sections-of-quadratic-surfaces-demo/sssssp4r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-sections-of-quadratic-surfaces-demo/sssssp4r"/>
      <lastmod>2026-11-02T17:49:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cross-sections-of-quadratic-surfaces-demo/sssssp4r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-sections-of-quadratic-surfaces-demo/sssssp4r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-sections-of-quadratic-surfaces-demo/sssssp4r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-sections-of-quadratic-surfaces-demo/sssssp4r"/>
      <lastmod>2026-11-02T17:49:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/truncated-icosahedron-construction/sssssp4h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-icosahedron-construction/sssssp4h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-icosahedron-construction/sssssp4h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-icosahedron-construction/sssssp4h"/>
      <lastmod>2026-11-02T13:35:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/truncated-icosahedron-construction/sssssp4h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-icosahedron-construction/sssssp4h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-icosahedron-construction/sssssp4h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-icosahedron-construction/sssssp4h"/>
      <lastmod>2026-11-02T13:35:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/first-quadrant-blank/sssssp4t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/first-quadrant-blank/sssssp4t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/first-quadrant-blank/sssssp4t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/first-quadrant-blank/sssssp4t"/>
      <lastmod>2026-11-01T23:12:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/first-quadrant-blank/sssssp4t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/first-quadrant-blank/sssssp4t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/first-quadrant-blank/sssssp4t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/first-quadrant-blank/sssssp4t"/>
      <lastmod>2026-11-01T23:12:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-piecewise-functions-and-statistical-characteristics/sssssp4x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-piecewise-functions-and-statistical-characteristics/sssssp4x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-piecewise-functions-and-statistical-characteristics/sssssp4x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-piecewise-functions-and-statistical-characteristics/sssssp4x"/>
      <lastmod>2026-11-02T18:08:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-piecewise-functions-and-statistical-characteristics/sssssp4x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-piecewise-functions-and-statistical-characteristics/sssssp4x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-piecewise-functions-and-statistical-characteristics/sssssp4x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-piecewise-functions-and-statistical-characteristics/sssssp4x"/>
      <lastmod>2026-11-02T18:08:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-the-sum-rule-for-derivatives/sssssp4i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-sum-rule-for-derivatives/sssssp4i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-sum-rule-for-derivatives/sssssp4i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-sum-rule-for-derivatives/sssssp4i"/>
      <lastmod>2026-11-02T00:10:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-the-sum-rule-for-derivatives/sssssp4i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-sum-rule-for-derivatives/sssssp4i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-sum-rule-for-derivatives/sssssp4i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-sum-rule-for-derivatives/sssssp4i"/>
      <lastmod>2026-11-02T00:10:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-foci/sssssp4o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-foci/sssssp4o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-foci/sssssp4o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-foci/sssssp4o"/>
      <lastmod>2026-11-02T18:09:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-foci/sssssp4o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-foci/sssssp4o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-foci/sssssp4o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-foci/sssssp4o"/>
      <lastmod>2026-11-02T18:09:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/understanding-tangent-using-similar-triangles/ssssspls</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/understanding-tangent-using-similar-triangles/ssssspls"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/understanding-tangent-using-similar-triangles/ssssspls"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/understanding-tangent-using-similar-triangles/ssssspls"/>
      <lastmod>2026-11-02T13:50:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/understanding-tangent-using-similar-triangles/ssssspls</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/understanding-tangent-using-similar-triangles/ssssspls"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/understanding-tangent-using-similar-triangles/ssssspls"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/understanding-tangent-using-similar-triangles/ssssspls"/>
      <lastmod>2026-11-02T13:50:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/investigating-quadrilaterals/ssssspl7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-quadrilaterals/ssssspl7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-quadrilaterals/ssssspl7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-quadrilaterals/ssssspl7"/>
      <lastmod>2026-11-02T11:48:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/investigating-quadrilaterals/ssssspl7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-quadrilaterals/ssssspl7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-quadrilaterals/ssssspl7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-quadrilaterals/ssssspl7"/>
      <lastmod>2026-11-02T11:48:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/annuity-loan-calculation/ssssspln</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/annuity-loan-calculation/ssssspln"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/annuity-loan-calculation/ssssspln"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/annuity-loan-calculation/ssssspln"/>
      <lastmod>2026-11-01T23:43:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/annuity-loan-calculation/ssssspln</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/annuity-loan-calculation/ssssspln"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/annuity-loan-calculation/ssssspln"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/annuity-loan-calculation/ssssspln"/>
      <lastmod>2026-11-01T23:43:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rational-function-end-behavior/ssssspl2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rational-function-end-behavior/ssssspl2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rational-function-end-behavior/ssssspl2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rational-function-end-behavior/ssssspl2"/>
      <lastmod>2026-11-02T15:54:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rational-function-end-behavior/ssssspl2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rational-function-end-behavior/ssssspl2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rational-function-end-behavior/ssssspl2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rational-function-end-behavior/ssssspl2"/>
      <lastmod>2026-11-02T15:54:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-bisector-construction-by-sara-delgado-rivero/sssssplk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-bisector-construction-by-sara-delgado-rivero/sssssplk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-bisector-construction-by-sara-delgado-rivero/sssssplk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-bisector-construction-by-sara-delgado-rivero/sssssplk"/>
      <lastmod>2026-11-01T21:22:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-bisector-construction-by-sara-delgado-rivero/sssssplk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-bisector-construction-by-sara-delgado-rivero/sssssplk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-bisector-construction-by-sara-delgado-rivero/sssssplk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-bisector-construction-by-sara-delgado-rivero/sssssplk"/>
      <lastmod>2026-11-01T21:22:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/representation-of-a-cubic-polynomial/sssssplz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/representation-of-a-cubic-polynomial/sssssplz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/representation-of-a-cubic-polynomial/sssssplz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/representation-of-a-cubic-polynomial/sssssplz"/>
      <lastmod>2026-11-01T19:13:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/representation-of-a-cubic-polynomial/sssssplz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/representation-of-a-cubic-polynomial/sssssplz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/representation-of-a-cubic-polynomial/sssssplz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/representation-of-a-cubic-polynomial/sssssplz"/>
      <lastmod>2026-11-01T19:13:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construction-of-a-45-angle-with-verification/ssssspl0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-a-45-angle-with-verification/ssssspl0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-a-45-angle-with-verification/ssssspl0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-a-45-angle-with-verification/ssssspl0"/>
      <lastmod>2026-11-02T09:08:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construction-of-a-45-angle-with-verification/ssssspl0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-a-45-angle-with-verification/ssssspl0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-a-45-angle-with-verification/ssssspl0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-a-45-angle-with-verification/ssssspl0"/>
      <lastmod>2026-11-02T09:08:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-numbers-rectangular-and-trigonometric-form/ssssspld</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-numbers-rectangular-and-trigonometric-form/ssssspld"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-numbers-rectangular-and-trigonometric-form/ssssspld"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-numbers-rectangular-and-trigonometric-form/ssssspld"/>
      <lastmod>2026-11-02T09:30:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-numbers-rectangular-and-trigonometric-form/ssssspld</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-numbers-rectangular-and-trigonometric-form/ssssspld"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-numbers-rectangular-and-trigonometric-form/ssssspld"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-numbers-rectangular-and-trigonometric-form/ssssspld"/>
      <lastmod>2026-11-02T09:30:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-and-poisson-distributions-by-hlho/sssssplf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-and-poisson-distributions-by-hlho/sssssplf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-and-poisson-distributions-by-hlho/sssssplf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-and-poisson-distributions-by-hlho/sssssplf"/>
      <lastmod>2026-11-01T23:49:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-and-poisson-distributions-by-hlho/sssssplf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-and-poisson-distributions-by-hlho/sssssplf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-and-poisson-distributions-by-hlho/sssssplf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-and-poisson-distributions-by-hlho/sssssplf"/>
      <lastmod>2026-11-01T23:49:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-tangent-to-two-lines/ssssspl8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-tangent-to-two-lines/ssssspl8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-tangent-to-two-lines/ssssspl8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-tangent-to-two-lines/ssssspl8"/>
      <lastmod>2026-11-02T02:32:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-tangent-to-two-lines/ssssspl8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-tangent-to-two-lines/ssssspl8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-tangent-to-two-lines/ssssspl8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-tangent-to-two-lines/ssssspl8"/>
      <lastmod>2026-11-02T02:32:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visual-comparison-of-simpson-s-rule-and-trapezium-rule/sssssplu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visual-comparison-of-simpson-s-rule-and-trapezium-rule/sssssplu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visual-comparison-of-simpson-s-rule-and-trapezium-rule/sssssplu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visual-comparison-of-simpson-s-rule-and-trapezium-rule/sssssplu"/>
      <lastmod>2026-11-02T18:29:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visual-comparison-of-simpson-s-rule-and-trapezium-rule/sssssplu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visual-comparison-of-simpson-s-rule-and-trapezium-rule/sssssplu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visual-comparison-of-simpson-s-rule-and-trapezium-rule/sssssplu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visual-comparison-of-simpson-s-rule-and-trapezium-rule/sssssplu"/>
      <lastmod>2026-11-02T18:29:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-sine-graph-by-warren-pearson/ssssspl5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-graph-by-warren-pearson/ssssspl5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-sine-graph-by-warren-pearson/ssssspl5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-graph-by-warren-pearson/ssssspl5"/>
      <lastmod>2026-11-01T19:29:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-sine-graph-by-warren-pearson/ssssspl5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-graph-by-warren-pearson/ssssspl5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-sine-graph-by-warren-pearson/ssssspl5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-sine-graph-by-warren-pearson/ssssspl5"/>
      <lastmod>2026-11-01T19:29:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflections-rotations-dilations-and-translations-by-robyn-porter/sssssplb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-rotations-dilations-and-translations-by-robyn-porter/sssssplb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-rotations-dilations-and-translations-by-robyn-porter/sssssplb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-rotations-dilations-and-translations-by-robyn-porter/sssssplb"/>
      <lastmod>2026-11-01T21:35:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflections-rotations-dilations-and-translations-by-robyn-porter/sssssplb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-rotations-dilations-and-translations-by-robyn-porter/sssssplb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-rotations-dilations-and-translations-by-robyn-porter/sssssplb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-rotations-dilations-and-translations-by-robyn-porter/sssssplb"/>
      <lastmod>2026-11-01T21:35:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/painting-circles/ssssspl3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/painting-circles/ssssspl3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/painting-circles/ssssspl3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/painting-circles/ssssspl3"/>
      <lastmod>2026-11-02T02:56:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/painting-circles/ssssspl3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/painting-circles/ssssspl3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/painting-circles/ssssspl3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/painting-circles/ssssspl3"/>
      <lastmod>2026-11-02T02:56:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similarity-transformation-and-vector-operations/sssssplq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similarity-transformation-and-vector-operations/sssssplq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similarity-transformation-and-vector-operations/sssssplq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similarity-transformation-and-vector-operations/sssssplq"/>
      <lastmod>2026-11-02T17:57:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similarity-transformation-and-vector-operations/sssssplq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similarity-transformation-and-vector-operations/sssssplq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similarity-transformation-and-vector-operations/sssssplq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similarity-transformation-and-vector-operations/sssssplq"/>
      <lastmod>2026-11-02T17:57:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dividing-mixed-numbers-interactive-demo-bilingual/ssssspl1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dividing-mixed-numbers-interactive-demo-bilingual/ssssspl1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dividing-mixed-numbers-interactive-demo-bilingual/ssssspl1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dividing-mixed-numbers-interactive-demo-bilingual/ssssspl1"/>
      <lastmod>2026-11-02T15:07:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dividing-mixed-numbers-interactive-demo-bilingual/ssssspl1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dividing-mixed-numbers-interactive-demo-bilingual/ssssspl1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dividing-mixed-numbers-interactive-demo-bilingual/ssssspl1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dividing-mixed-numbers-interactive-demo-bilingual/ssssspl1"/>
      <lastmod>2026-11-02T15:07:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/talos-pawn/sssssplm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/talos-pawn/sssssplm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/talos-pawn/sssssplm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/talos-pawn/sssssplm"/>
      <lastmod>2026-11-02T17:43:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/talos-pawn/sssssplm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/talos-pawn/sssssplm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/talos-pawn/sssssplm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/talos-pawn/sssssplm"/>
      <lastmod>2026-11-02T17:43:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-illustration-of-a-special-secant-segment-in-intersecting-circles/sssssplj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-a-special-secant-segment-in-intersecting-circles/sssssplj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-a-special-secant-segment-in-intersecting-circles/sssssplj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-a-special-secant-segment-in-intersecting-circles/sssssplj"/>
      <lastmod>2026-11-02T18:55:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-illustration-of-a-special-secant-segment-in-intersecting-circles/sssssplj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-a-special-secant-segment-in-intersecting-circles/sssssplj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-a-special-secant-segment-in-intersecting-circles/sssssplj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-a-special-secant-segment-in-intersecting-circles/sssssplj"/>
      <lastmod>2026-11-02T18:55:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-rotation/sssssplp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-rotation/sssssplp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-rotation/sssssplp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-rotation/sssssplp"/>
      <lastmod>2026-11-02T11:44:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-rotation/sssssplp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-rotation/sssssplp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-rotation/sssssplp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-rotation/sssssplp"/>
      <lastmod>2026-11-02T11:44:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-function-relationships/sssssplw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-function-relationships/sssssplw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-function-relationships/sssssplw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-function-relationships/sssssplw"/>
      <lastmod>2026-11-02T00:47:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-function-relationships/sssssplw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-function-relationships/sssssplw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-function-relationships/sssssplw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-function-relationships/sssssplw"/>
      <lastmod>2026-11-02T00:47:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/discontinuous-derivative-demonstration/ssssspl6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discontinuous-derivative-demonstration/ssssspl6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discontinuous-derivative-demonstration/ssssspl6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discontinuous-derivative-demonstration/ssssspl6"/>
      <lastmod>2026-11-01T21:28:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/discontinuous-derivative-demonstration/ssssspl6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/discontinuous-derivative-demonstration/ssssspl6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/discontinuous-derivative-demonstration/ssssspl6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/discontinuous-derivative-demonstration/ssssspl6"/>
      <lastmod>2026-11-01T21:28:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-addition-practice-exercise-interactive-geogebra-worksheet/sssssplg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-addition-practice-exercise-interactive-geogebra-worksheet/sssssplg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-addition-practice-exercise-interactive-geogebra-worksheet/sssssplg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-addition-practice-exercise-interactive-geogebra-worksheet/sssssplg"/>
      <lastmod>2026-11-01T19:10:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-addition-practice-exercise-interactive-geogebra-worksheet/sssssplg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-addition-practice-exercise-interactive-geogebra-worksheet/sssssplg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-addition-practice-exercise-interactive-geogebra-worksheet/sssssplg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-addition-practice-exercise-interactive-geogebra-worksheet/sssssplg"/>
      <lastmod>2026-11-01T19:10:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/napoleon-s-triangles-tri-ngulos-de-napole-n-dynamic-geometry/ssssspl9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/napoleon-s-triangles-tri-ngulos-de-napole-n-dynamic-geometry/ssssspl9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/napoleon-s-triangles-tri-ngulos-de-napole-n-dynamic-geometry/ssssspl9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/napoleon-s-triangles-tri-ngulos-de-napole-n-dynamic-geometry/ssssspl9"/>
      <lastmod>2026-11-01T19:14:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/napoleon-s-triangles-tri-ngulos-de-napole-n-dynamic-geometry/ssssspl9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/napoleon-s-triangles-tri-ngulos-de-napole-n-dynamic-geometry/ssssspl9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/napoleon-s-triangles-tri-ngulos-de-napole-n-dynamic-geometry/ssssspl9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/napoleon-s-triangles-tri-ngulos-de-napole-n-dynamic-geometry/ssssspl9"/>
      <lastmod>2026-11-01T19:14:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/families-of-functions-task/sssssple</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/families-of-functions-task/sssssple"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/families-of-functions-task/sssssple"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/families-of-functions-task/sssssple"/>
      <lastmod>2026-11-02T13:52:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/families-of-functions-task/sssssple</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/families-of-functions-task/sssssple"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/families-of-functions-task/sssssple"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/families-of-functions-task/sssssple"/>
      <lastmod>2026-11-02T13:52:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-angle-angle-construction/sssssplv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-angle-angle-construction/sssssplv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-angle-angle-construction/sssssplv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-angle-angle-construction/sssssplv"/>
      <lastmod>2026-11-02T18:16:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-angle-angle-construction/sssssplv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-angle-angle-construction/sssssplv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-angle-angle-construction/sssssplv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-angle-angle-construction/sssssplv"/>
      <lastmod>2026-11-02T18:16:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/golden-ratio-and-arithmetic-mean/ssssspl4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/golden-ratio-and-arithmetic-mean/ssssspl4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/golden-ratio-and-arithmetic-mean/ssssspl4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/golden-ratio-and-arithmetic-mean/ssssspl4"/>
      <lastmod>2026-11-02T14:51:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/golden-ratio-and-arithmetic-mean/ssssspl4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/golden-ratio-and-arithmetic-mean/ssssspl4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/golden-ratio-and-arithmetic-mean/ssssspl4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/golden-ratio-and-arithmetic-mean/ssssspl4"/>
      <lastmod>2026-11-02T14:51:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-construction-demonstration/ssssspll</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-construction-demonstration/ssssspll"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-construction-demonstration/ssssspll"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-construction-demonstration/ssssspll"/>
      <lastmod>2026-11-01T21:11:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-construction-demonstration/ssssspll</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-construction-demonstration/ssssspll"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-construction-demonstration/ssssspll"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-construction-demonstration/ssssspll"/>
      <lastmod>2026-11-01T21:11:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangular-prism-construction/sssssply</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-prism-construction/sssssply"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-prism-construction/sssssply"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-prism-construction/sssssply"/>
      <lastmod>2026-11-01T22:05:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangular-prism-construction/sssssply</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-prism-construction/sssssply"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-prism-construction/sssssply"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-prism-construction/sssssply"/>
      <lastmod>2026-11-01T22:05:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-circles-on-number-line/ssssspla</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-circles-on-number-line/ssssspla"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-circles-on-number-line/ssssspla"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-circles-on-number-line/ssssspla"/>
      <lastmod>2026-11-01T19:12:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-circles-on-number-line/ssssspla</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-circles-on-number-line/ssssspla"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-circles-on-number-line/ssssspla"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-circles-on-number-line/ssssspla"/>
      <lastmod>2026-11-01T19:12:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivatives-of-inverses/sssssplc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivatives-of-inverses/sssssplc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivatives-of-inverses/sssssplc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivatives-of-inverses/sssssplc"/>
      <lastmod>2026-11-02T17:35:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivatives-of-inverses/sssssplc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivatives-of-inverses/sssssplc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivatives-of-inverses/sssssplc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivatives-of-inverses/sssssplc"/>
      <lastmod>2026-11-02T17:35:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-tammacooper/sssssplr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-tammacooper/sssssplr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-by-tammacooper/sssssplr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-tammacooper/sssssplr"/>
      <lastmod>2026-11-02T12:25:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-by-tammacooper/sssssplr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-tammacooper/sssssplr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-by-tammacooper/sssssplr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-tammacooper/sssssplr"/>
      <lastmod>2026-11-02T12:25:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-roots-of-quartics/sssssplh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-roots-of-quartics/sssssplh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-roots-of-quartics/sssssplh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-roots-of-quartics/sssssplh"/>
      <lastmod>2026-11-01T21:07:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-roots-of-quartics/sssssplh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-roots-of-quartics/sssssplh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-roots-of-quartics/sssssplh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-roots-of-quartics/sssssplh"/>
      <lastmod>2026-11-01T21:07:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-variable-linear-quadratic-functions/sssssplt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-variable-linear-quadratic-functions/sssssplt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-variable-linear-quadratic-functions/sssssplt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-variable-linear-quadratic-functions/sssssplt"/>
      <lastmod>2026-11-02T06:13:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-variable-linear-quadratic-functions/sssssplt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-variable-linear-quadratic-functions/sssssplt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-variable-linear-quadratic-functions/sssssplt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-variable-linear-quadratic-functions/sssssplt"/>
      <lastmod>2026-11-02T06:13:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-the-three-parallels-theorem/sssssplx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-three-parallels-theorem/sssssplx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-three-parallels-theorem/sssssplx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-three-parallels-theorem/sssssplx"/>
      <lastmod>2026-11-02T18:25:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-the-three-parallels-theorem/sssssplx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-three-parallels-theorem/sssssplx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-three-parallels-theorem/sssssplx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-three-parallels-theorem/sssssplx"/>
      <lastmod>2026-11-02T18:25:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-a-parallelogram-by-bernard-smith/ssssspli</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-parallelogram-by-bernard-smith/ssssspli"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-parallelogram-by-bernard-smith/ssssspli"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-parallelogram-by-bernard-smith/ssssspli"/>
      <lastmod>2026-11-02T17:50:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-a-parallelogram-by-bernard-smith/ssssspli</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-parallelogram-by-bernard-smith/ssssspli"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-parallelogram-by-bernard-smith/ssssspli"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-parallelogram-by-bernard-smith/ssssspli"/>
      <lastmod>2026-11-02T17:50:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/average-value-of-a-function/sssssplo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/average-value-of-a-function/sssssplo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/average-value-of-a-function/sssssplo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/average-value-of-a-function/sssssplo"/>
      <lastmod>2026-11-02T08:52:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/average-value-of-a-function/sssssplo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/average-value-of-a-function/sssssplo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/average-value-of-a-function/sssssplo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/average-value-of-a-function/sssssplo"/>
      <lastmod>2026-11-02T08:52:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/set-operations-illustrated-by-venn-diagram/ssssspys</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/set-operations-illustrated-by-venn-diagram/ssssspys"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/set-operations-illustrated-by-venn-diagram/ssssspys"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/set-operations-illustrated-by-venn-diagram/ssssspys"/>
      <lastmod>2026-11-01T20:46:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/set-operations-illustrated-by-venn-diagram/ssssspys</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/set-operations-illustrated-by-venn-diagram/ssssspys"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/set-operations-illustrated-by-venn-diagram/ssssspys"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/set-operations-illustrated-by-venn-diagram/ssssspys"/>
      <lastmod>2026-11-01T20:46:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-rational-functions/ssssspy7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-rational-functions/ssssspy7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-rational-functions/ssssspy7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-rational-functions/ssssspy7"/>
      <lastmod>2026-11-01T21:23:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-rational-functions/ssssspy7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-rational-functions/ssssspy7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-rational-functions/ssssspy7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-rational-functions/ssssspy7"/>
      <lastmod>2026-11-01T21:23:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bezier-curve-dynamic-construction-and-geometric-visualization/ssssspyn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bezier-curve-dynamic-construction-and-geometric-visualization/ssssspyn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bezier-curve-dynamic-construction-and-geometric-visualization/ssssspyn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bezier-curve-dynamic-construction-and-geometric-visualization/ssssspyn"/>
      <lastmod>2026-11-02T18:00:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bezier-curve-dynamic-construction-and-geometric-visualization/ssssspyn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bezier-curve-dynamic-construction-and-geometric-visualization/ssssspyn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bezier-curve-dynamic-construction-and-geometric-visualization/ssssspyn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bezier-curve-dynamic-construction-and-geometric-visualization/ssssspyn"/>
      <lastmod>2026-11-02T18:00:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modeling-4-glasses-using-transformational-geometry/ssssspy2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modeling-4-glasses-using-transformational-geometry/ssssspy2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modeling-4-glasses-using-transformational-geometry/ssssspy2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modeling-4-glasses-using-transformational-geometry/ssssspy2"/>
      <lastmod>2026-11-01T20:58:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modeling-4-glasses-using-transformational-geometry/ssssspy2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modeling-4-glasses-using-transformational-geometry/ssssspy2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modeling-4-glasses-using-transformational-geometry/ssssspy2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modeling-4-glasses-using-transformational-geometry/ssssspy2"/>
      <lastmod>2026-11-01T20:58:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/curve-fitting-and-derivative-analysis-of-finland-s-outline/ssssspyk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curve-fitting-and-derivative-analysis-of-finland-s-outline/ssssspyk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curve-fitting-and-derivative-analysis-of-finland-s-outline/ssssspyk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curve-fitting-and-derivative-analysis-of-finland-s-outline/ssssspyk"/>
      <lastmod>2026-11-01T20:45:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/curve-fitting-and-derivative-analysis-of-finland-s-outline/ssssspyk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curve-fitting-and-derivative-analysis-of-finland-s-outline/ssssspyk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curve-fitting-and-derivative-analysis-of-finland-s-outline/ssssspyk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curve-fitting-and-derivative-analysis-of-finland-s-outline/ssssspyk"/>
      <lastmod>2026-11-01T20:45:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/addition-with-regrouping/ssssspyz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-with-regrouping/ssssspyz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-with-regrouping/ssssspyz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-with-regrouping/ssssspyz"/>
      <lastmod>2026-11-01T20:57:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/addition-with-regrouping/ssssspyz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-with-regrouping/ssssspyz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-with-regrouping/ssssspyz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-with-regrouping/ssssspyz"/>
      <lastmod>2026-11-01T20:57:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-wave-sounds-demo/ssssspy0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-wave-sounds-demo/ssssspy0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-wave-sounds-demo/ssssspy0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-wave-sounds-demo/ssssspy0"/>
      <lastmod>2026-11-02T15:50:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-wave-sounds-demo/ssssspy0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-wave-sounds-demo/ssssspy0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-wave-sounds-demo/ssssspy0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-wave-sounds-demo/ssssspy0"/>
      <lastmod>2026-11-02T15:50:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-under-a-curve/ssssspyd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-under-a-curve/ssssspyd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-under-a-curve/ssssspyd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-under-a-curve/ssssspyd"/>
      <lastmod>2026-11-01T20:53:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-under-a-curve/ssssspyd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-under-a-curve/ssssspyd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-under-a-curve/ssssspyd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-under-a-curve/ssssspyd"/>
      <lastmod>2026-11-01T20:53:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-by-disks/ssssspyf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-by-disks/ssssspyf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-by-disks/ssssspyf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-by-disks/ssssspyf"/>
      <lastmod>2026-11-02T18:11:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-by-disks/ssssspyf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-by-disks/ssssspyf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-by-disks/ssssspyf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-by-disks/ssssspyf"/>
      <lastmod>2026-11-02T18:11:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/learn-math-while-playing-mathlego/ssssspy8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/learn-math-while-playing-mathlego/ssssspy8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/learn-math-while-playing-mathlego/ssssspy8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/learn-math-while-playing-mathlego/ssssspy8"/>
      <lastmod>2026-11-01T19:08:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/learn-math-while-playing-mathlego/ssssspy8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/learn-math-while-playing-mathlego/ssssspy8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/learn-math-while-playing-mathlego/ssssspy8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/learn-math-while-playing-mathlego/ssssspy8"/>
      <lastmod>2026-11-01T19:08:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-regression-using-average-point/ssssspyu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-regression-using-average-point/ssssspyu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-regression-using-average-point/ssssspyu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-regression-using-average-point/ssssspyu"/>
      <lastmod>2026-11-01T21:18:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-regression-using-average-point/ssssspyu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-regression-using-average-point/ssssspyu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-regression-using-average-point/ssssspyu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-regression-using-average-point/ssssspyu"/>
      <lastmod>2026-11-01T21:18:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-tangent-to-an-edge-of-a-regular-tetrahedron/ssssspy5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-tangent-to-an-edge-of-a-regular-tetrahedron/ssssspy5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-tangent-to-an-edge-of-a-regular-tetrahedron/ssssspy5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-tangent-to-an-edge-of-a-regular-tetrahedron/ssssspy5"/>
      <lastmod>2026-11-02T13:39:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-tangent-to-an-edge-of-a-regular-tetrahedron/ssssspy5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-tangent-to-an-edge-of-a-regular-tetrahedron/ssssspy5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-tangent-to-an-edge-of-a-regular-tetrahedron/ssssspy5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-tangent-to-an-edge-of-a-regular-tetrahedron/ssssspy5"/>
      <lastmod>2026-11-02T13:39:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/deriving-equation-from-roots/ssssspyb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/deriving-equation-from-roots/ssssspyb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/deriving-equation-from-roots/ssssspyb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/deriving-equation-from-roots/ssssspyb"/>
      <lastmod>2026-11-02T13:58:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/deriving-equation-from-roots/ssssspyb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/deriving-equation-from-roots/ssssspyb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/deriving-equation-from-roots/ssssspyb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/deriving-equation-from-roots/ssssspyb"/>
      <lastmod>2026-11-02T13:58:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-and-rectangular-coordinates-by-jamie-hansen/ssssspy3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-and-rectangular-coordinates-by-jamie-hansen/ssssspy3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-and-rectangular-coordinates-by-jamie-hansen/ssssspy3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-and-rectangular-coordinates-by-jamie-hansen/ssssspy3"/>
      <lastmod>2026-11-02T16:59:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-and-rectangular-coordinates-by-jamie-hansen/ssssspy3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-and-rectangular-coordinates-by-jamie-hansen/ssssspy3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-and-rectangular-coordinates-by-jamie-hansen/ssssspy3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-and-rectangular-coordinates-by-jamie-hansen/ssssspy3"/>
      <lastmod>2026-11-02T16:59:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/double-toblerone-quick-modeling-exploration-in-geogebra-ar-3d/ssssspyq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-toblerone-quick-modeling-exploration-in-geogebra-ar-3d/ssssspyq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-toblerone-quick-modeling-exploration-in-geogebra-ar-3d/ssssspyq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-toblerone-quick-modeling-exploration-in-geogebra-ar-3d/ssssspyq"/>
      <lastmod>2026-11-02T17:36:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/double-toblerone-quick-modeling-exploration-in-geogebra-ar-3d/ssssspyq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-toblerone-quick-modeling-exploration-in-geogebra-ar-3d/ssssspyq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-toblerone-quick-modeling-exploration-in-geogebra-ar-3d/ssssspyq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-toblerone-quick-modeling-exploration-in-geogebra-ar-3d/ssssspyq"/>
      <lastmod>2026-11-02T17:36:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-model-fraction-multiplier-by-mathspace/ssssspy1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-model-fraction-multiplier-by-mathspace/ssssspy1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-model-fraction-multiplier-by-mathspace/ssssspy1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-model-fraction-multiplier-by-mathspace/ssssspy1"/>
      <lastmod>2026-11-02T14:57:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-model-fraction-multiplier-by-mathspace/ssssspy1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-model-fraction-multiplier-by-mathspace/ssssspy1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-model-fraction-multiplier-by-mathspace/ssssspy1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-model-fraction-multiplier-by-mathspace/ssssspy1"/>
      <lastmod>2026-11-02T14:57:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/snub-cube/ssssspym</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/snub-cube/ssssspym"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/snub-cube/ssssspym"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/snub-cube/ssssspym"/>
      <lastmod>2026-11-02T09:56:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/snub-cube/ssssspym</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/snub-cube/ssssspym"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/snub-cube/ssssspym"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/snub-cube/ssssspym"/>
      <lastmod>2026-11-02T09:56:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/islamic-geometric-patterns/ssssspyj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-geometric-patterns/ssssspyj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-geometric-patterns/ssssspyj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-geometric-patterns/ssssspyj"/>
      <lastmod>2026-11-01T19:30:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/islamic-geometric-patterns/ssssspyj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-geometric-patterns/ssssspyj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-geometric-patterns/ssssspyj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-geometric-patterns/ssssspyj"/>
      <lastmod>2026-11-01T19:30:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-line/ssssspyp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-line/ssssspyp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-line/ssssspyp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-line/ssssspyp"/>
      <lastmod>2026-11-01T19:05:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-line/ssssspyp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-line/ssssspyp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-line/ssssspyp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-line/ssssspyp"/>
      <lastmod>2026-11-01T19:05:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cuboid-net-by-sunny-chan/ssssspyw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cuboid-net-by-sunny-chan/ssssspyw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cuboid-net-by-sunny-chan/ssssspyw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cuboid-net-by-sunny-chan/ssssspyw"/>
      <lastmod>2026-11-02T16:30:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cuboid-net-by-sunny-chan/ssssspyw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cuboid-net-by-sunny-chan/ssssspyw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cuboid-net-by-sunny-chan/ssssspyw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cuboid-net-by-sunny-chan/ssssspyw"/>
      <lastmod>2026-11-02T16:30:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equilateral-isosceles-and-scalene-triangles/ssssspy6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equilateral-isosceles-and-scalene-triangles/ssssspy6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equilateral-isosceles-and-scalene-triangles/ssssspy6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equilateral-isosceles-and-scalene-triangles/ssssspy6"/>
      <lastmod>2026-11-02T17:09:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equilateral-isosceles-and-scalene-triangles/ssssspy6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equilateral-isosceles-and-scalene-triangles/ssssspy6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equilateral-isosceles-and-scalene-triangles/ssssspy6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equilateral-isosceles-and-scalene-triangles/ssssspy6"/>
      <lastmod>2026-11-02T17:09:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-inequalities-by-lindsay-o-donoghue/ssssspyg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-by-lindsay-o-donoghue/ssssspyg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-inequalities-by-lindsay-o-donoghue/ssssspyg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-by-lindsay-o-donoghue/ssssspyg"/>
      <lastmod>2026-11-02T17:05:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-inequalities-by-lindsay-o-donoghue/ssssspyg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-by-lindsay-o-donoghue/ssssspyg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-inequalities-by-lindsay-o-donoghue/ssssspyg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-by-lindsay-o-donoghue/ssssspyg"/>
      <lastmod>2026-11-02T17:05:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practice-construct-an-equilateral-triangle-sssssgp4/ssssspy9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-construct-an-equilateral-triangle-sssssgp4/ssssspy9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-construct-an-equilateral-triangle-sssssgp4/ssssspy9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-construct-an-equilateral-triangle-sssssgp4/ssssspy9"/>
      <lastmod>2026-11-01T21:16:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practice-construct-an-equilateral-triangle-sssssgp4/ssssspy9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-construct-an-equilateral-triangle-sssssgp4/ssssspy9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-construct-an-equilateral-triangle-sssssgp4/ssssspy9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-construct-an-equilateral-triangle-sssssgp4/ssssspy9"/>
      <lastmod>2026-11-01T21:16:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-subtraction-geometric-demonstration-by-chris-shanahan/ssssspye</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-subtraction-geometric-demonstration-by-chris-shanahan/ssssspye"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-subtraction-geometric-demonstration-by-chris-shanahan/ssssspye"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-subtraction-geometric-demonstration-by-chris-shanahan/ssssspye"/>
      <lastmod>2026-11-02T13:55:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-subtraction-geometric-demonstration-by-chris-shanahan/ssssspye</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-subtraction-geometric-demonstration-by-chris-shanahan/ssssspye"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-subtraction-geometric-demonstration-by-chris-shanahan/ssssspye"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-subtraction-geometric-demonstration-by-chris-shanahan/ssssspye"/>
      <lastmod>2026-11-02T13:55:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-exploration-of-the-sas-similarity-theorem-for-triangles/ssssspyv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-the-sas-similarity-theorem-for-triangles/ssssspyv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-exploration-of-the-sas-similarity-theorem-for-triangles/ssssspyv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-the-sas-similarity-theorem-for-triangles/ssssspyv"/>
      <lastmod>2026-11-02T02:44:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-exploration-of-the-sas-similarity-theorem-for-triangles/ssssspyv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-the-sas-similarity-theorem-for-triangles/ssssspyv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-exploration-of-the-sas-similarity-theorem-for-triangles/ssssspyv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-the-sas-similarity-theorem-for-triangles/ssssspyv"/>
      <lastmod>2026-11-02T02:44:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/what-relationship-is-it/ssssspy4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/what-relationship-is-it/ssssspy4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/what-relationship-is-it/ssssspy4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/what-relationship-is-it/ssssspy4"/>
      <lastmod>2026-11-02T03:18:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/what-relationship-is-it/ssssspy4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/what-relationship-is-it/ssssspy4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/what-relationship-is-it/ssssspy4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/what-relationship-is-it/ssssspy4"/>
      <lastmod>2026-11-02T03:18:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-graphs/ssssspyl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-graphs/ssssspyl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-graphs/ssssspyl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-graphs/ssssspyl"/>
      <lastmod>2026-11-01T23:42:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-graphs/ssssspyl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-graphs/ssssspyl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-graphs/ssssspyl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-graphs/ssssspyl"/>
      <lastmod>2026-11-01T23:42:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/identifying-issues-in-histograms/ssssspyy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identifying-issues-in-histograms/ssssspyy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identifying-issues-in-histograms/ssssspyy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identifying-issues-in-histograms/ssssspyy"/>
      <lastmod>2026-11-01T23:49:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/identifying-issues-in-histograms/ssssspyy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identifying-issues-in-histograms/ssssspyy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identifying-issues-in-histograms/ssssspyy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identifying-issues-in-histograms/ssssspyy"/>
      <lastmod>2026-11-01T23:49:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-notation-solve-interactive-parabola-piecewise-practice/ssssspya</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-notation-solve-interactive-parabola-piecewise-practice/ssssspya"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-notation-solve-interactive-parabola-piecewise-practice/ssssspya"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-notation-solve-interactive-parabola-piecewise-practice/ssssspya"/>
      <lastmod>2026-11-02T08:43:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-notation-solve-interactive-parabola-piecewise-practice/ssssspya</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-notation-solve-interactive-parabola-piecewise-practice/ssssspya"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-notation-solve-interactive-parabola-piecewise-practice/ssssspya"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-notation-solve-interactive-parabola-piecewise-practice/ssssspya"/>
      <lastmod>2026-11-02T08:43:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-division/ssssspyc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-division/ssssspyc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-division/ssssspyc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-division/ssssspyc"/>
      <lastmod>2026-11-02T13:42:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-division/ssssspyc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-division/ssssspyc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-division/ssssspyc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-division/ssssspyc"/>
      <lastmod>2026-11-02T13:42:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-triangle-coordinate-geometry-demo/ssssspyr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-coordinate-geometry-demo/ssssspyr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-coordinate-geometry-demo/ssssspyr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-coordinate-geometry-demo/ssssspyr"/>
      <lastmod>2026-11-02T13:29:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-triangle-coordinate-geometry-demo/ssssspyr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-coordinate-geometry-demo/ssssspyr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-coordinate-geometry-demo/ssssspyr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-coordinate-geometry-demo/ssssspyr"/>
      <lastmod>2026-11-02T13:29:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slicing-solids-cross-section-practice-grade-7/ssssspyh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slicing-solids-cross-section-practice-grade-7/ssssspyh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slicing-solids-cross-section-practice-grade-7/ssssspyh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slicing-solids-cross-section-practice-grade-7/ssssspyh"/>
      <lastmod>2026-11-02T10:10:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slicing-solids-cross-section-practice-grade-7/ssssspyh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slicing-solids-cross-section-practice-grade-7/ssssspyh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slicing-solids-cross-section-practice-grade-7/ssssspyh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slicing-solids-cross-section-practice-grade-7/ssssspyh"/>
      <lastmod>2026-11-02T10:10:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/basic-transformations/ssssspyt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-transformations/ssssspyt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-transformations/ssssspyt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-transformations/ssssspyt"/>
      <lastmod>2026-11-02T00:42:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/basic-transformations/ssssspyt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-transformations/ssssspyt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-transformations/ssssspyt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-transformations/ssssspyt"/>
      <lastmod>2026-11-02T00:42:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-distances-in-the-coordinate-plane/ssssspyx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-distances-in-the-coordinate-plane/ssssspyx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-distances-in-the-coordinate-plane/ssssspyx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-distances-in-the-coordinate-plane/ssssspyx"/>
      <lastmod>2026-11-01T19:14:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-distances-in-the-coordinate-plane/ssssspyx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-distances-in-the-coordinate-plane/ssssspyx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-distances-in-the-coordinate-plane/ssssspyx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-distances-in-the-coordinate-plane/ssssspyx"/>
      <lastmod>2026-11-01T19:14:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solid-geometry-construction-and-optimization-demo/ssssspyi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solid-geometry-construction-and-optimization-demo/ssssspyi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solid-geometry-construction-and-optimization-demo/ssssspyi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solid-geometry-construction-and-optimization-demo/ssssspyi"/>
      <lastmod>2026-11-01T21:56:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solid-geometry-construction-and-optimization-demo/ssssspyi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solid-geometry-construction-and-optimization-demo/ssssspyi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solid-geometry-construction-and-optimization-demo/ssssspyi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solid-geometry-construction-and-optimization-demo/ssssspyi"/>
      <lastmod>2026-11-01T21:56:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-visualizing-the-roles-of-mean-and-standard-deviation/ssssspyo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-visualizing-the-roles-of-mean-and-standard-deviation/ssssspyo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-visualizing-the-roles-of-mean-and-standard-deviation/ssssspyo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-visualizing-the-roles-of-mean-and-standard-deviation/ssssspyo"/>
      <lastmod>2026-11-02T00:17:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-visualizing-the-roles-of-mean-and-standard-deviation/ssssspyo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-visualizing-the-roles-of-mean-and-standard-deviation/ssssspyo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-visualizing-the-roles-of-mean-and-standard-deviation/ssssspyo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-visualizing-the-roles-of-mean-and-standard-deviation/ssssspyo"/>
      <lastmod>2026-11-02T00:17:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-turning/ssssspas</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-turning/ssssspas"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-turning/ssssspas"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-turning/ssssspas"/>
      <lastmod>2026-11-01T20:55:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-turning/ssssspas</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-turning/ssssspas"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-turning/ssssspas"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-turning/ssssspas"/>
      <lastmod>2026-11-01T20:55:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/novak-djokovic-logo/ssssspa7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/novak-djokovic-logo/ssssspa7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/novak-djokovic-logo/ssssspa7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/novak-djokovic-logo/ssssspa7"/>
      <lastmod>2026-11-01T20:38:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/novak-djokovic-logo/ssssspa7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/novak-djokovic-logo/ssssspa7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/novak-djokovic-logo/ssssspa7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/novak-djokovic-logo/ssssspa7"/>
      <lastmod>2026-11-01T20:38:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-wavefronts/ssssspan</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-wavefronts/ssssspan"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-wavefronts/ssssspan"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-wavefronts/ssssspan"/>
      <lastmod>2026-11-02T17:16:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-wavefronts/ssssspan</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-wavefronts/ssssspan"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-wavefronts/ssssspan"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-wavefronts/ssssspan"/>
      <lastmod>2026-11-02T17:16:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-3d-getting-started-part-3/ssssspa2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-3d-getting-started-part-3/ssssspa2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-3d-getting-started-part-3/ssssspa2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-3d-getting-started-part-3/ssssspa2"/>
      <lastmod>2026-11-01T21:59:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-3d-getting-started-part-3/ssssspa2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-3d-getting-started-part-3/ssssspa2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-3d-getting-started-part-3/ssssspa2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-3d-getting-started-part-3/ssssspa2"/>
      <lastmod>2026-11-01T21:59:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shortest-path-on-a-graph/ssssspak</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shortest-path-on-a-graph/ssssspak"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shortest-path-on-a-graph/ssssspak"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shortest-path-on-a-graph/ssssspak"/>
      <lastmod>2026-11-02T17:56:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shortest-path-on-a-graph/ssssspak</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shortest-path-on-a-graph/ssssspak"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shortest-path-on-a-graph/ssssspak"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shortest-path-on-a-graph/ssssspak"/>
      <lastmod>2026-11-02T17:56:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/witch-of-agnesi-function-model/ssssspaz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/witch-of-agnesi-function-model/ssssspaz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/witch-of-agnesi-function-model/ssssspaz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/witch-of-agnesi-function-model/ssssspaz"/>
      <lastmod>2026-11-02T18:29:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/witch-of-agnesi-function-model/ssssspaz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/witch-of-agnesi-function-model/ssssspaz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/witch-of-agnesi-function-model/ssssspaz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/witch-of-agnesi-function-model/ssssspaz"/>
      <lastmod>2026-11-02T18:29:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-measure-of-2-with-construction-protocol/ssssspa0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-measure-of-2-with-construction-protocol/ssssspa0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-measure-of-2-with-construction-protocol/ssssspa0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-measure-of-2-with-construction-protocol/ssssspa0"/>
      <lastmod>2026-11-01T21:02:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-measure-of-2-with-construction-protocol/ssssspa0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-measure-of-2-with-construction-protocol/ssssspa0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-measure-of-2-with-construction-protocol/ssssspa0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-measure-of-2-with-construction-protocol/ssssspa0"/>
      <lastmod>2026-11-01T21:02:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/number-line-integer-addition-subtraction/ssssspad</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-line-integer-addition-subtraction/ssssspad"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-line-integer-addition-subtraction/ssssspad"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-line-integer-addition-subtraction/ssssspad"/>
      <lastmod>2026-11-02T16:54:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/number-line-integer-addition-subtraction/ssssspad</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-line-integer-addition-subtraction/ssssspad"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-line-integer-addition-subtraction/ssssspad"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-line-integer-addition-subtraction/ssssspad"/>
      <lastmod>2026-11-02T16:54:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-and-proportion-transformation/ssssspaf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-and-proportion-transformation/ssssspaf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-and-proportion-transformation/ssssspaf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-and-proportion-transformation/ssssspaf"/>
      <lastmod>2026-11-02T00:13:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-and-proportion-transformation/ssssspaf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-and-proportion-transformation/ssssspaf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-and-proportion-transformation/ssssspaf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-and-proportion-transformation/ssssspaf"/>
      <lastmod>2026-11-02T00:13:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-example-of-general-quadrilateral-with-sine-arithmetic-distribution/ssssspa8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-example-of-general-quadrilateral-with-sine-arithmetic-distribution/ssssspa8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-example-of-general-quadrilateral-with-sine-arithmetic-distribution/ssssspa8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-example-of-general-quadrilateral-with-sine-arithmetic-distribution/ssssspa8"/>
      <lastmod>2026-11-02T00:00:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-example-of-general-quadrilateral-with-sine-arithmetic-distribution/ssssspa8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-example-of-general-quadrilateral-with-sine-arithmetic-distribution/ssssspa8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-example-of-general-quadrilateral-with-sine-arithmetic-distribution/ssssspa8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-example-of-general-quadrilateral-with-sine-arithmetic-distribution/ssssspa8"/>
      <lastmod>2026-11-02T00:00:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vectors-on-the-unit-circle/ssssspau</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-on-the-unit-circle/ssssspau"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-on-the-unit-circle/ssssspau"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-on-the-unit-circle/ssssspau"/>
      <lastmod>2026-11-02T18:17:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vectors-on-the-unit-circle/ssssspau</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-on-the-unit-circle/ssssspau"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-on-the-unit-circle/ssssspau"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-on-the-unit-circle/ssssspau"/>
      <lastmod>2026-11-02T18:17:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotations-basics/ssssspa5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotations-basics/ssssspa5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotations-basics/ssssspa5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotations-basics/ssssspa5"/>
      <lastmod>2026-11-02T11:05:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotations-basics/ssssspa5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotations-basics/ssssspa5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotations-basics/ssssspa5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotations-basics/ssssspa5"/>
      <lastmod>2026-11-02T11:05:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/custom-solid-adjustable-rhombus-cross-sections-parallel-to-yaxis/ssssspab</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/custom-solid-adjustable-rhombus-cross-sections-parallel-to-yaxis/ssssspab"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/custom-solid-adjustable-rhombus-cross-sections-parallel-to-yaxis/ssssspab"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/custom-solid-adjustable-rhombus-cross-sections-parallel-to-yaxis/ssssspab"/>
      <lastmod>2026-11-02T16:31:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/custom-solid-adjustable-rhombus-cross-sections-parallel-to-yaxis/ssssspab</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/custom-solid-adjustable-rhombus-cross-sections-parallel-to-yaxis/ssssspab"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/custom-solid-adjustable-rhombus-cross-sections-parallel-to-yaxis/ssssspab"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/custom-solid-adjustable-rhombus-cross-sections-parallel-to-yaxis/ssssspab"/>
      <lastmod>2026-11-02T16:31:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/5-compound-cube/ssssspa3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/5-compound-cube/ssssspa3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/5-compound-cube/ssssspa3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/5-compound-cube/ssssspa3"/>
      <lastmod>2026-11-02T18:56:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/5-compound-cube/ssssspa3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/5-compound-cube/ssssspa3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/5-compound-cube/ssssspa3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/5-compound-cube/ssssspa3"/>
      <lastmod>2026-11-02T18:56:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilations-practice-equilateral-triangles-and-cubes/ssssspaq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-practice-equilateral-triangles-and-cubes/ssssspaq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-practice-equilateral-triangles-and-cubes/ssssspaq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-practice-equilateral-triangles-and-cubes/ssssspaq"/>
      <lastmod>2026-11-01T21:06:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilations-practice-equilateral-triangles-and-cubes/ssssspaq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-practice-equilateral-triangles-and-cubes/ssssspaq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-practice-equilateral-triangles-and-cubes/ssssspaq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-practice-equilateral-triangles-and-cubes/ssssspaq"/>
      <lastmod>2026-11-01T21:06:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/five-switch-hypothesis-testing-code-demonstration/ssssspa1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/five-switch-hypothesis-testing-code-demonstration/ssssspa1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/five-switch-hypothesis-testing-code-demonstration/ssssspa1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/five-switch-hypothesis-testing-code-demonstration/ssssspa1"/>
      <lastmod>2026-11-02T18:05:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/five-switch-hypothesis-testing-code-demonstration/ssssspa1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/five-switch-hypothesis-testing-code-demonstration/ssssspa1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/five-switch-hypothesis-testing-code-demonstration/ssssspa1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/five-switch-hypothesis-testing-code-demonstration/ssssspa1"/>
      <lastmod>2026-11-02T18:05:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-and-single-plane-intersection/ssssspam</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-and-single-plane-intersection/ssssspam"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-and-single-plane-intersection/ssssspam"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-and-single-plane-intersection/ssssspam"/>
      <lastmod>2026-11-01T19:18:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-and-single-plane-intersection/ssssspam</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-and-single-plane-intersection/ssssspam"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-and-single-plane-intersection/ssssspam"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-and-single-plane-intersection/ssssspam"/>
      <lastmod>2026-11-01T19:18:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/monty-hall-problem-demonstration-by-alkeos-souyoul/ssssspaj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/monty-hall-problem-demonstration-by-alkeos-souyoul/ssssspaj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/monty-hall-problem-demonstration-by-alkeos-souyoul/ssssspaj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/monty-hall-problem-demonstration-by-alkeos-souyoul/ssssspaj"/>
      <lastmod>2026-11-01T23:24:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/monty-hall-problem-demonstration-by-alkeos-souyoul/ssssspaj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/monty-hall-problem-demonstration-by-alkeos-souyoul/ssssspaj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/monty-hall-problem-demonstration-by-alkeos-souyoul/ssssspaj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/monty-hall-problem-demonstration-by-alkeos-souyoul/ssssspaj"/>
      <lastmod>2026-11-01T23:24:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflections-card-sort/ssssspap</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-card-sort/ssssspap"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-card-sort/ssssspap"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-card-sort/ssssspap"/>
      <lastmod>2026-11-02T03:16:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflections-card-sort/ssssspap</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflections-card-sort/ssssspap"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflections-card-sort/ssssspap"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflections-card-sort/ssssspap"/>
      <lastmod>2026-11-02T03:16:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/number-of-objects-addition-and-subtraction/ssssspaw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-of-objects-addition-and-subtraction/ssssspaw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-of-objects-addition-and-subtraction/ssssspaw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-of-objects-addition-and-subtraction/ssssspaw"/>
      <lastmod>2026-11-02T17:44:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/number-of-objects-addition-and-subtraction/ssssspaw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-of-objects-addition-and-subtraction/ssssspaw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-of-objects-addition-and-subtraction/ssssspaw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-of-objects-addition-and-subtraction/ssssspaw"/>
      <lastmod>2026-11-02T17:44:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplication-table/ssssspa6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-table/ssssspa6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-table/ssssspa6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-table/ssssspa6"/>
      <lastmod>2026-11-02T16:54:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplication-table/ssssspa6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-table/ssssspa6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-table/ssssspa6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-table/ssssspa6"/>
      <lastmod>2026-11-02T16:54:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-vectors/ssssspag</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-vectors/ssssspag"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-vectors/ssssspag"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-vectors/ssssspag"/>
      <lastmod>2026-11-01T21:33:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-vectors/ssssspag</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-vectors/ssssspag"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-vectors/ssssspag"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-vectors/ssssspag"/>
      <lastmod>2026-11-01T21:33:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivatives-and-tangents/ssssspa9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivatives-and-tangents/ssssspa9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivatives-and-tangents/ssssspa9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivatives-and-tangents/ssssspa9"/>
      <lastmod>2026-11-02T00:22:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivatives-and-tangents/ssssspa9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivatives-and-tangents/ssssspa9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivatives-and-tangents/ssssspa9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivatives-and-tangents/ssssspa9"/>
      <lastmod>2026-11-02T00:22:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-square-roots/ssssspae</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-square-roots/ssssspae"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-square-roots/ssssspae"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-square-roots/ssssspae"/>
      <lastmod>2026-11-02T15:42:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-square-roots/ssssspae</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-square-roots/ssssspae"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-square-roots/ssssspae"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-square-roots/ssssspae"/>
      <lastmod>2026-11-02T15:42:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/from-sphere-to-cube-and-back-3d-morphing-and-symmetry/ssssspav</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/from-sphere-to-cube-and-back-3d-morphing-and-symmetry/ssssspav"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/from-sphere-to-cube-and-back-3d-morphing-and-symmetry/ssssspav"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/from-sphere-to-cube-and-back-3d-morphing-and-symmetry/ssssspav"/>
      <lastmod>2026-11-02T02:46:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/from-sphere-to-cube-and-back-3d-morphing-and-symmetry/ssssspav</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/from-sphere-to-cube-and-back-3d-morphing-and-symmetry/ssssspav"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/from-sphere-to-cube-and-back-3d-morphing-and-symmetry/ssssspav"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/from-sphere-to-cube-and-back-3d-morphing-and-symmetry/ssssspav"/>
      <lastmod>2026-11-02T02:46:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-between-two-curves-by-betty-voon-wan-niu/ssssspa4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-between-two-curves-by-betty-voon-wan-niu/ssssspa4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-between-two-curves-by-betty-voon-wan-niu/ssssspa4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-between-two-curves-by-betty-voon-wan-niu/ssssspa4"/>
      <lastmod>2026-11-01T20:51:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-between-two-curves-by-betty-voon-wan-niu/ssssspa4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-between-two-curves-by-betty-voon-wan-niu/ssssspa4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-between-two-curves-by-betty-voon-wan-niu/ssssspa4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-between-two-curves-by-betty-voon-wan-niu/ssssspa4"/>
      <lastmod>2026-11-01T20:51:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/decimal-multiplication-geometric-demonstration/ssssspal</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-multiplication-geometric-demonstration/ssssspal"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-multiplication-geometric-demonstration/ssssspal"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-multiplication-geometric-demonstration/ssssspal"/>
      <lastmod>2026-11-01T23:37:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/decimal-multiplication-geometric-demonstration/ssssspal</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-multiplication-geometric-demonstration/ssssspal"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-multiplication-geometric-demonstration/ssssspal"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-multiplication-geometric-demonstration/ssssspal"/>
      <lastmod>2026-11-01T23:37:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-definition-demo/ssssspay</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-definition-demo/ssssspay"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-definition-demo/ssssspay"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-definition-demo/ssssspay"/>
      <lastmod>2026-11-02T17:13:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-definition-demo/ssssspay</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-definition-demo/ssssspay"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-definition-demo/ssssspay"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-definition-demo/ssssspay"/>
      <lastmod>2026-11-02T17:13:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotated-triangles/ssssspaa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotated-triangles/ssssspaa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotated-triangles/ssssspaa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotated-triangles/ssssspaa"/>
      <lastmod>2026-11-02T18:31:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotated-triangles/ssssspaa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotated-triangles/ssssspaa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotated-triangles/ssssspaa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotated-triangles/ssssspaa"/>
      <lastmod>2026-11-02T18:31:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-parallelogram-demo/ssssspac</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-parallelogram-demo/ssssspac"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-parallelogram-demo/ssssspac"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-parallelogram-demo/ssssspac"/>
      <lastmod>2026-11-02T03:05:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-parallelogram-demo/ssssspac</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-parallelogram-demo/ssssspac"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-parallelogram-demo/ssssspac"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-parallelogram-demo/ssssspac"/>
      <lastmod>2026-11-02T03:05:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quiz-on-directed-numbers-multiplication-and-division/ssssspar</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-on-directed-numbers-multiplication-and-division/ssssspar"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-on-directed-numbers-multiplication-and-division/ssssspar"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-on-directed-numbers-multiplication-and-division/ssssspar"/>
      <lastmod>2026-11-02T00:01:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quiz-on-directed-numbers-multiplication-and-division/ssssspar</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-on-directed-numbers-multiplication-and-division/ssssspar"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-on-directed-numbers-multiplication-and-division/ssssspar"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-on-directed-numbers-multiplication-and-division/ssssspar"/>
      <lastmod>2026-11-02T00:01:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/klein-bottle-with-unit-normal-vectors-and-m-bius-band/ssssspah</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/klein-bottle-with-unit-normal-vectors-and-m-bius-band/ssssspah"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/klein-bottle-with-unit-normal-vectors-and-m-bius-band/ssssspah"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/klein-bottle-with-unit-normal-vectors-and-m-bius-band/ssssspah"/>
      <lastmod>2026-11-01T21:15:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/klein-bottle-with-unit-normal-vectors-and-m-bius-band/ssssspah</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/klein-bottle-with-unit-normal-vectors-and-m-bius-band/ssssspah"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/klein-bottle-with-unit-normal-vectors-and-m-bius-band/ssssspah"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/klein-bottle-with-unit-normal-vectors-and-m-bius-band/ssssspah"/>
      <lastmod>2026-11-01T21:15:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definition-of-a-rhombus-by-kherdegen/ssssspat</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-of-a-rhombus-by-kherdegen/ssssspat"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-of-a-rhombus-by-kherdegen/ssssspat"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-of-a-rhombus-by-kherdegen/ssssspat"/>
      <lastmod>2026-11-02T17:02:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definition-of-a-rhombus-by-kherdegen/ssssspat</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-of-a-rhombus-by-kherdegen/ssssspat"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-of-a-rhombus-by-kherdegen/ssssspat"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-of-a-rhombus-by-kherdegen/ssssspat"/>
      <lastmod>2026-11-02T17:02:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-regular-nonagon-demonstration/ssssspax</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-regular-nonagon-demonstration/ssssspax"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-regular-nonagon-demonstration/ssssspax"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-regular-nonagon-demonstration/ssssspax"/>
      <lastmod>2026-11-01T23:25:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-regular-nonagon-demonstration/ssssspax</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-regular-nonagon-demonstration/ssssspax"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-regular-nonagon-demonstration/ssssspax"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-regular-nonagon-demonstration/ssssspax"/>
      <lastmod>2026-11-01T23:25:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lesson-10-4-inside-intersection/ssssspai</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lesson-10-4-inside-intersection/ssssspai"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lesson-10-4-inside-intersection/ssssspai"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lesson-10-4-inside-intersection/ssssspai"/>
      <lastmod>2026-11-02T09:48:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lesson-10-4-inside-intersection/ssssspai</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lesson-10-4-inside-intersection/ssssspai"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lesson-10-4-inside-intersection/ssssspai"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lesson-10-4-inside-intersection/ssssspai"/>
      <lastmod>2026-11-02T09:48:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/five-forces-and-friction-page-94/ssssspao</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/five-forces-and-friction-page-94/ssssspao"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/five-forces-and-friction-page-94/ssssspao"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/five-forces-and-friction-page-94/ssssspao"/>
      <lastmod>2026-11-02T16:36:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/five-forces-and-friction-page-94/ssssspao</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/five-forces-and-friction-page-94/ssssspao"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/five-forces-and-friction-page-94/ssssspao"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/five-forces-and-friction-page-94/ssssspao"/>
      <lastmod>2026-11-02T16:36:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-trapezoid-and-secant-line-demo/ssssspcs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-trapezoid-and-secant-line-demo/ssssspcs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-trapezoid-and-secant-line-demo/ssssspcs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-trapezoid-and-secant-line-demo/ssssspcs"/>
      <lastmod>2026-11-01T20:53:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-trapezoid-and-secant-line-demo/ssssspcs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-trapezoid-and-secant-line-demo/ssssspcs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-trapezoid-and-secant-line-demo/ssssspcs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-trapezoid-and-secant-line-demo/ssssspcs"/>
      <lastmod>2026-11-01T20:53:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/line-gradient-self-quiz/ssssspc7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-gradient-self-quiz/ssssspc7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-gradient-self-quiz/ssssspc7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-gradient-self-quiz/ssssspc7"/>
      <lastmod>2026-11-02T17:38:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/line-gradient-self-quiz/ssssspc7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-gradient-self-quiz/ssssspc7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-gradient-self-quiz/ssssspc7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-gradient-self-quiz/ssssspc7"/>
      <lastmod>2026-11-02T17:38:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/penrose-darts-and-kites-generator/ssssspcn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/penrose-darts-and-kites-generator/ssssspcn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/penrose-darts-and-kites-generator/ssssspcn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/penrose-darts-and-kites-generator/ssssspcn"/>
      <lastmod>2026-11-02T18:28:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/penrose-darts-and-kites-generator/ssssspcn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/penrose-darts-and-kites-generator/ssssspcn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/penrose-darts-and-kites-generator/ssssspcn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/penrose-darts-and-kites-generator/ssssspcn"/>
      <lastmod>2026-11-02T18:28:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-geometry-problem-example/ssssspc2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-problem-example/ssssspc2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-problem-example/ssssspc2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-problem-example/ssssspc2"/>
      <lastmod>2026-11-01T23:47:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-geometry-problem-example/ssssspc2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-problem-example/ssssspc2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-problem-example/ssssspc2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-problem-example/ssssspc2"/>
      <lastmod>2026-11-01T23:47:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/second-derivative-aasl-5-7-5-8-ai-hl-5-10/ssssspck</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/second-derivative-aasl-5-7-5-8-ai-hl-5-10/ssssspck"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/second-derivative-aasl-5-7-5-8-ai-hl-5-10/ssssspck"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/second-derivative-aasl-5-7-5-8-ai-hl-5-10/ssssspck"/>
      <lastmod>2026-11-01T23:52:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/second-derivative-aasl-5-7-5-8-ai-hl-5-10/ssssspck</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/second-derivative-aasl-5-7-5-8-ai-hl-5-10/ssssspck"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/second-derivative-aasl-5-7-5-8-ai-hl-5-10/ssssspck"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/second-derivative-aasl-5-7-5-8-ai-hl-5-10/ssssspck"/>
      <lastmod>2026-11-01T23:52:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/boxplots-interactive-demonstration-with-geogebra/ssssspcz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/boxplots-interactive-demonstration-with-geogebra/ssssspcz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/boxplots-interactive-demonstration-with-geogebra/ssssspcz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/boxplots-interactive-demonstration-with-geogebra/ssssspcz"/>
      <lastmod>2026-11-01T21:58:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/boxplots-interactive-demonstration-with-geogebra/ssssspcz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/boxplots-interactive-demonstration-with-geogebra/ssssspcz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/boxplots-interactive-demonstration-with-geogebra/ssssspcz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/boxplots-interactive-demonstration-with-geogebra/ssssspcz"/>
      <lastmod>2026-11-01T21:58:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equivalent-force-couple/ssssspc0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-force-couple/ssssspc0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-force-couple/ssssspc0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-force-couple/ssssspc0"/>
      <lastmod>2026-11-02T03:13:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equivalent-force-couple/ssssspc0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equivalent-force-couple/ssssspc0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equivalent-force-couple/ssssspc0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equivalent-force-couple/ssssspc0"/>
      <lastmod>2026-11-02T03:13:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-number-and-geometry-i-inequalities/ssssspcd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-and-geometry-i-inequalities/ssssspcd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-and-geometry-i-inequalities/ssssspcd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-and-geometry-i-inequalities/ssssspcd"/>
      <lastmod>2026-11-02T18:06:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-number-and-geometry-i-inequalities/ssssspcd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-and-geometry-i-inequalities/ssssspcd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-and-geometry-i-inequalities/ssssspcd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-and-geometry-i-inequalities/ssssspcd"/>
      <lastmod>2026-11-02T18:06:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/batman-curve-plot/ssssspcf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/batman-curve-plot/ssssspcf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/batman-curve-plot/ssssspcf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/batman-curve-plot/ssssspcf"/>
      <lastmod>2026-11-01T21:02:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/batman-curve-plot/ssssspcf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/batman-curve-plot/ssssspcf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/batman-curve-plot/ssssspcf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/batman-curve-plot/ssssspcf"/>
      <lastmod>2026-11-01T21:02:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangular-prism-by-bed-prasad-dhakal/ssssspc8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-prism-by-bed-prasad-dhakal/ssssspc8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-prism-by-bed-prasad-dhakal/ssssspc8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-prism-by-bed-prasad-dhakal/ssssspc8"/>
      <lastmod>2026-11-02T02:18:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangular-prism-by-bed-prasad-dhakal/ssssspc8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-prism-by-bed-prasad-dhakal/ssssspc8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-prism-by-bed-prasad-dhakal/ssssspc8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-prism-by-bed-prasad-dhakal/ssssspc8"/>
      <lastmod>2026-11-02T02:18:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/is-the-dinosaur-symmetrical/ssssspcu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/is-the-dinosaur-symmetrical/ssssspcu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/is-the-dinosaur-symmetrical/ssssspcu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/is-the-dinosaur-symmetrical/ssssspcu"/>
      <lastmod>2026-11-01T21:29:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/is-the-dinosaur-symmetrical/ssssspcu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/is-the-dinosaur-symmetrical/ssssspcu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/is-the-dinosaur-symmetrical/ssssspcu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/is-the-dinosaur-symmetrical/ssssspcu"/>
      <lastmod>2026-11-01T21:29:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/what-is-congruence-sss-side-side-side-theorem-demo/ssssspc5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/what-is-congruence-sss-side-side-side-theorem-demo/ssssspc5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/what-is-congruence-sss-side-side-side-theorem-demo/ssssspc5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/what-is-congruence-sss-side-side-side-theorem-demo/ssssspc5"/>
      <lastmod>2026-11-01T22:06:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/what-is-congruence-sss-side-side-side-theorem-demo/ssssspc5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/what-is-congruence-sss-side-side-side-theorem-demo/ssssspc5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/what-is-congruence-sss-side-side-side-theorem-demo/ssssspc5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/what-is-congruence-sss-side-side-side-theorem-demo/ssssspc5"/>
      <lastmod>2026-11-01T22:06:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-and-ordering-fractions/ssssspcb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-and-ordering-fractions/ssssspcb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-and-ordering-fractions/ssssspcb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-and-ordering-fractions/ssssspcb"/>
      <lastmod>2026-11-02T18:29:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-and-ordering-fractions/ssssspcb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-and-ordering-fractions/ssssspcb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-and-ordering-fractions/ssssspcb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-and-ordering-fractions/ssssspcb"/>
      <lastmod>2026-11-02T18:29:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construction-of-an-equilateral-triangle-inscribed-in-a-circle/ssssspc3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-an-equilateral-triangle-inscribed-in-a-circle/ssssspc3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-an-equilateral-triangle-inscribed-in-a-circle/ssssspc3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-an-equilateral-triangle-inscribed-in-a-circle/ssssspc3"/>
      <lastmod>2026-11-02T17:34:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construction-of-an-equilateral-triangle-inscribed-in-a-circle/ssssspc3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-an-equilateral-triangle-inscribed-in-a-circle/ssssspc3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-an-equilateral-triangle-inscribed-in-a-circle/ssssspc3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-an-equilateral-triangle-inscribed-in-a-circle/ssssspc3"/>
      <lastmod>2026-11-02T17:34:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-center/ssssspcq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-center/ssssspcq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-center/ssssspcq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-center/ssssspcq"/>
      <lastmod>2026-11-01T23:32:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-center/ssssspcq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-center/ssssspcq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-center/ssssspcq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-center/ssssspcq"/>
      <lastmod>2026-11-01T23:32:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definite-integral-as-a-sum-of-areas/ssssspc1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-as-a-sum-of-areas/ssssspc1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-as-a-sum-of-areas/ssssspc1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-as-a-sum-of-areas/ssssspc1"/>
      <lastmod>2026-11-02T18:43:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definite-integral-as-a-sum-of-areas/ssssspc1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-as-a-sum-of-areas/ssssspc1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-as-a-sum-of-areas/ssssspc1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-as-a-sum-of-areas/ssssspc1"/>
      <lastmod>2026-11-02T18:43:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-graphing/ssssspcm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-graphing/ssssspcm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-graphing/ssssspcm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-graphing/ssssspcm"/>
      <lastmod>2026-11-02T02:56:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-graphing/ssssspcm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-graphing/ssssspcm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-graphing/ssssspcm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-graphing/ssssspcm"/>
      <lastmod>2026-11-02T02:56:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-a-parallelogram-by-ayhan-ziya-z/ssssspcj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-parallelogram-by-ayhan-ziya-z/ssssspcj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-parallelogram-by-ayhan-ziya-z/ssssspcj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-parallelogram-by-ayhan-ziya-z/ssssspcj"/>
      <lastmod>2026-11-01T23:37:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-a-parallelogram-by-ayhan-ziya-z/ssssspcj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-parallelogram-by-ayhan-ziya-z/ssssspcj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-parallelogram-by-ayhan-ziya-z/ssssspcj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-parallelogram-by-ayhan-ziya-z/ssssspcj"/>
      <lastmod>2026-11-01T23:37:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-translation-geogebra-exercise/ssssspcp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-translation-geogebra-exercise/ssssspcp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-translation-geogebra-exercise/ssssspcp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-translation-geogebra-exercise/ssssspcp"/>
      <lastmod>2026-11-01T22:05:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-translation-geogebra-exercise/ssssspcp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-translation-geogebra-exercise/ssssspcp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-translation-geogebra-exercise/ssssspcp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-translation-geogebra-exercise/ssssspcp"/>
      <lastmod>2026-11-01T22:05:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/horizontal-hyperbolas/ssssspcw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-hyperbolas/ssssspcw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-hyperbolas/ssssspcw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-hyperbolas/ssssspcw"/>
      <lastmod>2026-11-02T18:57:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/horizontal-hyperbolas/ssssspcw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-hyperbolas/ssssspcw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-hyperbolas/ssssspcw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-hyperbolas/ssssspcw"/>
      <lastmod>2026-11-02T18:57:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/oblique-cone-by-elizabethdowns/ssssspc6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-cone-by-elizabethdowns/ssssspc6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-cone-by-elizabethdowns/ssssspc6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-cone-by-elizabethdowns/ssssspc6"/>
      <lastmod>2026-11-02T17:15:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/oblique-cone-by-elizabethdowns/ssssspc6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-cone-by-elizabethdowns/ssssspc6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-cone-by-elizabethdowns/ssssspc6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-cone-by-elizabethdowns/ssssspc6"/>
      <lastmod>2026-11-02T17:15:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cosine-law-geometric-construction-and-verification/ssssspcg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-law-geometric-construction-and-verification/ssssspcg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-law-geometric-construction-and-verification/ssssspcg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-law-geometric-construction-and-verification/ssssspcg"/>
      <lastmod>2026-11-02T00:32:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cosine-law-geometric-construction-and-verification/ssssspcg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-law-geometric-construction-and-verification/ssssspcg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-law-geometric-construction-and-verification/ssssspcg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-law-geometric-construction-and-verification/ssssspcg"/>
      <lastmod>2026-11-02T00:32:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/three-parameter-model-transformations-of-the-tetrahedron-extreme-distributions/ssssspc9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-parameter-model-transformations-of-the-tetrahedron-extreme-distributions/ssssspc9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-parameter-model-transformations-of-the-tetrahedron-extreme-distributions/ssssspc9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-parameter-model-transformations-of-the-tetrahedron-extreme-distributions/ssssspc9"/>
      <lastmod>2026-11-01T19:16:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/three-parameter-model-transformations-of-the-tetrahedron-extreme-distributions/ssssspc9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-parameter-model-transformations-of-the-tetrahedron-extreme-distributions/ssssspc9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-parameter-model-transformations-of-the-tetrahedron-extreme-distributions/ssssspc9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-parameter-model-transformations-of-the-tetrahedron-extreme-distributions/ssssspc9"/>
      <lastmod>2026-11-01T19:16:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilate-a-cone-about-its-central-axis/ssssspce</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilate-a-cone-about-its-central-axis/ssssspce"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilate-a-cone-about-its-central-axis/ssssspce"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilate-a-cone-about-its-central-axis/ssssspce"/>
      <lastmod>2026-11-01T23:22:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilate-a-cone-about-its-central-axis/ssssspce</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilate-a-cone-about-its-central-axis/ssssspce"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilate-a-cone-about-its-central-axis/ssssspce"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilate-a-cone-about-its-central-axis/ssssspce"/>
      <lastmod>2026-11-01T23:22:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/line-symmetry/ssssspcv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-symmetry/ssssspcv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-symmetry/ssssspcv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-symmetry/ssssspcv"/>
      <lastmod>2026-11-02T15:04:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/line-symmetry/ssssspcv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-symmetry/ssssspcv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-symmetry/ssssspcv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-symmetry/ssssspcv"/>
      <lastmod>2026-11-02T15:04:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-1/ssssspc4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-1/ssssspc4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-1/ssssspc4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-1/ssssspc4"/>
      <lastmod>2026-11-02T18:41:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-1/ssssspc4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-1/ssssspc4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-1/ssssspc4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-1/ssssspc4"/>
      <lastmod>2026-11-02T18:41:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-simulation-sssssuhs/ssssspcl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-simulation-sssssuhs/ssssspcl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temperature-vs-time-multiplication-simulation-sssssuhs/ssssspcl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-simulation-sssssuhs/ssssspcl"/>
      <lastmod>2026-11-02T18:33:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/temperature-vs-time-multiplication-simulation-sssssuhs/ssssspcl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-simulation-sssssuhs/ssssspcl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temperature-vs-time-multiplication-simulation-sssssuhs/ssssspcl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-simulation-sssssuhs/ssssspcl"/>
      <lastmod>2026-11-02T18:33:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/histogram-reflex-game/ssssspcy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-reflex-game/ssssspcy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-reflex-game/ssssspcy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-reflex-game/ssssspcy"/>
      <lastmod>2026-11-02T03:08:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/histogram-reflex-game/ssssspcy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-reflex-game/ssssspcy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-reflex-game/ssssspcy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-reflex-game/ssssspcy"/>
      <lastmod>2026-11-02T03:08:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-geometric-construction-by-cemccourseware/ssssspca</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-geometric-construction-by-cemccourseware/ssssspca"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-geometric-construction-by-cemccourseware/ssssspca"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-geometric-construction-by-cemccourseware/ssssspca"/>
      <lastmod>2026-11-02T00:45:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-geometric-construction-by-cemccourseware/ssssspca</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-geometric-construction-by-cemccourseware/ssssspca"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-geometric-construction-by-cemccourseware/ssssspca"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-geometric-construction-by-cemccourseware/ssssspca"/>
      <lastmod>2026-11-02T00:45:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animation-282-circle-and-angle-interaction-demo/ssssspcc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-282-circle-and-angle-interaction-demo/ssssspcc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-282-circle-and-angle-interaction-demo/ssssspcc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-282-circle-and-angle-interaction-demo/ssssspcc"/>
      <lastmod>2026-11-02T17:01:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animation-282-circle-and-angle-interaction-demo/ssssspcc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-282-circle-and-angle-interaction-demo/ssssspcc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-282-circle-and-angle-interaction-demo/ssssspcc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-282-circle-and-angle-interaction-demo/ssssspcc"/>
      <lastmod>2026-11-02T17:01:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-translations-in-butterflies-windmills-and-wallpaper/ssssspcr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-translations-in-butterflies-windmills-and-wallpaper/ssssspcr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-translations-in-butterflies-windmills-and-wallpaper/ssssspcr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-translations-in-butterflies-windmills-and-wallpaper/ssssspcr"/>
      <lastmod>2026-11-01T21:20:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-translations-in-butterflies-windmills-and-wallpaper/ssssspcr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-translations-in-butterflies-windmills-and-wallpaper/ssssspcr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-translations-in-butterflies-windmills-and-wallpaper/ssssspcr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-translations-in-butterflies-windmills-and-wallpaper/ssssspcr"/>
      <lastmod>2026-11-01T21:20:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/piece-wise-function-and-infinite-limits-demo/ssssspch</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/piece-wise-function-and-infinite-limits-demo/ssssspch"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/piece-wise-function-and-infinite-limits-demo/ssssspch"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/piece-wise-function-and-infinite-limits-demo/ssssspch"/>
      <lastmod>2026-11-02T17:03:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/piece-wise-function-and-infinite-limits-demo/ssssspch</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/piece-wise-function-and-infinite-limits-demo/ssssspch"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/piece-wise-function-and-infinite-limits-demo/ssssspch"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/piece-wise-function-and-infinite-limits-demo/ssssspch"/>
      <lastmod>2026-11-02T17:03:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/standardizing-scores/ssssspct</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standardizing-scores/ssssspct"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standardizing-scores/ssssspct"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standardizing-scores/ssssspct"/>
      <lastmod>2026-11-02T16:50:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/standardizing-scores/ssssspct</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standardizing-scores/ssssspct"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standardizing-scores/ssssspct"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standardizing-scores/ssssspct"/>
      <lastmod>2026-11-02T16:50:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-addition-exploration/ssssspcx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-addition-exploration/ssssspcx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-addition-exploration/ssssspcx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-addition-exploration/ssssspcx"/>
      <lastmod>2026-11-01T21:38:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-addition-exploration/ssssspcx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-addition-exploration/ssssspcx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-addition-exploration/ssssspcx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-addition-exploration/ssssspcx"/>
      <lastmod>2026-11-01T21:38:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-and-transformation-of-the-vald-s-investment-logo/ssssspci</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-and-transformation-of-the-vald-s-investment-logo/ssssspci"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-and-transformation-of-the-vald-s-investment-logo/ssssspci"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-and-transformation-of-the-vald-s-investment-logo/ssssspci"/>
      <lastmod>2026-11-01T19:23:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-and-transformation-of-the-vald-s-investment-logo/ssssspci</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-and-transformation-of-the-vald-s-investment-logo/ssssspci"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-and-transformation-of-the-vald-s-investment-logo/ssssspci"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-and-transformation-of-the-vald-s-investment-logo/ssssspci"/>
      <lastmod>2026-11-01T19:23:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mensuration-of-prism/ssssspco</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mensuration-of-prism/ssssspco"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mensuration-of-prism/ssssspco"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mensuration-of-prism/ssssspco"/>
      <lastmod>2026-11-01T23:56:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mensuration-of-prism/ssssspco</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mensuration-of-prism/ssssspco"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mensuration-of-prism/ssssspco"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mensuration-of-prism/ssssspco"/>
      <lastmod>2026-11-01T23:56:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-slope-illustration/sssssprs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-slope-illustration/sssssprs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-slope-illustration/sssssprs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-slope-illustration/sssssprs"/>
      <lastmod>2026-11-02T02:29:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-slope-illustration/sssssprs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-slope-illustration/sssssprs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-slope-illustration/sssssprs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-slope-illustration/sssssprs"/>
      <lastmod>2026-11-02T02:29:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ring-and-circle/ssssspr7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ring-and-circle/ssssspr7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ring-and-circle/ssssspr7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ring-and-circle/ssssspr7"/>
      <lastmod>2026-11-02T18:22:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ring-and-circle/ssssspr7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ring-and-circle/ssssspr7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ring-and-circle/ssssspr7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ring-and-circle/ssssspr7"/>
      <lastmod>2026-11-02T18:22:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/smallest-ellipse-circumscribed-in-a-quadrilateral/sssssprn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/smallest-ellipse-circumscribed-in-a-quadrilateral/sssssprn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/smallest-ellipse-circumscribed-in-a-quadrilateral/sssssprn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/smallest-ellipse-circumscribed-in-a-quadrilateral/sssssprn"/>
      <lastmod>2026-11-02T12:47:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/smallest-ellipse-circumscribed-in-a-quadrilateral/sssssprn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/smallest-ellipse-circumscribed-in-a-quadrilateral/sssssprn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/smallest-ellipse-circumscribed-in-a-quadrilateral/sssssprn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/smallest-ellipse-circumscribed-in-a-quadrilateral/sssssprn"/>
      <lastmod>2026-11-02T12:47:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-trigonometric-derivatives-tangent-slopes-and-derivative-functions/ssssspr2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-trigonometric-derivatives-tangent-slopes-and-derivative-functions/ssssspr2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-trigonometric-derivatives-tangent-slopes-and-derivative-functions/ssssspr2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-trigonometric-derivatives-tangent-slopes-and-derivative-functions/ssssspr2"/>
      <lastmod>2026-11-02T18:49:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-trigonometric-derivatives-tangent-slopes-and-derivative-functions/ssssspr2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-trigonometric-derivatives-tangent-slopes-and-derivative-functions/ssssspr2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-trigonometric-derivatives-tangent-slopes-and-derivative-functions/ssssspr2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-trigonometric-derivatives-tangent-slopes-and-derivative-functions/ssssspr2"/>
      <lastmod>2026-11-02T18:49:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/effects-of-dilations-on-angles/sssssprk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/effects-of-dilations-on-angles/sssssprk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/effects-of-dilations-on-angles/sssssprk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/effects-of-dilations-on-angles/sssssprk"/>
      <lastmod>2026-11-01T21:49:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/effects-of-dilations-on-angles/sssssprk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/effects-of-dilations-on-angles/sssssprk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/effects-of-dilations-on-angles/sssssprk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/effects-of-dilations-on-angles/sssssprk"/>
      <lastmod>2026-11-01T21:49:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-7-3-10-practice-distinguishing-circumference-and-area/sssssprz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-3-10-practice-distinguishing-circumference-and-area/sssssprz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-3-10-practice-distinguishing-circumference-and-area/sssssprz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-3-10-practice-distinguishing-circumference-and-area/sssssprz"/>
      <lastmod>2026-11-02T10:37:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-7-3-10-practice-distinguishing-circumference-and-area/sssssprz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-3-10-practice-distinguishing-circumference-and-area/sssssprz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-3-10-practice-distinguishing-circumference-and-area/sssssprz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-3-10-practice-distinguishing-circumference-and-area/sssssprz"/>
      <lastmod>2026-11-02T10:37:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/collinear-points-problem/ssssspr0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/collinear-points-problem/ssssspr0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/collinear-points-problem/ssssspr0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/collinear-points-problem/ssssspr0"/>
      <lastmod>2026-11-01T23:46:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/collinear-points-problem/ssssspr0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/collinear-points-problem/ssssspr0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/collinear-points-problem/ssssspr0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/collinear-points-problem/ssssspr0"/>
      <lastmod>2026-11-01T23:46:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dissecting-a-cube-into-three-parts/sssssprd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dissecting-a-cube-into-three-parts/sssssprd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dissecting-a-cube-into-three-parts/sssssprd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dissecting-a-cube-into-three-parts/sssssprd"/>
      <lastmod>2026-11-01T23:28:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dissecting-a-cube-into-three-parts/sssssprd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dissecting-a-cube-into-three-parts/sssssprd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dissecting-a-cube-into-three-parts/sssssprd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dissecting-a-cube-into-three-parts/sssssprd"/>
      <lastmod>2026-11-01T23:28:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/build-a-house-construct-a-square-given-one-side/sssssprf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/build-a-house-construct-a-square-given-one-side/sssssprf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/build-a-house-construct-a-square-given-one-side/sssssprf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/build-a-house-construct-a-square-given-one-side/sssssprf"/>
      <lastmod>2026-11-01T21:22:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/build-a-house-construct-a-square-given-one-side/sssssprf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/build-a-house-construct-a-square-given-one-side/sssssprf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/build-a-house-construct-a-square-given-one-side/sssssprf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/build-a-house-construct-a-square-given-one-side/sssssprf"/>
      <lastmod>2026-11-01T21:22:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstrating-area-of-a-rhombus/ssssspr8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-area-of-a-rhombus/ssssspr8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-area-of-a-rhombus/ssssspr8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-area-of-a-rhombus/ssssspr8"/>
      <lastmod>2026-11-02T15:10:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstrating-area-of-a-rhombus/ssssspr8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-area-of-a-rhombus/ssssspr8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-area-of-a-rhombus/ssssspr8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-area-of-a-rhombus/ssssspr8"/>
      <lastmod>2026-11-02T15:10:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-ssa-condition-for-triangles/ssssspru</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-ssa-condition-for-triangles/ssssspru"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-ssa-condition-for-triangles/ssssspru"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-ssa-condition-for-triangles/ssssspru"/>
      <lastmod>2026-11-02T03:02:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-ssa-condition-for-triangles/ssssspru</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-ssa-condition-for-triangles/ssssspru"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-ssa-condition-for-triangles/ssssspru"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-ssa-condition-for-triangles/ssssspru"/>
      <lastmod>2026-11-02T03:02:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/phantom-graph-visualization-of-fourth-degree-polynomial-in-complex-plane/ssssspr5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-visualization-of-fourth-degree-polynomial-in-complex-plane/ssssspr5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-visualization-of-fourth-degree-polynomial-in-complex-plane/ssssspr5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-visualization-of-fourth-degree-polynomial-in-complex-plane/ssssspr5"/>
      <lastmod>2026-11-02T00:33:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/phantom-graph-visualization-of-fourth-degree-polynomial-in-complex-plane/ssssspr5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-visualization-of-fourth-degree-polynomial-in-complex-plane/ssssspr5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-visualization-of-fourth-degree-polynomial-in-complex-plane/ssssspr5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-visualization-of-fourth-degree-polynomial-in-complex-plane/ssssspr5"/>
      <lastmod>2026-11-02T00:33:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simplify-fractions-interactive-practice-with-random-generation/sssssprb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simplify-fractions-interactive-practice-with-random-generation/sssssprb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simplify-fractions-interactive-practice-with-random-generation/sssssprb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simplify-fractions-interactive-practice-with-random-generation/sssssprb"/>
      <lastmod>2026-11-02T15:40:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simplify-fractions-interactive-practice-with-random-generation/sssssprb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simplify-fractions-interactive-practice-with-random-generation/sssssprb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simplify-fractions-interactive-practice-with-random-generation/sssssprb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simplify-fractions-interactive-practice-with-random-generation/sssssprb"/>
      <lastmod>2026-11-02T15:40:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/customizing-the-3d-graphics-view-using-the-style-bar-for-solid-geometry/ssssspr3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/customizing-the-3d-graphics-view-using-the-style-bar-for-solid-geometry/ssssspr3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/customizing-the-3d-graphics-view-using-the-style-bar-for-solid-geometry/ssssspr3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/customizing-the-3d-graphics-view-using-the-style-bar-for-solid-geometry/ssssspr3"/>
      <lastmod>2026-11-01T21:51:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/customizing-the-3d-graphics-view-using-the-style-bar-for-solid-geometry/ssssspr3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/customizing-the-3d-graphics-view-using-the-style-bar-for-solid-geometry/ssssspr3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/customizing-the-3d-graphics-view-using-the-style-bar-for-solid-geometry/ssssspr3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/customizing-the-3d-graphics-view-using-the-style-bar-for-solid-geometry/ssssspr3"/>
      <lastmod>2026-11-01T21:51:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/convergent-lens-ray-path-demonstration/sssssprq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/convergent-lens-ray-path-demonstration/sssssprq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/convergent-lens-ray-path-demonstration/sssssprq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/convergent-lens-ray-path-demonstration/sssssprq"/>
      <lastmod>2026-11-01T19:27:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/convergent-lens-ray-path-demonstration/sssssprq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/convergent-lens-ray-path-demonstration/sssssprq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/convergent-lens-ray-path-demonstration/sssssprq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/convergent-lens-ray-path-demonstration/sssssprq"/>
      <lastmod>2026-11-01T19:27:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pear-curves/ssssspr1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pear-curves/ssssspr1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pear-curves/ssssspr1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pear-curves/ssssspr1"/>
      <lastmod>2026-11-01T23:08:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pear-curves/ssssspr1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pear-curves/ssssspr1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pear-curves/ssssspr1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pear-curves/ssssspr1"/>
      <lastmod>2026-11-01T23:08:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-power-of-super-symmetry/sssssprm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-power-of-super-symmetry/sssssprm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-power-of-super-symmetry/sssssprm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-power-of-super-symmetry/sssssprm"/>
      <lastmod>2026-11-01T22:05:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-power-of-super-symmetry/sssssprm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-power-of-super-symmetry/sssssprm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-power-of-super-symmetry/sssssprm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-power-of-super-symmetry/sssssprm"/>
      <lastmod>2026-11-01T22:05:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-scalar-multiplication-demo/sssssprj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-scalar-multiplication-demo/sssssprj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-scalar-multiplication-demo/sssssprj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-scalar-multiplication-demo/sssssprj"/>
      <lastmod>2026-11-01T23:33:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-scalar-multiplication-demo/sssssprj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-scalar-multiplication-demo/sssssprj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-scalar-multiplication-demo/sssssprj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-scalar-multiplication-demo/sssssprj"/>
      <lastmod>2026-11-01T23:33:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotational-model-cross-sections/sssssprp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-model-cross-sections/sssssprp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-model-cross-sections/sssssprp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-model-cross-sections/sssssprp"/>
      <lastmod>2026-11-02T09:37:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotational-model-cross-sections/sssssprp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-model-cross-sections/sssssprp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-model-cross-sections/sssssprp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-model-cross-sections/sssssprp"/>
      <lastmod>2026-11-02T09:37:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangles-and-fractal-geometry/sssssprw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangles-and-fractal-geometry/sssssprw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangles-and-fractal-geometry/sssssprw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangles-and-fractal-geometry/sssssprw"/>
      <lastmod>2026-11-02T17:54:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangles-and-fractal-geometry/sssssprw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangles-and-fractal-geometry/sssssprw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangles-and-fractal-geometry/sssssprw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangles-and-fractal-geometry/sssssprw"/>
      <lastmod>2026-11-02T17:54:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definition-of-parabola/ssssspr6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-of-parabola/ssssspr6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-of-parabola/ssssspr6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-of-parabola/ssssspr6"/>
      <lastmod>2026-11-01T21:20:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definition-of-parabola/ssssspr6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-of-parabola/ssssspr6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-of-parabola/ssssspr6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-of-parabola/ssssspr6"/>
      <lastmod>2026-11-01T21:20:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/points-lines-and-planes-construction-by-angelique-errett/sssssprg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/points-lines-and-planes-construction-by-angelique-errett/sssssprg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/points-lines-and-planes-construction-by-angelique-errett/sssssprg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/points-lines-and-planes-construction-by-angelique-errett/sssssprg"/>
      <lastmod>2026-11-01T21:26:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/points-lines-and-planes-construction-by-angelique-errett/sssssprg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/points-lines-and-planes-construction-by-angelique-errett/sssssprg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/points-lines-and-planes-construction-by-angelique-errett/sssssprg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/points-lines-and-planes-construction-by-angelique-errett/sssssprg"/>
      <lastmod>2026-11-01T21:26:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-distribution-image-generator/ssssspr9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-image-generator/ssssspr9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-image-generator/ssssspr9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-image-generator/ssssspr9"/>
      <lastmod>2026-11-02T17:47:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-distribution-image-generator/ssssspr9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-image-generator/ssssspr9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-image-generator/ssssspr9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-image-generator/ssssspr9"/>
      <lastmod>2026-11-02T17:47:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-calculation-geometric-demonstration/ssssspre</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-calculation-geometric-demonstration/ssssspre"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-calculation-geometric-demonstration/ssssspre"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-calculation-geometric-demonstration/ssssspre"/>
      <lastmod>2026-11-01T23:18:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-calculation-geometric-demonstration/ssssspre</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-calculation-geometric-demonstration/ssssspre"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-calculation-geometric-demonstration/ssssspre"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-calculation-geometric-demonstration/ssssspre"/>
      <lastmod>2026-11-01T23:18:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coloring-in-geogebra/sssssprv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coloring-in-geogebra/sssssprv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coloring-in-geogebra/sssssprv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coloring-in-geogebra/sssssprv"/>
      <lastmod>2026-11-01T21:01:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coloring-in-geogebra/sssssprv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coloring-in-geogebra/sssssprv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coloring-in-geogebra/sssssprv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coloring-in-geogebra/sssssprv"/>
      <lastmod>2026-11-01T21:01:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/oblique-cylinder-by-alex-smith/ssssspr4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-cylinder-by-alex-smith/ssssspr4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-cylinder-by-alex-smith/ssssspr4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-cylinder-by-alex-smith/ssssspr4"/>
      <lastmod>2026-11-02T18:14:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/oblique-cylinder-by-alex-smith/ssssspr4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oblique-cylinder-by-alex-smith/ssssspr4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oblique-cylinder-by-alex-smith/ssssspr4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oblique-cylinder-by-alex-smith/ssssspr4"/>
      <lastmod>2026-11-02T18:14:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-exercise-answer-feedback-template-tick-cross-and-smileys/sssssprl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-exercise-answer-feedback-template-tick-cross-and-smileys/sssssprl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-exercise-answer-feedback-template-tick-cross-and-smileys/sssssprl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-exercise-answer-feedback-template-tick-cross-and-smileys/sssssprl"/>
      <lastmod>2026-11-01T19:15:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-exercise-answer-feedback-template-tick-cross-and-smileys/sssssprl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-exercise-answer-feedback-template-tick-cross-and-smileys/sssssprl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-exercise-answer-feedback-template-tick-cross-and-smileys/sssssprl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-exercise-answer-feedback-template-tick-cross-and-smileys/sssssprl"/>
      <lastmod>2026-11-01T19:15:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/paula-s-friezes/ssssspry</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/paula-s-friezes/ssssspry"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/paula-s-friezes/ssssspry"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/paula-s-friezes/ssssspry"/>
      <lastmod>2026-11-01T20:46:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/paula-s-friezes/ssssspry</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/paula-s-friezes/ssssspry"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/paula-s-friezes/ssssspry"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/paula-s-friezes/ssssspry"/>
      <lastmod>2026-11-01T20:46:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-rule-part-4-plane-vectors-and-geometric-construction/ssssspra</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-rule-part-4-plane-vectors-and-geometric-construction/ssssspra"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-rule-part-4-plane-vectors-and-geometric-construction/ssssspra"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-rule-part-4-plane-vectors-and-geometric-construction/ssssspra"/>
      <lastmod>2026-11-02T13:10:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-rule-part-4-plane-vectors-and-geometric-construction/ssssspra</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-rule-part-4-plane-vectors-and-geometric-construction/ssssspra"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-rule-part-4-plane-vectors-and-geometric-construction/ssssspra"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-rule-part-4-plane-vectors-and-geometric-construction/ssssspra"/>
      <lastmod>2026-11-02T13:10:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-construction-by-hatchtag-resources/sssssprc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-construction-by-hatchtag-resources/sssssprc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-construction-by-hatchtag-resources/sssssprc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-construction-by-hatchtag-resources/sssssprc"/>
      <lastmod>2026-11-02T00:28:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-construction-by-hatchtag-resources/sssssprc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-construction-by-hatchtag-resources/sssssprc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-construction-by-hatchtag-resources/sssssprc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-construction-by-hatchtag-resources/sssssprc"/>
      <lastmod>2026-11-02T00:28:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-law-demonstration-by-d-vasu-raj/sssssprr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-law-demonstration-by-d-vasu-raj/sssssprr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-law-demonstration-by-d-vasu-raj/sssssprr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-law-demonstration-by-d-vasu-raj/sssssprr"/>
      <lastmod>2026-11-02T17:43:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-law-demonstration-by-d-vasu-raj/sssssprr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-law-demonstration-by-d-vasu-raj/sssssprr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-law-demonstration-by-d-vasu-raj/sssssprr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-law-demonstration-by-d-vasu-raj/sssssprr"/>
      <lastmod>2026-11-02T17:43:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/using-sequence-command-to-construct-polygons-and-geometric-objects/sssssprh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-sequence-command-to-construct-polygons-and-geometric-objects/sssssprh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-sequence-command-to-construct-polygons-and-geometric-objects/sssssprh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-sequence-command-to-construct-polygons-and-geometric-objects/sssssprh"/>
      <lastmod>2026-11-02T00:13:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/using-sequence-command-to-construct-polygons-and-geometric-objects/sssssprh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-sequence-command-to-construct-polygons-and-geometric-objects/sssssprh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-sequence-command-to-construct-polygons-and-geometric-objects/sssssprh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-sequence-command-to-construct-polygons-and-geometric-objects/sssssprh"/>
      <lastmod>2026-11-02T00:13:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-characteristics-demo/sssssprt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-characteristics-demo/sssssprt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-characteristics-demo/sssssprt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-characteristics-demo/sssssprt"/>
      <lastmod>2026-11-01T23:28:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-characteristics-demo/sssssprt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-characteristics-demo/sssssprt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-characteristics-demo/sssssprt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-characteristics-demo/sssssprt"/>
      <lastmod>2026-11-01T23:28:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-tiling-puzzle/sssssprx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-tiling-puzzle/sssssprx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-tiling-puzzle/sssssprx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-tiling-puzzle/sssssprx"/>
      <lastmod>2026-11-02T17:53:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-tiling-puzzle/sssssprx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-tiling-puzzle/sssssprx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-tiling-puzzle/sssssprx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-tiling-puzzle/sssssprx"/>
      <lastmod>2026-11-02T17:53:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-complex-roots-circles-vectors-and-fractal-geometry/ssssspri</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-complex-roots-circles-vectors-and-fractal-geometry/ssssspri"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-complex-roots-circles-vectors-and-fractal-geometry/ssssspri"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-complex-roots-circles-vectors-and-fractal-geometry/ssssspri"/>
      <lastmod>2026-11-02T17:49:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-complex-roots-circles-vectors-and-fractal-geometry/ssssspri</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-complex-roots-circles-vectors-and-fractal-geometry/ssssspri"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-complex-roots-circles-vectors-and-fractal-geometry/ssssspri"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-complex-roots-circles-vectors-and-fractal-geometry/ssssspri"/>
      <lastmod>2026-11-02T17:49:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-in-her-str-u-park/ssssspro</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-in-her-str-u-park/ssssspro"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-in-her-str-u-park/ssssspro"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-in-her-str-u-park/ssssspro"/>
      <lastmod>2026-11-02T09:46:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-in-her-str-u-park/ssssspro</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-in-her-str-u-park/ssssspro"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-in-her-str-u-park/ssssspro"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-in-her-str-u-park/ssssspro"/>
      <lastmod>2026-11-02T09:46:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sss-congruence-theorem/sssssphs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-congruence-theorem/sssssphs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-congruence-theorem/sssssphs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-congruence-theorem/sssssphs"/>
      <lastmod>2026-11-02T11:55:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sss-congruence-theorem/sssssphs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-congruence-theorem/sssssphs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-congruence-theorem/sssssphs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-congruence-theorem/sssssphs"/>
      <lastmod>2026-11-02T11:55:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/randomly-pick-a-card-and-replace/sssssph7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/randomly-pick-a-card-and-replace/sssssph7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/randomly-pick-a-card-and-replace/sssssph7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/randomly-pick-a-card-and-replace/sssssph7"/>
      <lastmod>2026-11-02T16:42:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/randomly-pick-a-card-and-replace/sssssph7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/randomly-pick-a-card-and-replace/sssssph7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/randomly-pick-a-card-and-replace/sssssph7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/randomly-pick-a-card-and-replace/sssssph7"/>
      <lastmod>2026-11-02T16:42:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-pythagorean-theorem-dynamic-geometry-interactive/sssssphn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-pythagorean-theorem-dynamic-geometry-interactive/sssssphn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-pythagorean-theorem-dynamic-geometry-interactive/sssssphn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-pythagorean-theorem-dynamic-geometry-interactive/sssssphn"/>
      <lastmod>2026-11-02T00:52:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-pythagorean-theorem-dynamic-geometry-interactive/sssssphn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-pythagorean-theorem-dynamic-geometry-interactive/sssssphn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-pythagorean-theorem-dynamic-geometry-interactive/sssssphn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-pythagorean-theorem-dynamic-geometry-interactive/sssssphn"/>
      <lastmod>2026-11-02T00:52:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-of-triangle-jordyn/sssssph2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-triangle-jordyn/sssssph2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-triangle-jordyn/sssssph2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-triangle-jordyn/sssssph2"/>
      <lastmod>2026-11-01T23:24:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-of-triangle-jordyn/sssssph2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-triangle-jordyn/sssssph2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-triangle-jordyn/sssssph2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-triangle-jordyn/sssssph2"/>
      <lastmod>2026-11-01T23:24:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conic-sections-by-tim-sweeney/sssssphk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-sections-by-tim-sweeney/sssssphk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-sections-by-tim-sweeney/sssssphk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-by-tim-sweeney/sssssphk"/>
      <lastmod>2026-11-02T18:10:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conic-sections-by-tim-sweeney/sssssphk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-sections-by-tim-sweeney/sssssphk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-sections-by-tim-sweeney/sssssphk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-by-tim-sweeney/sssssphk"/>
      <lastmod>2026-11-02T18:10:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-template-with-investigation/sssssphz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-template-with-investigation/sssssphz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-template-with-investigation/sssssphz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-template-with-investigation/sssssphz"/>
      <lastmod>2026-11-02T15:49:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-template-with-investigation/sssssphz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-template-with-investigation/sssssphz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-template-with-investigation/sssssphz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-template-with-investigation/sssssphz"/>
      <lastmod>2026-11-02T15:49:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/value-tables-and-rate-of-change-task/sssssph0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/value-tables-and-rate-of-change-task/sssssph0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/value-tables-and-rate-of-change-task/sssssph0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/value-tables-and-rate-of-change-task/sssssph0"/>
      <lastmod>2026-11-02T15:04:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/value-tables-and-rate-of-change-task/sssssph0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/value-tables-and-rate-of-change-task/sssssph0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/value-tables-and-rate-of-change-task/sssssph0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/value-tables-and-rate-of-change-task/sssssph0"/>
      <lastmod>2026-11-02T15:04:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drop-sphere-through-plane-dynamic-cross-section-exploration/sssssphd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drop-sphere-through-plane-dynamic-cross-section-exploration/sssssphd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drop-sphere-through-plane-dynamic-cross-section-exploration/sssssphd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drop-sphere-through-plane-dynamic-cross-section-exploration/sssssphd"/>
      <lastmod>2026-11-01T22:05:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drop-sphere-through-plane-dynamic-cross-section-exploration/sssssphd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drop-sphere-through-plane-dynamic-cross-section-exploration/sssssphd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drop-sphere-through-plane-dynamic-cross-section-exploration/sssssphd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drop-sphere-through-plane-dynamic-cross-section-exploration/sssssphd"/>
      <lastmod>2026-11-01T22:05:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-equation/sssssphf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-equation/sssssphf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-equation/sssssphf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-equation/sssssphf"/>
      <lastmod>2026-11-02T12:09:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-equation/sssssphf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-equation/sssssphf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-equation/sssssphf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-equation/sssssphf"/>
      <lastmod>2026-11-02T12:09:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-demonstration-of-trigonometric-circle/sssssph8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-trigonometric-circle/sssssph8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-trigonometric-circle/sssssph8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-trigonometric-circle/sssssph8"/>
      <lastmod>2026-11-02T13:16:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-demonstration-of-trigonometric-circle/sssssph8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-trigonometric-circle/sssssph8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-trigonometric-circle/sssssph8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-trigonometric-circle/sssssph8"/>
      <lastmod>2026-11-02T13:16:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-task/sssssphu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-task/sssssphu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-task/sssssphu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-task/sssssphu"/>
      <lastmod>2026-11-01T19:19:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-task/sssssphu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-task/sssssphu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-task/sssssphu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-task/sssssphu"/>
      <lastmod>2026-11-01T19:19:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadric-surfaces-demo-by-joshua-link/sssssph5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadric-surfaces-demo-by-joshua-link/sssssph5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadric-surfaces-demo-by-joshua-link/sssssph5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadric-surfaces-demo-by-joshua-link/sssssph5"/>
      <lastmod>2026-11-02T00:26:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadric-surfaces-demo-by-joshua-link/sssssph5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadric-surfaces-demo-by-joshua-link/sssssph5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadric-surfaces-demo-by-joshua-link/sssssph5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadric-surfaces-demo-by-joshua-link/sssssph5"/>
      <lastmod>2026-11-02T00:26:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-percentages-by-shar-gayangos/sssssphb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-percentages-by-shar-gayangos/sssssphb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-percentages-by-shar-gayangos/sssssphb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-percentages-by-shar-gayangos/sssssphb"/>
      <lastmod>2026-11-01T23:19:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-percentages-by-shar-gayangos/sssssphb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-percentages-by-shar-gayangos/sssssphb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-percentages-by-shar-gayangos/sssssphb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-percentages-by-shar-gayangos/sssssphb"/>
      <lastmod>2026-11-01T23:19:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-without-words-limit-of-sin-3x-sin-x-as-x-0/sssssph3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-without-words-limit-of-sin-3x-sin-x-as-x-0/sssssph3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-without-words-limit-of-sin-3x-sin-x-as-x-0/sssssph3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-without-words-limit-of-sin-3x-sin-x-as-x-0/sssssph3"/>
      <lastmod>2026-11-01T21:06:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-without-words-limit-of-sin-3x-sin-x-as-x-0/sssssph3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-without-words-limit-of-sin-3x-sin-x-as-x-0/sssssph3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-without-words-limit-of-sin-3x-sin-x-as-x-0/sssssph3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-without-words-limit-of-sin-3x-sin-x-as-x-0/sssssph3"/>
      <lastmod>2026-11-01T21:06:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-focus-proof/sssssphq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-focus-proof/sssssphq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-focus-proof/sssssphq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-focus-proof/sssssphq"/>
      <lastmod>2026-11-02T02:51:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-focus-proof/sssssphq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-focus-proof/sssssphq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-focus-proof/sssssphq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-focus-proof/sssssphq"/>
      <lastmod>2026-11-02T02:51:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/percentage-equivalent-fraction-factor-100/sssssph1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/percentage-equivalent-fraction-factor-100/sssssph1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/percentage-equivalent-fraction-factor-100/sssssph1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/percentage-equivalent-fraction-factor-100/sssssph1"/>
      <lastmod>2026-11-01T21:09:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/percentage-equivalent-fraction-factor-100/sssssph1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/percentage-equivalent-fraction-factor-100/sssssph1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/percentage-equivalent-fraction-factor-100/sssssph1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/percentage-equivalent-fraction-factor-100/sssssph1"/>
      <lastmod>2026-11-01T21:09:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylindrical-coordinates-by-noah/sssssphm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylindrical-coordinates-by-noah/sssssphm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylindrical-coordinates-by-noah/sssssphm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylindrical-coordinates-by-noah/sssssphm"/>
      <lastmod>2026-11-01T23:36:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylindrical-coordinates-by-noah/sssssphm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylindrical-coordinates-by-noah/sssssphm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylindrical-coordinates-by-noah/sssssphm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylindrical-coordinates-by-noah/sssssphm"/>
      <lastmod>2026-11-01T23:36:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/concentric-dodecahedron-and-sphere/sssssphj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/concentric-dodecahedron-and-sphere/sssssphj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/concentric-dodecahedron-and-sphere/sssssphj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/concentric-dodecahedron-and-sphere/sssssphj"/>
      <lastmod>2026-11-01T22:04:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/concentric-dodecahedron-and-sphere/sssssphj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/concentric-dodecahedron-and-sphere/sssssphj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/concentric-dodecahedron-and-sphere/sssssphj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/concentric-dodecahedron-and-sphere/sssssphj"/>
      <lastmod>2026-11-01T22:04:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/number-line-tool-by-patrick-chung/sssssphp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-line-tool-by-patrick-chung/sssssphp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-line-tool-by-patrick-chung/sssssphp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-line-tool-by-patrick-chung/sssssphp"/>
      <lastmod>2026-11-01T19:19:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/number-line-tool-by-patrick-chung/sssssphp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-line-tool-by-patrick-chung/sssssphp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-line-tool-by-patrick-chung/sssssphp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-line-tool-by-patrick-chung/sssssphp"/>
      <lastmod>2026-11-01T19:19:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/scale-factor-and-volume-of-rectangular-prism/sssssphw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scale-factor-and-volume-of-rectangular-prism/sssssphw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scale-factor-and-volume-of-rectangular-prism/sssssphw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scale-factor-and-volume-of-rectangular-prism/sssssphw"/>
      <lastmod>2026-11-02T18:22:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/scale-factor-and-volume-of-rectangular-prism/sssssphw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scale-factor-and-volume-of-rectangular-prism/sssssphw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scale-factor-and-volume-of-rectangular-prism/sssssphw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scale-factor-and-volume-of-rectangular-prism/sssssphw"/>
      <lastmod>2026-11-02T18:22:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-linear-equations-in-standard-form-integer-intercepts/sssssph6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-in-standard-form-integer-intercepts/sssssph6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-equations-in-standard-form-integer-intercepts/sssssph6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-in-standard-form-integer-intercepts/sssssph6"/>
      <lastmod>2026-11-01T21:19:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-linear-equations-in-standard-form-integer-intercepts/sssssph6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-in-standard-form-integer-intercepts/sssssph6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-equations-in-standard-form-integer-intercepts/sssssph6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-equations-in-standard-form-integer-intercepts/sssssph6"/>
      <lastmod>2026-11-01T21:19:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-and-polygon-angle-sum-demo/sssssphg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-and-polygon-angle-sum-demo/sssssphg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-and-polygon-angle-sum-demo/sssssphg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-and-polygon-angle-sum-demo/sssssphg"/>
      <lastmod>2026-11-02T03:01:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-and-polygon-angle-sum-demo/sssssphg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-and-polygon-angle-sum-demo/sssssphg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-and-polygon-angle-sum-demo/sssssphg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-and-polygon-angle-sum-demo/sssssphg"/>
      <lastmod>2026-11-02T03:01:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-net-animation-by-y-lmaz-mutlu/sssssph9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-net-animation-by-y-lmaz-mutlu/sssssph9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-net-animation-by-y-lmaz-mutlu/sssssph9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-net-animation-by-y-lmaz-mutlu/sssssph9"/>
      <lastmod>2026-11-02T00:09:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-net-animation-by-y-lmaz-mutlu/sssssph9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-net-animation-by-y-lmaz-mutlu/sssssph9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-net-animation-by-y-lmaz-mutlu/sssssph9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-net-animation-by-y-lmaz-mutlu/sssssph9"/>
      <lastmod>2026-11-02T00:09:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-arithmetic-sum/sssssphe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-arithmetic-sum/sssssphe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-arithmetic-sum/sssssphe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-arithmetic-sum/sssssphe"/>
      <lastmod>2026-11-01T22:10:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-arithmetic-sum/sssssphe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-arithmetic-sum/sssssphe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-arithmetic-sum/sssssphe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-arithmetic-sum/sssssphe"/>
      <lastmod>2026-11-01T22:10:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-geogebra-user-interface-by-geogebra-team/sssssphv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-geogebra-user-interface-by-geogebra-team/sssssphv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-geogebra-user-interface-by-geogebra-team/sssssphv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-geogebra-user-interface-by-geogebra-team/sssssphv"/>
      <lastmod>2026-11-01T21:52:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-geogebra-user-interface-by-geogebra-team/sssssphv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-geogebra-user-interface-by-geogebra-team/sssssphv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-geogebra-user-interface-by-geogebra-team/sssssphv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-geogebra-user-interface-by-geogebra-team/sssssphv"/>
      <lastmod>2026-11-01T21:52:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/max-bill-geometric-construction-rotation-and-polygon-nesting/sssssph4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/max-bill-geometric-construction-rotation-and-polygon-nesting/sssssph4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/max-bill-geometric-construction-rotation-and-polygon-nesting/sssssph4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/max-bill-geometric-construction-rotation-and-polygon-nesting/sssssph4"/>
      <lastmod>2026-11-02T17:45:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/max-bill-geometric-construction-rotation-and-polygon-nesting/sssssph4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/max-bill-geometric-construction-rotation-and-polygon-nesting/sssssph4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/max-bill-geometric-construction-rotation-and-polygon-nesting/sssssph4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/max-bill-geometric-construction-rotation-and-polygon-nesting/sssssph4"/>
      <lastmod>2026-11-02T17:45:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quartic-derivative-trace/sssssphl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quartic-derivative-trace/sssssphl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quartic-derivative-trace/sssssphl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quartic-derivative-trace/sssssphl"/>
      <lastmod>2026-11-02T06:35:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quartic-derivative-trace/sssssphl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quartic-derivative-trace/sssssphl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quartic-derivative-trace/sssssphl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quartic-derivative-trace/sssssphl"/>
      <lastmod>2026-11-02T06:35:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sector-area-formula/sssssphy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sector-area-formula/sssssphy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sector-area-formula/sssssphy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sector-area-formula/sssssphy"/>
      <lastmod>2026-11-02T13:56:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sector-area-formula/sssssphy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sector-area-formula/sssssphy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sector-area-formula/sssssphy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sector-area-formula/sssssphy"/>
      <lastmod>2026-11-02T13:56:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/maximal-directional-derivative-visualization/ssssspha</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximal-directional-derivative-visualization/ssssspha"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximal-directional-derivative-visualization/ssssspha"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximal-directional-derivative-visualization/ssssspha"/>
      <lastmod>2026-11-02T00:14:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/maximal-directional-derivative-visualization/ssssspha</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximal-directional-derivative-visualization/ssssspha"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximal-directional-derivative-visualization/ssssspha"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximal-directional-derivative-visualization/ssssspha"/>
      <lastmod>2026-11-02T00:14:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/compound-interest-calculation-by-cemccourseware/sssssphc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compound-interest-calculation-by-cemccourseware/sssssphc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compound-interest-calculation-by-cemccourseware/sssssphc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compound-interest-calculation-by-cemccourseware/sssssphc"/>
      <lastmod>2026-11-02T10:39:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/compound-interest-calculation-by-cemccourseware/sssssphc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compound-interest-calculation-by-cemccourseware/sssssphc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compound-interest-calculation-by-cemccourseware/sssssphc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compound-interest-calculation-by-cemccourseware/sssssphc"/>
      <lastmod>2026-11-02T10:39:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pipe-helical-surface-rohrschraubfl-che-3d-demonstration/sssssphr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pipe-helical-surface-rohrschraubfl-che-3d-demonstration/sssssphr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pipe-helical-surface-rohrschraubfl-che-3d-demonstration/sssssphr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pipe-helical-surface-rohrschraubfl-che-3d-demonstration/sssssphr"/>
      <lastmod>2026-11-02T02:25:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pipe-helical-surface-rohrschraubfl-che-3d-demonstration/sssssphr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pipe-helical-surface-rohrschraubfl-che-3d-demonstration/sssssphr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pipe-helical-surface-rohrschraubfl-che-3d-demonstration/sssssphr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pipe-helical-surface-rohrschraubfl-che-3d-demonstration/sssssphr"/>
      <lastmod>2026-11-02T02:25:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/compound-interest-and-exponential-functions/sssssphh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compound-interest-and-exponential-functions/sssssphh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compound-interest-and-exponential-functions/sssssphh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compound-interest-and-exponential-functions/sssssphh"/>
      <lastmod>2026-11-01T23:44:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/compound-interest-and-exponential-functions/sssssphh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compound-interest-and-exponential-functions/sssssphh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compound-interest-and-exponential-functions/sssssphh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compound-interest-and-exponential-functions/sssssphh"/>
      <lastmod>2026-11-01T23:44:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-game/ssssspht</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-game/ssssspht"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-game/ssssspht"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-game/ssssspht"/>
      <lastmod>2026-11-01T21:13:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-game/ssssspht</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-game/ssssspht"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-game/ssssspht"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-game/ssssspht"/>
      <lastmod>2026-11-01T21:13:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practice-construct-an-equilateral-triangle/sssssphx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-construct-an-equilateral-triangle/sssssphx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-construct-an-equilateral-triangle/sssssphx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-construct-an-equilateral-triangle/sssssphx"/>
      <lastmod>2026-11-01T21:16:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practice-construct-an-equilateral-triangle/sssssphx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-construct-an-equilateral-triangle/sssssphx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-construct-an-equilateral-triangle/sssssphx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-construct-an-equilateral-triangle/sssssphx"/>
      <lastmod>2026-11-01T21:16:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/axa-logo/sssssphi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/axa-logo/sssssphi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/axa-logo/sssssphi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/axa-logo/sssssphi"/>
      <lastmod>2026-11-01T19:32:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/axa-logo/sssssphi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/axa-logo/sssssphi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/axa-logo/sssssphi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/axa-logo/sssssphi"/>
      <lastmod>2026-11-01T19:32:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-transformation-exploring-geometric-properties-via-transformations/ssssspho</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-transformation-exploring-geometric-properties-via-transformations/ssssspho"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-transformation-exploring-geometric-properties-via-transformations/ssssspho"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-transformation-exploring-geometric-properties-via-transformations/ssssspho"/>
      <lastmod>2026-11-02T00:58:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-transformation-exploring-geometric-properties-via-transformations/ssssspho</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-transformation-exploring-geometric-properties-via-transformations/ssssspho"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-transformation-exploring-geometric-properties-via-transformations/ssssspho"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-transformation-exploring-geometric-properties-via-transformations/ssssspho"/>
      <lastmod>2026-11-02T00:58:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modeling-with-exponential-functions-v2/ssssspts</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modeling-with-exponential-functions-v2/ssssspts"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modeling-with-exponential-functions-v2/ssssspts"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modeling-with-exponential-functions-v2/ssssspts"/>
      <lastmod>2026-11-02T16:44:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modeling-with-exponential-functions-v2/ssssspts</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modeling-with-exponential-functions-v2/ssssspts"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modeling-with-exponential-functions-v2/ssssspts"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modeling-with-exponential-functions-v2/ssssspts"/>
      <lastmod>2026-11-02T16:44:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/continued-radicals-and-fractions-visualizing-iterative-convergence/ssssspt7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/continued-radicals-and-fractions-visualizing-iterative-convergence/ssssspt7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/continued-radicals-and-fractions-visualizing-iterative-convergence/ssssspt7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/continued-radicals-and-fractions-visualizing-iterative-convergence/ssssspt7"/>
      <lastmod>2026-11-02T18:18:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/continued-radicals-and-fractions-visualizing-iterative-convergence/ssssspt7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/continued-radicals-and-fractions-visualizing-iterative-convergence/ssssspt7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/continued-radicals-and-fractions-visualizing-iterative-convergence/ssssspt7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/continued-radicals-and-fractions-visualizing-iterative-convergence/ssssspt7"/>
      <lastmod>2026-11-02T18:18:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/incircle-extension-gogeometry-action/sssssptn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/incircle-extension-gogeometry-action/sssssptn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/incircle-extension-gogeometry-action/sssssptn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/incircle-extension-gogeometry-action/sssssptn"/>
      <lastmod>2026-11-02T16:38:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/incircle-extension-gogeometry-action/sssssptn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/incircle-extension-gogeometry-action/sssssptn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/incircle-extension-gogeometry-action/sssssptn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/incircle-extension-gogeometry-action/sssssptn"/>
      <lastmod>2026-11-02T16:38:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/median-line-construction/ssssspt2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/median-line-construction/ssssspt2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/median-line-construction/ssssspt2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/median-line-construction/ssssspt2"/>
      <lastmod>2026-11-01T20:49:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/median-line-construction/ssssspt2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/median-line-construction/ssssspt2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/median-line-construction/ssssspt2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/median-line-construction/ssssspt2"/>
      <lastmod>2026-11-01T20:49:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallellogram-demo/sssssptk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallellogram-demo/sssssptk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallellogram-demo/sssssptk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallellogram-demo/sssssptk"/>
      <lastmod>2026-11-02T09:05:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallellogram-demo/sssssptk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallellogram-demo/sssssptk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallellogram-demo/sssssptk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallellogram-demo/sssssptk"/>
      <lastmod>2026-11-02T09:05:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-numbers-and-set-of-points/sssssptz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-numbers-and-set-of-points/sssssptz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-numbers-and-set-of-points/sssssptz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-numbers-and-set-of-points/sssssptz"/>
      <lastmod>2026-11-01T21:30:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-numbers-and-set-of-points/sssssptz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-numbers-and-set-of-points/sssssptz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-numbers-and-set-of-points/sssssptz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-numbers-and-set-of-points/sssssptz"/>
      <lastmod>2026-11-01T21:30:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-volume-calculation-by-laxman-singh/ssssspt0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-by-laxman-singh/ssssspt0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-volume-calculation-by-laxman-singh/ssssspt0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-by-laxman-singh/ssssspt0"/>
      <lastmod>2026-11-02T17:11:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-volume-calculation-by-laxman-singh/ssssspt0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-by-laxman-singh/ssssspt0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-volume-calculation-by-laxman-singh/ssssspt0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-by-laxman-singh/ssssspt0"/>
      <lastmod>2026-11-02T17:11:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plotting-points-practice/sssssptd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-points-practice/sssssptd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-points-practice/sssssptd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-points-practice/sssssptd"/>
      <lastmod>2026-11-02T16:31:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plotting-points-practice/sssssptd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-points-practice/sssssptd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-points-practice/sssssptd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-points-practice/sssssptd"/>
      <lastmod>2026-11-02T16:31:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trip-planning-task/sssssptf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trip-planning-task/sssssptf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trip-planning-task/sssssptf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trip-planning-task/sssssptf"/>
      <lastmod>2026-11-02T17:08:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trip-planning-task/sssssptf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trip-planning-task/sssssptf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trip-planning-task/sssssptf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trip-planning-task/sssssptf"/>
      <lastmod>2026-11-02T17:08:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractions-and-geometry-demonstration/ssssspt8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-and-geometry-demonstration/ssssspt8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-and-geometry-demonstration/ssssspt8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-and-geometry-demonstration/ssssspt8"/>
      <lastmod>2026-11-02T18:43:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractions-and-geometry-demonstration/ssssspt8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-and-geometry-demonstration/ssssspt8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-and-geometry-demonstration/ssssspt8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-and-geometry-demonstration/ssssspt8"/>
      <lastmod>2026-11-02T18:43:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-addition-quiz-generator-by-tim-brzezinski/sssssptu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-addition-quiz-generator-by-tim-brzezinski/sssssptu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-addition-quiz-generator-by-tim-brzezinski/sssssptu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-addition-quiz-generator-by-tim-brzezinski/sssssptu"/>
      <lastmod>2026-11-02T16:54:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-addition-quiz-generator-by-tim-brzezinski/sssssptu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-addition-quiz-generator-by-tim-brzezinski/sssssptu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-addition-quiz-generator-by-tim-brzezinski/sssssptu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-addition-quiz-generator-by-tim-brzezinski/sssssptu"/>
      <lastmod>2026-11-02T16:54:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-ratios-by-ella-sayin/ssssspt5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-by-ella-sayin/ssssspt5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-by-ella-sayin/ssssspt5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-by-ella-sayin/ssssspt5"/>
      <lastmod>2026-11-02T18:09:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-ratios-by-ella-sayin/ssssspt5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-by-ella-sayin/ssssspt5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-by-ella-sayin/ssssspt5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-by-ella-sayin/ssssspt5"/>
      <lastmod>2026-11-02T18:09:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/find-the-right-shape/sssssptb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-the-right-shape/sssssptb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-the-right-shape/sssssptb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-the-right-shape/sssssptb"/>
      <lastmod>2026-11-02T17:41:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/find-the-right-shape/sssssptb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-the-right-shape/sssssptb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-the-right-shape/sssssptb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-the-right-shape/sssssptb"/>
      <lastmod>2026-11-02T17:41:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-presentation/ssssspt3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-presentation/ssssspt3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-presentation/ssssspt3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-presentation/ssssspt3"/>
      <lastmod>2026-11-02T18:02:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-presentation/ssssspt3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-presentation/ssssspt3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-presentation/ssssspt3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-presentation/ssssspt3"/>
      <lastmod>2026-11-02T18:02:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dividing-fractions-interactive-demo-random-generation-and-visual-verification/sssssptq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dividing-fractions-interactive-demo-random-generation-and-visual-verification/sssssptq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dividing-fractions-interactive-demo-random-generation-and-visual-verification/sssssptq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dividing-fractions-interactive-demo-random-generation-and-visual-verification/sssssptq"/>
      <lastmod>2026-11-02T18:11:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dividing-fractions-interactive-demo-random-generation-and-visual-verification/sssssptq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dividing-fractions-interactive-demo-random-generation-and-visual-verification/sssssptq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dividing-fractions-interactive-demo-random-generation-and-visual-verification/sssssptq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dividing-fractions-interactive-demo-random-generation-and-visual-verification/sssssptq"/>
      <lastmod>2026-11-02T18:11:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-programming-exploration/ssssspt1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-programming-exploration/ssssspt1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-programming-exploration/ssssspt1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-programming-exploration/ssssspt1"/>
      <lastmod>2026-11-02T00:51:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-programming-exploration/ssssspt1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-programming-exploration/ssssspt1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-programming-exploration/ssssspt1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-programming-exploration/ssssspt1"/>
      <lastmod>2026-11-02T00:51:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/asa-exploration-creating-triangles-via-angle-side-angle/sssssptm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/asa-exploration-creating-triangles-via-angle-side-angle/sssssptm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/asa-exploration-creating-triangles-via-angle-side-angle/sssssptm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/asa-exploration-creating-triangles-via-angle-side-angle/sssssptm"/>
      <lastmod>2026-11-02T00:31:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/asa-exploration-creating-triangles-via-angle-side-angle/sssssptm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/asa-exploration-creating-triangles-via-angle-side-angle/sssssptm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/asa-exploration-creating-triangles-via-angle-side-angle/sssssptm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/asa-exploration-creating-triangles-via-angle-side-angle/sssssptm"/>
      <lastmod>2026-11-02T00:31:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fit-four-pieces-into-a-square/sssssptj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fit-four-pieces-into-a-square/sssssptj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fit-four-pieces-into-a-square/sssssptj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fit-four-pieces-into-a-square/sssssptj"/>
      <lastmod>2026-11-01T21:25:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fit-four-pieces-into-a-square/sssssptj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fit-four-pieces-into-a-square/sssssptj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fit-four-pieces-into-a-square/sssssptj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fit-four-pieces-into-a-square/sssssptj"/>
      <lastmod>2026-11-01T21:25:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/basic-construction-copy-a-line-segment/sssssptp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-construction-copy-a-line-segment/sssssptp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-construction-copy-a-line-segment/sssssptp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-construction-copy-a-line-segment/sssssptp"/>
      <lastmod>2026-11-02T12:32:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/basic-construction-copy-a-line-segment/sssssptp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-construction-copy-a-line-segment/sssssptp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-construction-copy-a-line-segment/sssssptp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-construction-copy-a-line-segment/sssssptp"/>
      <lastmod>2026-11-02T12:32:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-transformations-and-properties-of-similar-triangles/sssssptw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-properties-of-similar-triangles/sssssptw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-and-properties-of-similar-triangles/sssssptw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-properties-of-similar-triangles/sssssptw"/>
      <lastmod>2026-11-02T00:43:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-transformations-and-properties-of-similar-triangles/sssssptw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-properties-of-similar-triangles/sssssptw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-and-properties-of-similar-triangles/sssssptw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-properties-of-similar-triangles/sssssptw"/>
      <lastmod>2026-11-02T00:43:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-rotation-1/ssssspt6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-rotation-1/ssssspt6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-rotation-1/ssssspt6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-rotation-1/ssssspt6"/>
      <lastmod>2026-11-02T17:01:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-rotation-1/ssssspt6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-rotation-1/ssssspt6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-rotation-1/ssssspt6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-rotation-1/ssssspt6"/>
      <lastmod>2026-11-02T17:01:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/poisson-distribution-probability-calculation/sssssptg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/poisson-distribution-probability-calculation/sssssptg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/poisson-distribution-probability-calculation/sssssptg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/poisson-distribution-probability-calculation/sssssptg"/>
      <lastmod>2026-11-01T22:06:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/poisson-distribution-probability-calculation/sssssptg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/poisson-distribution-probability-calculation/sssssptg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/poisson-distribution-probability-calculation/sssssptg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/poisson-distribution-probability-calculation/sssssptg"/>
      <lastmod>2026-11-01T22:06:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/calculator-for-money-percentages/ssssspt9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculator-for-money-percentages/ssssspt9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculator-for-money-percentages/ssssspt9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculator-for-money-percentages/ssssspt9"/>
      <lastmod>2026-11-01T21:04:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/calculator-for-money-percentages/ssssspt9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculator-for-money-percentages/ssssspt9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculator-for-money-percentages/ssssspt9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculator-for-money-percentages/ssssspt9"/>
      <lastmod>2026-11-01T21:04:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-a-triangle-by-tbignell/ssssspte</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-triangle-by-tbignell/ssssspte"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-triangle-by-tbignell/ssssspte"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-triangle-by-tbignell/ssssspte"/>
      <lastmod>2026-11-01T23:29:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-a-triangle-by-tbignell/ssssspte</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-triangle-by-tbignell/ssssspte"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-triangle-by-tbignell/ssssspte"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-triangle-by-tbignell/ssssspte"/>
      <lastmod>2026-11-01T23:29:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graph-translation-demonstration/sssssptv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-translation-demonstration/sssssptv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-translation-demonstration/sssssptv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-translation-demonstration/sssssptv"/>
      <lastmod>2026-11-01T23:46:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graph-translation-demonstration/sssssptv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-translation-demonstration/sssssptv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-translation-demonstration/sssssptv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-translation-demonstration/sssssptv"/>
      <lastmod>2026-11-01T23:46:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/double-digit-subtraction/ssssspt4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-digit-subtraction/ssssspt4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-digit-subtraction/ssssspt4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-digit-subtraction/ssssspt4"/>
      <lastmod>2026-11-02T17:04:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/double-digit-subtraction/ssssspt4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-digit-subtraction/ssssspt4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-digit-subtraction/ssssspt4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-digit-subtraction/ssssspt4"/>
      <lastmod>2026-11-02T17:04:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylindrical-surface-and-function-plotting-geogebra-geometric-construction-examp/sssssptl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylindrical-surface-and-function-plotting-geogebra-geometric-construction-examp/sssssptl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylindrical-surface-and-function-plotting-geogebra-geometric-construction-examp/sssssptl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylindrical-surface-and-function-plotting-geogebra-geometric-construction-examp/sssssptl"/>
      <lastmod>2026-11-02T02:50:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylindrical-surface-and-function-plotting-geogebra-geometric-construction-examp/sssssptl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylindrical-surface-and-function-plotting-geogebra-geometric-construction-examp/sssssptl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylindrical-surface-and-function-plotting-geogebra-geometric-construction-examp/sssssptl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylindrical-surface-and-function-plotting-geogebra-geometric-construction-examp/sssssptl"/>
      <lastmod>2026-11-02T02:50:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-and-properties-of-x-2-x-function/ssssspty</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-and-properties-of-x-2-x-function/ssssspty"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-and-properties-of-x-2-x-function/ssssspty"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-and-properties-of-x-2-x-function/ssssspty"/>
      <lastmod>2026-11-02T18:08:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-and-properties-of-x-2-x-function/ssssspty</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-and-properties-of-x-2-x-function/ssssspty"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-and-properties-of-x-2-x-function/ssssspty"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-and-properties-of-x-2-x-function/ssssspty"/>
      <lastmod>2026-11-02T18:08:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-derivative-demo/ssssspta</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-derivative-demo/ssssspta"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-derivative-demo/ssssspta"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-derivative-demo/ssssspta"/>
      <lastmod>2026-11-02T09:33:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-derivative-demo/ssssspta</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-derivative-demo/ssssspta"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-derivative-demo/ssssspta"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-derivative-demo/ssssspta"/>
      <lastmod>2026-11-02T09:33:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/further-kinematics-circumcircle-and-vectors/sssssptc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/further-kinematics-circumcircle-and-vectors/sssssptc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/further-kinematics-circumcircle-and-vectors/sssssptc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/further-kinematics-circumcircle-and-vectors/sssssptc"/>
      <lastmod>2026-11-02T17:42:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/further-kinematics-circumcircle-and-vectors/sssssptc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/further-kinematics-circumcircle-and-vectors/sssssptc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/further-kinematics-circumcircle-and-vectors/sssssptc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/further-kinematics-circumcircle-and-vectors/sssssptc"/>
      <lastmod>2026-11-02T17:42:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-a-perpendicular-line-segment/sssssptr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-perpendicular-line-segment/sssssptr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-perpendicular-line-segment/sssssptr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-perpendicular-line-segment/sssssptr"/>
      <lastmod>2026-11-01T21:29:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-a-perpendicular-line-segment/sssssptr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-perpendicular-line-segment/sssssptr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-perpendicular-line-segment/sssssptr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-perpendicular-line-segment/sssssptr"/>
      <lastmod>2026-11-01T21:29:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/maximize-rectangle-in-parabola/ssssspth</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximize-rectangle-in-parabola/ssssspth"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximize-rectangle-in-parabola/ssssspth"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximize-rectangle-in-parabola/ssssspth"/>
      <lastmod>2026-11-02T15:41:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/maximize-rectangle-in-parabola/ssssspth</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximize-rectangle-in-parabola/ssssspth"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximize-rectangle-in-parabola/ssssspth"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximize-rectangle-in-parabola/ssssspth"/>
      <lastmod>2026-11-02T15:41:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shreddies-and-milk-1/sssssptt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shreddies-and-milk-1/sssssptt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shreddies-and-milk-1/sssssptt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shreddies-and-milk-1/sssssptt"/>
      <lastmod>2026-11-01T19:36:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shreddies-and-milk-1/sssssptt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shreddies-and-milk-1/sssssptt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shreddies-and-milk-1/sssssptt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shreddies-and-milk-1/sssssptt"/>
      <lastmod>2026-11-01T19:36:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/partial-fraction-integration-demo/sssssptx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-fraction-integration-demo/sssssptx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-fraction-integration-demo/sssssptx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-fraction-integration-demo/sssssptx"/>
      <lastmod>2026-11-01T21:38:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/partial-fraction-integration-demo/sssssptx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-fraction-integration-demo/sssssptx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-fraction-integration-demo/sssssptx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-fraction-integration-demo/sssssptx"/>
      <lastmod>2026-11-01T21:38:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rainbow-solution-curves-of-odes-with-slope-field/ssssspti</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rainbow-solution-curves-of-odes-with-slope-field/ssssspti"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rainbow-solution-curves-of-odes-with-slope-field/ssssspti"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rainbow-solution-curves-of-odes-with-slope-field/ssssspti"/>
      <lastmod>2026-11-02T17:35:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rainbow-solution-curves-of-odes-with-slope-field/ssssspti</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rainbow-solution-curves-of-odes-with-slope-field/ssssspti"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rainbow-solution-curves-of-odes-with-slope-field/ssssspti"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rainbow-solution-curves-of-odes-with-slope-field/ssssspti"/>
      <lastmod>2026-11-02T17:35:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/squares-and-triangles-geometry-puzzles/ssssspto</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squares-and-triangles-geometry-puzzles/ssssspto"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squares-and-triangles-geometry-puzzles/ssssspto"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squares-and-triangles-geometry-puzzles/ssssspto"/>
      <lastmod>2026-11-01T19:16:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/squares-and-triangles-geometry-puzzles/ssssspto</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squares-and-triangles-geometry-puzzles/ssssspto"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squares-and-triangles-geometry-puzzles/ssssspto"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squares-and-triangles-geometry-puzzles/ssssspto"/>
      <lastmod>2026-11-01T19:16:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integral-and-derivatives-lesson/ssssspxs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integral-and-derivatives-lesson/ssssspxs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integral-and-derivatives-lesson/ssssspxs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integral-and-derivatives-lesson/ssssspxs"/>
      <lastmod>2026-11-02T00:09:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integral-and-derivatives-lesson/ssssspxs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integral-and-derivatives-lesson/ssssspxs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integral-and-derivatives-lesson/ssssspxs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integral-and-derivatives-lesson/ssssspxs"/>
      <lastmod>2026-11-02T00:09:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/elliptical-trajectories-models/ssssspx7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/elliptical-trajectories-models/ssssspx7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/elliptical-trajectories-models/ssssspx7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/elliptical-trajectories-models/ssssspx7"/>
      <lastmod>2026-11-02T16:35:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/elliptical-trajectories-models/ssssspx7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/elliptical-trajectories-models/ssssspx7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/elliptical-trajectories-models/ssssspx7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/elliptical-trajectories-models/ssssspx7"/>
      <lastmod>2026-11-02T16:35:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilation-coordinate-grid-3/ssssspxn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-coordinate-grid-3/ssssspxn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-coordinate-grid-3/ssssspxn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-coordinate-grid-3/ssssspxn"/>
      <lastmod>2026-11-02T15:48:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilation-coordinate-grid-3/ssssspxn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-coordinate-grid-3/ssssspxn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-coordinate-grid-3/ssssspxn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-coordinate-grid-3/ssssspxn"/>
      <lastmod>2026-11-02T15:48:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/calculating-the-perimeter-of-a-square/ssssspx2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-the-perimeter-of-a-square/ssssspx2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-the-perimeter-of-a-square/ssssspx2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-the-perimeter-of-a-square/ssssspx2"/>
      <lastmod>2026-11-02T16:55:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/calculating-the-perimeter-of-a-square/ssssspx2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-the-perimeter-of-a-square/ssssspx2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-the-perimeter-of-a-square/ssssspx2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-the-perimeter-of-a-square/ssssspx2"/>
      <lastmod>2026-11-02T16:55:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-functions-transformations/ssssspxk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-functions-transformations/ssssspxk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-functions-transformations/ssssspxk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-functions-transformations/ssssspxk"/>
      <lastmod>2026-11-01T23:11:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-functions-transformations/ssssspxk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-functions-transformations/ssssspxk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-functions-transformations/ssssspxk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-functions-transformations/ssssspxk"/>
      <lastmod>2026-11-01T23:11:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trivial-example-with-three-points/ssssspxz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trivial-example-with-three-points/ssssspxz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trivial-example-with-three-points/ssssspxz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trivial-example-with-three-points/ssssspxz"/>
      <lastmod>2026-11-01T23:25:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trivial-example-with-three-points/ssssspxz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trivial-example-with-three-points/ssssspxz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trivial-example-with-three-points/ssssspxz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trivial-example-with-three-points/ssssspxz"/>
      <lastmod>2026-11-01T23:25:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-abe-silhouette-surface-of-rev-cross-section/ssssspx0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-abe-silhouette-surface-of-rev-cross-section/ssssspx0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-abe-silhouette-surface-of-rev-cross-section/ssssspx0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-abe-silhouette-surface-of-rev-cross-section/ssssspx0"/>
      <lastmod>2026-11-02T02:33:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-abe-silhouette-surface-of-rev-cross-section/ssssspx0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-abe-silhouette-surface-of-rev-cross-section/ssssspx0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-abe-silhouette-surface-of-rev-cross-section/ssssspx0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-abe-silhouette-surface-of-rev-cross-section/ssssspx0"/>
      <lastmod>2026-11-02T02:33:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/radians-in-unit-circle-by-rose-neal/ssssspxd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/radians-in-unit-circle-by-rose-neal/ssssspxd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/radians-in-unit-circle-by-rose-neal/ssssspxd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/radians-in-unit-circle-by-rose-neal/ssssspxd"/>
      <lastmod>2026-11-02T17:59:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/radians-in-unit-circle-by-rose-neal/ssssspxd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/radians-in-unit-circle-by-rose-neal/ssssspxd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/radians-in-unit-circle-by-rose-neal/ssssspxd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/radians-in-unit-circle-by-rose-neal/ssssspxd"/>
      <lastmod>2026-11-02T17:59:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstrating-sphere-volume-formula/ssssspxf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-sphere-volume-formula/ssssspxf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-sphere-volume-formula/ssssspxf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-sphere-volume-formula/ssssspxf"/>
      <lastmod>2026-11-01T19:08:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstrating-sphere-volume-formula/ssssspxf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-sphere-volume-formula/ssssspxf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-sphere-volume-formula/ssssspxf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-sphere-volume-formula/ssssspxf"/>
      <lastmod>2026-11-01T19:08:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modifiable-solid-isosceles-right-triangle-cross-sections-parallel-to-yaxis/ssssspx8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modifiable-solid-isosceles-right-triangle-cross-sections-parallel-to-yaxis/ssssspx8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modifiable-solid-isosceles-right-triangle-cross-sections-parallel-to-yaxis/ssssspx8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modifiable-solid-isosceles-right-triangle-cross-sections-parallel-to-yaxis/ssssspx8"/>
      <lastmod>2026-11-02T02:33:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modifiable-solid-isosceles-right-triangle-cross-sections-parallel-to-yaxis/ssssspx8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modifiable-solid-isosceles-right-triangle-cross-sections-parallel-to-yaxis/ssssspx8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modifiable-solid-isosceles-right-triangle-cross-sections-parallel-to-yaxis/ssssspx8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modifiable-solid-isosceles-right-triangle-cross-sections-parallel-to-yaxis/ssssspx8"/>
      <lastmod>2026-11-02T02:33:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/string-art-symmetry-translations/ssssspxu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/string-art-symmetry-translations/ssssspxu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/string-art-symmetry-translations/ssssspxu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/string-art-symmetry-translations/ssssspxu"/>
      <lastmod>2026-11-02T16:38:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/string-art-symmetry-translations/ssssspxu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/string-art-symmetry-translations/ssssspxu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/string-art-symmetry-translations/ssssspxu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/string-art-symmetry-translations/ssssspxu"/>
      <lastmod>2026-11-02T16:38:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-of-a-right-triangle-by-robert-byng/ssssspx5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-right-triangle-by-robert-byng/ssssspx5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-right-triangle-by-robert-byng/ssssspx5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-right-triangle-by-robert-byng/ssssspx5"/>
      <lastmod>2026-11-02T16:57:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-of-a-right-triangle-by-robert-byng/ssssspx5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-right-triangle-by-robert-byng/ssssspx5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-right-triangle-by-robert-byng/ssssspx5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-right-triangle-by-robert-byng/ssssspx5"/>
      <lastmod>2026-11-02T16:57:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sss-triangle-congruence-theorem-dynamic-proof/ssssspxb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-triangle-congruence-theorem-dynamic-proof/ssssspxb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-triangle-congruence-theorem-dynamic-proof/ssssspxb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-triangle-congruence-theorem-dynamic-proof/ssssspxb"/>
      <lastmod>2026-11-02T08:43:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sss-triangle-congruence-theorem-dynamic-proof/ssssspxb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-triangle-congruence-theorem-dynamic-proof/ssssspxb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-triangle-congruence-theorem-dynamic-proof/ssssspxb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-triangle-congruence-theorem-dynamic-proof/ssssspxb"/>
      <lastmod>2026-11-02T08:43:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/characteristics-of-rectangles-and-squares/ssssspx3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/characteristics-of-rectangles-and-squares/ssssspx3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/characteristics-of-rectangles-and-squares/ssssspx3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/characteristics-of-rectangles-and-squares/ssssspx3"/>
      <lastmod>2026-11-02T17:15:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/characteristics-of-rectangles-and-squares/ssssspx3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/characteristics-of-rectangles-and-squares/ssssspx3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/characteristics-of-rectangles-and-squares/ssssspx3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/characteristics-of-rectangles-and-squares/ssssspx3"/>
      <lastmod>2026-11-02T17:15:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/copy-of-a-segment-in-plane-figures-and-probability/ssssspxq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copy-of-a-segment-in-plane-figures-and-probability/ssssspxq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copy-of-a-segment-in-plane-figures-and-probability/ssssspxq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copy-of-a-segment-in-plane-figures-and-probability/ssssspxq"/>
      <lastmod>2026-11-02T00:48:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/copy-of-a-segment-in-plane-figures-and-probability/ssssspxq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copy-of-a-segment-in-plane-figures-and-probability/ssssspxq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copy-of-a-segment-in-plane-figures-and-probability/ssssspxq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copy-of-a-segment-in-plane-figures-and-probability/ssssspxq"/>
      <lastmod>2026-11-02T00:48:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphical-solution-of-systems-of-linear-equations/ssssspx1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-solution-of-systems-of-linear-equations/ssssspx1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-solution-of-systems-of-linear-equations/ssssspx1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-solution-of-systems-of-linear-equations/ssssspx1"/>
      <lastmod>2026-11-01T21:58:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphical-solution-of-systems-of-linear-equations/ssssspx1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-solution-of-systems-of-linear-equations/ssssspx1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-solution-of-systems-of-linear-equations/ssssspx1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-solution-of-systems-of-linear-equations/ssssspx1"/>
      <lastmod>2026-11-01T21:58:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-the-quadratic-function/ssssspxm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-quadratic-function/ssssspxm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-quadratic-function/ssssspxm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-quadratic-function/ssssspxm"/>
      <lastmod>2026-11-02T18:34:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-the-quadratic-function/ssssspxm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-the-quadratic-function/ssssspxm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-the-quadratic-function/ssssspxm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-the-quadratic-function/ssssspxm"/>
      <lastmod>2026-11-02T18:34:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-orthocenter-and-incircle/ssssspxj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-orthocenter-and-incircle/ssssspxj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-orthocenter-and-incircle/ssssspxj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-orthocenter-and-incircle/ssssspxj"/>
      <lastmod>2026-11-01T21:16:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-orthocenter-and-incircle/ssssspxj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-orthocenter-and-incircle/ssssspxj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-orthocenter-and-incircle/ssssspxj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-orthocenter-and-incircle/ssssspxj"/>
      <lastmod>2026-11-01T21:16:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sas-triangle-congruence-exercise/ssssspxp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sas-triangle-congruence-exercise/ssssspxp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sas-triangle-congruence-exercise/ssssspxp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sas-triangle-congruence-exercise/ssssspxp"/>
      <lastmod>2026-11-02T15:52:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sas-triangle-congruence-exercise/ssssspxp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sas-triangle-congruence-exercise/ssssspxp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sas-triangle-congruence-exercise/ssssspxp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sas-triangle-congruence-exercise/ssssspxp"/>
      <lastmod>2026-11-02T15:52:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-example-tangent-function-and-vectors/ssssspxw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-example-tangent-function-and-vectors/ssssspxw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-example-tangent-function-and-vectors/ssssspxw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-example-tangent-function-and-vectors/ssssspxw"/>
      <lastmod>2026-11-02T16:58:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-example-tangent-function-and-vectors/ssssspxw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-example-tangent-function-and-vectors/ssssspxw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-example-tangent-function-and-vectors/ssssspxw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-example-tangent-function-and-vectors/ssssspxw"/>
      <lastmod>2026-11-02T16:58:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-review-1-rotation-scaling-and-distance-measurement/ssssspx6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-review-1-rotation-scaling-and-distance-measurement/ssssspx6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-review-1-rotation-scaling-and-distance-measurement/ssssspx6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-review-1-rotation-scaling-and-distance-measurement/ssssspx6"/>
      <lastmod>2026-11-02T17:49:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-review-1-rotation-scaling-and-distance-measurement/ssssspx6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-review-1-rotation-scaling-and-distance-measurement/ssssspx6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-review-1-rotation-scaling-and-distance-measurement/ssssspx6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-review-1-rotation-scaling-and-distance-measurement/ssssspx6"/>
      <lastmod>2026-11-02T17:49:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/representing-fractions-on-number-line-2/ssssspxg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/representing-fractions-on-number-line-2/ssssspxg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/representing-fractions-on-number-line-2/ssssspxg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/representing-fractions-on-number-line-2/ssssspxg"/>
      <lastmod>2026-11-02T13:49:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/representing-fractions-on-number-line-2/ssssspxg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/representing-fractions-on-number-line-2/ssssspxg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/representing-fractions-on-number-line-2/ssssspxg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/representing-fractions-on-number-line-2/ssssspxg"/>
      <lastmod>2026-11-02T13:49:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plane-crossing-plane-what-do-we-get/ssssspx9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plane-crossing-plane-what-do-we-get/ssssspx9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plane-crossing-plane-what-do-we-get/ssssspx9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plane-crossing-plane-what-do-we-get/ssssspx9"/>
      <lastmod>2026-11-01T21:11:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plane-crossing-plane-what-do-we-get/ssssspx9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plane-crossing-plane-what-do-we-get/ssssspx9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plane-crossing-plane-what-do-we-get/ssssspx9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plane-crossing-plane-what-do-we-get/ssssspx9"/>
      <lastmod>2026-11-01T21:11:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-multiplication-demo/ssssspxe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-multiplication-demo/ssssspxe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-multiplication-demo/ssssspxe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-multiplication-demo/ssssspxe"/>
      <lastmod>2026-11-02T02:36:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-multiplication-demo/ssssspxe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-multiplication-demo/ssssspxe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-multiplication-demo/ssssspxe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-multiplication-demo/ssssspxe"/>
      <lastmod>2026-11-02T02:36:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simple-harmonic-motion-shm/ssssspxv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-harmonic-motion-shm/ssssspxv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-harmonic-motion-shm/ssssspxv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-harmonic-motion-shm/ssssspxv"/>
      <lastmod>2026-11-01T19:19:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simple-harmonic-motion-shm/ssssspxv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-harmonic-motion-shm/ssssspxv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-harmonic-motion-shm/ssssspxv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-harmonic-motion-shm/ssssspxv"/>
      <lastmod>2026-11-01T19:19:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-fraction-comparison-example/ssssspx4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-fraction-comparison-example/ssssspx4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-fraction-comparison-example/ssssspx4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-fraction-comparison-example/ssssspx4"/>
      <lastmod>2026-11-02T17:03:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-fraction-comparison-example/ssssspx4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-fraction-comparison-example/ssssspx4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-fraction-comparison-example/ssssspx4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-fraction-comparison-example/ssssspx4"/>
      <lastmod>2026-11-02T17:03:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-geometric-illustration-by-tim-brzezinski/ssssspxl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometric-illustration-by-tim-brzezinski/ssssspxl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometric-illustration-by-tim-brzezinski/ssssspxl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometric-illustration-by-tim-brzezinski/ssssspxl"/>
      <lastmod>2026-11-02T16:41:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-geometric-illustration-by-tim-brzezinski/ssssspxl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometric-illustration-by-tim-brzezinski/ssssspxl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometric-illustration-by-tim-brzezinski/ssssspxl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometric-illustration-by-tim-brzezinski/ssssspxl"/>
      <lastmod>2026-11-02T16:41:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interior-angles-of-polygons-by-karis/ssssspxy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interior-angles-of-polygons-by-karis/ssssspxy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interior-angles-of-polygons-by-karis/ssssspxy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interior-angles-of-polygons-by-karis/ssssspxy"/>
      <lastmod>2026-11-02T18:35:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interior-angles-of-polygons-by-karis/ssssspxy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interior-angles-of-polygons-by-karis/ssssspxy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interior-angles-of-polygons-by-karis/ssssspxy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interior-angles-of-polygons-by-karis/ssssspxy"/>
      <lastmod>2026-11-02T18:35:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coupled-differential-equations-demo/ssssspxa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coupled-differential-equations-demo/ssssspxa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coupled-differential-equations-demo/ssssspxa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coupled-differential-equations-demo/ssssspxa"/>
      <lastmod>2026-11-01T23:41:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coupled-differential-equations-demo/ssssspxa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coupled-differential-equations-demo/ssssspxa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coupled-differential-equations-demo/ssssspxa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coupled-differential-equations-demo/ssssspxa"/>
      <lastmod>2026-11-01T23:41:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-rhombus-incircle-illustration/ssssspxc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-rhombus-incircle-illustration/ssssspxc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-rhombus-incircle-illustration/ssssspxc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-rhombus-incircle-illustration/ssssspxc"/>
      <lastmod>2026-11-02T17:15:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-rhombus-incircle-illustration/ssssspxc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-rhombus-incircle-illustration/ssssspxc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-rhombus-incircle-illustration/ssssspxc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-rhombus-incircle-illustration/ssssspxc"/>
      <lastmod>2026-11-02T17:15:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/france-covid-19-cases-trend/ssssspxr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/france-covid-19-cases-trend/ssssspxr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/france-covid-19-cases-trend/ssssspxr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/france-covid-19-cases-trend/ssssspxr"/>
      <lastmod>2026-11-01T20:45:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/france-covid-19-cases-trend/ssssspxr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/france-covid-19-cases-trend/ssssspxr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/france-covid-19-cases-trend/ssssspxr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/france-covid-19-cases-trend/ssssspxr"/>
      <lastmod>2026-11-01T20:45:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-quadratic-equations-in-vertex-form/ssssspxh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-equations-in-vertex-form/ssssspxh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-equations-in-vertex-form/ssssspxh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-equations-in-vertex-form/ssssspxh"/>
      <lastmod>2026-11-02T18:42:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-quadratic-equations-in-vertex-form/ssssspxh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-equations-in-vertex-form/ssssspxh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-equations-in-vertex-form/ssssspxh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-equations-in-vertex-form/ssssspxh"/>
      <lastmod>2026-11-02T18:42:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-varying-with-coefficients/ssssspxt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-varying-with-coefficients/ssssspxt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-varying-with-coefficients/ssssspxt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-varying-with-coefficients/ssssspxt"/>
      <lastmod>2026-11-01T19:31:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-varying-with-coefficients/ssssspxt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-varying-with-coefficients/ssssspxt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-varying-with-coefficients/ssssspxt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-varying-with-coefficients/ssssspxt"/>
      <lastmod>2026-11-01T19:31:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equation-of-line-in-parametric-form/ssssspxx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equation-of-line-in-parametric-form/ssssspxx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equation-of-line-in-parametric-form/ssssspxx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equation-of-line-in-parametric-form/ssssspxx"/>
      <lastmod>2026-11-01T23:39:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equation-of-line-in-parametric-form/ssssspxx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equation-of-line-in-parametric-form/ssssspxx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equation-of-line-in-parametric-form/ssssspxx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equation-of-line-in-parametric-form/ssssspxx"/>
      <lastmod>2026-11-01T23:39:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-paper-folding/ssssspxi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-paper-folding/ssssspxi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-paper-folding/ssssspxi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-paper-folding/ssssspxi"/>
      <lastmod>2026-11-02T16:42:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-paper-folding/ssssspxi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-paper-folding/ssssspxi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-paper-folding/ssssspxi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-paper-folding/ssssspxi"/>
      <lastmod>2026-11-02T16:42:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ryan-s-orthocenter-construction/ssssspxo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ryan-s-orthocenter-construction/ssssspxo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ryan-s-orthocenter-construction/ssssspxo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ryan-s-orthocenter-construction/ssssspxo"/>
      <lastmod>2026-11-02T16:47:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ryan-s-orthocenter-construction/ssssspxo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ryan-s-orthocenter-construction/ssssspxo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ryan-s-orthocenter-construction/ssssspxo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ryan-s-orthocenter-construction/ssssspxo"/>
      <lastmod>2026-11-02T16:47:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphical-solution-of-quadratic-linear-equations/ssssspis</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-solution-of-quadratic-linear-equations/ssssspis"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-solution-of-quadratic-linear-equations/ssssspis"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-solution-of-quadratic-linear-equations/ssssspis"/>
      <lastmod>2026-11-02T03:00:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphical-solution-of-quadratic-linear-equations/ssssspis</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-solution-of-quadratic-linear-equations/ssssspis"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-solution-of-quadratic-linear-equations/ssssspis"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-solution-of-quadratic-linear-equations/ssssspis"/>
      <lastmod>2026-11-02T03:00:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-congruence-demonstration/ssssspi7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-congruence-demonstration/ssssspi7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-congruence-demonstration/ssssspi7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-congruence-demonstration/ssssspi7"/>
      <lastmod>2026-11-02T17:06:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-congruence-demonstration/ssssspi7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-congruence-demonstration/ssssspi7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-congruence-demonstration/ssssspi7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-congruence-demonstration/ssssspi7"/>
      <lastmod>2026-11-02T17:06:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/icosahedron-construction-by-adrian-prados/ssssspin</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/icosahedron-construction-by-adrian-prados/ssssspin"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/icosahedron-construction-by-adrian-prados/ssssspin"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/icosahedron-construction-by-adrian-prados/ssssspin"/>
      <lastmod>2026-11-02T15:29:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/icosahedron-construction-by-adrian-prados/ssssspin</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/icosahedron-construction-by-adrian-prados/ssssspin"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/icosahedron-construction-by-adrian-prados/ssssspin"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/icosahedron-construction-by-adrian-prados/ssssspin"/>
      <lastmod>2026-11-02T15:29:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-same-side-exterior-angles/ssssspi2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-same-side-exterior-angles/ssssspi2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-same-side-exterior-angles/ssssspi2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-same-side-exterior-angles/ssssspi2"/>
      <lastmod>2026-11-01T21:38:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-same-side-exterior-angles/ssssspi2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-same-side-exterior-angles/ssssspi2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-same-side-exterior-angles/ssssspi2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-same-side-exterior-angles/ssssspi2"/>
      <lastmod>2026-11-01T21:38:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/position-vectors-in-3d/ssssspik</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/position-vectors-in-3d/ssssspik"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/position-vectors-in-3d/ssssspik"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/position-vectors-in-3d/ssssspik"/>
      <lastmod>2026-11-02T13:27:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/position-vectors-in-3d/ssssspik</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/position-vectors-in-3d/ssssspik"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/position-vectors-in-3d/ssssspik"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/position-vectors-in-3d/ssssspik"/>
      <lastmod>2026-11-02T13:27:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-surface-area/ssssspiz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-surface-area/ssssspiz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-surface-area/ssssspiz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-surface-area/ssssspiz"/>
      <lastmod>2026-11-02T12:34:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-surface-area/ssssspiz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-surface-area/ssssspiz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-surface-area/ssssspiz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-surface-area/ssssspiz"/>
      <lastmod>2026-11-02T12:34:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication/ssssspi0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication/ssssspi0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temperature-vs-time-multiplication/ssssspi0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication/ssssspi0"/>
      <lastmod>2026-11-02T03:07:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/temperature-vs-time-multiplication/ssssspi0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication/ssssspi0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temperature-vs-time-multiplication/ssssspi0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication/ssssspi0"/>
      <lastmod>2026-11-02T03:07:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-wave-visualizing-polar-functions-in-3d/ssssspid</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-wave-visualizing-polar-functions-in-3d/ssssspid"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-wave-visualizing-polar-functions-in-3d/ssssspid"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-wave-visualizing-polar-functions-in-3d/ssssspid"/>
      <lastmod>2026-11-02T00:54:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-wave-visualizing-polar-functions-in-3d/ssssspid</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-wave-visualizing-polar-functions-in-3d/ssssspid"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-wave-visualizing-polar-functions-in-3d/ssssspid"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-wave-visualizing-polar-functions-in-3d/ssssspid"/>
      <lastmod>2026-11-02T00:54:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-quadratic-equations/ssssspif</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations/ssssspif"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-quadratic-equations/ssssspif"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations/ssssspif"/>
      <lastmod>2026-11-01T21:28:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-quadratic-equations/ssssspif</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations/ssssspif"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-quadratic-equations/ssssspif"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-quadratic-equations/ssssspif"/>
      <lastmod>2026-11-01T21:28:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-plane-and-hyperboloid-of-one-sheet/ssssspi8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-plane-and-hyperboloid-of-one-sheet/ssssspi8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-plane-and-hyperboloid-of-one-sheet/ssssspi8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-plane-and-hyperboloid-of-one-sheet/ssssspi8"/>
      <lastmod>2026-11-02T17:39:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-plane-and-hyperboloid-of-one-sheet/ssssspi8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-plane-and-hyperboloid-of-one-sheet/ssssspi8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-plane-and-hyperboloid-of-one-sheet/ssssspi8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-plane-and-hyperboloid-of-one-sheet/ssssspi8"/>
      <lastmod>2026-11-02T17:39:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-demonstration/ssssspiu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-demonstration/ssssspiu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-demonstration/ssssspiu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-demonstration/ssssspiu"/>
      <lastmod>2026-11-01T20:53:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-demonstration/ssssspiu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-demonstration/ssssspiu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-demonstration/ssssspiu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-demonstration/ssssspiu"/>
      <lastmod>2026-11-01T20:53:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/binary-classification-test/ssssspi5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binary-classification-test/ssssspi5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binary-classification-test/ssssspi5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binary-classification-test/ssssspi5"/>
      <lastmod>2026-11-01T23:13:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/binary-classification-test/ssssspi5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binary-classification-test/ssssspi5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binary-classification-test/ssssspi5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binary-classification-test/ssssspi5"/>
      <lastmod>2026-11-01T23:13:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surfaces-of-revolution-helical-cross-section/ssssspib</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surfaces-of-revolution-helical-cross-section/ssssspib"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surfaces-of-revolution-helical-cross-section/ssssspib"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surfaces-of-revolution-helical-cross-section/ssssspib"/>
      <lastmod>2026-11-01T21:34:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surfaces-of-revolution-helical-cross-section/ssssspib</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surfaces-of-revolution-helical-cross-section/ssssspib"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surfaces-of-revolution-helical-cross-section/ssssspib"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surfaces-of-revolution-helical-cross-section/ssssspib"/>
      <lastmod>2026-11-01T21:34:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/random-number-generator/ssssspi3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-number-generator/ssssspi3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-number-generator/ssssspi3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-number-generator/ssssspi3"/>
      <lastmod>2026-11-02T16:40:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/random-number-generator/ssssspi3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-number-generator/ssssspi3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-number-generator/ssssspi3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-number-generator/ssssspi3"/>
      <lastmod>2026-11-02T16:40:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-quadratic-functions-standard-form-1/ssssspiq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-standard-form-1/ssssspiq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-functions-standard-form-1/ssssspiq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-standard-form-1/ssssspiq"/>
      <lastmod>2026-11-01T21:53:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-quadratic-functions-standard-form-1/ssssspiq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-standard-form-1/ssssspiq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-functions-standard-form-1/ssssspiq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-standard-form-1/ssssspiq"/>
      <lastmod>2026-11-01T21:53:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construction-of-tangents-to-a-circle-from-an-external-point/ssssspi1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-tangents-to-a-circle-from-an-external-point/ssssspi1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-tangents-to-a-circle-from-an-external-point/ssssspi1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-tangents-to-a-circle-from-an-external-point/ssssspi1"/>
      <lastmod>2026-11-02T16:29:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construction-of-tangents-to-a-circle-from-an-external-point/ssssspi1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-tangents-to-a-circle-from-an-external-point/ssssspi1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-tangents-to-a-circle-from-an-external-point/ssssspi1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-tangents-to-a-circle-from-an-external-point/ssssspi1"/>
      <lastmod>2026-11-02T16:29:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/applications-of-matrices-and-determinants-by-d-vasu-raj/ssssspim</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/applications-of-matrices-and-determinants-by-d-vasu-raj/ssssspim"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/applications-of-matrices-and-determinants-by-d-vasu-raj/ssssspim"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/applications-of-matrices-and-determinants-by-d-vasu-raj/ssssspim"/>
      <lastmod>2026-11-02T00:22:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/applications-of-matrices-and-determinants-by-d-vasu-raj/ssssspim</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/applications-of-matrices-and-determinants-by-d-vasu-raj/ssssspim"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/applications-of-matrices-and-determinants-by-d-vasu-raj/ssssspim"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/applications-of-matrices-and-determinants-by-d-vasu-raj/ssssspim"/>
      <lastmod>2026-11-02T00:22:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/different-parameterizations-demo/ssssspij</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/different-parameterizations-demo/ssssspij"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/different-parameterizations-demo/ssssspij"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/different-parameterizations-demo/ssssspij"/>
      <lastmod>2026-11-02T18:54:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/different-parameterizations-demo/ssssspij</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/different-parameterizations-demo/ssssspij"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/different-parameterizations-demo/ssssspij"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/different-parameterizations-demo/ssssspij"/>
      <lastmod>2026-11-02T18:54:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilation-of-quadratic-function-y-ax-2/ssssspip</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-of-quadratic-function-y-ax-2/ssssspip"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-of-quadratic-function-y-ax-2/ssssspip"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-of-quadratic-function-y-ax-2/ssssspip"/>
      <lastmod>2026-11-02T09:49:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilation-of-quadratic-function-y-ax-2/ssssspip</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-of-quadratic-function-y-ax-2/ssssspip"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-of-quadratic-function-y-ax-2/ssssspip"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-of-quadratic-function-y-ax-2/ssssspip"/>
      <lastmod>2026-11-02T09:49:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/icosidodecahedron-3d-construction-in-geogebra/ssssspiw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/icosidodecahedron-3d-construction-in-geogebra/ssssspiw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/icosidodecahedron-3d-construction-in-geogebra/ssssspiw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/icosidodecahedron-3d-construction-in-geogebra/ssssspiw"/>
      <lastmod>2026-11-02T18:42:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/icosidodecahedron-3d-construction-in-geogebra/ssssspiw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/icosidodecahedron-3d-construction-in-geogebra/ssssspiw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/icosidodecahedron-3d-construction-in-geogebra/ssssspiw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/icosidodecahedron-3d-construction-in-geogebra/ssssspiw"/>
      <lastmod>2026-11-02T18:42:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-equilateral-triangle-construction/ssssspi6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-equilateral-triangle-construction/ssssspi6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-equilateral-triangle-construction/ssssspi6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-equilateral-triangle-construction/ssssspi6"/>
      <lastmod>2026-11-01T21:23:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-equilateral-triangle-construction/ssssspi6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-equilateral-triangle-construction/ssssspi6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-equilateral-triangle-construction/ssssspi6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-equilateral-triangle-construction/ssssspi6"/>
      <lastmod>2026-11-01T21:23:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-sound-of-a-sine-function/ssssspig</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-sound-of-a-sine-function/ssssspig"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-sound-of-a-sine-function/ssssspig"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-sound-of-a-sine-function/ssssspig"/>
      <lastmod>2026-11-02T06:48:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-sound-of-a-sine-function/ssssspig</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-sound-of-a-sine-function/ssssspig"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-sound-of-a-sine-function/ssssspig"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-sound-of-a-sine-function/ssssspig"/>
      <lastmod>2026-11-02T06:48:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/asa-triangle-congruence-exploration/ssssspi9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/asa-triangle-congruence-exploration/ssssspi9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/asa-triangle-congruence-exploration/ssssspi9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/asa-triangle-congruence-exploration/ssssspi9"/>
      <lastmod>2026-11-01T21:25:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/asa-triangle-congruence-exploration/ssssspi9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/asa-triangle-congruence-exploration/ssssspi9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/asa-triangle-congruence-exploration/ssssspi9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/asa-triangle-congruence-exploration/ssssspi9"/>
      <lastmod>2026-11-01T21:25:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/continuous-variable-probability-function-demo/ssssspie</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/continuous-variable-probability-function-demo/ssssspie"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/continuous-variable-probability-function-demo/ssssspie"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/continuous-variable-probability-function-demo/ssssspie"/>
      <lastmod>2026-11-02T13:41:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/continuous-variable-probability-function-demo/ssssspie</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/continuous-variable-probability-function-demo/ssssspie"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/continuous-variable-probability-function-demo/ssssspie"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/continuous-variable-probability-function-demo/ssssspie"/>
      <lastmod>2026-11-02T13:41:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/eleven-patterns-of-the-cube/ssssspiv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eleven-patterns-of-the-cube/ssssspiv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eleven-patterns-of-the-cube/ssssspiv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eleven-patterns-of-the-cube/ssssspiv"/>
      <lastmod>2026-11-02T18:31:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/eleven-patterns-of-the-cube/ssssspiv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eleven-patterns-of-the-cube/ssssspiv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eleven-patterns-of-the-cube/ssssspiv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eleven-patterns-of-the-cube/ssssspiv"/>
      <lastmod>2026-11-02T18:31:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-trig-graph-relationship/ssssspi4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-trig-graph-relationship/ssssspi4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-trig-graph-relationship/ssssspi4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-trig-graph-relationship/ssssspi4"/>
      <lastmod>2026-11-02T16:47:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-trig-graph-relationship/ssssspi4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-trig-graph-relationship/ssssspi4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-trig-graph-relationship/ssssspi4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-trig-graph-relationship/ssssspi4"/>
      <lastmod>2026-11-02T16:47:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-root-function-pattern-investigation/ssssspil</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-function-pattern-investigation/ssssspil"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-function-pattern-investigation/ssssspil"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-function-pattern-investigation/ssssspil"/>
      <lastmod>2026-11-02T18:57:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-root-function-pattern-investigation/ssssspil</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-function-pattern-investigation/ssssspil"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-function-pattern-investigation/ssssspil"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-function-pattern-investigation/ssssspil"/>
      <lastmod>2026-11-02T18:57:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-distribution-with-1000-trials-dynamic-bar-chart/ssssspiy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-with-1000-trials-dynamic-bar-chart/ssssspiy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-with-1000-trials-dynamic-bar-chart/ssssspiy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-with-1000-trials-dynamic-bar-chart/ssssspiy"/>
      <lastmod>2026-11-01T20:45:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-distribution-with-1000-trials-dynamic-bar-chart/ssssspiy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-with-1000-trials-dynamic-bar-chart/ssssspiy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-with-1000-trials-dynamic-bar-chart/ssssspiy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-with-1000-trials-dynamic-bar-chart/ssssspiy"/>
      <lastmod>2026-11-01T20:45:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-the-vall-companys-logo-with-vectors-and-transformation/ssssspia</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-vall-companys-logo-with-vectors-and-transformation/ssssspia"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-the-vall-companys-logo-with-vectors-and-transformation/ssssspia"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-vall-companys-logo-with-vectors-and-transformation/ssssspia"/>
      <lastmod>2026-11-01T20:56:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-the-vall-companys-logo-with-vectors-and-transformation/ssssspia</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-vall-companys-logo-with-vectors-and-transformation/ssssspia"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-the-vall-companys-logo-with-vectors-and-transformation/ssssspia"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-vall-companys-logo-with-vectors-and-transformation/ssssspia"/>
      <lastmod>2026-11-01T20:56:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/an-objection-to-transcendental-definition-quadrilateral-circumcircle-and-rotati/ssssspic</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/an-objection-to-transcendental-definition-quadrilateral-circumcircle-and-rotati/ssssspic"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/an-objection-to-transcendental-definition-quadrilateral-circumcircle-and-rotati/ssssspic"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/an-objection-to-transcendental-definition-quadrilateral-circumcircle-and-rotati/ssssspic"/>
      <lastmod>2026-11-01T21:41:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/an-objection-to-transcendental-definition-quadrilateral-circumcircle-and-rotati/ssssspic</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/an-objection-to-transcendental-definition-quadrilateral-circumcircle-and-rotati/ssssspic"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/an-objection-to-transcendental-definition-quadrilateral-circumcircle-and-rotati/ssssspic"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/an-objection-to-transcendental-definition-quadrilateral-circumcircle-and-rotati/ssssspic"/>
      <lastmod>2026-11-01T21:41:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangular-prism-net-by-mr-martinez/ssssspir</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-prism-net-by-mr-martinez/ssssspir"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-prism-net-by-mr-martinez/ssssspir"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-prism-net-by-mr-martinez/ssssspir"/>
      <lastmod>2026-11-02T16:39:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangular-prism-net-by-mr-martinez/ssssspir</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-prism-net-by-mr-martinez/ssssspir"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-prism-net-by-mr-martinez/ssssspir"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-prism-net-by-mr-martinez/ssssspir"/>
      <lastmod>2026-11-02T16:39:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-triangle-ratios/ssssspih</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-ratios/ssssspih"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-ratios/ssssspih"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-ratios/ssssspih"/>
      <lastmod>2026-11-01T23:37:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-triangle-ratios/ssssspih</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-ratios/ssssspih"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-ratios/ssssspih"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-ratios/ssssspih"/>
      <lastmod>2026-11-01T23:37:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-graphs-and-geometric-shapes-interaction-demo/ssssspit</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-graphs-and-geometric-shapes-interaction-demo/ssssspit"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-graphs-and-geometric-shapes-interaction-demo/ssssspit"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-graphs-and-geometric-shapes-interaction-demo/ssssspit"/>
      <lastmod>2026-11-02T18:25:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-graphs-and-geometric-shapes-interaction-demo/ssssspit</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-graphs-and-geometric-shapes-interaction-demo/ssssspit"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-graphs-and-geometric-shapes-interaction-demo/ssssspit"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-graphs-and-geometric-shapes-interaction-demo/ssssspit"/>
      <lastmod>2026-11-02T18:25:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-illustration-of-bearing/ssssspix</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-bearing/ssssspix"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-bearing/ssssspix"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-bearing/ssssspix"/>
      <lastmod>2026-11-02T18:05:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-illustration-of-bearing/ssssspix</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-bearing/ssssspix"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-bearing/ssssspix"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-bearing/ssssspix"/>
      <lastmod>2026-11-02T18:05:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definition-matching-problems-in-statistics/ssssspii</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-matching-problems-in-statistics/ssssspii"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-matching-problems-in-statistics/ssssspii"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-matching-problems-in-statistics/ssssspii"/>
      <lastmod>2026-11-02T17:03:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definition-matching-problems-in-statistics/ssssspii</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-matching-problems-in-statistics/ssssspii"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-matching-problems-in-statistics/ssssspii"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-matching-problems-in-statistics/ssssspii"/>
      <lastmod>2026-11-02T17:03:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/recam-n-s-sequence-visualization/ssssspio</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/recam-n-s-sequence-visualization/ssssspio"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/recam-n-s-sequence-visualization/ssssspio"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/recam-n-s-sequence-visualization/ssssspio"/>
      <lastmod>2026-11-02T18:30:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/recam-n-s-sequence-visualization/ssssspio</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/recam-n-s-sequence-visualization/ssssspio"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/recam-n-s-sequence-visualization/ssssspio"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/recam-n-s-sequence-visualization/ssssspio"/>
      <lastmod>2026-11-02T18:30:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-approximation-to-the-riemann-integral/ssssspos</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-approximation-to-the-riemann-integral/ssssspos"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-approximation-to-the-riemann-integral/ssssspos"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-approximation-to-the-riemann-integral/ssssspos"/>
      <lastmod>2026-11-02T17:49:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-approximation-to-the-riemann-integral/ssssspos</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-approximation-to-the-riemann-integral/ssssspos"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-approximation-to-the-riemann-integral/ssssspos"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-approximation-to-the-riemann-integral/ssssspos"/>
      <lastmod>2026-11-02T17:49:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-problems-with-systems-of-equations/ssssspo7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-problems-with-systems-of-equations/ssssspo7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-problems-with-systems-of-equations/ssssspo7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-problems-with-systems-of-equations/ssssspo7"/>
      <lastmod>2026-11-01T22:59:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-problems-with-systems-of-equations/ssssspo7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-problems-with-systems-of-equations/ssssspo7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-problems-with-systems-of-equations/ssssspo7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-problems-with-systems-of-equations/ssssspo7"/>
      <lastmod>2026-11-01T22:59:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-cone-by-elizabethdowns/ssssspon</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cone-by-elizabethdowns/ssssspon"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cone-by-elizabethdowns/ssssspon"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cone-by-elizabethdowns/ssssspon"/>
      <lastmod>2026-11-02T18:59:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-cone-by-elizabethdowns/ssssspon</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cone-by-elizabethdowns/ssssspon"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cone-by-elizabethdowns/ssssspon"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cone-by-elizabethdowns/ssssspon"/>
      <lastmod>2026-11-02T18:59:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/chocolate-bar-paradox/ssssspo2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chocolate-bar-paradox/ssssspo2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chocolate-bar-paradox/ssssspo2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chocolate-bar-paradox/ssssspo2"/>
      <lastmod>2026-11-01T21:25:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/chocolate-bar-paradox/ssssspo2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chocolate-bar-paradox/ssssspo2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chocolate-bar-paradox/ssssspo2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chocolate-bar-paradox/ssssspo2"/>
      <lastmod>2026-11-01T21:25:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/divide-a-triangle-into-smaller-triangles-with-equal-perimeter/ssssspok</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/divide-a-triangle-into-smaller-triangles-with-equal-perimeter/ssssspok"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/divide-a-triangle-into-smaller-triangles-with-equal-perimeter/ssssspok"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/divide-a-triangle-into-smaller-triangles-with-equal-perimeter/ssssspok"/>
      <lastmod>2026-11-01T21:44:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/divide-a-triangle-into-smaller-triangles-with-equal-perimeter/ssssspok</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/divide-a-triangle-into-smaller-triangles-with-equal-perimeter/ssssspok"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/divide-a-triangle-into-smaller-triangles-with-equal-perimeter/ssssspok"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/divide-a-triangle-into-smaller-triangles-with-equal-perimeter/ssssspok"/>
      <lastmod>2026-11-01T21:44:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/create-a-cylinder-with-given-lateral-area/ssssspoz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-a-cylinder-with-given-lateral-area/ssssspoz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-a-cylinder-with-given-lateral-area/ssssspoz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-a-cylinder-with-given-lateral-area/ssssspoz"/>
      <lastmod>2026-11-01T19:25:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/create-a-cylinder-with-given-lateral-area/ssssspoz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/create-a-cylinder-with-given-lateral-area/ssssspoz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/create-a-cylinder-with-given-lateral-area/ssssspoz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/create-a-cylinder-with-given-lateral-area/ssssspoz"/>
      <lastmod>2026-11-01T19:25:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/check-golden-proportions/ssssspo0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/check-golden-proportions/ssssspo0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/check-golden-proportions/ssssspo0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/check-golden-proportions/ssssspo0"/>
      <lastmod>2026-11-02T11:42:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/check-golden-proportions/ssssspo0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/check-golden-proportions/ssssspo0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/check-golden-proportions/ssssspo0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/check-golden-proportions/ssssspo0"/>
      <lastmod>2026-11-02T11:42:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/least-squares-1/ssssspod</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/least-squares-1/ssssspod"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/least-squares-1/ssssspod"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/least-squares-1/ssssspod"/>
      <lastmod>2026-11-01T21:10:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/least-squares-1/ssssspod</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/least-squares-1/ssssspod"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/least-squares-1/ssssspod"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/least-squares-1/ssssspod"/>
      <lastmod>2026-11-01T21:10:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-squares-and-two-triangles/ssssspof</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-squares-and-two-triangles/ssssspof"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-squares-and-two-triangles/ssssspof"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-squares-and-two-triangles/ssssspof"/>
      <lastmod>2026-11-02T18:17:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-squares-and-two-triangles/ssssspof</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-squares-and-two-triangles/ssssspof"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-squares-and-two-triangles/ssssspof"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-squares-and-two-triangles/ssssspof"/>
      <lastmod>2026-11-02T18:17:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractions-and-circle-visualizing-fractions-with-circle-sectors/ssssspo8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-and-circle-visualizing-fractions-with-circle-sectors/ssssspo8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-and-circle-visualizing-fractions-with-circle-sectors/ssssspo8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-and-circle-visualizing-fractions-with-circle-sectors/ssssspo8"/>
      <lastmod>2026-11-02T18:10:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractions-and-circle-visualizing-fractions-with-circle-sectors/ssssspo8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-and-circle-visualizing-fractions-with-circle-sectors/ssssspo8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-and-circle-visualizing-fractions-with-circle-sectors/ssssspo8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-and-circle-visualizing-fractions-with-circle-sectors/ssssspo8"/>
      <lastmod>2026-11-02T18:10:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/side-side-angle-ssa-discovery-adjust-two-sides-and-the-angle/ssssspou</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/side-side-angle-ssa-discovery-adjust-two-sides-and-the-angle/ssssspou"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/side-side-angle-ssa-discovery-adjust-two-sides-and-the-angle/ssssspou"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/side-side-angle-ssa-discovery-adjust-two-sides-and-the-angle/ssssspou"/>
      <lastmod>2026-11-02T18:38:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/side-side-angle-ssa-discovery-adjust-two-sides-and-the-angle/ssssspou</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/side-side-angle-ssa-discovery-adjust-two-sides-and-the-angle/ssssspou"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/side-side-angle-ssa-discovery-adjust-two-sides-and-the-angle/ssssspou"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/side-side-angle-ssa-discovery-adjust-two-sides-and-the-angle/ssssspou"/>
      <lastmod>2026-11-02T18:38:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sierpinski-triangle-by-steve-phelps/ssssspo5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sierpinski-triangle-by-steve-phelps/ssssspo5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sierpinski-triangle-by-steve-phelps/ssssspo5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sierpinski-triangle-by-steve-phelps/ssssspo5"/>
      <lastmod>2026-11-02T12:19:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sierpinski-triangle-by-steve-phelps/ssssspo5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sierpinski-triangle-by-steve-phelps/ssssspo5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sierpinski-triangle-by-steve-phelps/ssssspo5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sierpinski-triangle-by-steve-phelps/ssssspo5"/>
      <lastmod>2026-11-02T12:19:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-calculation-example-15-4-1/ssssspob</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-calculation-example-15-4-1/ssssspob"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-calculation-example-15-4-1/ssssspob"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-calculation-example-15-4-1/ssssspob"/>
      <lastmod>2026-11-01T23:44:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-calculation-example-15-4-1/ssssspob</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-calculation-example-15-4-1/ssssspob"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-calculation-example-15-4-1/ssssspob"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-calculation-example-15-4-1/ssssspob"/>
      <lastmod>2026-11-01T23:44:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-azimah-shahirah/ssssspo3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-azimah-shahirah/ssssspo3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-azimah-shahirah/ssssspo3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-azimah-shahirah/ssssspo3"/>
      <lastmod>2026-11-02T14:59:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-azimah-shahirah/ssssspo3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-azimah-shahirah/ssssspo3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-azimah-shahirah/ssssspo3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-azimah-shahirah/ssssspo3"/>
      <lastmod>2026-11-02T14:59:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-properties-of-perpendicular-bisectors/ssssspoq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-properties-of-perpendicular-bisectors/ssssspoq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-properties-of-perpendicular-bisectors/ssssspoq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-properties-of-perpendicular-bisectors/ssssspoq"/>
      <lastmod>2026-11-02T02:36:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-properties-of-perpendicular-bisectors/ssssspoq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-properties-of-perpendicular-bisectors/ssssspoq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-properties-of-perpendicular-bisectors/ssssspoq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-properties-of-perpendicular-bisectors/ssssspoq"/>
      <lastmod>2026-11-02T02:36:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definite-integral-function-addition/ssssspo1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-function-addition/ssssspo1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-function-addition/ssssspo1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-function-addition/ssssspo1"/>
      <lastmod>2026-11-01T23:09:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definite-integral-function-addition/ssssspo1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definite-integral-function-addition/ssssspo1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definite-integral-function-addition/ssssspo1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definite-integral-function-addition/ssssspo1"/>
      <lastmod>2026-11-01T23:09:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prime-numbers-game-visualizing-primes-with-table-and-circles/ssssspom</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prime-numbers-game-visualizing-primes-with-table-and-circles/ssssspom"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prime-numbers-game-visualizing-primes-with-table-and-circles/ssssspom"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prime-numbers-game-visualizing-primes-with-table-and-circles/ssssspom"/>
      <lastmod>2026-11-02T09:34:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prime-numbers-game-visualizing-primes-with-table-and-circles/ssssspom</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prime-numbers-game-visualizing-primes-with-table-and-circles/ssssspom"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prime-numbers-game-visualizing-primes-with-table-and-circles/ssssspom"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prime-numbers-game-visualizing-primes-with-table-and-circles/ssssspom"/>
      <lastmod>2026-11-02T09:34:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-on-the-cone/ssssspoj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-on-the-cone/ssssspoj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-on-the-cone/ssssspoj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-on-the-cone/ssssspoj"/>
      <lastmod>2026-11-02T18:23:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-on-the-cone/ssssspoj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-on-the-cone/ssssspoj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-on-the-cone/ssssspoj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-on-the-cone/ssssspoj"/>
      <lastmod>2026-11-02T18:23:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-graphs-6/ssssspop</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-graphs-6/ssssspop"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-graphs-6/ssssspop"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-graphs-6/ssssspop"/>
      <lastmod>2026-11-02T12:20:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-graphs-6/ssssspop</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-graphs-6/ssssspop"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-graphs-6/ssssspop"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-graphs-6/ssssspop"/>
      <lastmod>2026-11-02T12:20:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-constructions/ssssspow</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-constructions/ssssspow"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-constructions/ssssspow"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-constructions/ssssspow"/>
      <lastmod>2026-11-02T18:44:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-constructions/ssssspow</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-constructions/ssssspow"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-constructions/ssssspow"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-constructions/ssssspow"/>
      <lastmod>2026-11-02T18:44:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-construction-by-taylor-rish/ssssspo6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-construction-by-taylor-rish/ssssspo6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-construction-by-taylor-rish/ssssspo6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-construction-by-taylor-rish/ssssspo6"/>
      <lastmod>2026-11-02T12:00:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-construction-by-taylor-rish/ssssspo6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-construction-by-taylor-rish/ssssspo6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-construction-by-taylor-rish/ssssspo6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-construction-by-taylor-rish/ssssspo6"/>
      <lastmod>2026-11-02T12:00:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/upper-sum-for-definite-integral/ssssspog</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/upper-sum-for-definite-integral/ssssspog"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/upper-sum-for-definite-integral/ssssspog"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/upper-sum-for-definite-integral/ssssspog"/>
      <lastmod>2026-11-02T16:29:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/upper-sum-for-definite-integral/ssssspog</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/upper-sum-for-definite-integral/ssssspog"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/upper-sum-for-definite-integral/ssssspog"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/upper-sum-for-definite-integral/ssssspog"/>
      <lastmod>2026-11-02T16:29:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-vectors-and-integral-calculus/ssssspo9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-vectors-and-integral-calculus/ssssspo9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-vectors-and-integral-calculus/ssssspo9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-vectors-and-integral-calculus/ssssspo9"/>
      <lastmod>2026-11-01T21:25:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-vectors-and-integral-calculus/ssssspo9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-vectors-and-integral-calculus/ssssspo9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-vectors-and-integral-calculus/ssssspo9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-vectors-and-integral-calculus/ssssspo9"/>
      <lastmod>2026-11-01T21:25:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-inequalities-by-michael-green/ssssspoe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-inequalities-by-michael-green/ssssspoe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-inequalities-by-michael-green/ssssspoe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-inequalities-by-michael-green/ssssspoe"/>
      <lastmod>2026-11-02T16:49:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-inequalities-by-michael-green/ssssspoe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-inequalities-by-michael-green/ssssspoe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-inequalities-by-michael-green/ssssspoe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-inequalities-by-michael-green/ssssspoe"/>
      <lastmod>2026-11-02T16:49:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logarithmic-action-2-reciprocal-property-dynamic-discovery/ssssspov</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-action-2-reciprocal-property-dynamic-discovery/ssssspov"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-action-2-reciprocal-property-dynamic-discovery/ssssspov"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-action-2-reciprocal-property-dynamic-discovery/ssssspov"/>
      <lastmod>2026-11-01T21:44:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logarithmic-action-2-reciprocal-property-dynamic-discovery/ssssspov</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-action-2-reciprocal-property-dynamic-discovery/ssssspov"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-action-2-reciprocal-property-dynamic-discovery/ssssspov"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-action-2-reciprocal-property-dynamic-discovery/ssssspov"/>
      <lastmod>2026-11-01T21:44:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/evaluating-6-trigonometric-functions-given-a-point-on-the-terminal-ray/ssssspo4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/evaluating-6-trigonometric-functions-given-a-point-on-the-terminal-ray/ssssspo4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/evaluating-6-trigonometric-functions-given-a-point-on-the-terminal-ray/ssssspo4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/evaluating-6-trigonometric-functions-given-a-point-on-the-terminal-ray/ssssspo4"/>
      <lastmod>2026-11-01T20:45:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/evaluating-6-trigonometric-functions-given-a-point-on-the-terminal-ray/ssssspo4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/evaluating-6-trigonometric-functions-given-a-point-on-the-terminal-ray/ssssspo4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/evaluating-6-trigonometric-functions-given-a-point-on-the-terminal-ray/ssssspo4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/evaluating-6-trigonometric-functions-given-a-point-on-the-terminal-ray/ssssspo4"/>
      <lastmod>2026-11-01T20:45:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-characteristics-demo/ssssspol</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-characteristics-demo/ssssspol"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-characteristics-demo/ssssspol"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-characteristics-demo/ssssspol"/>
      <lastmod>2026-11-01T22:09:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-characteristics-demo/ssssspol</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-characteristics-demo/ssssspol"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-characteristics-demo/ssssspol"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-characteristics-demo/ssssspol"/>
      <lastmod>2026-11-01T22:09:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-graphs-8-by-doug-ray/ssssspoy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-graphs-8-by-doug-ray/ssssspoy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-graphs-8-by-doug-ray/ssssspoy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-graphs-8-by-doug-ray/ssssspoy"/>
      <lastmod>2026-11-02T16:29:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-graphs-8-by-doug-ray/ssssspoy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-graphs-8-by-doug-ray/ssssspoy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-graphs-8-by-doug-ray/ssssspoy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-graphs-8-by-doug-ray/ssssspoy"/>
      <lastmod>2026-11-02T16:29:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-two-parametric-curves-via-implicit-curves-with-graphical-and-num/ssssspoa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-two-parametric-curves-via-implicit-curves-with-graphical-and-num/ssssspoa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-two-parametric-curves-via-implicit-curves-with-graphical-and-num/ssssspoa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-two-parametric-curves-via-implicit-curves-with-graphical-and-num/ssssspoa"/>
      <lastmod>2026-11-02T10:57:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-two-parametric-curves-via-implicit-curves-with-graphical-and-num/ssssspoa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-two-parametric-curves-via-implicit-curves-with-graphical-and-num/ssssspoa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-two-parametric-curves-via-implicit-curves-with-graphical-and-num/ssssspoa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-two-parametric-curves-via-implicit-curves-with-graphical-and-num/ssssspoa"/>
      <lastmod>2026-11-02T10:57:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/harmonic-addition-1-by-graeme-mcrae/ssssspoc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/harmonic-addition-1-by-graeme-mcrae/ssssspoc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/harmonic-addition-1-by-graeme-mcrae/ssssspoc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/harmonic-addition-1-by-graeme-mcrae/ssssspoc"/>
      <lastmod>2026-11-02T16:52:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/harmonic-addition-1-by-graeme-mcrae/ssssspoc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/harmonic-addition-1-by-graeme-mcrae/ssssspoc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/harmonic-addition-1-by-graeme-mcrae/ssssspoc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/harmonic-addition-1-by-graeme-mcrae/ssssspoc"/>
      <lastmod>2026-11-02T16:52:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-linear-inequalities-with-2-variables-quiz/ssssspor</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-inequalities-with-2-variables-quiz/ssssspor"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-inequalities-with-2-variables-quiz/ssssspor"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-inequalities-with-2-variables-quiz/ssssspor"/>
      <lastmod>2026-11-01T19:23:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-linear-inequalities-with-2-variables-quiz/ssssspor</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-inequalities-with-2-variables-quiz/ssssspor"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-inequalities-with-2-variables-quiz/ssssspor"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-inequalities-with-2-variables-quiz/ssssspor"/>
      <lastmod>2026-11-01T19:23:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-rectangles-rhombuses-and-squares/ssssspoh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-rectangles-rhombuses-and-squares/ssssspoh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-rectangles-rhombuses-and-squares/ssssspoh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-rectangles-rhombuses-and-squares/ssssspoh"/>
      <lastmod>2026-11-02T11:46:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-rectangles-rhombuses-and-squares/ssssspoh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-rectangles-rhombuses-and-squares/ssssspoh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-rectangles-rhombuses-and-squares/ssssspoh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-rectangles-rhombuses-and-squares/ssssspoh"/>
      <lastmod>2026-11-02T11:46:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-circle-by-tracy-moskowite/ssssspot</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-circle-by-tracy-moskowite/ssssspot"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-circle-by-tracy-moskowite/ssssspot"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-circle-by-tracy-moskowite/ssssspot"/>
      <lastmod>2026-11-02T18:14:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-circle-by-tracy-moskowite/ssssspot</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-circle-by-tracy-moskowite/ssssspot"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-circle-by-tracy-moskowite/ssssspot"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-circle-by-tracy-moskowite/ssssspot"/>
      <lastmod>2026-11-02T18:14:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/golden-gate-bridge/ssssspox</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/golden-gate-bridge/ssssspox"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/golden-gate-bridge/ssssspox"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/golden-gate-bridge/ssssspox"/>
      <lastmod>2026-11-02T11:06:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/golden-gate-bridge/ssssspox</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/golden-gate-bridge/ssssspox"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/golden-gate-bridge/ssssspox"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/golden-gate-bridge/ssssspox"/>
      <lastmod>2026-11-02T11:06:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/disc-method-volume-of-solid-of-revolution/ssssspoi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/disc-method-volume-of-solid-of-revolution/ssssspoi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/disc-method-volume-of-solid-of-revolution/ssssspoi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/disc-method-volume-of-solid-of-revolution/ssssspoi"/>
      <lastmod>2026-11-02T10:50:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/disc-method-volume-of-solid-of-revolution/ssssspoi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/disc-method-volume-of-solid-of-revolution/ssssspoi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/disc-method-volume-of-solid-of-revolution/ssssspoi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/disc-method-volume-of-solid-of-revolution/ssssspoi"/>
      <lastmod>2026-11-02T10:50:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/p3-2-making-parallel-lines-2/ssssspoo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p3-2-making-parallel-lines-2/ssssspoo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p3-2-making-parallel-lines-2/ssssspoo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p3-2-making-parallel-lines-2/ssssspoo"/>
      <lastmod>2026-11-02T00:20:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/p3-2-making-parallel-lines-2/ssssspoo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p3-2-making-parallel-lines-2/ssssspoo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p3-2-making-parallel-lines-2/ssssspoo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p3-2-making-parallel-lines-2/ssssspoo"/>
      <lastmod>2026-11-02T00:20:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphical-integer-addition-and-subtraction/ssssswss</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-integer-addition-and-subtraction/ssssswss"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-integer-addition-and-subtraction/ssssswss"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-integer-addition-and-subtraction/ssssswss"/>
      <lastmod>2026-11-01T21:36:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphical-integer-addition-and-subtraction/ssssswss</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-integer-addition-and-subtraction/ssssswss"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-integer-addition-and-subtraction/ssssswss"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-integer-addition-and-subtraction/ssssswss"/>
      <lastmod>2026-11-01T21:36:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/nets-of-a-rectangular-prism/sssssws7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nets-of-a-rectangular-prism/sssssws7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nets-of-a-rectangular-prism/sssssws7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nets-of-a-rectangular-prism/sssssws7"/>
      <lastmod>2026-11-02T02:37:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/nets-of-a-rectangular-prism/sssssws7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nets-of-a-rectangular-prism/sssssws7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nets-of-a-rectangular-prism/sssssws7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nets-of-a-rectangular-prism/sssssws7"/>
      <lastmod>2026-11-02T02:37:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-function-graphs-by-chris/ssssswsn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-function-graphs-by-chris/ssssswsn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-function-graphs-by-chris/ssssswsn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-function-graphs-by-chris/ssssswsn"/>
      <lastmod>2026-11-02T17:14:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-function-graphs-by-chris/ssssswsn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-function-graphs-by-chris/ssssswsn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-function-graphs-by-chris/ssssswsn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-function-graphs-by-chris/ssssswsn"/>
      <lastmod>2026-11-02T17:14:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-3d-getting-started-part-4/sssssws2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-3d-getting-started-part-4/sssssws2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-3d-getting-started-part-4/sssssws2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-3d-getting-started-part-4/sssssws2"/>
      <lastmod>2026-11-01T21:44:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-3d-getting-started-part-4/sssssws2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-3d-getting-started-part-4/sssssws2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-3d-getting-started-part-4/sssssws2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-3d-getting-started-part-4/sssssws2"/>
      <lastmod>2026-11-01T21:44:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-tetrahedra/ssssswsk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-tetrahedra/ssssswsk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-tetrahedra/ssssswsk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-tetrahedra/ssssswsk"/>
      <lastmod>2026-11-02T18:55:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-tetrahedra/ssssswsk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-tetrahedra/ssssswsk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-tetrahedra/ssssswsk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-tetrahedra/ssssswsk"/>
      <lastmod>2026-11-02T18:55:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-complex-roots-2020/ssssswsz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-complex-roots-2020/ssssswsz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-complex-roots-2020/ssssswsz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-complex-roots-2020/ssssswsz"/>
      <lastmod>2026-11-01T19:35:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-complex-roots-2020/ssssswsz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-complex-roots-2020/ssssswsz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-complex-roots-2020/ssssswsz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-complex-roots-2020/ssssswsz"/>
      <lastmod>2026-11-01T19:35:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-simulation-bike-wall/sssssws0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-simulation-bike-wall/sssssws0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-simulation-bike-wall/sssssws0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-simulation-bike-wall/sssssws0"/>
      <lastmod>2026-11-02T18:02:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-simulation-bike-wall/sssssws0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-simulation-bike-wall/sssssws0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-simulation-bike-wall/sssssws0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-simulation-bike-wall/sssssws0"/>
      <lastmod>2026-11-02T18:02:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-selecting-balls-by-richard-cooper/ssssswsd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-selecting-balls-by-richard-cooper/ssssswsd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-selecting-balls-by-richard-cooper/ssssswsd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-selecting-balls-by-richard-cooper/ssssswsd"/>
      <lastmod>2026-11-01T23:29:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-selecting-balls-by-richard-cooper/ssssswsd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-selecting-balls-by-richard-cooper/ssssswsd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-selecting-balls-by-richard-cooper/ssssswsd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-selecting-balls-by-richard-cooper/ssssswsd"/>
      <lastmod>2026-11-01T23:29:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/space-race-data/ssssswsf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/space-race-data/ssssswsf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/space-race-data/ssssswsf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/space-race-data/ssssswsf"/>
      <lastmod>2026-11-02T06:43:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/space-race-data/ssssswsf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/space-race-data/ssssswsf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/space-race-data/ssssswsf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/space-race-data/ssssswsf"/>
      <lastmod>2026-11-02T06:43:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perfect-square-trinomials/sssssws8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perfect-square-trinomials/sssssws8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perfect-square-trinomials/sssssws8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perfect-square-trinomials/sssssws8"/>
      <lastmod>2026-11-02T09:39:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perfect-square-trinomials/sssssws8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perfect-square-trinomials/sssssws8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perfect-square-trinomials/sssssws8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perfect-square-trinomials/sssssws8"/>
      <lastmod>2026-11-02T09:39:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/module-13-grouped-data-histogram/ssssswsu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/module-13-grouped-data-histogram/ssssswsu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/module-13-grouped-data-histogram/ssssswsu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/module-13-grouped-data-histogram/ssssswsu"/>
      <lastmod>2026-11-02T03:15:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/module-13-grouped-data-histogram/ssssswsu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/module-13-grouped-data-histogram/ssssswsu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/module-13-grouped-data-histogram/ssssswsu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/module-13-grouped-data-histogram/ssssswsu"/>
      <lastmod>2026-11-02T03:15:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/combined-translation/sssssws5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/combined-translation/sssssws5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/combined-translation/sssssws5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/combined-translation/sssssws5"/>
      <lastmod>2026-11-01T20:56:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/combined-translation/sssssws5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/combined-translation/sssssws5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/combined-translation/sssssws5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/combined-translation/sssssws5"/>
      <lastmod>2026-11-01T20:56:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reference-angles-and-the-unit-circle/ssssswsb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reference-angles-and-the-unit-circle/ssssswsb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reference-angles-and-the-unit-circle/ssssswsb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reference-angles-and-the-unit-circle/ssssswsb"/>
      <lastmod>2026-11-02T02:23:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reference-angles-and-the-unit-circle/ssssswsb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reference-angles-and-the-unit-circle/ssssswsb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reference-angles-and-the-unit-circle/ssssswsb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reference-angles-and-the-unit-circle/ssssswsb"/>
      <lastmod>2026-11-02T02:23:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/algebra-view-integrated-demonstration-of-functions-trigonometry-and-logic/sssssws3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebra-view-integrated-demonstration-of-functions-trigonometry-and-logic/sssssws3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebra-view-integrated-demonstration-of-functions-trigonometry-and-logic/sssssws3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebra-view-integrated-demonstration-of-functions-trigonometry-and-logic/sssssws3"/>
      <lastmod>2026-11-01T21:46:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/algebra-view-integrated-demonstration-of-functions-trigonometry-and-logic/sssssws3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebra-view-integrated-demonstration-of-functions-trigonometry-and-logic/sssssws3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebra-view-integrated-demonstration-of-functions-trigonometry-and-logic/sssssws3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebra-view-integrated-demonstration-of-functions-trigonometry-and-logic/sssssws3"/>
      <lastmod>2026-11-01T21:46:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rational-equations/ssssswsq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rational-equations/ssssswsq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rational-equations/ssssswsq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rational-equations/ssssswsq"/>
      <lastmod>2026-11-02T00:39:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rational-equations/ssssswsq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rational-equations/ssssswsq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rational-equations/ssssswsq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rational-equations/ssssswsq"/>
      <lastmod>2026-11-02T00:39:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translating-parabolas-up-or-down/sssssws1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translating-parabolas-up-or-down/sssssws1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translating-parabolas-up-or-down/sssssws1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translating-parabolas-up-or-down/sssssws1"/>
      <lastmod>2026-11-02T13:10:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translating-parabolas-up-or-down/sssssws1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translating-parabolas-up-or-down/sssssws1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translating-parabolas-up-or-down/sssssws1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translating-parabolas-up-or-down/sssssws1"/>
      <lastmod>2026-11-02T13:10:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/one-step-equations-practice/ssssswsm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-step-equations-practice/ssssswsm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-step-equations-practice/ssssswsm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-step-equations-practice/ssssswsm"/>
      <lastmod>2026-11-01T19:34:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/one-step-equations-practice/ssssswsm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-step-equations-practice/ssssswsm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-step-equations-practice/ssssswsm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-step-equations-practice/ssssswsm"/>
      <lastmod>2026-11-01T19:34:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-subtraction-tail-to-tail-method-interactive-demo/ssssswsj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-subtraction-tail-to-tail-method-interactive-demo/ssssswsj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-subtraction-tail-to-tail-method-interactive-demo/ssssswsj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-subtraction-tail-to-tail-method-interactive-demo/ssssswsj"/>
      <lastmod>2026-11-02T18:35:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-subtraction-tail-to-tail-method-interactive-demo/ssssswsj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-subtraction-tail-to-tail-method-interactive-demo/ssssswsj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-subtraction-tail-to-tail-method-interactive-demo/ssssswsj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-subtraction-tail-to-tail-method-interactive-demo/ssssswsj"/>
      <lastmod>2026-11-02T18:35:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-fractions-with-same-numerator-by-rohit-roy-4/ssssswsp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-fractions-with-same-numerator-by-rohit-roy-4/ssssswsp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-fractions-with-same-numerator-by-rohit-roy-4/ssssswsp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-fractions-with-same-numerator-by-rohit-roy-4/ssssswsp"/>
      <lastmod>2026-11-02T02:50:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-fractions-with-same-numerator-by-rohit-roy-4/ssssswsp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-fractions-with-same-numerator-by-rohit-roy-4/ssssswsp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-fractions-with-same-numerator-by-rohit-roy-4/ssssswsp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-fractions-with-same-numerator-by-rohit-roy-4/ssssswsp"/>
      <lastmod>2026-11-02T02:50:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inscribed-polygon-by-shayla-arvizu/ssssswsw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inscribed-polygon-by-shayla-arvizu/ssssswsw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inscribed-polygon-by-shayla-arvizu/ssssswsw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inscribed-polygon-by-shayla-arvizu/ssssswsw"/>
      <lastmod>2026-11-02T12:27:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inscribed-polygon-by-shayla-arvizu/ssssswsw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inscribed-polygon-by-shayla-arvizu/ssssswsw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inscribed-polygon-by-shayla-arvizu/ssssswsw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inscribed-polygon-by-shayla-arvizu/ssssswsw"/>
      <lastmod>2026-11-02T12:27:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivatives-of-exponential-functions-by-bhnmath/sssssws6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivatives-of-exponential-functions-by-bhnmath/sssssws6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivatives-of-exponential-functions-by-bhnmath/sssssws6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivatives-of-exponential-functions-by-bhnmath/sssssws6"/>
      <lastmod>2026-11-02T16:41:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivatives-of-exponential-functions-by-bhnmath/sssssws6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivatives-of-exponential-functions-by-bhnmath/sssssws6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivatives-of-exponential-functions-by-bhnmath/sssssws6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivatives-of-exponential-functions-by-bhnmath/sssssws6"/>
      <lastmod>2026-11-02T16:41:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-rhombus-kite/ssssswsg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-rhombus-kite/ssssswsg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-rhombus-kite/ssssswsg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-rhombus-kite/ssssswsg"/>
      <lastmod>2026-11-02T03:17:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-rhombus-kite/ssssswsg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-rhombus-kite/ssssswsg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-rhombus-kite/ssssswsg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-rhombus-kite/ssssswsg"/>
      <lastmod>2026-11-02T03:17:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/standard-transformations-of-sine-and-cosine/sssssws9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-transformations-of-sine-and-cosine/sssssws9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-transformations-of-sine-and-cosine/sssssws9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-transformations-of-sine-and-cosine/sssssws9"/>
      <lastmod>2026-11-02T02:35:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/standard-transformations-of-sine-and-cosine/sssssws9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-transformations-of-sine-and-cosine/sssssws9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-transformations-of-sine-and-cosine/sssssws9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-transformations-of-sine-and-cosine/sssssws9"/>
      <lastmod>2026-11-02T02:35:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/illustration-of-congruent-line-segments/ssssswse</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/illustration-of-congruent-line-segments/ssssswse"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/illustration-of-congruent-line-segments/ssssswse"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/illustration-of-congruent-line-segments/ssssswse"/>
      <lastmod>2026-11-02T00:42:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/illustration-of-congruent-line-segments/ssssswse</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/illustration-of-congruent-line-segments/ssssswse"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/illustration-of-congruent-line-segments/ssssswse"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/illustration-of-congruent-line-segments/ssssswse"/>
      <lastmod>2026-11-02T00:42:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-cuboids/ssssswsv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-cuboids/ssssswsv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-cuboids/ssssswsv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-cuboids/ssssswsv"/>
      <lastmod>2026-11-02T17:46:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-cuboids/ssssswsv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-cuboids/ssssswsv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-cuboids/ssssswsv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-cuboids/ssssswsv"/>
      <lastmod>2026-11-02T17:46:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/determine-a-straight-line-with-a-given-gradient/sssssws4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/determine-a-straight-line-with-a-given-gradient/sssssws4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/determine-a-straight-line-with-a-given-gradient/sssssws4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/determine-a-straight-line-with-a-given-gradient/sssssws4"/>
      <lastmod>2026-11-01T19:25:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/determine-a-straight-line-with-a-given-gradient/sssssws4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/determine-a-straight-line-with-a-given-gradient/sssssws4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/determine-a-straight-line-with-a-given-gradient/sssssws4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/determine-a-straight-line-with-a-given-gradient/sssssws4"/>
      <lastmod>2026-11-01T19:25:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-and-hyperbola-a-unified-visual-exploration/ssssswsl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-hyperbola-a-unified-visual-exploration/ssssswsl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-hyperbola-a-unified-visual-exploration/ssssswsl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-hyperbola-a-unified-visual-exploration/ssssswsl"/>
      <lastmod>2026-11-01T19:24:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-and-hyperbola-a-unified-visual-exploration/ssssswsl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-hyperbola-a-unified-visual-exploration/ssssswsl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-hyperbola-a-unified-visual-exploration/ssssswsl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-hyperbola-a-unified-visual-exploration/ssssswsl"/>
      <lastmod>2026-11-01T19:24:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformation-of-quadratic-functions-shifts-stretches-and-intersections/ssssswsy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformation-of-quadratic-functions-shifts-stretches-and-intersections/ssssswsy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformation-of-quadratic-functions-shifts-stretches-and-intersections/ssssswsy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformation-of-quadratic-functions-shifts-stretches-and-intersections/ssssswsy"/>
      <lastmod>2026-11-02T13:36:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformation-of-quadratic-functions-shifts-stretches-and-intersections/ssssswsy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformation-of-quadratic-functions-shifts-stretches-and-intersections/ssssswsy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformation-of-quadratic-functions-shifts-stretches-and-intersections/ssssswsy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformation-of-quadratic-functions-shifts-stretches-and-intersections/ssssswsy"/>
      <lastmod>2026-11-02T13:36:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-frikkie81-2/ssssswsa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-frikkie81-2/ssssswsa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-frikkie81-2/ssssswsa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-frikkie81-2/ssssswsa"/>
      <lastmod>2026-11-02T02:26:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-frikkie81-2/ssssswsa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-frikkie81-2/ssssswsa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-frikkie81-2/ssssswsa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-frikkie81-2/ssssswsa"/>
      <lastmod>2026-11-02T02:26:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-derivatives-of-inverse-functions/ssssswsc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-derivatives-of-inverse-functions/ssssswsc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-derivatives-of-inverse-functions/ssssswsc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-derivatives-of-inverse-functions/ssssswsc"/>
      <lastmod>2026-11-01T21:37:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-derivatives-of-inverse-functions/ssssswsc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-derivatives-of-inverse-functions/ssssswsc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-derivatives-of-inverse-functions/ssssswsc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-derivatives-of-inverse-functions/ssssswsc"/>
      <lastmod>2026-11-01T21:37:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sequences-as-functions-example-3/ssssswsr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sequences-as-functions-example-3/ssssswsr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sequences-as-functions-example-3/ssssswsr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sequences-as-functions-example-3/ssssswsr"/>
      <lastmod>2026-11-01T21:32:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sequences-as-functions-example-3/ssssswsr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sequences-as-functions-example-3/ssssswsr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sequences-as-functions-example-3/ssssswsr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sequences-as-functions-example-3/ssssswsr"/>
      <lastmod>2026-11-01T21:32:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-water-areas-proof/ssssswsh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-water-areas-proof/ssssswsh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-water-areas-proof/ssssswsh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-water-areas-proof/ssssswsh"/>
      <lastmod>2026-11-01T21:55:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-water-areas-proof/ssssswsh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-water-areas-proof/ssssswsh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-water-areas-proof/ssssswsh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-water-areas-proof/ssssswsh"/>
      <lastmod>2026-11-01T21:55:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphs-describing-motion-task/ssssswst</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphs-describing-motion-task/ssssswst"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphs-describing-motion-task/ssssswst"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphs-describing-motion-task/ssssswst"/>
      <lastmod>2026-11-02T16:58:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphs-describing-motion-task/ssssswst</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphs-describing-motion-task/ssssswst"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphs-describing-motion-task/ssssswst"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphs-describing-motion-task/ssssswst"/>
      <lastmod>2026-11-02T16:58:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/types-of-angles-exercises/ssssswsx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/types-of-angles-exercises/ssssswsx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/types-of-angles-exercises/ssssswsx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/types-of-angles-exercises/ssssswsx"/>
      <lastmod>2026-11-02T17:14:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/types-of-angles-exercises/ssssswsx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/types-of-angles-exercises/ssssswsx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/types-of-angles-exercises/ssssswsx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/types-of-angles-exercises/ssssswsx"/>
      <lastmod>2026-11-02T17:14:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-illustration-of-30-degrees-trig-values/ssssswsi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-30-degrees-trig-values/ssssswsi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-30-degrees-trig-values/ssssswsi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-30-degrees-trig-values/ssssswsi"/>
      <lastmod>2026-11-02T15:51:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-illustration-of-30-degrees-trig-values/ssssswsi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-30-degrees-trig-values/ssssswsi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-30-degrees-trig-values/ssssswsi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-30-degrees-trig-values/ssssswsi"/>
      <lastmod>2026-11-02T15:51:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parametric-curves-and-tangents/ssssswso</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-curves-and-tangents/ssssswso"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-curves-and-tangents/ssssswso"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-curves-and-tangents/ssssswso"/>
      <lastmod>2026-11-02T17:04:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parametric-curves-and-tangents/ssssswso</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-curves-and-tangents/ssssswso"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-curves-and-tangents/ssssswso"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-curves-and-tangents/ssssswso"/>
      <lastmod>2026-11-02T17:04:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-demo/sssssw7s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-demo/sssssw7s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-demo/sssssw7s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-demo/sssssw7s"/>
      <lastmod>2026-11-02T02:54:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-demo/sssssw7s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-demo/sssssw7s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-demo/sssssw7s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-demo/sssssw7s"/>
      <lastmod>2026-11-02T02:54:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-unwrapping-and-intersection-demo/sssssw77</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-unwrapping-and-intersection-demo/sssssw77"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-unwrapping-and-intersection-demo/sssssw77"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-unwrapping-and-intersection-demo/sssssw77"/>
      <lastmod>2026-11-02T18:34:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-unwrapping-and-intersection-demo/sssssw77</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-unwrapping-and-intersection-demo/sssssw77"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-unwrapping-and-intersection-demo/sssssw77"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-unwrapping-and-intersection-demo/sssssw77"/>
      <lastmod>2026-11-02T18:34:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fibonacci-numbers-and-the-fibonacci-spiral/sssssw7n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fibonacci-numbers-and-the-fibonacci-spiral/sssssw7n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fibonacci-numbers-and-the-fibonacci-spiral/sssssw7n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fibonacci-numbers-and-the-fibonacci-spiral/sssssw7n"/>
      <lastmod>2026-11-01T22:04:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fibonacci-numbers-and-the-fibonacci-spiral/sssssw7n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fibonacci-numbers-and-the-fibonacci-spiral/sssssw7n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fibonacci-numbers-and-the-fibonacci-spiral/sssssw7n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fibonacci-numbers-and-the-fibonacci-spiral/sssssw7n"/>
      <lastmod>2026-11-01T22:04:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/super-symmetry-in-mathematics/sssssw72</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/super-symmetry-in-mathematics/sssssw72"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/super-symmetry-in-mathematics/sssssw72"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/super-symmetry-in-mathematics/sssssw72"/>
      <lastmod>2026-11-01T22:12:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/super-symmetry-in-mathematics/sssssw72</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/super-symmetry-in-mathematics/sssssw72"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/super-symmetry-in-mathematics/sssssw72"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/super-symmetry-in-mathematics/sssssw72"/>
      <lastmod>2026-11-01T22:12:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-dimensions/sssssw7k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-dimensions/sssssw7k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-dimensions/sssssw7k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-dimensions/sssssw7k"/>
      <lastmod>2026-11-02T16:45:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-dimensions/sssssw7k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-dimensions/sssssw7k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-dimensions/sssssw7k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-dimensions/sssssw7k"/>
      <lastmod>2026-11-02T16:45:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-function/sssssw7z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-function/sssssw7z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-function/sssssw7z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-function/sssssw7z"/>
      <lastmod>2026-11-02T16:55:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-function/sssssw7z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-function/sssssw7z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-function/sssssw7z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-function/sssssw7z"/>
      <lastmod>2026-11-02T16:55:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/same-root-sine-curves/sssssw70</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/same-root-sine-curves/sssssw70"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/same-root-sine-curves/sssssw70"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/same-root-sine-curves/sssssw70"/>
      <lastmod>2026-11-02T00:14:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/same-root-sine-curves/sssssw70</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/same-root-sine-curves/sssssw70"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/same-root-sine-curves/sssssw70"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/same-root-sine-curves/sssssw70"/>
      <lastmod>2026-11-02T00:14:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/real-exponent-transformation-demo/sssssw7d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/real-exponent-transformation-demo/sssssw7d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/real-exponent-transformation-demo/sssssw7d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/real-exponent-transformation-demo/sssssw7d"/>
      <lastmod>2026-11-02T12:43:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/real-exponent-transformation-demo/sssssw7d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/real-exponent-transformation-demo/sssssw7d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/real-exponent-transformation-demo/sssssw7d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/real-exponent-transformation-demo/sssssw7d"/>
      <lastmod>2026-11-02T12:43:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/horizontal-translation-of-a-graph/sssssw7f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-translation-of-a-graph/sssssw7f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-translation-of-a-graph/sssssw7f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-translation-of-a-graph/sssssw7f"/>
      <lastmod>2026-11-02T08:38:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/horizontal-translation-of-a-graph/sssssw7f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-translation-of-a-graph/sssssw7f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-translation-of-a-graph/sssssw7f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-translation-of-a-graph/sssssw7f"/>
      <lastmod>2026-11-02T08:38:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-with-sliders/sssssw78</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-with-sliders/sssssw78"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-with-sliders/sssssw78"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-with-sliders/sssssw78"/>
      <lastmod>2026-11-01T19:02:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-with-sliders/sssssw78</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-with-sliders/sssssw78"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-with-sliders/sssssw78"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-with-sliders/sssssw78"/>
      <lastmod>2026-11-01T19:02:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/part-3-rhombus-dynamic-exploration-of-sides-diagonals-perimeter-and-angles/sssssw7u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/part-3-rhombus-dynamic-exploration-of-sides-diagonals-perimeter-and-angles/sssssw7u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/part-3-rhombus-dynamic-exploration-of-sides-diagonals-perimeter-and-angles/sssssw7u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/part-3-rhombus-dynamic-exploration-of-sides-diagonals-perimeter-and-angles/sssssw7u"/>
      <lastmod>2026-11-02T15:53:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/part-3-rhombus-dynamic-exploration-of-sides-diagonals-perimeter-and-angles/sssssw7u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/part-3-rhombus-dynamic-exploration-of-sides-diagonals-perimeter-and-angles/sssssw7u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/part-3-rhombus-dynamic-exploration-of-sides-diagonals-perimeter-and-angles/sssssw7u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/part-3-rhombus-dynamic-exploration-of-sides-diagonals-perimeter-and-angles/sssssw7u"/>
      <lastmod>2026-11-02T15:53:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/power-law-relationship/sssssw75</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/power-law-relationship/sssssw75"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/power-law-relationship/sssssw75"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/power-law-relationship/sssssw75"/>
      <lastmod>2026-11-01T19:18:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/power-law-relationship/sssssw75</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/power-law-relationship/sssssw75"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/power-law-relationship/sssssw75"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/power-law-relationship/sssssw75"/>
      <lastmod>2026-11-01T19:18:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/root-mean-squared-current/sssssw7b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/root-mean-squared-current/sssssw7b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/root-mean-squared-current/sssssw7b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/root-mean-squared-current/sssssw7b"/>
      <lastmod>2026-11-02T00:51:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/root-mean-squared-current/sssssw7b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/root-mean-squared-current/sssssw7b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/root-mean-squared-current/sssssw7b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/root-mean-squared-current/sssssw7b"/>
      <lastmod>2026-11-02T00:51:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-speakmath/sssssw73</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-speakmath/sssssw73"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-speakmath/sssssw73"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-speakmath/sssssw73"/>
      <lastmod>2026-11-01T20:39:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-speakmath/sssssw73</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-speakmath/sssssw73"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-speakmath/sssssw73"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-speakmath/sssssw73"/>
      <lastmod>2026-11-01T20:39:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-transformational-geometry-by-dan-dale/sssssw7q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-transformational-geometry-by-dan-dale/sssssw7q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-transformational-geometry-by-dan-dale/sssssw7q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-transformational-geometry-by-dan-dale/sssssw7q"/>
      <lastmod>2026-11-01T23:22:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-transformational-geometry-by-dan-dale/sssssw7q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-transformational-geometry-by-dan-dale/sssssw7q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-transformational-geometry-by-dan-dale/sssssw7q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-transformational-geometry-by-dan-dale/sssssw7q"/>
      <lastmod>2026-11-01T23:22:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-trig-ratios/sssssw71</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-trig-ratios/sssssw71"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-trig-ratios/sssssw71"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-trig-ratios/sssssw71"/>
      <lastmod>2026-11-02T03:20:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-trig-ratios/sssssw71</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-trig-ratios/sssssw71"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-trig-ratios/sssssw71"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-trig-ratios/sssssw71"/>
      <lastmod>2026-11-02T03:20:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a-quarter-of-a-cube/sssssw7m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-quarter-of-a-cube/sssssw7m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-quarter-of-a-cube/sssssw7m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-quarter-of-a-cube/sssssw7m"/>
      <lastmod>2026-11-02T02:51:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a-quarter-of-a-cube/sssssw7m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-quarter-of-a-cube/sssssw7m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-quarter-of-a-cube/sssssw7m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-quarter-of-a-cube/sssssw7m"/>
      <lastmod>2026-11-02T02:51:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/truncated-cuboctahedron-vertex-average-distance-vs-truncation-parameter/sssssw7j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-cuboctahedron-vertex-average-distance-vs-truncation-parameter/sssssw7j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-cuboctahedron-vertex-average-distance-vs-truncation-parameter/sssssw7j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-cuboctahedron-vertex-average-distance-vs-truncation-parameter/sssssw7j"/>
      <lastmod>2026-11-01T21:04:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/truncated-cuboctahedron-vertex-average-distance-vs-truncation-parameter/sssssw7j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-cuboctahedron-vertex-average-distance-vs-truncation-parameter/sssssw7j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-cuboctahedron-vertex-average-distance-vs-truncation-parameter/sssssw7j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-cuboctahedron-vertex-average-distance-vs-truncation-parameter/sssssw7j"/>
      <lastmod>2026-11-01T21:04:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/subtraction-number-line-fixed/sssssw7p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtraction-number-line-fixed/sssssw7p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtraction-number-line-fixed/sssssw7p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtraction-number-line-fixed/sssssw7p"/>
      <lastmod>2026-11-02T02:54:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/subtraction-number-line-fixed/sssssw7p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtraction-number-line-fixed/sssssw7p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtraction-number-line-fixed/sssssw7p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtraction-number-line-fixed/sssssw7p"/>
      <lastmod>2026-11-02T02:54:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-action-interactive-geometry-exploration/sssssw7w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-action-interactive-geometry-exploration/sssssw7w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-action-interactive-geometry-exploration/sssssw7w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-action-interactive-geometry-exploration/sssssw7w"/>
      <lastmod>2026-11-02T02:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-action-interactive-geometry-exploration/sssssw7w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-action-interactive-geometry-exploration/sssssw7w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-action-interactive-geometry-exploration/sssssw7w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-action-interactive-geometry-exploration/sssssw7w"/>
      <lastmod>2026-11-02T02:58:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simple-angle-review/sssssw76</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-angle-review/sssssw76"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-angle-review/sssssw76"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-angle-review/sssssw76"/>
      <lastmod>2026-11-01T19:00:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simple-angle-review/sssssw76</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-angle-review/sssssw76"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-angle-review/sssssw76"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-angle-review/sssssw76"/>
      <lastmod>2026-11-01T19:00:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sketch-the-derivative-function/sssssw7g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sketch-the-derivative-function/sssssw7g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sketch-the-derivative-function/sssssw7g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sketch-the-derivative-function/sssssw7g"/>
      <lastmod>2026-11-01T21:38:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sketch-the-derivative-function/sssssw7g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sketch-the-derivative-function/sssssw7g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sketch-the-derivative-function/sssssw7g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sketch-the-derivative-function/sssssw7g"/>
      <lastmod>2026-11-01T21:38:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inequalities-and-triangle-demo/sssssw79</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inequalities-and-triangle-demo/sssssw79"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inequalities-and-triangle-demo/sssssw79"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inequalities-and-triangle-demo/sssssw79"/>
      <lastmod>2026-11-01T19:24:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inequalities-and-triangle-demo/sssssw79</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inequalities-and-triangle-demo/sssssw79"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inequalities-and-triangle-demo/sssssw79"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inequalities-and-triangle-demo/sssssw79"/>
      <lastmod>2026-11-01T19:24:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arc-length-and-area-of-a-sector/sssssw7e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arc-length-and-area-of-a-sector/sssssw7e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arc-length-and-area-of-a-sector/sssssw7e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arc-length-and-area-of-a-sector/sssssw7e"/>
      <lastmod>2026-11-01T21:35:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arc-length-and-area-of-a-sector/sssssw7e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arc-length-and-area-of-a-sector/sssssw7e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arc-length-and-area-of-a-sector/sssssw7e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arc-length-and-area-of-a-sector/sssssw7e"/>
      <lastmod>2026-11-01T21:35:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/radians-in-unit-circle-by-ben-kirk/sssssw7v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/radians-in-unit-circle-by-ben-kirk/sssssw7v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/radians-in-unit-circle-by-ben-kirk/sssssw7v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/radians-in-unit-circle-by-ben-kirk/sssssw7v"/>
      <lastmod>2026-11-02T15:02:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/radians-in-unit-circle-by-ben-kirk/sssssw7v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/radians-in-unit-circle-by-ben-kirk/sssssw7v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/radians-in-unit-circle-by-ben-kirk/sssssw7v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/radians-in-unit-circle-by-ben-kirk/sssssw7v"/>
      <lastmod>2026-11-02T15:02:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-demonstration-by-tricia-krumbach/sssssw74</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-demonstration-by-tricia-krumbach/sssssw74"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-demonstration-by-tricia-krumbach/sssssw74"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-demonstration-by-tricia-krumbach/sssssw74"/>
      <lastmod>2026-11-02T15:19:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-demonstration-by-tricia-krumbach/sssssw74</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-demonstration-by-tricia-krumbach/sssssw74"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-demonstration-by-tricia-krumbach/sssssw74"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-demonstration-by-tricia-krumbach/sssssw74"/>
      <lastmod>2026-11-02T15:19:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-inequality-and-ellipse/sssssw7l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-inequality-and-ellipse/sssssw7l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-inequality-and-ellipse/sssssw7l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-inequality-and-ellipse/sssssw7l"/>
      <lastmod>2026-11-02T15:52:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-inequality-and-ellipse/sssssw7l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-inequality-and-ellipse/sssssw7l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-inequality-and-ellipse/sssssw7l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-inequality-and-ellipse/sssssw7l"/>
      <lastmod>2026-11-02T15:52:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygonal-prism-dissection/sssssw7y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygonal-prism-dissection/sssssw7y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygonal-prism-dissection/sssssw7y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygonal-prism-dissection/sssssw7y"/>
      <lastmod>2026-11-02T17:03:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygonal-prism-dissection/sssssw7y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygonal-prism-dissection/sssssw7y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygonal-prism-dissection/sssssw7y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygonal-prism-dissection/sssssw7y"/>
      <lastmod>2026-11-02T17:03:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoidal-sum-demonstration/sssssw7a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoidal-sum-demonstration/sssssw7a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoidal-sum-demonstration/sssssw7a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoidal-sum-demonstration/sssssw7a"/>
      <lastmod>2026-11-02T17:53:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoidal-sum-demonstration/sssssw7a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoidal-sum-demonstration/sssssw7a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoidal-sum-demonstration/sssssw7a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoidal-sum-demonstration/sssssw7a"/>
      <lastmod>2026-11-02T17:53:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/determining-area-vs-perimeter-with-block-shapes/sssssw7c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/determining-area-vs-perimeter-with-block-shapes/sssssw7c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/determining-area-vs-perimeter-with-block-shapes/sssssw7c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/determining-area-vs-perimeter-with-block-shapes/sssssw7c"/>
      <lastmod>2026-11-02T00:39:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/determining-area-vs-perimeter-with-block-shapes/sssssw7c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/determining-area-vs-perimeter-with-block-shapes/sssssw7c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/determining-area-vs-perimeter-with-block-shapes/sssssw7c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/determining-area-vs-perimeter-with-block-shapes/sssssw7c"/>
      <lastmod>2026-11-02T00:39:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractal-spirograph/sssssw7r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractal-spirograph/sssssw7r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractal-spirograph/sssssw7r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractal-spirograph/sssssw7r"/>
      <lastmod>2026-11-01T20:51:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractal-spirograph/sssssw7r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractal-spirograph/sssssw7r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractal-spirograph/sssssw7r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractal-spirograph/sssssw7r"/>
      <lastmod>2026-11-01T20:51:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/alternate-exterior-angles/sssssw7h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-exterior-angles/sssssw7h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-exterior-angles/sssssw7h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-exterior-angles/sssssw7h"/>
      <lastmod>2026-11-02T16:44:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/alternate-exterior-angles/sssssw7h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/alternate-exterior-angles/sssssw7h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/alternate-exterior-angles/sssssw7h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/alternate-exterior-angles/sssssw7h"/>
      <lastmod>2026-11-02T16:44:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-properties-by-simon/sssssw7t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-properties-by-simon/sssssw7t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-properties-by-simon/sssssw7t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-properties-by-simon/sssssw7t"/>
      <lastmod>2026-11-02T13:35:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-properties-by-simon/sssssw7t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-properties-by-simon/sssssw7t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-properties-by-simon/sssssw7t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-properties-by-simon/sssssw7t"/>
      <lastmod>2026-11-02T13:35:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/optimization-and-special-points/sssssw7x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/optimization-and-special-points/sssssw7x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/optimization-and-special-points/sssssw7x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/optimization-and-special-points/sssssw7x"/>
      <lastmod>2026-11-02T02:10:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/optimization-and-special-points/sssssw7x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/optimization-and-special-points/sssssw7x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/optimization-and-special-points/sssssw7x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/optimization-and-special-points/sssssw7x"/>
      <lastmod>2026-11-02T02:10:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-and-point-symmetry/sssssw7i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-and-point-symmetry/sssssw7i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-and-point-symmetry/sssssw7i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-and-point-symmetry/sssssw7i"/>
      <lastmod>2026-11-02T00:51:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-and-point-symmetry/sssssw7i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-and-point-symmetry/sssssw7i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-and-point-symmetry/sssssw7i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-and-point-symmetry/sssssw7i"/>
      <lastmod>2026-11-02T00:51:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circular-motion-and-piecewise-functions-advanced-trigonometry/sssssw7o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circular-motion-and-piecewise-functions-advanced-trigonometry/sssssw7o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circular-motion-and-piecewise-functions-advanced-trigonometry/sssssw7o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circular-motion-and-piecewise-functions-advanced-trigonometry/sssssw7o"/>
      <lastmod>2026-11-01T23:10:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circular-motion-and-piecewise-functions-advanced-trigonometry/sssssw7o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circular-motion-and-piecewise-functions-advanced-trigonometry/sssssw7o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circular-motion-and-piecewise-functions-advanced-trigonometry/sssssw7o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circular-motion-and-piecewise-functions-advanced-trigonometry/sssssw7o"/>
      <lastmod>2026-11-01T23:10:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-on-sphere/ssssswns</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-on-sphere/ssssswns"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-on-sphere/ssssswns"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-on-sphere/ssssswns"/>
      <lastmod>2026-11-02T18:41:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-on-sphere/ssssswns</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-on-sphere/ssssswns"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-on-sphere/ssssswns"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-on-sphere/ssssswns"/>
      <lastmod>2026-11-02T18:41:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cross-section-of-various-solids-exploring-planar-sections-of-3d-shapes/ssssswn7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-section-of-various-solids-exploring-planar-sections-of-3d-shapes/ssssswn7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-section-of-various-solids-exploring-planar-sections-of-3d-shapes/ssssswn7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-section-of-various-solids-exploring-planar-sections-of-3d-shapes/ssssswn7"/>
      <lastmod>2026-11-02T02:26:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cross-section-of-various-solids-exploring-planar-sections-of-3d-shapes/ssssswn7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-section-of-various-solids-exploring-planar-sections-of-3d-shapes/ssssswn7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-section-of-various-solids-exploring-planar-sections-of-3d-shapes/ssssswn7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-section-of-various-solids-exploring-planar-sections-of-3d-shapes/ssssswn7"/>
      <lastmod>2026-11-02T02:26:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/calculating-surface-area-of-rectangular-prism/ssssswnn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-surface-area-of-rectangular-prism/ssssswnn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-surface-area-of-rectangular-prism/ssssswnn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-surface-area-of-rectangular-prism/ssssswnn"/>
      <lastmod>2026-11-02T12:40:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/calculating-surface-area-of-rectangular-prism/ssssswnn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-surface-area-of-rectangular-prism/ssssswnn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-surface-area-of-rectangular-prism/ssssswnn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-surface-area-of-rectangular-prism/ssssswnn"/>
      <lastmod>2026-11-02T12:40:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bouncing-ball-model/ssssswn2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bouncing-ball-model/ssssswn2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bouncing-ball-model/ssssswn2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bouncing-ball-model/ssssswn2"/>
      <lastmod>2026-11-02T18:11:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bouncing-ball-model/ssssswn2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bouncing-ball-model/ssssswn2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bouncing-ball-model/ssssswn2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bouncing-ball-model/ssssswn2"/>
      <lastmod>2026-11-02T18:11:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/painting-with-a-bouncing-ball-dynamic-coordinate-art/ssssswnk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/painting-with-a-bouncing-ball-dynamic-coordinate-art/ssssswnk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/painting-with-a-bouncing-ball-dynamic-coordinate-art/ssssswnk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/painting-with-a-bouncing-ball-dynamic-coordinate-art/ssssswnk"/>
      <lastmod>2026-11-02T18:09:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/painting-with-a-bouncing-ball-dynamic-coordinate-art/ssssswnk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/painting-with-a-bouncing-ball-dynamic-coordinate-art/ssssswnk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/painting-with-a-bouncing-ball-dynamic-coordinate-art/ssssswnk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/painting-with-a-bouncing-ball-dynamic-coordinate-art/ssssswnk"/>
      <lastmod>2026-11-02T18:09:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-between-a-line-segment-and-a-plane-solid-geometry-demo/ssssswnz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-a-line-segment-and-a-plane-solid-geometry-demo/ssssswnz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-a-line-segment-and-a-plane-solid-geometry-demo/ssssswnz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-a-line-segment-and-a-plane-solid-geometry-demo/ssssswnz"/>
      <lastmod>2026-11-02T09:59:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-between-a-line-segment-and-a-plane-solid-geometry-demo/ssssswnz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-a-line-segment-and-a-plane-solid-geometry-demo/ssssswnz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-a-line-segment-and-a-plane-solid-geometry-demo/ssssswnz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-a-line-segment-and-a-plane-solid-geometry-demo/ssssswnz"/>
      <lastmod>2026-11-02T09:59:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-between-two-curves-by-ravinder-kumar/ssssswn0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-between-two-curves-by-ravinder-kumar/ssssswn0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-between-two-curves-by-ravinder-kumar/ssssswn0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-between-two-curves-by-ravinder-kumar/ssssswn0"/>
      <lastmod>2026-11-02T18:20:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-between-two-curves-by-ravinder-kumar/ssssswn0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-between-two-curves-by-ravinder-kumar/ssssswn0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-between-two-curves-by-ravinder-kumar/ssssswn0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-between-two-curves-by-ravinder-kumar/ssssswn0"/>
      <lastmod>2026-11-02T18:20:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lebesgue-3d-curves-visualization/ssssswnd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lebesgue-3d-curves-visualization/ssssswnd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lebesgue-3d-curves-visualization/ssssswnd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lebesgue-3d-curves-visualization/ssssswnd"/>
      <lastmod>2026-11-02T02:31:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lebesgue-3d-curves-visualization/ssssswnd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lebesgue-3d-curves-visualization/ssssswnd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lebesgue-3d-curves-visualization/ssssswnd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lebesgue-3d-curves-visualization/ssssswnd"/>
      <lastmod>2026-11-02T02:31:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-station-exploring-rotation-transformations-and-center-effects/ssssswnf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-station-exploring-rotation-transformations-and-center-effects/ssssswnf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-station-exploring-rotation-transformations-and-center-effects/ssssswnf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-station-exploring-rotation-transformations-and-center-effects/ssssswnf"/>
      <lastmod>2026-11-01T19:18:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-station-exploring-rotation-transformations-and-center-effects/ssssswnf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-station-exploring-rotation-transformations-and-center-effects/ssssswnf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-station-exploring-rotation-transformations-and-center-effects/ssssswnf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-station-exploring-rotation-transformations-and-center-effects/ssssswnf"/>
      <lastmod>2026-11-01T19:18:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-quadrilateral/ssssswn8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-quadrilateral/ssssswn8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-quadrilateral/ssssswn8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-quadrilateral/ssssswn8"/>
      <lastmod>2026-11-02T16:39:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-quadrilateral/ssssswn8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-quadrilateral/ssssswn8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-quadrilateral/ssssswn8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-quadrilateral/ssssswn8"/>
      <lastmod>2026-11-02T16:39:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-7-8-6-practice-estimating-probabilities-using-simulation/ssssswnu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-8-6-practice-estimating-probabilities-using-simulation/ssssswnu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-8-6-practice-estimating-probabilities-using-simulation/ssssswnu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-8-6-practice-estimating-probabilities-using-simulation/ssssswnu"/>
      <lastmod>2026-11-02T10:35:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-7-8-6-practice-estimating-probabilities-using-simulation/ssssswnu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-8-6-practice-estimating-probabilities-using-simulation/ssssswnu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-8-6-practice-estimating-probabilities-using-simulation/ssssswnu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-8-6-practice-estimating-probabilities-using-simulation/ssssswnu"/>
      <lastmod>2026-11-02T10:35:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sampling-distribution-of-a-proportion-interactive-demo/ssssswn5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sampling-distribution-of-a-proportion-interactive-demo/ssssswn5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sampling-distribution-of-a-proportion-interactive-demo/ssssswn5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sampling-distribution-of-a-proportion-interactive-demo/ssssswn5"/>
      <lastmod>2026-11-01T21:37:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sampling-distribution-of-a-proportion-interactive-demo/ssssswn5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sampling-distribution-of-a-proportion-interactive-demo/ssssswn5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sampling-distribution-of-a-proportion-interactive-demo/ssssswn5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sampling-distribution-of-a-proportion-interactive-demo/ssssswn5"/>
      <lastmod>2026-11-01T21:37:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-properties/ssssswnb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-properties/ssssswnb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-properties/ssssswnb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-properties/ssssswnb"/>
      <lastmod>2026-11-02T09:39:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-properties/ssssswnb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-properties/ssssswnb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-properties/ssssswnb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-properties/ssssswnb"/>
      <lastmod>2026-11-02T09:39:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/double-torus-doppelreifen-dynamic-construction/ssssswn3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-torus-doppelreifen-dynamic-construction/ssssswn3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-torus-doppelreifen-dynamic-construction/ssssswn3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-torus-doppelreifen-dynamic-construction/ssssswn3"/>
      <lastmod>2026-11-02T18:31:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/double-torus-doppelreifen-dynamic-construction/ssssswn3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/double-torus-doppelreifen-dynamic-construction/ssssswn3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/double-torus-doppelreifen-dynamic-construction/ssssswn3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/double-torus-doppelreifen-dynamic-construction/ssssswn3"/>
      <lastmod>2026-11-02T18:31:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/determinants-practice/ssssswnq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/determinants-practice/ssssswnq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/determinants-practice/ssssswnq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/determinants-practice/ssssswnq"/>
      <lastmod>2026-11-01T21:13:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/determinants-practice/ssssswnq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/determinants-practice/ssssswnq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/determinants-practice/ssssswnq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/determinants-practice/ssssswnq"/>
      <lastmod>2026-11-01T21:13:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distributions/ssssswn1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distributions/ssssswn1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distributions/ssssswn1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distributions/ssssswn1"/>
      <lastmod>2026-11-02T02:53:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distributions/ssssswn1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distributions/ssssswn1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distributions/ssssswn1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distributions/ssssswn1"/>
      <lastmod>2026-11-02T02:53:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-division-by-amy-brodesky/ssssswnm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-division-by-amy-brodesky/ssssswnm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-division-by-amy-brodesky/ssssswnm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-division-by-amy-brodesky/ssssswnm"/>
      <lastmod>2026-11-02T17:57:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-division-by-amy-brodesky/ssssswnm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-division-by-amy-brodesky/ssssswnm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-division-by-amy-brodesky/ssssswnm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-division-by-amy-brodesky/ssssswnm"/>
      <lastmod>2026-11-02T17:57:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilations-and-reflections-investigation/ssssswnj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-and-reflections-investigation/ssssswnj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-and-reflections-investigation/ssssswnj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-and-reflections-investigation/ssssswnj"/>
      <lastmod>2026-11-02T18:37:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilations-and-reflections-investigation/ssssswnj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-and-reflections-investigation/ssssswnj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-and-reflections-investigation/ssssswnj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-and-reflections-investigation/ssssswnj"/>
      <lastmod>2026-11-02T18:37:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplication-of-imaginary-points/ssssswnp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-of-imaginary-points/ssssswnp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-of-imaginary-points/ssssswnp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-of-imaginary-points/ssssswnp"/>
      <lastmod>2026-11-02T00:57:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplication-of-imaginary-points/ssssswnp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-of-imaginary-points/ssssswnp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-of-imaginary-points/ssssswnp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-of-imaginary-points/ssssswnp"/>
      <lastmod>2026-11-02T00:57:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/waves-on-the-sphere/ssssswnw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/waves-on-the-sphere/ssssswnw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/waves-on-the-sphere/ssssswnw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/waves-on-the-sphere/ssssswnw"/>
      <lastmod>2026-11-02T18:04:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/waves-on-the-sphere/ssssswnw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/waves-on-the-sphere/ssssswnw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/waves-on-the-sphere/ssssswnw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/waves-on-the-sphere/ssssswnw"/>
      <lastmod>2026-11-02T18:04:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/division-visualization/ssssswn6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/division-visualization/ssssswn6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/division-visualization/ssssswn6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/division-visualization/ssssswn6"/>
      <lastmod>2026-11-02T03:05:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/division-visualization/ssssswn6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/division-visualization/ssssswn6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/division-visualization/ssssswn6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/division-visualization/ssssswn6"/>
      <lastmod>2026-11-02T03:05:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/taylor-series-expansion-demo/ssssswng</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/taylor-series-expansion-demo/ssssswng"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/taylor-series-expansion-demo/ssssswng"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/taylor-series-expansion-demo/ssssswng"/>
      <lastmod>2026-11-01T23:58:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/taylor-series-expansion-demo/ssssswng</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/taylor-series-expansion-demo/ssssswng"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/taylor-series-expansion-demo/ssssswng"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/taylor-series-expansion-demo/ssssswng"/>
      <lastmod>2026-11-01T23:58:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mediator-plane-and-conic-sections/ssssswn9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mediator-plane-and-conic-sections/ssssswn9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mediator-plane-and-conic-sections/ssssswn9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mediator-plane-and-conic-sections/ssssswn9"/>
      <lastmod>2026-11-01T20:52:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mediator-plane-and-conic-sections/ssssswn9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mediator-plane-and-conic-sections/ssssswn9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mediator-plane-and-conic-sections/ssssswn9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mediator-plane-and-conic-sections/ssssswn9"/>
      <lastmod>2026-11-01T20:52:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-cross-sections/ssssswne</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-cross-sections/ssssswne"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-cross-sections/ssssswne"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-cross-sections/ssssswne"/>
      <lastmod>2026-11-01T23:25:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-cross-sections/ssssswne</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-cross-sections/ssssswne"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-cross-sections/ssssswne"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-cross-sections/ssssswne"/>
      <lastmod>2026-11-01T23:25:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/holed-torus-construction/ssssswnv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/holed-torus-construction/ssssswnv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/holed-torus-construction/ssssswnv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/holed-torus-construction/ssssswnv"/>
      <lastmod>2026-11-01T23:32:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/holed-torus-construction/ssssswnv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/holed-torus-construction/ssssswnv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/holed-torus-construction/ssssswnv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/holed-torus-construction/ssssswnv"/>
      <lastmod>2026-11-01T23:32:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-distributions-mode-median-expected-value/ssssswn4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-distributions-mode-median-expected-value/ssssswn4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-distributions-mode-median-expected-value/ssssswn4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-distributions-mode-median-expected-value/ssssswn4"/>
      <lastmod>2026-11-01T20:44:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-distributions-mode-median-expected-value/ssssswn4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-distributions-mode-median-expected-value/ssssswn4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-distributions-mode-median-expected-value/ssssswn4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-distributions-mode-median-expected-value/ssssswn4"/>
      <lastmod>2026-11-01T20:44:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-polynomial-long-division-step-by-step/ssssswnl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-polynomial-long-division-step-by-step/ssssswnl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-polynomial-long-division-step-by-step/ssssswnl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-polynomial-long-division-step-by-step/ssssswnl"/>
      <lastmod>2026-11-02T02:35:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-polynomial-long-division-step-by-step/ssssswnl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-polynomial-long-division-step-by-step/ssssswnl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-polynomial-long-division-step-by-step/ssssswnl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-polynomial-long-division-step-by-step/ssssswnl"/>
      <lastmod>2026-11-02T02:35:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-linear-functions-in-2-d/ssssswny</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-linear-functions-in-2-d/ssssswny"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-linear-functions-in-2-d/ssssswny"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-linear-functions-in-2-d/ssssswny"/>
      <lastmod>2026-11-02T00:51:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-linear-functions-in-2-d/ssssswny</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-linear-functions-in-2-d/ssssswny"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-linear-functions-in-2-d/ssssswny"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-linear-functions-in-2-d/ssssswny"/>
      <lastmod>2026-11-02T00:51:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tessellation/ssssswna</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tessellation/ssssswna"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tessellation/ssssswna"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tessellation/ssssswna"/>
      <lastmod>2026-11-02T16:55:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tessellation/ssssswna</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tessellation/ssssswna"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tessellation/ssssswna"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tessellation/ssssswna"/>
      <lastmod>2026-11-02T16:55:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-exponential-and-logarithmic-functions/ssssswnc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-exponential-and-logarithmic-functions/ssssswnc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-exponential-and-logarithmic-functions/ssssswnc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-exponential-and-logarithmic-functions/ssssswnc"/>
      <lastmod>2026-11-01T19:12:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-exponential-and-logarithmic-functions/ssssswnc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-exponential-and-logarithmic-functions/ssssswnc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-exponential-and-logarithmic-functions/ssssswnc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-exponential-and-logarithmic-functions/ssssswnc"/>
      <lastmod>2026-11-01T19:12:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/line-segment-construction/ssssswnr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-segment-construction/ssssswnr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-segment-construction/ssssswnr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-segment-construction/ssssswnr"/>
      <lastmod>2026-11-02T09:12:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/line-segment-construction/ssssswnr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-segment-construction/ssssswnr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-segment-construction/ssssswnr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-segment-construction/ssssswnr"/>
      <lastmod>2026-11-02T09:12:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/celestial-sphere-3d-astronomical-geometry-and-coordinate-construction/ssssswnh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/celestial-sphere-3d-astronomical-geometry-and-coordinate-construction/ssssswnh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/celestial-sphere-3d-astronomical-geometry-and-coordinate-construction/ssssswnh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/celestial-sphere-3d-astronomical-geometry-and-coordinate-construction/ssssswnh"/>
      <lastmod>2026-11-01T19:25:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/celestial-sphere-3d-astronomical-geometry-and-coordinate-construction/ssssswnh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/celestial-sphere-3d-astronomical-geometry-and-coordinate-construction/ssssswnh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/celestial-sphere-3d-astronomical-geometry-and-coordinate-construction/ssssswnh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/celestial-sphere-3d-astronomical-geometry-and-coordinate-construction/ssssswnh"/>
      <lastmod>2026-11-01T19:25:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-distribution-with-normal-and-poisson-approximation-by-marzia-ruffinoni/ssssswnt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-with-normal-and-poisson-approximation-by-marzia-ruffinoni/ssssswnt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-with-normal-and-poisson-approximation-by-marzia-ruffinoni/ssssswnt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-with-normal-and-poisson-approximation-by-marzia-ruffinoni/ssssswnt"/>
      <lastmod>2026-11-02T14:58:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-distribution-with-normal-and-poisson-approximation-by-marzia-ruffinoni/ssssswnt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-with-normal-and-poisson-approximation-by-marzia-ruffinoni/ssssswnt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-with-normal-and-poisson-approximation-by-marzia-ruffinoni/ssssswnt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-with-normal-and-poisson-approximation-by-marzia-ruffinoni/ssssswnt"/>
      <lastmod>2026-11-02T14:58:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/functions-and-coordinates/ssssswnx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/functions-and-coordinates/ssssswnx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/functions-and-coordinates/ssssswnx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/functions-and-coordinates/ssssswnx"/>
      <lastmod>2026-11-01T23:25:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/functions-and-coordinates/ssssswnx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/functions-and-coordinates/ssssswnx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/functions-and-coordinates/ssssswnx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/functions-and-coordinates/ssssswnx"/>
      <lastmod>2026-11-01T23:25:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angles-formed-by-two-parallel-lines-cut-by-a-transversal/ssssswni</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-formed-by-two-parallel-lines-cut-by-a-transversal/ssssswni"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-formed-by-two-parallel-lines-cut-by-a-transversal/ssssswni"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-formed-by-two-parallel-lines-cut-by-a-transversal/ssssswni"/>
      <lastmod>2026-11-02T17:45:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angles-formed-by-two-parallel-lines-cut-by-a-transversal/ssssswni</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-formed-by-two-parallel-lines-cut-by-a-transversal/ssssswni"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-formed-by-two-parallel-lines-cut-by-a-transversal/ssssswni"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-formed-by-two-parallel-lines-cut-by-a-transversal/ssssswni"/>
      <lastmod>2026-11-02T17:45:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-a-plane-and-a-line/ssssswno</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-a-plane-and-a-line/ssssswno"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-a-plane-and-a-line/ssssswno"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-a-plane-and-a-line/ssssswno"/>
      <lastmod>2026-11-01T22:04:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-a-plane-and-a-line/ssssswno</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-a-plane-and-a-line/ssssswno"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-a-plane-and-a-line/ssssswno"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-a-plane-and-a-line/ssssswno"/>
      <lastmod>2026-11-01T22:04:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-quadratic-function-characteristics/sssssw2s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-quadratic-function-characteristics/sssssw2s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-quadratic-function-characteristics/sssssw2s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-quadratic-function-characteristics/sssssw2s"/>
      <lastmod>2026-11-01T23:38:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-quadratic-function-characteristics/sssssw2s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-quadratic-function-characteristics/sssssw2s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-quadratic-function-characteristics/sssssw2s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-quadratic-function-characteristics/sssssw2s"/>
      <lastmod>2026-11-01T23:38:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/histogram-vs-cumulative-frequency-curve/sssssw27</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-vs-cumulative-frequency-curve/sssssw27"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-vs-cumulative-frequency-curve/sssssw27"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-vs-cumulative-frequency-curve/sssssw27"/>
      <lastmod>2026-11-02T08:59:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/histogram-vs-cumulative-frequency-curve/sssssw27</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-vs-cumulative-frequency-curve/sssssw27"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-vs-cumulative-frequency-curve/sssssw27"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-vs-cumulative-frequency-curve/sssssw27"/>
      <lastmod>2026-11-02T08:59:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/step-by-step-parabola-sketch/sssssw2n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/step-by-step-parabola-sketch/sssssw2n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/step-by-step-parabola-sketch/sssssw2n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/step-by-step-parabola-sketch/sssssw2n"/>
      <lastmod>2026-11-02T12:00:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/step-by-step-parabola-sketch/sssssw2n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/step-by-step-parabola-sketch/sssssw2n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/step-by-step-parabola-sketch/sssssw2n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/step-by-step-parabola-sketch/sssssw2n"/>
      <lastmod>2026-11-02T12:00:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-task-3-dynamic-construction-and-incircle-exploration/sssssw22</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-task-3-dynamic-construction-and-incircle-exploration/sssssw22"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-task-3-dynamic-construction-and-incircle-exploration/sssssw22"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-task-3-dynamic-construction-and-incircle-exploration/sssssw22"/>
      <lastmod>2026-11-02T16:50:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-task-3-dynamic-construction-and-incircle-exploration/sssssw22</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-task-3-dynamic-construction-and-incircle-exploration/sssssw22"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-task-3-dynamic-construction-and-incircle-exploration/sssssw22"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-task-3-dynamic-construction-and-incircle-exploration/sssssw22"/>
      <lastmod>2026-11-02T16:50:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coming-home-to-other-locations/sssssw2k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coming-home-to-other-locations/sssssw2k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coming-home-to-other-locations/sssssw2k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coming-home-to-other-locations/sssssw2k"/>
      <lastmod>2026-11-02T03:10:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coming-home-to-other-locations/sssssw2k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coming-home-to-other-locations/sssssw2k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coming-home-to-other-locations/sssssw2k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coming-home-to-other-locations/sssssw2k"/>
      <lastmod>2026-11-02T03:10:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triple-product-rule-cube/sssssw2z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triple-product-rule-cube/sssssw2z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triple-product-rule-cube/sssssw2z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triple-product-rule-cube/sssssw2z"/>
      <lastmod>2026-11-02T00:27:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triple-product-rule-cube/sssssw2z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triple-product-rule-cube/sssssw2z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triple-product-rule-cube/sssssw2z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triple-product-rule-cube/sssssw2z"/>
      <lastmod>2026-11-02T00:27:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/say-it-with-decimals-geogebra-example/sssssw20</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/say-it-with-decimals-geogebra-example/sssssw20"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/say-it-with-decimals-geogebra-example/sssssw20"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/say-it-with-decimals-geogebra-example/sssssw20"/>
      <lastmod>2026-11-02T10:37:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/say-it-with-decimals-geogebra-example/sssssw20</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/say-it-with-decimals-geogebra-example/sssssw20"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/say-it-with-decimals-geogebra-example/sssssw20"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/say-it-with-decimals-geogebra-example/sssssw20"/>
      <lastmod>2026-11-02T10:37:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hundreds-grid-bottom-up/sssssw2d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hundreds-grid-bottom-up/sssssw2d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hundreds-grid-bottom-up/sssssw2d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hundreds-grid-bottom-up/sssssw2d"/>
      <lastmod>2026-11-01T19:32:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hundreds-grid-bottom-up/sssssw2d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hundreds-grid-bottom-up/sssssw2d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hundreds-grid-bottom-up/sssssw2d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hundreds-grid-bottom-up/sssssw2d"/>
      <lastmod>2026-11-01T19:32:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-rotation-geometric-construction-example/sssssw2f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-rotation-geometric-construction-example/sssssw2f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-rotation-geometric-construction-example/sssssw2f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-rotation-geometric-construction-example/sssssw2f"/>
      <lastmod>2026-11-02T00:42:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-rotation-geometric-construction-example/sssssw2f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-rotation-geometric-construction-example/sssssw2f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-rotation-geometric-construction-example/sssssw2f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-rotation-geometric-construction-example/sssssw2f"/>
      <lastmod>2026-11-02T00:42:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-a-cube-interactive-visualization-sssssihy/sssssw28</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cube-interactive-visualization-sssssihy/sssssw28"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-cube-interactive-visualization-sssssihy/sssssw28"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cube-interactive-visualization-sssssihy/sssssw28"/>
      <lastmod>2026-11-02T18:34:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-a-cube-interactive-visualization-sssssihy/sssssw28</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cube-interactive-visualization-sssssihy/sssssw28"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-cube-interactive-visualization-sssssihy/sssssw28"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cube-interactive-visualization-sssssihy/sssssw28"/>
      <lastmod>2026-11-02T18:34:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-julie-arakelian/sssssw2u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-julie-arakelian/sssssw2u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-by-julie-arakelian/sssssw2u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-julie-arakelian/sssssw2u"/>
      <lastmod>2026-11-02T18:35:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-by-julie-arakelian/sssssw2u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-julie-arakelian/sssssw2u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-construction-by-julie-arakelian/sssssw2u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-construction-by-julie-arakelian/sssssw2u"/>
      <lastmod>2026-11-02T18:35:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-with-concyclic-points-and-angle-bisector/sssssw25</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-with-concyclic-points-and-angle-bisector/sssssw25"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-with-concyclic-points-and-angle-bisector/sssssw25"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-with-concyclic-points-and-angle-bisector/sssssw25"/>
      <lastmod>2026-11-01T21:37:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-with-concyclic-points-and-angle-bisector/sssssw25</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-with-concyclic-points-and-angle-bisector/sssssw25"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-with-concyclic-points-and-angle-bisector/sssssw25"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-with-concyclic-points-and-angle-bisector/sssssw25"/>
      <lastmod>2026-11-01T21:37:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygon-dilation-transformation-scaling-equilateral-triangles-and-trapezoids/sssssw2b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-dilation-transformation-scaling-equilateral-triangles-and-trapezoids/sssssw2b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-dilation-transformation-scaling-equilateral-triangles-and-trapezoids/sssssw2b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-dilation-transformation-scaling-equilateral-triangles-and-trapezoids/sssssw2b"/>
      <lastmod>2026-11-02T00:19:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygon-dilation-transformation-scaling-equilateral-triangles-and-trapezoids/sssssw2b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-dilation-transformation-scaling-equilateral-triangles-and-trapezoids/sssssw2b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-dilation-transformation-scaling-equilateral-triangles-and-trapezoids/sssssw2b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-dilation-transformation-scaling-equilateral-triangles-and-trapezoids/sssssw2b"/>
      <lastmod>2026-11-02T00:19:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-surface-area/sssssw23</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-surface-area/sssssw23"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-surface-area/sssssw23"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-surface-area/sssssw23"/>
      <lastmod>2026-11-02T15:05:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-surface-area/sssssw23</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-surface-area/sssssw23"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-surface-area/sssssw23"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-surface-area/sssssw23"/>
      <lastmod>2026-11-02T15:05:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drawing-loci-of-the-form-arg-z-a/sssssw2q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-loci-of-the-form-arg-z-a/sssssw2q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-loci-of-the-form-arg-z-a/sssssw2q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-loci-of-the-form-arg-z-a/sssssw2q"/>
      <lastmod>2026-11-01T20:18:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drawing-loci-of-the-form-arg-z-a/sssssw2q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-loci-of-the-form-arg-z-a/sssssw2q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-loci-of-the-form-arg-z-a/sssssw2q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-loci-of-the-form-arg-z-a/sssssw2q"/>
      <lastmod>2026-11-01T20:18:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/domain-range-swap-quick-graphical-exploration/sssssw21</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/domain-range-swap-quick-graphical-exploration/sssssw21"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/domain-range-swap-quick-graphical-exploration/sssssw21"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/domain-range-swap-quick-graphical-exploration/sssssw21"/>
      <lastmod>2026-11-01T21:31:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/domain-range-swap-quick-graphical-exploration/sssssw21</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/domain-range-swap-quick-graphical-exploration/sssssw21"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/domain-range-swap-quick-graphical-exploration/sssssw21"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/domain-range-swap-quick-graphical-exploration/sssssw21"/>
      <lastmod>2026-11-01T21:31:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-by-malin-christersson/sssssw2m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-by-malin-christersson/sssssw2m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-by-malin-christersson/sssssw2m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-by-malin-christersson/sssssw2m"/>
      <lastmod>2026-11-01T23:37:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-by-malin-christersson/sssssw2m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-by-malin-christersson/sssssw2m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-by-malin-christersson/sssssw2m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-by-malin-christersson/sssssw2m"/>
      <lastmod>2026-11-01T23:37:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cross-sections-of-prisms-dynamic-exploration-and-construction/sssssw2j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-sections-of-prisms-dynamic-exploration-and-construction/sssssw2j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-sections-of-prisms-dynamic-exploration-and-construction/sssssw2j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-sections-of-prisms-dynamic-exploration-and-construction/sssssw2j"/>
      <lastmod>2026-11-02T18:53:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cross-sections-of-prisms-dynamic-exploration-and-construction/sssssw2j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-sections-of-prisms-dynamic-exploration-and-construction/sssssw2j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-sections-of-prisms-dynamic-exploration-and-construction/sssssw2j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-sections-of-prisms-dynamic-exploration-and-construction/sssssw2j"/>
      <lastmod>2026-11-02T18:53:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/investigation-of-exponential-function-graphs/sssssw2p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigation-of-exponential-function-graphs/sssssw2p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigation-of-exponential-function-graphs/sssssw2p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigation-of-exponential-function-graphs/sssssw2p"/>
      <lastmod>2026-11-01T21:36:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/investigation-of-exponential-function-graphs/sssssw2p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigation-of-exponential-function-graphs/sssssw2p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigation-of-exponential-function-graphs/sssssw2p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigation-of-exponential-function-graphs/sssssw2p"/>
      <lastmod>2026-11-01T21:36:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/concentric-icosahedron-and-sphere-construction/sssssw2w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/concentric-icosahedron-and-sphere-construction/sssssw2w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/concentric-icosahedron-and-sphere-construction/sssssw2w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/concentric-icosahedron-and-sphere-construction/sssssw2w"/>
      <lastmod>2026-11-01T22:10:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/concentric-icosahedron-and-sphere-construction/sssssw2w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/concentric-icosahedron-and-sphere-construction/sssssw2w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/concentric-icosahedron-and-sphere-construction/sssssw2w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/concentric-icosahedron-and-sphere-construction/sssssw2w"/>
      <lastmod>2026-11-01T22:10:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sum-of-first-n-natural-numbers-by-ng-yew-hong/sssssw26</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-first-n-natural-numbers-by-ng-yew-hong/sssssw26"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-first-n-natural-numbers-by-ng-yew-hong/sssssw26"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-first-n-natural-numbers-by-ng-yew-hong/sssssw26"/>
      <lastmod>2026-11-02T18:59:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sum-of-first-n-natural-numbers-by-ng-yew-hong/sssssw26</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-first-n-natural-numbers-by-ng-yew-hong/sssssw26"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-first-n-natural-numbers-by-ng-yew-hong/sssssw26"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-first-n-natural-numbers-by-ng-yew-hong/sssssw26"/>
      <lastmod>2026-11-02T18:59:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/general-term-of-an-arithmetic-sequence/sssssw2g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/general-term-of-an-arithmetic-sequence/sssssw2g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/general-term-of-an-arithmetic-sequence/sssssw2g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/general-term-of-an-arithmetic-sequence/sssssw2g"/>
      <lastmod>2026-11-02T02:30:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/general-term-of-an-arithmetic-sequence/sssssw2g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/general-term-of-an-arithmetic-sequence/sssssw2g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/general-term-of-an-arithmetic-sequence/sssssw2g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/general-term-of-an-arithmetic-sequence/sssssw2g"/>
      <lastmod>2026-11-02T02:30:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/roll-until-simulating-random-processes-and-statistical-distributions/sssssw29</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roll-until-simulating-random-processes-and-statistical-distributions/sssssw29"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roll-until-simulating-random-processes-and-statistical-distributions/sssssw29"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roll-until-simulating-random-processes-and-statistical-distributions/sssssw29"/>
      <lastmod>2026-11-01T21:17:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/roll-until-simulating-random-processes-and-statistical-distributions/sssssw29</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roll-until-simulating-random-processes-and-statistical-distributions/sssssw29"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roll-until-simulating-random-processes-and-statistical-distributions/sssssw29"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roll-until-simulating-random-processes-and-statistical-distributions/sssssw29"/>
      <lastmod>2026-11-01T21:17:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vectors-in-three-dimensions/sssssw2e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-in-three-dimensions/sssssw2e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-in-three-dimensions/sssssw2e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-in-three-dimensions/sssssw2e"/>
      <lastmod>2026-11-02T18:56:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vectors-in-three-dimensions/sssssw2e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-in-three-dimensions/sssssw2e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-in-three-dimensions/sssssw2e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-in-three-dimensions/sssssw2e"/>
      <lastmod>2026-11-02T18:56:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-quadratic-construction-task-2/sssssw2v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-quadratic-construction-task-2/sssssw2v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-quadratic-construction-task-2/sssssw2v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-quadratic-construction-task-2/sssssw2v"/>
      <lastmod>2026-11-02T17:18:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-quadratic-construction-task-2/sssssw2v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-quadratic-construction-task-2/sssssw2v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-quadratic-construction-task-2/sssssw2v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-quadratic-construction-task-2/sssssw2v"/>
      <lastmod>2026-11-02T17:18:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/write-and-solve-equations-from-word-problems/sssssw24</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/write-and-solve-equations-from-word-problems/sssssw24"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/write-and-solve-equations-from-word-problems/sssssw24"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/write-and-solve-equations-from-word-problems/sssssw24"/>
      <lastmod>2026-11-02T16:50:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/write-and-solve-equations-from-word-problems/sssssw24</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/write-and-solve-equations-from-word-problems/sssssw24"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/write-and-solve-equations-from-word-problems/sssssw24"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/write-and-solve-equations-from-word-problems/sssssw24"/>
      <lastmod>2026-11-02T16:50:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-area-formula/sssssw2l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-area-formula/sssssw2l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-area-formula/sssssw2l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-area-formula/sssssw2l"/>
      <lastmod>2026-11-01T21:11:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-area-formula/sssssw2l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-area-formula/sssssw2l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-area-formula/sssssw2l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-area-formula/sssssw2l"/>
      <lastmod>2026-11-01T21:11:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logic-gates-interactive-demo-simulating-and-or-not-with-geometry/sssssw2y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logic-gates-interactive-demo-simulating-and-or-not-with-geometry/sssssw2y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logic-gates-interactive-demo-simulating-and-or-not-with-geometry/sssssw2y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logic-gates-interactive-demo-simulating-and-or-not-with-geometry/sssssw2y"/>
      <lastmod>2026-11-01T20:40:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logic-gates-interactive-demo-simulating-and-or-not-with-geometry/sssssw2y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logic-gates-interactive-demo-simulating-and-or-not-with-geometry/sssssw2y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logic-gates-interactive-demo-simulating-and-or-not-with-geometry/sssssw2y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logic-gates-interactive-demo-simulating-and-or-not-with-geometry/sssssw2y"/>
      <lastmod>2026-11-01T20:40:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/making-equilateral-triangles-on-isometric-grid/sssssw2a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-equilateral-triangles-on-isometric-grid/sssssw2a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-equilateral-triangles-on-isometric-grid/sssssw2a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-equilateral-triangles-on-isometric-grid/sssssw2a"/>
      <lastmod>2026-11-01T21:12:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/making-equilateral-triangles-on-isometric-grid/sssssw2a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/making-equilateral-triangles-on-isometric-grid/sssssw2a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/making-equilateral-triangles-on-isometric-grid/sssssw2a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/making-equilateral-triangles-on-isometric-grid/sssssw2a"/>
      <lastmod>2026-11-01T21:12:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-problem-generator/sssssw2c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-problem-generator/sssssw2c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-problem-generator/sssssw2c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-problem-generator/sssssw2c"/>
      <lastmod>2026-11-02T09:56:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-problem-generator/sssssw2c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-problem-generator/sssssw2c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-problem-generator/sssssw2c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-problem-generator/sssssw2c"/>
      <lastmod>2026-11-02T09:56:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a-curiosity-of-right-triangles/sssssw2r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-curiosity-of-right-triangles/sssssw2r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-curiosity-of-right-triangles/sssssw2r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-curiosity-of-right-triangles/sssssw2r"/>
      <lastmod>2026-11-02T16:44:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a-curiosity-of-right-triangles/sssssw2r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-curiosity-of-right-triangles/sssssw2r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-curiosity-of-right-triangles/sssssw2r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-curiosity-of-right-triangles/sssssw2r"/>
      <lastmod>2026-11-02T16:44:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-quiz/sssssw2h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-quiz/sssssw2h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-quiz/sssssw2h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-quiz/sssssw2h"/>
      <lastmod>2026-11-01T21:44:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-quiz/sssssw2h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-quiz/sssssw2h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-quiz/sssssw2h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-quiz/sssssw2h"/>
      <lastmod>2026-11-01T21:44:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-golden-rectangles/sssssw2t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-golden-rectangles/sssssw2t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-golden-rectangles/sssssw2t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-golden-rectangles/sssssw2t"/>
      <lastmod>2026-11-02T00:38:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-golden-rectangles/sssssw2t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-golden-rectangles/sssssw2t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-golden-rectangles/sssssw2t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-golden-rectangles/sssssw2t"/>
      <lastmod>2026-11-02T00:38:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-area-and-partial-volume-in-2d/sssssw2x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-area-and-partial-volume-in-2d/sssssw2x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-area-and-partial-volume-in-2d/sssssw2x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-area-and-partial-volume-in-2d/sssssw2x"/>
      <lastmod>2026-11-01T23:44:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-area-and-partial-volume-in-2d/sssssw2x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-area-and-partial-volume-in-2d/sssssw2x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-area-and-partial-volume-in-2d/sssssw2x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-area-and-partial-volume-in-2d/sssssw2x"/>
      <lastmod>2026-11-01T23:44:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-and-surface-area-of-prism/sssssw2i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-and-surface-area-of-prism/sssssw2i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-and-surface-area-of-prism/sssssw2i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-and-surface-area-of-prism/sssssw2i"/>
      <lastmod>2026-11-02T12:07:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-and-surface-area-of-prism/sssssw2i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-and-surface-area-of-prism/sssssw2i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-and-surface-area-of-prism/sssssw2i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-and-surface-area-of-prism/sssssw2i"/>
      <lastmod>2026-11-02T12:07:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/scaled-relationships-practice/sssssw2o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scaled-relationships-practice/sssssw2o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scaled-relationships-practice/sssssw2o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scaled-relationships-practice/sssssw2o"/>
      <lastmod>2026-11-02T10:40:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/scaled-relationships-practice/sssssw2o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scaled-relationships-practice/sssssw2o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scaled-relationships-practice/sssssw2o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scaled-relationships-practice/sssssw2o"/>
      <lastmod>2026-11-02T10:40:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/my-second-spiral-and-polygonal-stars/ssssswks</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/my-second-spiral-and-polygonal-stars/ssssswks"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/my-second-spiral-and-polygonal-stars/ssssswks"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/my-second-spiral-and-polygonal-stars/ssssswks"/>
      <lastmod>2026-11-01T19:33:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/my-second-spiral-and-polygonal-stars/ssssswks</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/my-second-spiral-and-polygonal-stars/ssssswks"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/my-second-spiral-and-polygonal-stars/ssssswks"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/my-second-spiral-and-polygonal-stars/ssssswks"/>
      <lastmod>2026-11-01T19:33:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-1-step-subtraction-equations/ssssswk7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-1-step-subtraction-equations/ssssswk7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-1-step-subtraction-equations/ssssswk7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-1-step-subtraction-equations/ssssswk7"/>
      <lastmod>2026-11-02T13:49:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-1-step-subtraction-equations/ssssswk7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-1-step-subtraction-equations/ssssswk7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-1-step-subtraction-equations/ssssswk7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-1-step-subtraction-equations/ssssswk7"/>
      <lastmod>2026-11-02T13:49:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/times-table/ssssswkn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/times-table/ssssswkn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/times-table/ssssswkn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/times-table/ssssswkn"/>
      <lastmod>2026-11-01T19:23:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/times-table/ssssswkn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/times-table/ssssswkn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/times-table/ssssswkn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/times-table/ssssswkn"/>
      <lastmod>2026-11-01T19:23:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-volume-calculation-demo-by/ssssswk2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-volume-calculation-demo-by/ssssswk2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-volume-calculation-demo-by/ssssswk2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-volume-calculation-demo-by/ssssswk2"/>
      <lastmod>2026-11-02T02:52:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-volume-calculation-demo-by/ssssswk2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-volume-calculation-demo-by/ssssswk2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-volume-calculation-demo-by/ssssswk2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-volume-calculation-demo-by/ssssswk2"/>
      <lastmod>2026-11-02T02:52:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-and-sphere-angle-relationship-demo/ssssswkk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-and-sphere-angle-relationship-demo/ssssswkk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-and-sphere-angle-relationship-demo/ssssswkk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-and-sphere-angle-relationship-demo/ssssswkk"/>
      <lastmod>2026-11-02T17:51:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-and-sphere-angle-relationship-demo/ssssswkk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-and-sphere-angle-relationship-demo/ssssswkk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-and-sphere-angle-relationship-demo/ssssswkk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-and-sphere-angle-relationship-demo/ssssswkk"/>
      <lastmod>2026-11-02T17:51:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-proof-of-sas-triangle-congruence-theorem-by-aaron-dankman/ssssswkz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-sas-triangle-congruence-theorem-by-aaron-dankman/ssssswkz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-proof-of-sas-triangle-congruence-theorem-by-aaron-dankman/ssssswkz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-sas-triangle-congruence-theorem-by-aaron-dankman/ssssswkz"/>
      <lastmod>2026-11-02T12:34:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-proof-of-sas-triangle-congruence-theorem-by-aaron-dankman/ssssswkz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-sas-triangle-congruence-theorem-by-aaron-dankman/ssssswkz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-proof-of-sas-triangle-congruence-theorem-by-aaron-dankman/ssssswkz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-sas-triangle-congruence-theorem-by-aaron-dankman/ssssswkz"/>
      <lastmod>2026-11-02T12:34:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-functions-standard-form/ssssswk0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions-standard-form/ssssswk0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions-standard-form/ssssswk0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions-standard-form/ssssswk0"/>
      <lastmod>2026-11-02T00:20:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-functions-standard-form/ssssswk0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions-standard-form/ssssswk0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions-standard-form/ssssswk0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions-standard-form/ssssswk0"/>
      <lastmod>2026-11-02T00:20:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-addition-demo-conditional-logic-in-geogebra/ssssswkd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-addition-demo-conditional-logic-in-geogebra/ssssswkd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-addition-demo-conditional-logic-in-geogebra/ssssswkd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-addition-demo-conditional-logic-in-geogebra/ssssswkd"/>
      <lastmod>2026-11-02T00:29:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-addition-demo-conditional-logic-in-geogebra/ssssswkd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-addition-demo-conditional-logic-in-geogebra/ssssswkd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-addition-demo-conditional-logic-in-geogebra/ssssswkd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-addition-demo-conditional-logic-in-geogebra/ssssswkd"/>
      <lastmod>2026-11-02T00:29:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/congruence-demonstration/ssssswkf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruence-demonstration/ssssswkf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruence-demonstration/ssssswkf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruence-demonstration/ssssswkf"/>
      <lastmod>2026-11-01T20:57:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/congruence-demonstration/ssssswkf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruence-demonstration/ssssswkf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruence-demonstration/ssssswkf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruence-demonstration/ssssswkf"/>
      <lastmod>2026-11-01T20:57:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/loci-of-equal-distance-on-an-argand-diagram/ssssswk8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/loci-of-equal-distance-on-an-argand-diagram/ssssswk8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/loci-of-equal-distance-on-an-argand-diagram/ssssswk8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/loci-of-equal-distance-on-an-argand-diagram/ssssswk8"/>
      <lastmod>2026-11-01T20:17:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/loci-of-equal-distance-on-an-argand-diagram/ssssswk8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/loci-of-equal-distance-on-an-argand-diagram/ssssswk8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/loci-of-equal-distance-on-an-argand-diagram/ssssswk8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/loci-of-equal-distance-on-an-argand-diagram/ssssswk8"/>
      <lastmod>2026-11-01T20:17:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cuboid-diagonal-calculation/ssssswku</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cuboid-diagonal-calculation/ssssswku"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cuboid-diagonal-calculation/ssssswku"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cuboid-diagonal-calculation/ssssswku"/>
      <lastmod>2026-11-01T20:50:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cuboid-diagonal-calculation/ssssswku</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cuboid-diagonal-calculation/ssssswku"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cuboid-diagonal-calculation/ssssswku"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cuboid-diagonal-calculation/ssssswku"/>
      <lastmod>2026-11-01T20:50:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/determinants-and-areas-in-2d/ssssswk5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/determinants-and-areas-in-2d/ssssswk5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/determinants-and-areas-in-2d/ssssswk5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/determinants-and-areas-in-2d/ssssswk5"/>
      <lastmod>2026-11-02T11:46:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/determinants-and-areas-in-2d/ssssswk5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/determinants-and-areas-in-2d/ssssswk5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/determinants-and-areas-in-2d/ssssswk5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/determinants-and-areas-in-2d/ssssswk5"/>
      <lastmod>2026-11-02T11:46:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a-peanut-jumping-over-a-wall/ssssswkb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-peanut-jumping-over-a-wall/ssssswkb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-peanut-jumping-over-a-wall/ssssswkb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-peanut-jumping-over-a-wall/ssssswkb"/>
      <lastmod>2026-11-02T03:11:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a-peanut-jumping-over-a-wall/ssssswkb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-peanut-jumping-over-a-wall/ssssswkb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-peanut-jumping-over-a-wall/ssssswkb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-peanut-jumping-over-a-wall/ssssswkb"/>
      <lastmod>2026-11-02T03:11:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/definition-and-construction-of-a-prism/ssssswk3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-and-construction-of-a-prism/ssssswk3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-and-construction-of-a-prism/ssssswk3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-and-construction-of-a-prism/ssssswk3"/>
      <lastmod>2026-11-02T12:26:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/definition-and-construction-of-a-prism/ssssswk3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/definition-and-construction-of-a-prism/ssssswk3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/definition-and-construction-of-a-prism/ssssswk3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/definition-and-construction-of-a-prism/ssssswk3"/>
      <lastmod>2026-11-02T12:26:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/barycentric-coordinates-by-jonathan-holland/ssssswkq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/barycentric-coordinates-by-jonathan-holland/ssssswkq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/barycentric-coordinates-by-jonathan-holland/ssssswkq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/barycentric-coordinates-by-jonathan-holland/ssssswkq"/>
      <lastmod>2026-11-02T18:40:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/barycentric-coordinates-by-jonathan-holland/ssssswkq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/barycentric-coordinates-by-jonathan-holland/ssssswkq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/barycentric-coordinates-by-jonathan-holland/ssssswkq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/barycentric-coordinates-by-jonathan-holland/ssssswkq"/>
      <lastmod>2026-11-02T18:40:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/de-casteljau-s-algorithm-demo/ssssswk1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/de-casteljau-s-algorithm-demo/ssssswk1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/de-casteljau-s-algorithm-demo/ssssswk1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/de-casteljau-s-algorithm-demo/ssssswk1"/>
      <lastmod>2026-11-02T08:43:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/de-casteljau-s-algorithm-demo/ssssswk1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/de-casteljau-s-algorithm-demo/ssssswk1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/de-casteljau-s-algorithm-demo/ssssswk1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/de-casteljau-s-algorithm-demo/ssssswk1"/>
      <lastmod>2026-11-02T08:43:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/klein-bottle-surface/ssssswkm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/klein-bottle-surface/ssssswkm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/klein-bottle-surface/ssssswkm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/klein-bottle-surface/ssssswkm"/>
      <lastmod>2026-11-02T13:29:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/klein-bottle-surface/ssssswkm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/klein-bottle-surface/ssssswkm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/klein-bottle-surface/ssssswkm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/klein-bottle-surface/ssssswkm"/>
      <lastmod>2026-11-02T13:29:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-trig-functions/ssssswkj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-trig-functions/ssssswkj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-trig-functions/ssssswkj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-trig-functions/ssssswkj"/>
      <lastmod>2026-11-02T16:52:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-trig-functions/ssssswkj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-trig-functions/ssssswkj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-trig-functions/ssssswkj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-trig-functions/ssssswkj"/>
      <lastmod>2026-11-02T16:52:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/investigating-derivatives-of-y-a-x/ssssswkp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-derivatives-of-y-a-x/ssssswkp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-derivatives-of-y-a-x/ssssswkp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-derivatives-of-y-a-x/ssssswkp"/>
      <lastmod>2026-11-02T02:57:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/investigating-derivatives-of-y-a-x/ssssswkp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-derivatives-of-y-a-x/ssssswkp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-derivatives-of-y-a-x/ssssswkp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-derivatives-of-y-a-x/ssssswkp"/>
      <lastmod>2026-11-02T02:57:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-demonstration-by-erin-thompson/ssssswkw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-demonstration-by-erin-thompson/ssssswkw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-demonstration-by-erin-thompson/ssssswkw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-demonstration-by-erin-thompson/ssssswkw"/>
      <lastmod>2026-11-01T23:27:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-demonstration-by-erin-thompson/ssssswkw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-demonstration-by-erin-thompson/ssssswkw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-demonstration-by-erin-thompson/ssssswkw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-demonstration-by-erin-thompson/ssssswkw"/>
      <lastmod>2026-11-01T23:27:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-sine-wave-addition-using-complex-numbers/ssssswk6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-sine-wave-addition-using-complex-numbers/ssssswk6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-sine-wave-addition-using-complex-numbers/ssssswk6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-sine-wave-addition-using-complex-numbers/ssssswk6"/>
      <lastmod>2026-11-01T19:30:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-sine-wave-addition-using-complex-numbers/ssssswk6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-sine-wave-addition-using-complex-numbers/ssssswk6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-sine-wave-addition-using-complex-numbers/ssssswk6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-sine-wave-addition-using-complex-numbers/ssssswk6"/>
      <lastmod>2026-11-01T19:30:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-cross-section/ssssswkg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-cross-section/ssssswkg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-cross-section/ssssswkg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-cross-section/ssssswkg"/>
      <lastmod>2026-11-01T19:32:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-cross-section/ssssswkg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-cross-section/ssssswkg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-cross-section/ssssswkg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-cross-section/ssssswkg"/>
      <lastmod>2026-11-01T19:32:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-6-2-6-practice-introducing-double-number-line-diagrams/ssssswk9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-2-6-practice-introducing-double-number-line-diagrams/ssssswk9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-2-6-practice-introducing-double-number-line-diagrams/ssssswk9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-2-6-practice-introducing-double-number-line-diagrams/ssssswk9"/>
      <lastmod>2026-11-01T20:24:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-6-2-6-practice-introducing-double-number-line-diagrams/ssssswk9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-2-6-practice-introducing-double-number-line-diagrams/ssssswk9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-2-6-practice-introducing-double-number-line-diagrams/ssssswk9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-2-6-practice-introducing-double-number-line-diagrams/ssssswk9"/>
      <lastmod>2026-11-01T20:24:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-functions-relationships/ssssswke</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-functions-relationships/ssssswke"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-functions-relationships/ssssswke"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-functions-relationships/ssssswke"/>
      <lastmod>2026-11-02T17:00:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-functions-relationships/ssssswke</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-functions-relationships/ssssswke"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-functions-relationships/ssssswke"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-functions-relationships/ssssswke"/>
      <lastmod>2026-11-02T17:00:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-reflection-transformation-rules/ssssswkv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-reflection-transformation-rules/ssssswkv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-reflection-transformation-rules/ssssswkv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-reflection-transformation-rules/ssssswkv"/>
      <lastmod>2026-11-02T00:14:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-reflection-transformation-rules/ssssswkv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-reflection-transformation-rules/ssssswkv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-reflection-transformation-rules/ssssswkv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-reflection-transformation-rules/ssssswkv"/>
      <lastmod>2026-11-02T00:14:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plotting-points-in-3d-ar-template/ssssswk4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-points-in-3d-ar-template/ssssswk4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-points-in-3d-ar-template/ssssswk4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-points-in-3d-ar-template/ssssswk4"/>
      <lastmod>2026-11-01T23:36:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plotting-points-in-3d-ar-template/ssssswk4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-points-in-3d-ar-template/ssssswk4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-points-in-3d-ar-template/ssssswk4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-points-in-3d-ar-template/ssssswk4"/>
      <lastmod>2026-11-01T23:36:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/google-photos-logo-geometric-construction/ssssswkl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/google-photos-logo-geometric-construction/ssssswkl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/google-photos-logo-geometric-construction/ssssswkl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/google-photos-logo-geometric-construction/ssssswkl"/>
      <lastmod>2026-11-01T21:28:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/google-photos-logo-geometric-construction/ssssswkl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/google-photos-logo-geometric-construction/ssssswkl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/google-photos-logo-geometric-construction/ssssswkl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/google-photos-logo-geometric-construction/ssssswkl"/>
      <lastmod>2026-11-01T21:28:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/4-moments-page-80-polynomial-functions-geometric-construction/ssssswky</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/4-moments-page-80-polynomial-functions-geometric-construction/ssssswky"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/4-moments-page-80-polynomial-functions-geometric-construction/ssssswky"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/4-moments-page-80-polynomial-functions-geometric-construction/ssssswky"/>
      <lastmod>2026-11-02T06:13:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/4-moments-page-80-polynomial-functions-geometric-construction/ssssswky</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/4-moments-page-80-polynomial-functions-geometric-construction/ssssswky"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/4-moments-page-80-polynomial-functions-geometric-construction/ssssswky"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/4-moments-page-80-polynomial-functions-geometric-construction/ssssswky"/>
      <lastmod>2026-11-02T06:13:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-fraction-multiplication-by-edu-rordorfc/ssssswka</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-fraction-multiplication-by-edu-rordorfc/ssssswka"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-fraction-multiplication-by-edu-rordorfc/ssssswka"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-fraction-multiplication-by-edu-rordorfc/ssssswka"/>
      <lastmod>2026-11-02T18:28:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-fraction-multiplication-by-edu-rordorfc/ssssswka</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-fraction-multiplication-by-edu-rordorfc/ssssswka"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-fraction-multiplication-by-edu-rordorfc/ssssswka"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-fraction-multiplication-by-edu-rordorfc/ssssswka"/>
      <lastmod>2026-11-02T18:28:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/write-the-equation-of-a-line-practice/ssssswkc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/write-the-equation-of-a-line-practice/ssssswkc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/write-the-equation-of-a-line-practice/ssssswkc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/write-the-equation-of-a-line-practice/ssssswkc"/>
      <lastmod>2026-11-01T19:18:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/write-the-equation-of-a-line-practice/ssssswkc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/write-the-equation-of-a-line-practice/ssssswkc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/write-the-equation-of-a-line-practice/ssssswkc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/write-the-equation-of-a-line-practice/ssssswkc"/>
      <lastmod>2026-11-01T19:18:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/decimal-number-visualizer-tenths/ssssswkr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-number-visualizer-tenths/ssssswkr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-number-visualizer-tenths/ssssswkr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-number-visualizer-tenths/ssssswkr"/>
      <lastmod>2026-11-01T19:03:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/decimal-number-visualizer-tenths/ssssswkr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-number-visualizer-tenths/ssssswkr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-number-visualizer-tenths/ssssswkr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-number-visualizer-tenths/ssssswkr"/>
      <lastmod>2026-11-01T19:03:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-proof-without-words-drag-to-explore/ssssswkh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-proof-without-words-drag-to-explore/ssssswkh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-proof-without-words-drag-to-explore/ssssswkh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-proof-without-words-drag-to-explore/ssssswkh"/>
      <lastmod>2026-11-01T21:41:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-proof-without-words-drag-to-explore/ssssswkh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-proof-without-words-drag-to-explore/ssssswkh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-proof-without-words-drag-to-explore/ssssswkh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-proof-without-words-drag-to-explore/ssssswkh"/>
      <lastmod>2026-11-01T21:41:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/matrix-transformation-and-probability/ssssswkt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-transformation-and-probability/ssssswkt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-transformation-and-probability/ssssswkt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-transformation-and-probability/ssssswkt"/>
      <lastmod>2026-11-01T23:25:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/matrix-transformation-and-probability/ssssswkt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-transformation-and-probability/ssssswkt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-transformation-and-probability/ssssswkt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-transformation-and-probability/ssssswkt"/>
      <lastmod>2026-11-01T23:25:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sunflower-points-distribution-on-sphere/ssssswkx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sunflower-points-distribution-on-sphere/ssssswkx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sunflower-points-distribution-on-sphere/ssssswkx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sunflower-points-distribution-on-sphere/ssssswkx"/>
      <lastmod>2026-11-02T18:28:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sunflower-points-distribution-on-sphere/ssssswkx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sunflower-points-distribution-on-sphere/ssssswkx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sunflower-points-distribution-on-sphere/ssssswkx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sunflower-points-distribution-on-sphere/ssssswkx"/>
      <lastmod>2026-11-02T18:28:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fuel-consumption-calculator/ssssswki</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fuel-consumption-calculator/ssssswki"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fuel-consumption-calculator/ssssswki"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fuel-consumption-calculator/ssssswki"/>
      <lastmod>2026-11-01T21:36:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fuel-consumption-calculator/ssssswki</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fuel-consumption-calculator/ssssswki"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fuel-consumption-calculator/ssssswki"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fuel-consumption-calculator/ssssswki"/>
      <lastmod>2026-11-01T21:36:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagoras-cylinder/ssssswko</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagoras-cylinder/ssssswko"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagoras-cylinder/ssssswko"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagoras-cylinder/ssssswko"/>
      <lastmod>2026-11-01T23:56:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagoras-cylinder/ssssswko</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagoras-cylinder/ssssswko"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagoras-cylinder/ssssswko"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagoras-cylinder/ssssswko"/>
      <lastmod>2026-11-01T23:56:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponent-properties-demo/ssssswzs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-properties-demo/ssssswzs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-properties-demo/ssssswzs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-properties-demo/ssssswzs"/>
      <lastmod>2026-11-02T03:09:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponent-properties-demo/ssssswzs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-properties-demo/ssssswzs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-properties-demo/ssssswzs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-properties-demo/ssssswzs"/>
      <lastmod>2026-11-02T03:09:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/choose-the-translations/ssssswz7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/choose-the-translations/ssssswz7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/choose-the-translations/ssssswz7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/choose-the-translations/ssssswz7"/>
      <lastmod>2026-11-02T18:36:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/choose-the-translations/ssssswz7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/choose-the-translations/ssssswz7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/choose-the-translations/ssssswz7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/choose-the-translations/ssssswz7"/>
      <lastmod>2026-11-02T18:36:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/numerical-exploration-of-equivalent-fractions/ssssswzn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/numerical-exploration-of-equivalent-fractions/ssssswzn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/numerical-exploration-of-equivalent-fractions/ssssswzn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/numerical-exploration-of-equivalent-fractions/ssssswzn"/>
      <lastmod>2026-11-02T17:06:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/numerical-exploration-of-equivalent-fractions/ssssswzn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/numerical-exploration-of-equivalent-fractions/ssssswzn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/numerical-exploration-of-equivalent-fractions/ssssswzn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/numerical-exploration-of-equivalent-fractions/ssssswzn"/>
      <lastmod>2026-11-02T17:06:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocentric-quadrilateral-and-hyperbola-construction/ssssswz2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocentric-quadrilateral-and-hyperbola-construction/ssssswz2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocentric-quadrilateral-and-hyperbola-construction/ssssswz2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocentric-quadrilateral-and-hyperbola-construction/ssssswz2"/>
      <lastmod>2026-11-02T00:28:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocentric-quadrilateral-and-hyperbola-construction/ssssswz2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocentric-quadrilateral-and-hyperbola-construction/ssssswz2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocentric-quadrilateral-and-hyperbola-construction/ssssswz2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocentric-quadrilateral-and-hyperbola-construction/ssssswz2"/>
      <lastmod>2026-11-02T00:28:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-planes-and-linear-approximations-example/ssssswzk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-planes-and-linear-approximations-example/ssssswzk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-planes-and-linear-approximations-example/ssssswzk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-planes-and-linear-approximations-example/ssssswzk"/>
      <lastmod>2026-11-02T02:46:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-planes-and-linear-approximations-example/ssssswzk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-planes-and-linear-approximations-example/ssssswzk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-planes-and-linear-approximations-example/ssssswzk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-planes-and-linear-approximations-example/ssssswzk"/>
      <lastmod>2026-11-02T02:46:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-number-c-1-25/ssssswzz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-c-1-25/ssssswzz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-c-1-25/ssssswzz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-c-1-25/ssssswzz"/>
      <lastmod>2026-11-01T21:14:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-number-c-1-25/ssssswzz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-c-1-25/ssssswzz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-c-1-25/ssssswzz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-c-1-25/ssssswzz"/>
      <lastmod>2026-11-01T21:14:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/p6-symmetry-problem-1-hanging-axis-of-symmetry/ssssswz0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p6-symmetry-problem-1-hanging-axis-of-symmetry/ssssswz0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p6-symmetry-problem-1-hanging-axis-of-symmetry/ssssswz0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p6-symmetry-problem-1-hanging-axis-of-symmetry/ssssswz0"/>
      <lastmod>2026-11-01T20:45:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/p6-symmetry-problem-1-hanging-axis-of-symmetry/ssssswz0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p6-symmetry-problem-1-hanging-axis-of-symmetry/ssssswz0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p6-symmetry-problem-1-hanging-axis-of-symmetry/ssssswz0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p6-symmetry-problem-1-hanging-axis-of-symmetry/ssssswz0"/>
      <lastmod>2026-11-01T20:45:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/differentiation-example-discovering-the-vertical-angles-theorem/ssssswzd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/differentiation-example-discovering-the-vertical-angles-theorem/ssssswzd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/differentiation-example-discovering-the-vertical-angles-theorem/ssssswzd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/differentiation-example-discovering-the-vertical-angles-theorem/ssssswzd"/>
      <lastmod>2026-11-02T18:39:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/differentiation-example-discovering-the-vertical-angles-theorem/ssssswzd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/differentiation-example-discovering-the-vertical-angles-theorem/ssssswzd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/differentiation-example-discovering-the-vertical-angles-theorem/ssssswzd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/differentiation-example-discovering-the-vertical-angles-theorem/ssssswzd"/>
      <lastmod>2026-11-02T18:39:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-constant-of-proportionality/ssssswzf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-constant-of-proportionality/ssssswzf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-constant-of-proportionality/ssssswzf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-constant-of-proportionality/ssssswzf"/>
      <lastmod>2026-11-01T23:05:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-constant-of-proportionality/ssssswzf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-constant-of-proportionality/ssssswzf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-constant-of-proportionality/ssssswzf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-constant-of-proportionality/ssssswzf"/>
      <lastmod>2026-11-01T23:05:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/directed-number-subtraction-demo/ssssswz8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directed-number-subtraction-demo/ssssswz8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directed-number-subtraction-demo/ssssswz8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directed-number-subtraction-demo/ssssswz8"/>
      <lastmod>2026-11-01T19:11:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/directed-number-subtraction-demo/ssssswz8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/directed-number-subtraction-demo/ssssswz8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/directed-number-subtraction-demo/ssssswz8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/directed-number-subtraction-demo/ssssswz8"/>
      <lastmod>2026-11-01T19:11:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pursuit-curves-on-a-cube/ssssswzu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pursuit-curves-on-a-cube/ssssswzu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pursuit-curves-on-a-cube/ssssswzu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pursuit-curves-on-a-cube/ssssswzu"/>
      <lastmod>2026-11-01T19:34:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pursuit-curves-on-a-cube/ssssswzu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pursuit-curves-on-a-cube/ssssswzu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pursuit-curves-on-a-cube/ssssswzu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pursuit-curves-on-a-cube/ssssswzu"/>
      <lastmod>2026-11-01T19:34:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/yavuz-sultan-selim-han-geometry-example/ssssswz5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/yavuz-sultan-selim-han-geometry-example/ssssswz5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/yavuz-sultan-selim-han-geometry-example/ssssswz5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/yavuz-sultan-selim-han-geometry-example/ssssswz5"/>
      <lastmod>2026-11-01T21:01:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/yavuz-sultan-selim-han-geometry-example/ssssswz5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/yavuz-sultan-selim-han-geometry-example/ssssswz5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/yavuz-sultan-selim-han-geometry-example/ssssswz5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/yavuz-sultan-selim-han-geometry-example/ssssswz5"/>
      <lastmod>2026-11-01T21:01:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/accumulation-of-area-under-linear-functions/ssssswzb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/accumulation-of-area-under-linear-functions/ssssswzb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/accumulation-of-area-under-linear-functions/ssssswzb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/accumulation-of-area-under-linear-functions/ssssswzb"/>
      <lastmod>2026-11-01T19:20:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/accumulation-of-area-under-linear-functions/ssssswzb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/accumulation-of-area-under-linear-functions/ssssswzb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/accumulation-of-area-under-linear-functions/ssssswzb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/accumulation-of-area-under-linear-functions/ssssswzb"/>
      <lastmod>2026-11-01T19:20:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-by-karen-krieger/ssssswz3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-by-karen-krieger/ssssswz3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-by-karen-krieger/ssssswz3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-by-karen-krieger/ssssswz3"/>
      <lastmod>2026-11-02T07:12:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-by-karen-krieger/ssssswz3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-by-karen-krieger/ssssswz3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-by-karen-krieger/ssssswz3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-by-karen-krieger/ssssswz3"/>
      <lastmod>2026-11-02T07:12:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/regular-tetrahedron/ssssswzq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-tetrahedron/ssssswzq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-tetrahedron/ssssswzq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-tetrahedron/ssssswzq"/>
      <lastmod>2026-11-01T21:58:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/regular-tetrahedron/ssssswzq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-tetrahedron/ssssswzq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-tetrahedron/ssssswzq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-tetrahedron/ssssswzq"/>
      <lastmod>2026-11-01T21:58:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/squared-rectangle-1/ssssswz1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squared-rectangle-1/ssssswz1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squared-rectangle-1/ssssswz1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squared-rectangle-1/ssssswz1"/>
      <lastmod>2026-11-01T23:36:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/squared-rectangle-1/ssssswz1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/squared-rectangle-1/ssssswz1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/squared-rectangle-1/ssssswz1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/squared-rectangle-1/ssssswz1"/>
      <lastmod>2026-11-01T23:36:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sagittarius-3d/ssssswzm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sagittarius-3d/ssssswzm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sagittarius-3d/ssssswzm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sagittarius-3d/ssssswzm"/>
      <lastmod>2026-11-01T19:28:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sagittarius-3d/ssssswzm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sagittarius-3d/ssssswzm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sagittarius-3d/ssssswzm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sagittarius-3d/ssssswzm"/>
      <lastmod>2026-11-01T19:28:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-construction/ssssswzj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-construction/ssssswzj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-construction/ssssswzj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-construction/ssssswzj"/>
      <lastmod>2026-11-01T21:13:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-construction/ssssswzj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-construction/ssssswzj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-construction/ssssswzj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-construction/ssssswzj"/>
      <lastmod>2026-11-01T21:13:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-slider-demo/ssssswzp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-slider-demo/ssssswzp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-slider-demo/ssssswzp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-slider-demo/ssssswzp"/>
      <lastmod>2026-11-02T09:54:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-slider-demo/ssssswzp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-slider-demo/ssssswzp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-slider-demo/ssssswzp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-slider-demo/ssssswzp"/>
      <lastmod>2026-11-02T09:54:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perspective-projections-of-curves-on-a-cone-zoom/ssssswzw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perspective-projections-of-curves-on-a-cone-zoom/ssssswzw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perspective-projections-of-curves-on-a-cone-zoom/ssssswzw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perspective-projections-of-curves-on-a-cone-zoom/ssssswzw"/>
      <lastmod>2026-11-02T00:04:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perspective-projections-of-curves-on-a-cone-zoom/ssssswzw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perspective-projections-of-curves-on-a-cone-zoom/ssssswzw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perspective-projections-of-curves-on-a-cone-zoom/ssssswzw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perspective-projections-of-curves-on-a-cone-zoom/ssssswzw"/>
      <lastmod>2026-11-02T00:04:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polynomial-division-and-function-graph-analysis/ssssswz6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-division-and-function-graph-analysis/ssssswz6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-division-and-function-graph-analysis/ssssswz6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-division-and-function-graph-analysis/ssssswz6"/>
      <lastmod>2026-11-02T00:15:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polynomial-division-and-function-graph-analysis/ssssswz6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-division-and-function-graph-analysis/ssssswz6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-division-and-function-graph-analysis/ssssswz6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-division-and-function-graph-analysis/ssssswz6"/>
      <lastmod>2026-11-02T00:15:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/can-you-prove-the-pythagorean-theorem-dynamic-geometry-exploration/ssssswzg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/can-you-prove-the-pythagorean-theorem-dynamic-geometry-exploration/ssssswzg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/can-you-prove-the-pythagorean-theorem-dynamic-geometry-exploration/ssssswzg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/can-you-prove-the-pythagorean-theorem-dynamic-geometry-exploration/ssssswzg"/>
      <lastmod>2026-11-02T06:09:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/can-you-prove-the-pythagorean-theorem-dynamic-geometry-exploration/ssssswzg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/can-you-prove-the-pythagorean-theorem-dynamic-geometry-exploration/ssssswzg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/can-you-prove-the-pythagorean-theorem-dynamic-geometry-exploration/ssssswzg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/can-you-prove-the-pythagorean-theorem-dynamic-geometry-exploration/ssssswzg"/>
      <lastmod>2026-11-02T06:09:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-lines-through-a-point/ssssswz9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-lines-through-a-point/ssssswz9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-lines-through-a-point/ssssswz9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-lines-through-a-point/ssssswz9"/>
      <lastmod>2026-11-01T19:18:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-lines-through-a-point/ssssswz9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-lines-through-a-point/ssssswz9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-lines-through-a-point/ssssswz9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-lines-through-a-point/ssssswz9"/>
      <lastmod>2026-11-01T19:18:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-y-a-x/ssssswze</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-y-a-x/ssssswze"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-y-a-x/ssssswze"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-y-a-x/ssssswze"/>
      <lastmod>2026-11-01T23:56:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-of-y-a-x/ssssswze</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-y-a-x/ssssswze"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-y-a-x/ssssswze"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-y-a-x/ssssswze"/>
      <lastmod>2026-11-01T23:56:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/enlarge-a-hexagon/ssssswzv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/enlarge-a-hexagon/ssssswzv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/enlarge-a-hexagon/ssssswzv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/enlarge-a-hexagon/ssssswzv"/>
      <lastmod>2026-11-01T21:25:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/enlarge-a-hexagon/ssssswzv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/enlarge-a-hexagon/ssssswzv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/enlarge-a-hexagon/ssssswzv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/enlarge-a-hexagon/ssssswzv"/>
      <lastmod>2026-11-01T21:25:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/point-reflection-try-it-yourself/ssssswz4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-reflection-try-it-yourself/ssssswz4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-reflection-try-it-yourself/ssssswz4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-reflection-try-it-yourself/ssssswz4"/>
      <lastmod>2026-11-02T16:50:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/point-reflection-try-it-yourself/ssssswz4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-reflection-try-it-yourself/ssssswz4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-reflection-try-it-yourself/ssssswz4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-reflection-try-it-yourself/ssssswz4"/>
      <lastmod>2026-11-02T16:50:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-geometric-construction-focus-directrix-definition/ssssswzl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-geometric-construction-focus-directrix-definition/ssssswzl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-geometric-construction-focus-directrix-definition/ssssswzl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-geometric-construction-focus-directrix-definition/ssssswzl"/>
      <lastmod>2026-11-01T22:11:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-geometric-construction-focus-directrix-definition/ssssswzl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-geometric-construction-focus-directrix-definition/ssssswzl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-geometric-construction-focus-directrix-definition/ssssswzl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-geometric-construction-focus-directrix-definition/ssssswzl"/>
      <lastmod>2026-11-01T22:11:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sydney-harbour-bridge-parabola/ssssswzy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sydney-harbour-bridge-parabola/ssssswzy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sydney-harbour-bridge-parabola/ssssswzy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sydney-harbour-bridge-parabola/ssssswzy"/>
      <lastmod>2026-11-02T11:49:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sydney-harbour-bridge-parabola/ssssswzy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sydney-harbour-bridge-parabola/ssssswzy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sydney-harbour-bridge-parabola/ssssswzy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sydney-harbour-bridge-parabola/ssssswzy"/>
      <lastmod>2026-11-02T11:49:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplication-by-11-and-squaring-of-2-digit-numbers/ssssswza</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-by-11-and-squaring-of-2-digit-numbers/ssssswza"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-by-11-and-squaring-of-2-digit-numbers/ssssswza"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-by-11-and-squaring-of-2-digit-numbers/ssssswza"/>
      <lastmod>2026-11-02T09:35:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplication-by-11-and-squaring-of-2-digit-numbers/ssssswza</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-by-11-and-squaring-of-2-digit-numbers/ssssswza"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-by-11-and-squaring-of-2-digit-numbers/ssssswza"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-by-11-and-squaring-of-2-digit-numbers/ssssswza"/>
      <lastmod>2026-11-02T09:35:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/central-angle-exploration-relationship-to-regular-polygon-sides/ssssswzc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/central-angle-exploration-relationship-to-regular-polygon-sides/ssssswzc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/central-angle-exploration-relationship-to-regular-polygon-sides/ssssswzc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/central-angle-exploration-relationship-to-regular-polygon-sides/ssssswzc"/>
      <lastmod>2026-11-02T18:05:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/central-angle-exploration-relationship-to-regular-polygon-sides/ssssswzc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/central-angle-exploration-relationship-to-regular-polygon-sides/ssssswzc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/central-angle-exploration-relationship-to-regular-polygon-sides/ssssswzc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/central-angle-exploration-relationship-to-regular-polygon-sides/ssssswzc"/>
      <lastmod>2026-11-02T18:05:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoid-tessellation/ssssswzr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-tessellation/ssssswzr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-tessellation/ssssswzr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-tessellation/ssssswzr"/>
      <lastmod>2026-11-01T21:45:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoid-tessellation/ssssswzr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-tessellation/ssssswzr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-tessellation/ssssswzr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-tessellation/ssssswzr"/>
      <lastmod>2026-11-01T21:45:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parametric-equation-of-a-hyperbola/ssssswzh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-equation-of-a-hyperbola/ssssswzh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-equation-of-a-hyperbola/ssssswzh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-equation-of-a-hyperbola/ssssswzh"/>
      <lastmod>2026-11-02T02:50:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parametric-equation-of-a-hyperbola/ssssswzh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-equation-of-a-hyperbola/ssssswzh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-equation-of-a-hyperbola/ssssswzh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-equation-of-a-hyperbola/ssssswzh"/>
      <lastmod>2026-11-02T02:50:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygon-rotation-art/ssssswzt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-rotation-art/ssssswzt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-rotation-art/ssssswzt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-rotation-art/ssssswzt"/>
      <lastmod>2026-11-01T19:12:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygon-rotation-art/ssssswzt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-rotation-art/ssssswzt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-rotation-art/ssssswzt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-rotation-art/ssssswzt"/>
      <lastmod>2026-11-01T19:12:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-6-2-3-lesson-recipes/ssssswzx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-2-3-lesson-recipes/ssssswzx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-2-3-lesson-recipes/ssssswzx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-2-3-lesson-recipes/ssssswzx"/>
      <lastmod>2026-11-01T20:38:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-6-2-3-lesson-recipes/ssssswzx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-2-3-lesson-recipes/ssssswzx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-2-3-lesson-recipes/ssssswzx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-2-3-lesson-recipes/ssssswzx"/>
      <lastmod>2026-11-01T20:38:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-geogebra-graphing-calculator-features/ssssswzi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-geogebra-graphing-calculator-features/ssssswzi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-geogebra-graphing-calculator-features/ssssswzi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-geogebra-graphing-calculator-features/ssssswzi"/>
      <lastmod>2026-11-01T23:21:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-geogebra-graphing-calculator-features/ssssswzi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-geogebra-graphing-calculator-features/ssssswzi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-geogebra-graphing-calculator-features/ssssswzi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-geogebra-graphing-calculator-features/ssssswzi"/>
      <lastmod>2026-11-01T23:21:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ti84-normal-distribution-practice/ssssswzo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ti84-normal-distribution-practice/ssssswzo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ti84-normal-distribution-practice/ssssswzo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ti84-normal-distribution-practice/ssssswzo"/>
      <lastmod>2026-11-02T16:51:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ti84-normal-distribution-practice/ssssswzo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ti84-normal-distribution-practice/ssssswzo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ti84-normal-distribution-practice/ssssswzo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ti84-normal-distribution-practice/ssssswzo"/>
      <lastmod>2026-11-02T16:51:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perspective-ellipse-construction/sssssw0s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perspective-ellipse-construction/sssssw0s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perspective-ellipse-construction/sssssw0s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perspective-ellipse-construction/sssssw0s"/>
      <lastmod>2026-11-01T20:46:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perspective-ellipse-construction/sssssw0s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perspective-ellipse-construction/sssssw0s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perspective-ellipse-construction/sssssw0s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perspective-ellipse-construction/sssssw0s"/>
      <lastmod>2026-11-01T20:46:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quiz-on-solving-one-step-linear-equations-2/sssssw07</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-on-solving-one-step-linear-equations-2/sssssw07"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-on-solving-one-step-linear-equations-2/sssssw07"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-on-solving-one-step-linear-equations-2/sssssw07"/>
      <lastmod>2026-11-02T00:13:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quiz-on-solving-one-step-linear-equations-2/sssssw07</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-on-solving-one-step-linear-equations-2/sssssw07"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-on-solving-one-step-linear-equations-2/sssssw07"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-on-solving-one-step-linear-equations-2/sssssw07"/>
      <lastmod>2026-11-02T00:13:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rekenrek-for-lz-2-ten-bead-addition-model/sssssw0n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rekenrek-for-lz-2-ten-bead-addition-model/sssssw0n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rekenrek-for-lz-2-ten-bead-addition-model/sssssw0n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rekenrek-for-lz-2-ten-bead-addition-model/sssssw0n"/>
      <lastmod>2026-11-02T15:42:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rekenrek-for-lz-2-ten-bead-addition-model/sssssw0n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rekenrek-for-lz-2-ten-bead-addition-model/sssssw0n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rekenrek-for-lz-2-ten-bead-addition-model/sssssw0n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rekenrek-for-lz-2-ten-bead-addition-model/sssssw0n"/>
      <lastmod>2026-11-02T15:42:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/algebraic-expression-for-rectangle-perimeter/sssssw02</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebraic-expression-for-rectangle-perimeter/sssssw02"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebraic-expression-for-rectangle-perimeter/sssssw02"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebraic-expression-for-rectangle-perimeter/sssssw02"/>
      <lastmod>2026-11-01T21:43:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/algebraic-expression-for-rectangle-perimeter/sssssw02</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebraic-expression-for-rectangle-perimeter/sssssw02"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebraic-expression-for-rectangle-perimeter/sssssw02"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebraic-expression-for-rectangle-perimeter/sssssw02"/>
      <lastmod>2026-11-01T21:43:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/splitting-a-cube-into-pyramids/sssssw0k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/splitting-a-cube-into-pyramids/sssssw0k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/splitting-a-cube-into-pyramids/sssssw0k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/splitting-a-cube-into-pyramids/sssssw0k"/>
      <lastmod>2026-11-02T16:48:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/splitting-a-cube-into-pyramids/sssssw0k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/splitting-a-cube-into-pyramids/sssssw0k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/splitting-a-cube-into-pyramids/sssssw0k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/splitting-a-cube-into-pyramids/sssssw0k"/>
      <lastmod>2026-11-02T16:48:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-regression-models/sssssw0z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-regression-models/sssssw0z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-regression-models/sssssw0z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-regression-models/sssssw0z"/>
      <lastmod>2026-11-02T18:10:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-regression-models/sssssw0z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-regression-models/sssssw0z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-regression-models/sssssw0z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-regression-models/sssssw0z"/>
      <lastmod>2026-11-02T18:10:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylindrical-coordinates-by-mike-martinez/sssssw00</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylindrical-coordinates-by-mike-martinez/sssssw00"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylindrical-coordinates-by-mike-martinez/sssssw00"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylindrical-coordinates-by-mike-martinez/sssssw00"/>
      <lastmod>2026-11-01T21:18:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylindrical-coordinates-by-mike-martinez/sssssw00</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylindrical-coordinates-by-mike-martinez/sssssw00"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylindrical-coordinates-by-mike-martinez/sssssw00"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylindrical-coordinates-by-mike-martinez/sssssw00"/>
      <lastmod>2026-11-01T21:18:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-square-prism-and-pyramid/sssssw0d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-square-prism-and-pyramid/sssssw0d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-square-prism-and-pyramid/sssssw0d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-square-prism-and-pyramid/sssssw0d"/>
      <lastmod>2026-11-01T21:36:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-square-prism-and-pyramid/sssssw0d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-square-prism-and-pyramid/sssssw0d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-square-prism-and-pyramid/sssssw0d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-square-prism-and-pyramid/sssssw0d"/>
      <lastmod>2026-11-01T21:36:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-addition-estimation-practice/sssssw0f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-estimation-practice/sssssw0f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-estimation-practice/sssssw0f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-estimation-practice/sssssw0f"/>
      <lastmod>2026-11-01T21:15:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-addition-estimation-practice/sssssw0f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-estimation-practice/sssssw0f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-estimation-practice/sssssw0f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-estimation-practice/sssssw0f"/>
      <lastmod>2026-11-01T21:15:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-tool/sssssw08</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-tool/sssssw08"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-tool/sssssw08"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-tool/sssssw08"/>
      <lastmod>2026-11-02T13:16:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-tool/sssssw08</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-tool/sssssw08"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-tool/sssssw08"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-tool/sssssw08"/>
      <lastmod>2026-11-02T13:16:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-by-cylindrical-shell/sssssw0u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-by-cylindrical-shell/sssssw0u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-by-cylindrical-shell/sssssw0u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-by-cylindrical-shell/sssssw0u"/>
      <lastmod>2026-11-01T23:54:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-by-cylindrical-shell/sssssw0u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-by-cylindrical-shell/sssssw0u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-by-cylindrical-shell/sssssw0u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-by-cylindrical-shell/sssssw0u"/>
      <lastmod>2026-11-01T23:54:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-regression-isosceles-triangles-geogebra-example/sssssw05</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-regression-isosceles-triangles-geogebra-example/sssssw05"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-regression-isosceles-triangles-geogebra-example/sssssw05"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-regression-isosceles-triangles-geogebra-example/sssssw05"/>
      <lastmod>2026-11-02T09:10:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-regression-isosceles-triangles-geogebra-example/sssssw05</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-regression-isosceles-triangles-geogebra-example/sssssw05"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-regression-isosceles-triangles-geogebra-example/sssssw05"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-regression-isosceles-triangles-geogebra-example/sssssw05"/>
      <lastmod>2026-11-02T09:10:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-volume-formula-exploration-and-solid-geometry-construction/sssssw0b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-volume-formula-exploration-and-solid-geometry-construction/sssssw0b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-volume-formula-exploration-and-solid-geometry-construction/sssssw0b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-volume-formula-exploration-and-solid-geometry-construction/sssssw0b"/>
      <lastmod>2026-11-02T00:40:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-volume-formula-exploration-and-solid-geometry-construction/sssssw0b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-volume-formula-exploration-and-solid-geometry-construction/sssssw0b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-volume-formula-exploration-and-solid-geometry-construction/sssssw0b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-volume-formula-exploration-and-solid-geometry-construction/sssssw0b"/>
      <lastmod>2026-11-02T00:40:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-the-center-of-rotation-by-mbranson/sssssw03</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-the-center-of-rotation-by-mbranson/sssssw03"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-the-center-of-rotation-by-mbranson/sssssw03"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-the-center-of-rotation-by-mbranson/sssssw03"/>
      <lastmod>2026-11-02T11:43:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-the-center-of-rotation-by-mbranson/sssssw03</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-the-center-of-rotation-by-mbranson/sssssw03"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-the-center-of-rotation-by-mbranson/sssssw03"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-the-center-of-rotation-by-mbranson/sssssw03"/>
      <lastmod>2026-11-02T11:43:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equation-of-a-line-through-two-points/sssssw0q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equation-of-a-line-through-two-points/sssssw0q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equation-of-a-line-through-two-points/sssssw0q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equation-of-a-line-through-two-points/sssssw0q"/>
      <lastmod>2026-11-01T23:36:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equation-of-a-line-through-two-points/sssssw0q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equation-of-a-line-through-two-points/sssssw0q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equation-of-a-line-through-two-points/sssssw0q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equation-of-a-line-through-two-points/sssssw0q"/>
      <lastmod>2026-11-01T23:36:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/regular-polygons-and-angles/sssssw01</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-polygons-and-angles/sssssw01"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-polygons-and-angles/sssssw01"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-polygons-and-angles/sssssw01"/>
      <lastmod>2026-11-02T03:06:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/regular-polygons-and-angles/sssssw01</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-polygons-and-angles/sssssw01"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-polygons-and-angles/sssssw01"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-polygons-and-angles/sssssw01"/>
      <lastmod>2026-11-02T03:06:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-7-9-1-lesson-planning-recipes/sssssw0m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-9-1-lesson-planning-recipes/sssssw0m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-9-1-lesson-planning-recipes/sssssw0m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-9-1-lesson-planning-recipes/sssssw0m"/>
      <lastmod>2026-11-01T22:50:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-7-9-1-lesson-planning-recipes/sssssw0m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-9-1-lesson-planning-recipes/sssssw0m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-9-1-lesson-planning-recipes/sssssw0m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-9-1-lesson-planning-recipes/sssssw0m"/>
      <lastmod>2026-11-01T22:50:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/identifying-sides-in-right-triangles/sssssw0j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identifying-sides-in-right-triangles/sssssw0j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identifying-sides-in-right-triangles/sssssw0j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identifying-sides-in-right-triangles/sssssw0j"/>
      <lastmod>2026-11-01T21:40:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/identifying-sides-in-right-triangles/sssssw0j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identifying-sides-in-right-triangles/sssssw0j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identifying-sides-in-right-triangles/sssssw0j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identifying-sides-in-right-triangles/sssssw0j"/>
      <lastmod>2026-11-01T21:40:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angles-between-two-triangular-planes/sssssw0p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-between-two-triangular-planes/sssssw0p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-between-two-triangular-planes/sssssw0p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-between-two-triangular-planes/sssssw0p"/>
      <lastmod>2026-11-02T02:39:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angles-between-two-triangular-planes/sssssw0p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-between-two-triangular-planes/sssssw0p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-between-two-triangular-planes/sssssw0p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-between-two-triangular-planes/sssssw0p"/>
      <lastmod>2026-11-02T02:39:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/relationship-between-central-angles-inscribed-angles-and-their-intercepted-arc/sssssw0w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relationship-between-central-angles-inscribed-angles-and-their-intercepted-arc/sssssw0w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relationship-between-central-angles-inscribed-angles-and-their-intercepted-arc/sssssw0w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relationship-between-central-angles-inscribed-angles-and-their-intercepted-arc/sssssw0w"/>
      <lastmod>2026-11-02T17:45:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/relationship-between-central-angles-inscribed-angles-and-their-intercepted-arc/sssssw0w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relationship-between-central-angles-inscribed-angles-and-their-intercepted-arc/sssssw0w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relationship-between-central-angles-inscribed-angles-and-their-intercepted-arc/sssssw0w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relationship-between-central-angles-inscribed-angles-and-their-intercepted-arc/sssssw0w"/>
      <lastmod>2026-11-02T17:45:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conditional-probability-geometry-interaction-demo/sssssw06</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conditional-probability-geometry-interaction-demo/sssssw06"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conditional-probability-geometry-interaction-demo/sssssw06"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conditional-probability-geometry-interaction-demo/sssssw06"/>
      <lastmod>2026-11-02T18:46:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conditional-probability-geometry-interaction-demo/sssssw06</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conditional-probability-geometry-interaction-demo/sssssw06"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conditional-probability-geometry-interaction-demo/sssssw06"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conditional-probability-geometry-interaction-demo/sssssw06"/>
      <lastmod>2026-11-02T18:46:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-sine-rule-1/sssssw0g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-sine-rule-1/sssssw0g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-sine-rule-1/sssssw0g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-sine-rule-1/sssssw0g"/>
      <lastmod>2026-11-01T23:53:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-sine-rule-1/sssssw0g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-sine-rule-1/sssssw0g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-sine-rule-1/sssssw0g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-sine-rule-1/sssssw0g"/>
      <lastmod>2026-11-01T23:53:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-by-canozcebe/sssssw09</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-by-canozcebe/sssssw09"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-by-canozcebe/sssssw09"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-by-canozcebe/sssssw09"/>
      <lastmod>2026-11-02T08:51:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-by-canozcebe/sssssw09</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-by-canozcebe/sssssw09"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-by-canozcebe/sssssw09"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-by-canozcebe/sssssw09"/>
      <lastmod>2026-11-02T08:51:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a4-to-a0-paper-format-proportions/sssssw0e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a4-to-a0-paper-format-proportions/sssssw0e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a4-to-a0-paper-format-proportions/sssssw0e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a4-to-a0-paper-format-proportions/sssssw0e"/>
      <lastmod>2026-11-02T17:49:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a4-to-a0-paper-format-proportions/sssssw0e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a4-to-a0-paper-format-proportions/sssssw0e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a4-to-a0-paper-format-proportions/sssssw0e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a4-to-a0-paper-format-proportions/sssssw0e"/>
      <lastmod>2026-11-02T17:49:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-illustration-of-square-equilateral-triangle-and-circumcircle-relations/sssssw0v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-square-equilateral-triangle-and-circumcircle-relations/sssssw0v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-square-equilateral-triangle-and-circumcircle-relations/sssssw0v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-square-equilateral-triangle-and-circumcircle-relations/sssssw0v"/>
      <lastmod>2026-11-02T17:10:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-illustration-of-square-equilateral-triangle-and-circumcircle-relations/sssssw0v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-square-equilateral-triangle-and-circumcircle-relations/sssssw0v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-square-equilateral-triangle-and-circumcircle-relations/sssssw0v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-square-equilateral-triangle-and-circumcircle-relations/sssssw0v"/>
      <lastmod>2026-11-02T17:10:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/maximum-cone/sssssw04</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximum-cone/sssssw04"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximum-cone/sssssw04"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximum-cone/sssssw04"/>
      <lastmod>2026-11-02T18:07:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/maximum-cone/sssssw04</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximum-cone/sssssw04"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximum-cone/sssssw04"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximum-cone/sssssw04"/>
      <lastmod>2026-11-02T18:07:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstrating-characteristics-of-polynomial-functions/sssssw0l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-characteristics-of-polynomial-functions/sssssw0l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-characteristics-of-polynomial-functions/sssssw0l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-characteristics-of-polynomial-functions/sssssw0l"/>
      <lastmod>2026-11-02T08:49:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstrating-characteristics-of-polynomial-functions/sssssw0l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-characteristics-of-polynomial-functions/sssssw0l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-characteristics-of-polynomial-functions/sssssw0l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-characteristics-of-polynomial-functions/sssssw0l"/>
      <lastmod>2026-11-02T08:49:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arrow-rotation/sssssw0y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arrow-rotation/sssssw0y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arrow-rotation/sssssw0y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arrow-rotation/sssssw0y"/>
      <lastmod>2026-11-02T15:49:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arrow-rotation/sssssw0y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arrow-rotation/sssssw0y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arrow-rotation/sssssw0y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arrow-rotation/sssssw0y"/>
      <lastmod>2026-11-02T15:49:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construct-a-rectangle-with-geogebra/sssssw0a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-a-rectangle-with-geogebra/sssssw0a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-a-rectangle-with-geogebra/sssssw0a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-a-rectangle-with-geogebra/sssssw0a"/>
      <lastmod>2026-11-02T17:42:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construct-a-rectangle-with-geogebra/sssssw0a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-a-rectangle-with-geogebra/sssssw0a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-a-rectangle-with-geogebra/sssssw0a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-a-rectangle-with-geogebra/sssssw0a"/>
      <lastmod>2026-11-02T17:42:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-multiplication-associativity/sssssw0c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-multiplication-associativity/sssssw0c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-multiplication-associativity/sssssw0c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-multiplication-associativity/sssssw0c"/>
      <lastmod>2026-11-01T23:41:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-multiplication-associativity/sssssw0c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-multiplication-associativity/sssssw0c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-multiplication-associativity/sssssw0c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-multiplication-associativity/sssssw0c"/>
      <lastmod>2026-11-01T23:41:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-to-rectangle-exploration/sssssw0r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-to-rectangle-exploration/sssssw0r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-to-rectangle-exploration/sssssw0r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-to-rectangle-exploration/sssssw0r"/>
      <lastmod>2026-11-02T15:36:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-to-rectangle-exploration/sssssw0r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-to-rectangle-exploration/sssssw0r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-to-rectangle-exploration/sssssw0r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-to-rectangle-exploration/sssssw0r"/>
      <lastmod>2026-11-02T15:36:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotations-in-the-park/sssssw0h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotations-in-the-park/sssssw0h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotations-in-the-park/sssssw0h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotations-in-the-park/sssssw0h"/>
      <lastmod>2026-11-02T16:44:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotations-in-the-park/sssssw0h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotations-in-the-park/sssssw0h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotations-in-the-park/sssssw0h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotations-in-the-park/sssssw0h"/>
      <lastmod>2026-11-02T16:44:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-5-compound/sssssw0t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-5-compound/sssssw0t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-5-compound/sssssw0t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-5-compound/sssssw0t"/>
      <lastmod>2026-11-02T02:30:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-5-compound/sssssw0t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-5-compound/sssssw0t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-5-compound/sssssw0t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-5-compound/sssssw0t"/>
      <lastmod>2026-11-02T02:30:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-function-values/sssssw0x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-function-values/sssssw0x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-function-values/sssssw0x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-function-values/sssssw0x"/>
      <lastmod>2026-11-01T23:24:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-function-values/sssssw0x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-function-values/sssssw0x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-function-values/sssssw0x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-function-values/sssssw0x"/>
      <lastmod>2026-11-01T23:24:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hypotenuse-leg-exploration/sssssw0i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hypotenuse-leg-exploration/sssssw0i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hypotenuse-leg-exploration/sssssw0i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hypotenuse-leg-exploration/sssssw0i"/>
      <lastmod>2026-11-02T03:17:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hypotenuse-leg-exploration/sssssw0i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hypotenuse-leg-exploration/sssssw0i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hypotenuse-leg-exploration/sssssw0i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hypotenuse-leg-exploration/sssssw0i"/>
      <lastmod>2026-11-02T03:17:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-linear-programming-problem/sssssw0o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-linear-programming-problem/sssssw0o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-linear-programming-problem/sssssw0o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-linear-programming-problem/sssssw0o"/>
      <lastmod>2026-11-01T20:43:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-linear-programming-problem/sssssw0o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-linear-programming-problem/sssssw0o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-linear-programming-problem/sssssw0o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-linear-programming-problem/sssssw0o"/>
      <lastmod>2026-11-01T20:43:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-illustration-of-an-exponent-law/ssssswds</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-illustration-of-an-exponent-law/ssssswds"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-illustration-of-an-exponent-law/ssssswds"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-illustration-of-an-exponent-law/ssssswds"/>
      <lastmod>2026-11-02T18:26:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-illustration-of-an-exponent-law/ssssswds</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-illustration-of-an-exponent-law/ssssswds"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-illustration-of-an-exponent-law/ssssswds"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-illustration-of-an-exponent-law/ssssswds"/>
      <lastmod>2026-11-02T18:26:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sampling-and-normal-distribution/ssssswd7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sampling-and-normal-distribution/ssssswd7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sampling-and-normal-distribution/ssssswd7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sampling-and-normal-distribution/ssssswd7"/>
      <lastmod>2026-11-02T18:46:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sampling-and-normal-distribution/ssssswd7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sampling-and-normal-distribution/ssssswd7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sampling-and-normal-distribution/ssssswd7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sampling-and-normal-distribution/ssssswd7"/>
      <lastmod>2026-11-02T18:46:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/describing-large-and-small-numbers-using-powers-of-10-im-8-7-9-lesson/ssssswdn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/describing-large-and-small-numbers-using-powers-of-10-im-8-7-9-lesson/ssssswdn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/describing-large-and-small-numbers-using-powers-of-10-im-8-7-9-lesson/ssssswdn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/describing-large-and-small-numbers-using-powers-of-10-im-8-7-9-lesson/ssssswdn"/>
      <lastmod>2026-11-01T22:52:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/describing-large-and-small-numbers-using-powers-of-10-im-8-7-9-lesson/ssssswdn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/describing-large-and-small-numbers-using-powers-of-10-im-8-7-9-lesson/ssssswdn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/describing-large-and-small-numbers-using-powers-of-10-im-8-7-9-lesson/ssssswdn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/describing-large-and-small-numbers-using-powers-of-10-im-8-7-9-lesson/ssssswdn"/>
      <lastmod>2026-11-01T22:52:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-inequalities-demo-by-chris-thomas/ssssswd2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-demo-by-chris-thomas/ssssswd2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-inequalities-demo-by-chris-thomas/ssssswd2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-demo-by-chris-thomas/ssssswd2"/>
      <lastmod>2026-11-02T13:51:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-inequalities-demo-by-chris-thomas/ssssswd2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-demo-by-chris-thomas/ssssswd2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-inequalities-demo-by-chris-thomas/ssssswd2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-demo-by-chris-thomas/ssssswd2"/>
      <lastmod>2026-11-02T13:51:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-illustration-of-equidistant-chords-in-a-circle/ssssswdk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-equidistant-chords-in-a-circle/ssssswdk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-equidistant-chords-in-a-circle/ssssswdk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-equidistant-chords-in-a-circle/ssssswdk"/>
      <lastmod>2026-11-01T21:46:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-illustration-of-equidistant-chords-in-a-circle/ssssswdk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-equidistant-chords-in-a-circle/ssssswdk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-equidistant-chords-in-a-circle/ssssswdk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-equidistant-chords-in-a-circle/ssssswdk"/>
      <lastmod>2026-11-01T21:46:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a-surface-demonstration/ssssswdz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-surface-demonstration/ssssswdz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-surface-demonstration/ssssswdz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-surface-demonstration/ssssswdz"/>
      <lastmod>2026-11-01T23:31:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a-surface-demonstration/ssssswdz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-surface-demonstration/ssssswdz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-surface-demonstration/ssssswdz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-surface-demonstration/ssssswdz"/>
      <lastmod>2026-11-01T23:31:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pendulum-ar/ssssswd0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pendulum-ar/ssssswd0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pendulum-ar/ssssswd0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pendulum-ar/ssssswd0"/>
      <lastmod>2026-11-01T23:53:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pendulum-ar/ssssswd0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pendulum-ar/ssssswd0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pendulum-ar/ssssswd0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pendulum-ar/ssssswd0"/>
      <lastmod>2026-11-01T23:53:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/length-vs-temperature-square-root-simulation/ssssswdd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/length-vs-temperature-square-root-simulation/ssssswdd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/length-vs-temperature-square-root-simulation/ssssswdd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/length-vs-temperature-square-root-simulation/ssssswdd"/>
      <lastmod>2026-11-02T16:55:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/length-vs-temperature-square-root-simulation/ssssswdd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/length-vs-temperature-square-root-simulation/ssssswdd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/length-vs-temperature-square-root-simulation/ssssswdd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/length-vs-temperature-square-root-simulation/ssssswdd"/>
      <lastmod>2026-11-02T16:55:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/algebra-view/ssssswdf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebra-view/ssssswdf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebra-view/ssssswdf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebra-view/ssssswdf"/>
      <lastmod>2026-11-02T18:26:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/algebra-view/ssssswdf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebra-view/ssssswdf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebra-view/ssssswdf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebra-view/ssssswdf"/>
      <lastmod>2026-11-02T18:26:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-in-a-right-triangle/ssssswd8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-in-a-right-triangle/ssssswd8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-in-a-right-triangle/ssssswd8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-in-a-right-triangle/ssssswd8"/>
      <lastmod>2026-11-02T02:34:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-in-a-right-triangle/ssssswd8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-in-a-right-triangle/ssssswd8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-in-a-right-triangle/ssssswd8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-in-a-right-triangle/ssssswd8"/>
      <lastmod>2026-11-02T02:34:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animation-demonstrating-incircle-and-3d-vectors/ssssswdu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-demonstrating-incircle-and-3d-vectors/ssssswdu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-demonstrating-incircle-and-3d-vectors/ssssswdu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-demonstrating-incircle-and-3d-vectors/ssssswdu"/>
      <lastmod>2026-11-02T18:15:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animation-demonstrating-incircle-and-3d-vectors/ssssswdu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-demonstrating-incircle-and-3d-vectors/ssssswdu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-demonstrating-incircle-and-3d-vectors/ssssswdu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-demonstrating-incircle-and-3d-vectors/ssssswdu"/>
      <lastmod>2026-11-02T18:15:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-directrix/ssssswd5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-directrix/ssssswd5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-directrix/ssssswd5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-directrix/ssssswd5"/>
      <lastmod>2026-11-02T02:50:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-directrix/ssssswd5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-directrix/ssssswd5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-directrix/ssssswd5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-directrix/ssssswd5"/>
      <lastmod>2026-11-02T02:50:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inertia-moment-of-two-rectangles/ssssswdb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inertia-moment-of-two-rectangles/ssssswdb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inertia-moment-of-two-rectangles/ssssswdb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inertia-moment-of-two-rectangles/ssssswdb"/>
      <lastmod>2026-11-01T21:31:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inertia-moment-of-two-rectangles/ssssswdb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inertia-moment-of-two-rectangles/ssssswdb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inertia-moment-of-two-rectangles/ssssswdb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inertia-moment-of-two-rectangles/ssssswdb"/>
      <lastmod>2026-11-01T21:31:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-demonstration-by-saraaoun-and-maryam-mhana/ssssswd3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-demonstration-by-saraaoun-and-maryam-mhana/ssssswd3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-demonstration-by-saraaoun-and-maryam-mhana/ssssswd3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-demonstration-by-saraaoun-and-maryam-mhana/ssssswd3"/>
      <lastmod>2026-11-01T21:35:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-demonstration-by-saraaoun-and-maryam-mhana/ssssswd3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-demonstration-by-saraaoun-and-maryam-mhana/ssssswd3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-demonstration-by-saraaoun-and-maryam-mhana/ssssswd3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-demonstration-by-saraaoun-and-maryam-mhana/ssssswd3"/>
      <lastmod>2026-11-01T21:35:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construct-the-circumscribed-circle-of-a-triangle/ssssswdq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-the-circumscribed-circle-of-a-triangle/ssssswdq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-the-circumscribed-circle-of-a-triangle/ssssswdq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-the-circumscribed-circle-of-a-triangle/ssssswdq"/>
      <lastmod>2026-11-01T21:07:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construct-the-circumscribed-circle-of-a-triangle/ssssswdq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-the-circumscribed-circle-of-a-triangle/ssssswdq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-the-circumscribed-circle-of-a-triangle/ssssswdq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-the-circumscribed-circle-of-a-triangle/ssssswdq"/>
      <lastmod>2026-11-01T21:07:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/android-logo-geometric-construction/ssssswd1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/android-logo-geometric-construction/ssssswd1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/android-logo-geometric-construction/ssssswd1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/android-logo-geometric-construction/ssssswd1"/>
      <lastmod>2026-11-02T02:22:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/android-logo-geometric-construction/ssssswd1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/android-logo-geometric-construction/ssssswd1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/android-logo-geometric-construction/ssssswd1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/android-logo-geometric-construction/ssssswd1"/>
      <lastmod>2026-11-02T02:22:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-primes/ssssswdm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-primes/ssssswdm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-primes/ssssswdm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-primes/ssssswdm"/>
      <lastmod>2026-11-01T20:40:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-primes/ssssswdm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-primes/ssssswdm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-primes/ssssswdm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-primes/ssssswdm"/>
      <lastmod>2026-11-01T20:40:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/p-2-addition-and-subtraction-problem/ssssswdj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p-2-addition-and-subtraction-problem/ssssswdj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p-2-addition-and-subtraction-problem/ssssswdj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p-2-addition-and-subtraction-problem/ssssswdj"/>
      <lastmod>2026-11-01T19:10:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/p-2-addition-and-subtraction-problem/ssssswdj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p-2-addition-and-subtraction-problem/ssssswdj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p-2-addition-and-subtraction-problem/ssssswdj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p-2-addition-and-subtraction-problem/ssssswdj"/>
      <lastmod>2026-11-01T19:10:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-division-a-b-partitive-sssssgkg/ssssswdp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-division-a-b-partitive-sssssgkg/ssssswdp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-division-a-b-partitive-sssssgkg/ssssswdp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-division-a-b-partitive-sssssgkg/ssssswdp"/>
      <lastmod>2026-11-02T12:24:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-division-a-b-partitive-sssssgkg/ssssswdp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-division-a-b-partitive-sssssgkg/ssssswdp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-division-a-b-partitive-sssssgkg/ssssswdp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-division-a-b-partitive-sssssgkg/ssssswdp"/>
      <lastmod>2026-11-02T12:24:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-right-cones-dynamic-geogebra-demo/ssssswdw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-right-cones-dynamic-geogebra-demo/ssssswdw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-right-cones-dynamic-geogebra-demo/ssssswdw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-right-cones-dynamic-geogebra-demo/ssssswdw"/>
      <lastmod>2026-11-02T18:17:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-right-cones-dynamic-geogebra-demo/ssssswdw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-right-cones-dynamic-geogebra-demo/ssssswdw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-right-cones-dynamic-geogebra-demo/ssssswdw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-right-cones-dynamic-geogebra-demo/ssssswdw"/>
      <lastmod>2026-11-02T18:17:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conic-tracing-dynamic-construction-of-parabola-ellipse-and-hyperbola/ssssswd6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-tracing-dynamic-construction-of-parabola-ellipse-and-hyperbola/ssssswd6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-tracing-dynamic-construction-of-parabola-ellipse-and-hyperbola/ssssswd6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-tracing-dynamic-construction-of-parabola-ellipse-and-hyperbola/ssssswd6"/>
      <lastmod>2026-11-02T09:35:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conic-tracing-dynamic-construction-of-parabola-ellipse-and-hyperbola/ssssswd6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-tracing-dynamic-construction-of-parabola-ellipse-and-hyperbola/ssssswd6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-tracing-dynamic-construction-of-parabola-ellipse-and-hyperbola/ssssswd6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-tracing-dynamic-construction-of-parabola-ellipse-and-hyperbola/ssssswd6"/>
      <lastmod>2026-11-02T09:35:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/three-overlapping-squares-on-screen/ssssswdg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-overlapping-squares-on-screen/ssssswdg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-overlapping-squares-on-screen/ssssswdg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-overlapping-squares-on-screen/ssssswdg"/>
      <lastmod>2026-11-01T21:55:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/three-overlapping-squares-on-screen/ssssswdg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-overlapping-squares-on-screen/ssssswdg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-overlapping-squares-on-screen/ssssswdg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-overlapping-squares-on-screen/ssssswdg"/>
      <lastmod>2026-11-01T21:55:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-of-a-right-triangle/ssssswd9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-right-triangle/ssssswd9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-right-triangle/ssssswd9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-right-triangle/ssssswd9"/>
      <lastmod>2026-11-02T09:29:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-of-a-right-triangle/ssssswd9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-right-triangle/ssssswd9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-right-triangle/ssssswd9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-right-triangle/ssssswd9"/>
      <lastmod>2026-11-02T09:29:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equilateral-triangle-and-normal-distribution-visualization/ssssswde</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equilateral-triangle-and-normal-distribution-visualization/ssssswde"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equilateral-triangle-and-normal-distribution-visualization/ssssswde"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equilateral-triangle-and-normal-distribution-visualization/ssssswde"/>
      <lastmod>2026-11-02T02:26:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equilateral-triangle-and-normal-distribution-visualization/ssssswde</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equilateral-triangle-and-normal-distribution-visualization/ssssswde"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equilateral-triangle-and-normal-distribution-visualization/ssssswde"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equilateral-triangle-and-normal-distribution-visualization/ssssswde"/>
      <lastmod>2026-11-02T02:26:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-illustration-of-similar-rectangles/ssssswdv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-similar-rectangles/ssssswdv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-similar-rectangles/ssssswdv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-similar-rectangles/ssssswdv"/>
      <lastmod>2026-11-02T18:14:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-illustration-of-similar-rectangles/ssssswdv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-similar-rectangles/ssssswdv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-similar-rectangles/ssssswdv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-similar-rectangles/ssssswdv"/>
      <lastmod>2026-11-02T18:14:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exact-differential-equation/ssssswd4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exact-differential-equation/ssssswd4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exact-differential-equation/ssssswd4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exact-differential-equation/ssssswd4"/>
      <lastmod>2026-11-02T09:29:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exact-differential-equation/ssssswd4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exact-differential-equation/ssssswd4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exact-differential-equation/ssssswd4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exact-differential-equation/ssssswd4"/>
      <lastmod>2026-11-02T09:29:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sequences-of-rigid-transformations-translation-reflection-and-rotation/ssssswdl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sequences-of-rigid-transformations-translation-reflection-and-rotation/ssssswdl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sequences-of-rigid-transformations-translation-reflection-and-rotation/ssssswdl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sequences-of-rigid-transformations-translation-reflection-and-rotation/ssssswdl"/>
      <lastmod>2026-11-01T21:17:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sequences-of-rigid-transformations-translation-reflection-and-rotation/ssssswdl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sequences-of-rigid-transformations-translation-reflection-and-rotation/ssssswdl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sequences-of-rigid-transformations-translation-reflection-and-rotation/ssssswdl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sequences-of-rigid-transformations-translation-reflection-and-rotation/ssssswdl"/>
      <lastmod>2026-11-01T21:17:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sa-prism/ssssswdy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sa-prism/ssssswdy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sa-prism/ssssswdy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sa-prism/ssssswdy"/>
      <lastmod>2026-11-02T18:59:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sa-prism/ssssswdy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sa-prism/ssssswdy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sa-prism/ssssswdy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sa-prism/ssssswdy"/>
      <lastmod>2026-11-02T18:59:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-demonstration-of-geometry-and-vectors/ssssswda</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-demonstration-of-geometry-and-vectors/ssssswda"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-demonstration-of-geometry-and-vectors/ssssswda"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-demonstration-of-geometry-and-vectors/ssssswda"/>
      <lastmod>2026-11-02T15:48:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-demonstration-of-geometry-and-vectors/ssssswda</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-demonstration-of-geometry-and-vectors/ssssswda"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-demonstration-of-geometry-and-vectors/ssssswda"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-demonstration-of-geometry-and-vectors/ssssswda"/>
      <lastmod>2026-11-02T15:48:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-a-circle-to-form-a-sphere-3d-geometry-in-geogebra/ssssswdc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-a-circle-to-form-a-sphere-3d-geometry-in-geogebra/ssssswdc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-a-circle-to-form-a-sphere-3d-geometry-in-geogebra/ssssswdc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-a-circle-to-form-a-sphere-3d-geometry-in-geogebra/ssssswdc"/>
      <lastmod>2026-11-01T19:22:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-a-circle-to-form-a-sphere-3d-geometry-in-geogebra/ssssswdc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-a-circle-to-form-a-sphere-3d-geometry-in-geogebra/ssssswdc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-a-circle-to-form-a-sphere-3d-geometry-in-geogebra/ssssswdc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-a-circle-to-form-a-sphere-3d-geometry-in-geogebra/ssssswdc"/>
      <lastmod>2026-11-01T19:22:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cycles-of-5-numbers-curiosities/ssssswdr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cycles-of-5-numbers-curiosities/ssssswdr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cycles-of-5-numbers-curiosities/ssssswdr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cycles-of-5-numbers-curiosities/ssssswdr"/>
      <lastmod>2026-11-02T17:54:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cycles-of-5-numbers-curiosities/ssssswdr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cycles-of-5-numbers-curiosities/ssssswdr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cycles-of-5-numbers-curiosities/ssssswdr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cycles-of-5-numbers-curiosities/ssssswdr"/>
      <lastmod>2026-11-02T17:54:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/composite-figure-construction-template/ssssswdh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/composite-figure-construction-template/ssssswdh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/composite-figure-construction-template/ssssswdh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/composite-figure-construction-template/ssssswdh"/>
      <lastmod>2026-11-01T21:53:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/composite-figure-construction-template/ssssswdh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/composite-figure-construction-template/ssssswdh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/composite-figure-construction-template/ssssswdh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/composite-figure-construction-template/ssssswdh"/>
      <lastmod>2026-11-01T21:53:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-explorer/ssssswdt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-explorer/ssssswdt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-explorer/ssssswdt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-explorer/ssssswdt"/>
      <lastmod>2026-11-02T13:35:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-explorer/ssssswdt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-explorer/ssssswdt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-explorer/ssssswdt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-explorer/ssssswdt"/>
      <lastmod>2026-11-02T13:35:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-shifts/ssssswdx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-shifts/ssssswdx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-shifts/ssssswdx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-shifts/ssssswdx"/>
      <lastmod>2026-11-02T13:15:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-shifts/ssssswdx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-shifts/ssssswdx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-shifts/ssssswdx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-shifts/ssssswdx"/>
      <lastmod>2026-11-02T13:15:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/estimating-the-derivative-of-ccd-de-at-0-with-h-0/ssssswdi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimating-the-derivative-of-ccd-de-at-0-with-h-0/ssssswdi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimating-the-derivative-of-ccd-de-at-0-with-h-0/ssssswdi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimating-the-derivative-of-ccd-de-at-0-with-h-0/ssssswdi"/>
      <lastmod>2026-11-02T08:54:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/estimating-the-derivative-of-ccd-de-at-0-with-h-0/ssssswdi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/estimating-the-derivative-of-ccd-de-at-0-with-h-0/ssssswdi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/estimating-the-derivative-of-ccd-de-at-0-with-h-0/ssssswdi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/estimating-the-derivative-of-ccd-de-at-0-with-h-0/ssssswdi"/>
      <lastmod>2026-11-02T08:54:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezium-properties-demo/ssssswdo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-properties-demo/ssssswdo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-properties-demo/ssssswdo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-properties-demo/ssssswdo"/>
      <lastmod>2026-11-02T09:08:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezium-properties-demo/ssssswdo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-properties-demo/ssssswdo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-properties-demo/ssssswdo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-properties-demo/ssssswdo"/>
      <lastmod>2026-11-02T09:08:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/compare-fractions-by-far-z/ssssswfs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-fractions-by-far-z/ssssswfs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-fractions-by-far-z/ssssswfs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-fractions-by-far-z/ssssswfs"/>
      <lastmod>2026-11-02T17:50:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/compare-fractions-by-far-z/ssssswfs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-fractions-by-far-z/ssssswfs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-fractions-by-far-z/ssssswfs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-fractions-by-far-z/ssssswfs"/>
      <lastmod>2026-11-02T17:50:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modeling-fractions-and-decimals/ssssswf7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modeling-fractions-and-decimals/ssssswf7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modeling-fractions-and-decimals/ssssswf7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modeling-fractions-and-decimals/ssssswf7"/>
      <lastmod>2026-11-02T17:03:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modeling-fractions-and-decimals/ssssswf7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modeling-fractions-and-decimals/ssssswf7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modeling-fractions-and-decimals/ssssswf7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modeling-fractions-and-decimals/ssssswf7"/>
      <lastmod>2026-11-02T17:03:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-geometric-model-for-conditional-probability/ssssswfn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-geometric-model-for-conditional-probability/ssssswfn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-geometric-model-for-conditional-probability/ssssswfn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-geometric-model-for-conditional-probability/ssssswfn"/>
      <lastmod>2026-11-02T17:58:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-geometric-model-for-conditional-probability/ssssswfn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-geometric-model-for-conditional-probability/ssssswfn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-geometric-model-for-conditional-probability/ssssswfn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-geometric-model-for-conditional-probability/ssssswfn"/>
      <lastmod>2026-11-02T17:58:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exercise-5-random-quadrilateral/ssssswf2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-5-random-quadrilateral/ssssswf2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-5-random-quadrilateral/ssssswf2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-5-random-quadrilateral/ssssswf2"/>
      <lastmod>2026-11-02T15:07:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exercise-5-random-quadrilateral/ssssswf2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exercise-5-random-quadrilateral/ssssswf2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exercise-5-random-quadrilateral/ssssswf2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exercise-5-random-quadrilateral/ssssswf2"/>
      <lastmod>2026-11-02T15:07:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/what-is-congruence-sas/ssssswfk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/what-is-congruence-sas/ssssswfk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/what-is-congruence-sas/ssssswfk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/what-is-congruence-sas/ssssswfk"/>
      <lastmod>2026-11-01T23:26:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/what-is-congruence-sas/ssssswfk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/what-is-congruence-sas/ssssswfk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/what-is-congruence-sas/ssssswfk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/what-is-congruence-sas/ssssswfk"/>
      <lastmod>2026-11-01T23:26:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/maths-and-textiles-jacquard-pattern-construction/ssssswfz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maths-and-textiles-jacquard-pattern-construction/ssssswfz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maths-and-textiles-jacquard-pattern-construction/ssssswfz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maths-and-textiles-jacquard-pattern-construction/ssssswfz"/>
      <lastmod>2026-11-01T19:18:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/maths-and-textiles-jacquard-pattern-construction/ssssswfz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maths-and-textiles-jacquard-pattern-construction/ssssswfz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maths-and-textiles-jacquard-pattern-construction/ssssswfz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maths-and-textiles-jacquard-pattern-construction/ssssswfz"/>
      <lastmod>2026-11-01T19:18:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-construction-and-properties/ssssswf0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-construction-and-properties/ssssswf0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-construction-and-properties/ssssswf0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-construction-and-properties/ssssswf0"/>
      <lastmod>2026-11-01T19:17:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-construction-and-properties/ssssswf0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-construction-and-properties/ssssswf0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-construction-and-properties/ssssswf0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-construction-and-properties/ssssswf0"/>
      <lastmod>2026-11-01T19:17:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-property-exploration/ssssswfd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-property-exploration/ssssswfd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-property-exploration/ssssswfd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-property-exploration/ssssswfd"/>
      <lastmod>2026-11-01T21:28:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-property-exploration/ssssswfd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-property-exploration/ssssswfd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-property-exploration/ssssswfd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-property-exploration/ssssswfd"/>
      <lastmod>2026-11-01T21:28:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prism-construction-by-pheebz/ssssswff</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-construction-by-pheebz/ssssswff"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-construction-by-pheebz/ssssswff"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-construction-by-pheebz/ssssswff"/>
      <lastmod>2026-11-02T18:16:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prism-construction-by-pheebz/ssssswff</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-construction-by-pheebz/ssssswff"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-construction-by-pheebz/ssssswff"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-construction-by-pheebz/ssssswff"/>
      <lastmod>2026-11-02T18:16:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lazy-lizard/ssssswf8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lazy-lizard/ssssswf8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lazy-lizard/ssssswf8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lazy-lizard/ssssswf8"/>
      <lastmod>2026-11-01T20:41:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lazy-lizard/ssssswf8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lazy-lizard/ssssswf8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lazy-lizard/ssssswf8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lazy-lizard/ssssswf8"/>
      <lastmod>2026-11-01T20:41:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gogeometry-action-134/ssssswfu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gogeometry-action-134/ssssswfu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gogeometry-action-134/ssssswfu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gogeometry-action-134/ssssswfu"/>
      <lastmod>2026-11-02T18:37:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gogeometry-action-134/ssssswfu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gogeometry-action-134/ssssswfu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gogeometry-action-134/ssssswfu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gogeometry-action-134/ssssswfu"/>
      <lastmod>2026-11-02T18:37:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-and-cosine-ratios-by-jason-l-bouffard/ssssswf5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-and-cosine-ratios-by-jason-l-bouffard/ssssswf5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-and-cosine-ratios-by-jason-l-bouffard/ssssswf5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-and-cosine-ratios-by-jason-l-bouffard/ssssswf5"/>
      <lastmod>2026-11-02T17:38:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-and-cosine-ratios-by-jason-l-bouffard/ssssswf5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-and-cosine-ratios-by-jason-l-bouffard/ssssswf5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-and-cosine-ratios-by-jason-l-bouffard/ssssswf5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-and-cosine-ratios-by-jason-l-bouffard/ssssswf5"/>
      <lastmod>2026-11-02T17:38:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-volume-surface-area-practice-by-terry-lee-lindenmuth/ssssswfb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-volume-surface-area-practice-by-terry-lee-lindenmuth/ssssswfb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-volume-surface-area-practice-by-terry-lee-lindenmuth/ssssswfb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-volume-surface-area-practice-by-terry-lee-lindenmuth/ssssswfb"/>
      <lastmod>2026-11-02T16:56:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-volume-surface-area-practice-by-terry-lee-lindenmuth/ssssswfb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-volume-surface-area-practice-by-terry-lee-lindenmuth/ssssswfb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-volume-surface-area-practice-by-terry-lee-lindenmuth/ssssswfb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-volume-surface-area-practice-by-terry-lee-lindenmuth/ssssswfb"/>
      <lastmod>2026-11-02T16:56:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/horizontal-and-vertical-lines/ssssswf3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-and-vertical-lines/ssssswf3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-and-vertical-lines/ssssswf3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-and-vertical-lines/ssssswf3"/>
      <lastmod>2026-11-01T23:37:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/horizontal-and-vertical-lines/ssssswf3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-and-vertical-lines/ssssswf3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-and-vertical-lines/ssssswf3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-and-vertical-lines/ssssswf3"/>
      <lastmod>2026-11-01T23:37:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-hyperbola/ssssswfq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-hyperbola/ssssswfq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-hyperbola/ssssswfq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-hyperbola/ssssswfq"/>
      <lastmod>2026-11-02T18:15:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-hyperbola/ssssswfq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-hyperbola/ssssswfq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-hyperbola/ssssswfq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-hyperbola/ssssswfq"/>
      <lastmod>2026-11-02T18:15:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perimeter-of-shape-t/ssssswf1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-of-shape-t/ssssswf1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-of-shape-t/ssssswf1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-of-shape-t/ssssswf1"/>
      <lastmod>2026-11-02T12:12:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perimeter-of-shape-t/ssssswf1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-of-shape-t/ssssswf1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-of-shape-t/ssssswf1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-of-shape-t/ssssswf1"/>
      <lastmod>2026-11-02T12:12:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadric-best-fit-through-9-points/ssssswfm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadric-best-fit-through-9-points/ssssswfm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadric-best-fit-through-9-points/ssssswfm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadric-best-fit-through-9-points/ssssswfm"/>
      <lastmod>2026-11-01T23:29:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadric-best-fit-through-9-points/ssssswfm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadric-best-fit-through-9-points/ssssswfm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadric-best-fit-through-9-points/ssssswfm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadric-best-fit-through-9-points/ssssswfm"/>
      <lastmod>2026-11-01T23:29:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-translations-on-a-coordinate-grid-by-debbie-steffen/ssssswfj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-translations-on-a-coordinate-grid-by-debbie-steffen/ssssswfj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-translations-on-a-coordinate-grid-by-debbie-steffen/ssssswfj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-translations-on-a-coordinate-grid-by-debbie-steffen/ssssswfj"/>
      <lastmod>2026-11-02T02:40:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-translations-on-a-coordinate-grid-by-debbie-steffen/ssssswfj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-translations-on-a-coordinate-grid-by-debbie-steffen/ssssswfj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-translations-on-a-coordinate-grid-by-debbie-steffen/ssssswfj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-translations-on-a-coordinate-grid-by-debbie-steffen/ssssswfj"/>
      <lastmod>2026-11-02T02:40:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-calculator/ssssswfp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-calculator/ssssswfp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-calculator/ssssswfp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-calculator/ssssswfp"/>
      <lastmod>2026-11-01T20:52:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-calculator/ssssswfp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-calculator/ssssswfp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-calculator/ssssswfp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-calculator/ssssswfp"/>
      <lastmod>2026-11-01T20:52:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/number-line-subtraction-demo/ssssswfw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-line-subtraction-demo/ssssswfw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-line-subtraction-demo/ssssswfw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-line-subtraction-demo/ssssswfw"/>
      <lastmod>2026-11-02T18:29:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/number-line-subtraction-demo/ssssswfw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/number-line-subtraction-demo/ssssswfw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/number-line-subtraction-demo/ssssswfw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/number-line-subtraction-demo/ssssswfw"/>
      <lastmod>2026-11-02T18:29:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-experimental-and-theoretical-probability/ssssswf6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-experimental-and-theoretical-probability/ssssswf6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-experimental-and-theoretical-probability/ssssswf6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-experimental-and-theoretical-probability/ssssswf6"/>
      <lastmod>2026-11-02T16:34:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-experimental-and-theoretical-probability/ssssswf6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-experimental-and-theoretical-probability/ssssswf6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-experimental-and-theoretical-probability/ssssswf6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-experimental-and-theoretical-probability/ssssswf6"/>
      <lastmod>2026-11-02T16:34:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ptolemy-s-theorem-demonstration/ssssswfg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ptolemy-s-theorem-demonstration/ssssswfg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ptolemy-s-theorem-demonstration/ssssswfg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ptolemy-s-theorem-demonstration/ssssswfg"/>
      <lastmod>2026-11-01T23:44:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ptolemy-s-theorem-demonstration/ssssswfg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ptolemy-s-theorem-demonstration/ssssswfg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ptolemy-s-theorem-demonstration/ssssswfg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ptolemy-s-theorem-demonstration/ssssswfg"/>
      <lastmod>2026-11-01T23:44:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/metallic-ratios-regular-polygon-spirals/ssssswf9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/metallic-ratios-regular-polygon-spirals/ssssswf9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/metallic-ratios-regular-polygon-spirals/ssssswf9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/metallic-ratios-regular-polygon-spirals/ssssswf9"/>
      <lastmod>2026-11-01T23:32:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/metallic-ratios-regular-polygon-spirals/ssssswf9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/metallic-ratios-regular-polygon-spirals/ssssswf9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/metallic-ratios-regular-polygon-spirals/ssssswf9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/metallic-ratios-regular-polygon-spirals/ssssswf9"/>
      <lastmod>2026-11-01T23:32:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angles-in-a-regular-octagon/ssssswfe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-in-a-regular-octagon/ssssswfe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-in-a-regular-octagon/ssssswfe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-in-a-regular-octagon/ssssswfe"/>
      <lastmod>2026-11-02T18:36:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angles-in-a-regular-octagon/ssssswfe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-in-a-regular-octagon/ssssswfe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-in-a-regular-octagon/ssssswfe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-in-a-regular-octagon/ssssswfe"/>
      <lastmod>2026-11-02T18:36:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/compare-two-numbers/ssssswfv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-two-numbers/ssssswfv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-two-numbers/ssssswfv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-two-numbers/ssssswfv"/>
      <lastmod>2026-11-02T16:42:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/compare-two-numbers/ssssswfv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-two-numbers/ssssswfv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-two-numbers/ssssswfv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-two-numbers/ssssswfv"/>
      <lastmod>2026-11-02T16:42:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/year-9-right-circular-cone/ssssswf4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/year-9-right-circular-cone/ssssswf4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/year-9-right-circular-cone/ssssswf4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/year-9-right-circular-cone/ssssswf4"/>
      <lastmod>2026-11-01T19:06:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/year-9-right-circular-cone/ssssswf4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/year-9-right-circular-cone/ssssswf4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/year-9-right-circular-cone/ssssswf4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/year-9-right-circular-cone/ssssswf4"/>
      <lastmod>2026-11-01T19:06:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/investigating-parabolas-does-he-make-it/ssssswfl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-parabolas-does-he-make-it/ssssswfl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-parabolas-does-he-make-it/ssssswfl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-parabolas-does-he-make-it/ssssswfl"/>
      <lastmod>2026-11-01T23:16:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/investigating-parabolas-does-he-make-it/ssssswfl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-parabolas-does-he-make-it/ssssswfl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-parabolas-does-he-make-it/ssssswfl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-parabolas-does-he-make-it/ssssswfl"/>
      <lastmod>2026-11-01T23:16:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/clustered-circles-with-single-intersection-points-veu110/ssssswfy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/clustered-circles-with-single-intersection-points-veu110/ssssswfy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/clustered-circles-with-single-intersection-points-veu110/ssssswfy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/clustered-circles-with-single-intersection-points-veu110/ssssswfy"/>
      <lastmod>2026-11-01T21:16:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/clustered-circles-with-single-intersection-points-veu110/ssssswfy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/clustered-circles-with-single-intersection-points-veu110/ssssswfy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/clustered-circles-with-single-intersection-points-veu110/ssssswfy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/clustered-circles-with-single-intersection-points-veu110/ssssswfy"/>
      <lastmod>2026-11-01T21:16:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a-family-of-linear-functions/ssssswfa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-family-of-linear-functions/ssssswfa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-family-of-linear-functions/ssssswfa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-family-of-linear-functions/ssssswfa"/>
      <lastmod>2026-11-01T20:57:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a-family-of-linear-functions/ssssswfa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-family-of-linear-functions/ssssswfa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-family-of-linear-functions/ssssswfa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-family-of-linear-functions/ssssswfa"/>
      <lastmod>2026-11-01T20:57:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/index-multiplication-demo/ssssswfc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/index-multiplication-demo/ssssswfc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/index-multiplication-demo/ssssswfc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/index-multiplication-demo/ssssswfc"/>
      <lastmod>2026-11-02T02:26:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/index-multiplication-demo/ssssswfc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/index-multiplication-demo/ssssswfc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/index-multiplication-demo/ssssswfc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/index-multiplication-demo/ssssswfc"/>
      <lastmod>2026-11-02T02:26:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/robot-steiner-points/ssssswfr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/robot-steiner-points/ssssswfr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/robot-steiner-points/ssssswfr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/robot-steiner-points/ssssswfr"/>
      <lastmod>2026-11-01T23:54:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/robot-steiner-points/ssssswfr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/robot-steiner-points/ssssswfr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/robot-steiner-points/ssssswfr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/robot-steiner-points/ssssswfr"/>
      <lastmod>2026-11-01T23:54:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-construction/ssssswfh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-construction/ssssswfh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-construction/ssssswfh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-construction/ssssswfh"/>
      <lastmod>2026-11-02T12:07:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-construction/ssssswfh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-construction/ssssswfh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-construction/ssssswfh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-construction/ssssswfh"/>
      <lastmod>2026-11-02T12:07:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/histogram-by-it-for-change/ssssswft</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-by-it-for-change/ssssswft"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-by-it-for-change/ssssswft"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-by-it-for-change/ssssswft"/>
      <lastmod>2026-11-02T07:10:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/histogram-by-it-for-change/ssssswft</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-by-it-for-change/ssssswft"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-by-it-for-change/ssssswft"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-by-it-for-change/ssssswft"/>
      <lastmod>2026-11-02T07:10:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/combine-like-terms-quiz/ssssswfx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/combine-like-terms-quiz/ssssswfx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/combine-like-terms-quiz/ssssswfx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/combine-like-terms-quiz/ssssswfx"/>
      <lastmod>2026-11-02T18:47:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/combine-like-terms-quiz/ssssswfx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/combine-like-terms-quiz/ssssswfx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/combine-like-terms-quiz/ssssswfx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/combine-like-terms-quiz/ssssswfx"/>
      <lastmod>2026-11-02T18:47:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-investigation-dynamic-triangle-transformation-with-vectors/ssssswfi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-investigation-dynamic-triangle-transformation-with-vectors/ssssswfi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-investigation-dynamic-triangle-transformation-with-vectors/ssssswfi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-investigation-dynamic-triangle-transformation-with-vectors/ssssswfi"/>
      <lastmod>2026-11-02T00:35:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-investigation-dynamic-triangle-transformation-with-vectors/ssssswfi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-investigation-dynamic-triangle-transformation-with-vectors/ssssswfi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-investigation-dynamic-triangle-transformation-with-vectors/ssssswfi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-investigation-dynamic-triangle-transformation-with-vectors/ssssswfi"/>
      <lastmod>2026-11-02T00:35:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-around-points-example-17/ssssswfo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-around-points-example-17/ssssswfo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-around-points-example-17/ssssswfo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-around-points-example-17/ssssswfo"/>
      <lastmod>2026-11-02T18:32:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-around-points-example-17/ssssswfo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-around-points-example-17/ssssswfo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-around-points-example-17/ssssswfo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-around-points-example-17/ssssswfo"/>
      <lastmod>2026-11-02T18:32:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-equations-with-exponents/sssssw8s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-equations-with-exponents/sssssw8s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-equations-with-exponents/sssssw8s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-equations-with-exponents/sssssw8s"/>
      <lastmod>2026-11-02T16:33:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-equations-with-exponents/sssssw8s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-equations-with-exponents/sssssw8s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-equations-with-exponents/sssssw8s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-equations-with-exponents/sssssw8s"/>
      <lastmod>2026-11-02T16:33:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-translations-with-matrices/sssssw87</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-translations-with-matrices/sssssw87"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-translations-with-matrices/sssssw87"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-translations-with-matrices/sssssw87"/>
      <lastmod>2026-11-01T23:52:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-translations-with-matrices/sssssw87</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-translations-with-matrices/sssssw87"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-translations-with-matrices/sssssw87"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-translations-with-matrices/sssssw87"/>
      <lastmod>2026-11-01T23:52:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/connections-between-points/sssssw8n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connections-between-points/sssssw8n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connections-between-points/sssssw8n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connections-between-points/sssssw8n"/>
      <lastmod>2026-11-02T16:54:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/connections-between-points/sssssw8n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connections-between-points/sssssw8n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connections-between-points/sssssw8n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connections-between-points/sssssw8n"/>
      <lastmod>2026-11-02T16:54:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-revolution-disc-method/sssssw82</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-disc-method/sssssw82"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-disc-method/sssssw82"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-disc-method/sssssw82"/>
      <lastmod>2026-11-02T02:23:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-revolution-disc-method/sssssw82</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-disc-method/sssssw82"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-disc-method/sssssw82"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-disc-method/sssssw82"/>
      <lastmod>2026-11-02T02:23:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/momentum-vector-sum-3/sssssw8k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/momentum-vector-sum-3/sssssw8k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/momentum-vector-sum-3/sssssw8k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/momentum-vector-sum-3/sssssw8k"/>
      <lastmod>2026-11-02T02:59:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/momentum-vector-sum-3/sssssw8k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/momentum-vector-sum-3/sssssw8k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/momentum-vector-sum-3/sssssw8k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/momentum-vector-sum-3/sssssw8k"/>
      <lastmod>2026-11-02T02:59:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/disc-ness-of-cylinders/sssssw8z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/disc-ness-of-cylinders/sssssw8z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/disc-ness-of-cylinders/sssssw8z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/disc-ness-of-cylinders/sssssw8z"/>
      <lastmod>2026-11-01T23:54:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/disc-ness-of-cylinders/sssssw8z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/disc-ness-of-cylinders/sssssw8z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/disc-ness-of-cylinders/sssssw8z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/disc-ness-of-cylinders/sssssw8z"/>
      <lastmod>2026-11-01T23:54:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-polynomial-functions/sssssw80</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-polynomial-functions/sssssw80"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-polynomial-functions/sssssw80"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-polynomial-functions/sssssw80"/>
      <lastmod>2026-11-02T02:42:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-of-polynomial-functions/sssssw80</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-polynomial-functions/sssssw80"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-polynomial-functions/sssssw80"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-polynomial-functions/sssssw80"/>
      <lastmod>2026-11-02T02:42:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-demo-0-90-degrees/sssssw8d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-demo-0-90-degrees/sssssw8d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-demo-0-90-degrees/sssssw8d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-demo-0-90-degrees/sssssw8d"/>
      <lastmod>2026-11-01T23:19:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-demo-0-90-degrees/sssssw8d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-demo-0-90-degrees/sssssw8d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-demo-0-90-degrees/sssssw8d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-demo-0-90-degrees/sssssw8d"/>
      <lastmod>2026-11-01T23:19:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/decadic-logarithm-function-graph-demo/sssssw8f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decadic-logarithm-function-graph-demo/sssssw8f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decadic-logarithm-function-graph-demo/sssssw8f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decadic-logarithm-function-graph-demo/sssssw8f"/>
      <lastmod>2026-11-02T18:00:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/decadic-logarithm-function-graph-demo/sssssw8f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decadic-logarithm-function-graph-demo/sssssw8f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decadic-logarithm-function-graph-demo/sssssw8f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decadic-logarithm-function-graph-demo/sssssw8f"/>
      <lastmod>2026-11-02T18:00:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/central-limit-theorem/sssssw88</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/central-limit-theorem/sssssw88"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/central-limit-theorem/sssssw88"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/central-limit-theorem/sssssw88"/>
      <lastmod>2026-11-01T19:19:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/central-limit-theorem/sssssw88</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/central-limit-theorem/sssssw88"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/central-limit-theorem/sssssw88"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/central-limit-theorem/sssssw88"/>
      <lastmod>2026-11-01T19:19:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conic-sections-demo-by-mtzoumas/sssssw8u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-sections-demo-by-mtzoumas/sssssw8u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-sections-demo-by-mtzoumas/sssssw8u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-demo-by-mtzoumas/sssssw8u"/>
      <lastmod>2026-11-02T16:35:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conic-sections-demo-by-mtzoumas/sssssw8u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-sections-demo-by-mtzoumas/sssssw8u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-sections-demo-by-mtzoumas/sssssw8u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-demo-by-mtzoumas/sssssw8u"/>
      <lastmod>2026-11-02T16:35:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/why-are-right-triangles-special-finding-angles/sssssw85</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/why-are-right-triangles-special-finding-angles/sssssw85"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/why-are-right-triangles-special-finding-angles/sssssw85"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/why-are-right-triangles-special-finding-angles/sssssw85"/>
      <lastmod>2026-11-02T09:34:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/why-are-right-triangles-special-finding-angles/sssssw85</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/why-are-right-triangles-special-finding-angles/sssssw85"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/why-are-right-triangles-special-finding-angles/sssssw85"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/why-are-right-triangles-special-finding-angles/sssssw85"/>
      <lastmod>2026-11-02T09:34:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tutorial-on-designing-interactivity-in-the-time-line-tool/sssssw8b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tutorial-on-designing-interactivity-in-the-time-line-tool/sssssw8b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tutorial-on-designing-interactivity-in-the-time-line-tool/sssssw8b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tutorial-on-designing-interactivity-in-the-time-line-tool/sssssw8b"/>
      <lastmod>2026-11-01T23:18:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tutorial-on-designing-interactivity-in-the-time-line-tool/sssssw8b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tutorial-on-designing-interactivity-in-the-time-line-tool/sssssw8b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tutorial-on-designing-interactivity-in-the-time-line-tool/sssssw8b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tutorial-on-designing-interactivity-in-the-time-line-tool/sssssw8b"/>
      <lastmod>2026-11-01T23:18:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-s-standard-equation-demo/sssssw83</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-s-standard-equation-demo/sssssw83"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-s-standard-equation-demo/sssssw83"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-s-standard-equation-demo/sssssw83"/>
      <lastmod>2026-11-02T18:59:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-s-standard-equation-demo/sssssw83</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-s-standard-equation-demo/sssssw83"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-s-standard-equation-demo/sssssw83"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-s-standard-equation-demo/sssssw83"/>
      <lastmod>2026-11-02T18:59:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-similarity/sssssw8q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-similarity/sssssw8q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-similarity/sssssw8q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-similarity/sssssw8q"/>
      <lastmod>2026-11-01T20:48:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-similarity/sssssw8q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-similarity/sssssw8q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-similarity/sssssw8q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-similarity/sssssw8q"/>
      <lastmod>2026-11-01T20:48:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygon-angle-theorems-triangle-to-octagon/sssssw81</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-angle-theorems-triangle-to-octagon/sssssw81"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-angle-theorems-triangle-to-octagon/sssssw81"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-angle-theorems-triangle-to-octagon/sssssw81"/>
      <lastmod>2026-11-01T19:08:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygon-angle-theorems-triangle-to-octagon/sssssw81</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-angle-theorems-triangle-to-octagon/sssssw81"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-angle-theorems-triangle-to-octagon/sssssw81"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-angle-theorems-triangle-to-octagon/sssssw81"/>
      <lastmod>2026-11-01T19:08:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponent-laws-practice-division/sssssw8m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-laws-practice-division/sssssw8m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-laws-practice-division/sssssw8m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-laws-practice-division/sssssw8m"/>
      <lastmod>2026-11-02T16:57:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponent-laws-practice-division/sssssw8m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-laws-practice-division/sssssw8m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-laws-practice-division/sssssw8m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-laws-practice-division/sssssw8m"/>
      <lastmod>2026-11-02T16:57:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-triangular-prism-construction/sssssw8j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-triangular-prism-construction/sssssw8j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-triangular-prism-construction/sssssw8j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-triangular-prism-construction/sssssw8j"/>
      <lastmod>2026-11-02T00:22:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-triangular-prism-construction/sssssw8j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-triangular-prism-construction/sssssw8j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-triangular-prism-construction/sssssw8j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-triangular-prism-construction/sssssw8j"/>
      <lastmod>2026-11-02T00:22:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reading-measuring-cup-scales/sssssw8p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reading-measuring-cup-scales/sssssw8p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reading-measuring-cup-scales/sssssw8p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reading-measuring-cup-scales/sssssw8p"/>
      <lastmod>2026-11-02T18:40:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reading-measuring-cup-scales/sssssw8p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reading-measuring-cup-scales/sssssw8p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reading-measuring-cup-scales/sssssw8p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reading-measuring-cup-scales/sssssw8p"/>
      <lastmod>2026-11-02T18:40:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-exercise-in-coordinate-geometry/sssssw8w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-exercise-in-coordinate-geometry/sssssw8w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-exercise-in-coordinate-geometry/sssssw8w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-exercise-in-coordinate-geometry/sssssw8w"/>
      <lastmod>2026-11-01T19:33:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-exercise-in-coordinate-geometry/sssssw8w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-exercise-in-coordinate-geometry/sssssw8w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-exercise-in-coordinate-geometry/sssssw8w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-exercise-in-coordinate-geometry/sssssw8w"/>
      <lastmod>2026-11-01T19:33:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/same-side-interior-angles/sssssw86</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/same-side-interior-angles/sssssw86"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/same-side-interior-angles/sssssw86"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/same-side-interior-angles/sssssw86"/>
      <lastmod>2026-11-02T17:45:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/same-side-interior-angles/sssssw86</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/same-side-interior-angles/sssssw86"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/same-side-interior-angles/sssssw86"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/same-side-interior-angles/sssssw86"/>
      <lastmod>2026-11-02T17:45:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cycloid-construction-and-demonstration/sssssw8g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cycloid-construction-and-demonstration/sssssw8g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cycloid-construction-and-demonstration/sssssw8g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cycloid-construction-and-demonstration/sssssw8g"/>
      <lastmod>2026-11-01T21:36:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cycloid-construction-and-demonstration/sssssw8g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cycloid-construction-and-demonstration/sssssw8g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cycloid-construction-and-demonstration/sssssw8g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cycloid-construction-and-demonstration/sssssw8g"/>
      <lastmod>2026-11-01T21:36:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reasoning-with-tape-diagrams/sssssw89</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reasoning-with-tape-diagrams/sssssw89"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reasoning-with-tape-diagrams/sssssw89"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reasoning-with-tape-diagrams/sssssw89"/>
      <lastmod>2026-11-01T21:41:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reasoning-with-tape-diagrams/sssssw89</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reasoning-with-tape-diagrams/sssssw89"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reasoning-with-tape-diagrams/sssssw89"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reasoning-with-tape-diagrams/sssssw89"/>
      <lastmod>2026-11-01T21:41:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multivariate-limits-example-2/sssssw8e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multivariate-limits-example-2/sssssw8e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multivariate-limits-example-2/sssssw8e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multivariate-limits-example-2/sssssw8e"/>
      <lastmod>2026-11-02T10:43:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multivariate-limits-example-2/sssssw8e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multivariate-limits-example-2/sssssw8e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multivariate-limits-example-2/sssssw8e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multivariate-limits-example-2/sssssw8e"/>
      <lastmod>2026-11-02T10:43:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/riemann-sphere-projection-f-z-1-z-or-f-z-z-2/sssssw8v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-sphere-projection-f-z-1-z-or-f-z-z-2/sssssw8v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-sphere-projection-f-z-1-z-or-f-z-z-2/sssssw8v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-sphere-projection-f-z-1-z-or-f-z-z-2/sssssw8v"/>
      <lastmod>2026-11-02T00:55:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/riemann-sphere-projection-f-z-1-z-or-f-z-z-2/sssssw8v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-sphere-projection-f-z-1-z-or-f-z-z-2/sssssw8v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-sphere-projection-f-z-1-z-or-f-z-z-2/sssssw8v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-sphere-projection-f-z-1-z-or-f-z-z-2/sssssw8v"/>
      <lastmod>2026-11-02T00:55:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-cross-section-by-alex-sarria/sssssw84</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-cross-section-by-alex-sarria/sssssw84"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-cross-section-by-alex-sarria/sssssw84"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-cross-section-by-alex-sarria/sssssw84"/>
      <lastmod>2026-11-01T19:07:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-cross-section-by-alex-sarria/sssssw84</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-cross-section-by-alex-sarria/sssssw84"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-cross-section-by-alex-sarria/sssssw84"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-cross-section-by-alex-sarria/sssssw84"/>
      <lastmod>2026-11-01T19:07:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/naming-planes-with-three-points/sssssw8l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/naming-planes-with-three-points/sssssw8l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/naming-planes-with-three-points/sssssw8l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/naming-planes-with-three-points/sssssw8l"/>
      <lastmod>2026-11-01T21:51:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/naming-planes-with-three-points/sssssw8l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/naming-planes-with-three-points/sssssw8l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/naming-planes-with-three-points/sssssw8l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/naming-planes-with-three-points/sssssw8l"/>
      <lastmod>2026-11-01T21:51:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/review-of-algebra-2-exponents-roots-and-logarithms/sssssw8y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/review-of-algebra-2-exponents-roots-and-logarithms/sssssw8y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/review-of-algebra-2-exponents-roots-and-logarithms/sssssw8y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/review-of-algebra-2-exponents-roots-and-logarithms/sssssw8y"/>
      <lastmod>2026-11-01T22:00:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/review-of-algebra-2-exponents-roots-and-logarithms/sssssw8y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/review-of-algebra-2-exponents-roots-and-logarithms/sssssw8y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/review-of-algebra-2-exponents-roots-and-logarithms/sssssw8y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/review-of-algebra-2-exponents-roots-and-logarithms/sssssw8y"/>
      <lastmod>2026-11-01T22:00:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rise-run-interactive-example/sssssw8a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rise-run-interactive-example/sssssw8a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rise-run-interactive-example/sssssw8a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rise-run-interactive-example/sssssw8a"/>
      <lastmod>2026-11-02T18:15:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rise-run-interactive-example/sssssw8a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rise-run-interactive-example/sssssw8a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rise-run-interactive-example/sssssw8a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rise-run-interactive-example/sssssw8a"/>
      <lastmod>2026-11-02T18:15:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/add-and-subtract-integers-with-counters/sssssw8c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/add-and-subtract-integers-with-counters/sssssw8c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/add-and-subtract-integers-with-counters/sssssw8c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/add-and-subtract-integers-with-counters/sssssw8c"/>
      <lastmod>2026-11-01T21:33:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/add-and-subtract-integers-with-counters/sssssw8c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/add-and-subtract-integers-with-counters/sssssw8c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/add-and-subtract-integers-with-counters/sssssw8c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/add-and-subtract-integers-with-counters/sssssw8c"/>
      <lastmod>2026-11-01T21:33:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangle-investigation-4/sssssw8r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangle-investigation-4/sssssw8r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangle-investigation-4/sssssw8r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangle-investigation-4/sssssw8r"/>
      <lastmod>2026-11-01T23:12:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangle-investigation-4/sssssw8r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangle-investigation-4/sssssw8r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangle-investigation-4/sssssw8r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangle-investigation-4/sssssw8r"/>
      <lastmod>2026-11-01T23:12:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallel-lines-related-angles-discovery/sssssw8h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-lines-related-angles-discovery/sssssw8h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-lines-related-angles-discovery/sssssw8h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-lines-related-angles-discovery/sssssw8h"/>
      <lastmod>2026-11-02T00:51:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallel-lines-related-angles-discovery/sssssw8h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallel-lines-related-angles-discovery/sssssw8h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallel-lines-related-angles-discovery/sssssw8h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallel-lines-related-angles-discovery/sssssw8h"/>
      <lastmod>2026-11-02T00:51:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-sss-condition-in-hyperbolic-geometry/sssssw8t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-sss-condition-in-hyperbolic-geometry/sssssw8t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-sss-condition-in-hyperbolic-geometry/sssssw8t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-sss-condition-in-hyperbolic-geometry/sssssw8t"/>
      <lastmod>2026-11-01T19:23:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-sss-condition-in-hyperbolic-geometry/sssssw8t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-sss-condition-in-hyperbolic-geometry/sssssw8t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-sss-condition-in-hyperbolic-geometry/sssssw8t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-sss-condition-in-hyperbolic-geometry/sssssw8t"/>
      <lastmod>2026-11-01T19:23:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-polygons/sssssw8x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-polygons/sssssw8x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-polygons/sssssw8x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-polygons/sssssw8x"/>
      <lastmod>2026-11-02T13:32:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-polygons/sssssw8x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-polygons/sssssw8x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-polygons/sssssw8x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-polygons/sssssw8x"/>
      <lastmod>2026-11-02T13:32:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inverse-trigonometric-functions-graphs/sssssw8i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inverse-trigonometric-functions-graphs/sssssw8i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inverse-trigonometric-functions-graphs/sssssw8i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inverse-trigonometric-functions-graphs/sssssw8i"/>
      <lastmod>2026-11-01T21:12:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inverse-trigonometric-functions-graphs/sssssw8i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inverse-trigonometric-functions-graphs/sssssw8i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inverse-trigonometric-functions-graphs/sssssw8i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inverse-trigonometric-functions-graphs/sssssw8i"/>
      <lastmod>2026-11-01T21:12:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-area-formula-dynamic-derivation-and-visualization/sssssw8o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-area-formula-dynamic-derivation-and-visualization/sssssw8o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-area-formula-dynamic-derivation-and-visualization/sssssw8o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-area-formula-dynamic-derivation-and-visualization/sssssw8o"/>
      <lastmod>2026-11-02T00:24:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-area-formula-dynamic-derivation-and-visualization/sssssw8o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-area-formula-dynamic-derivation-and-visualization/sssssw8o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-area-formula-dynamic-derivation-and-visualization/sssssw8o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-area-formula-dynamic-derivation-and-visualization/sssssw8o"/>
      <lastmod>2026-11-02T00:24:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/game-3/ssssswus</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/game-3/ssssswus"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/game-3/ssssswus"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/game-3/ssssswus"/>
      <lastmod>2026-11-01T21:49:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/game-3/ssssswus</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/game-3/ssssswus"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/game-3/ssssswus"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/game-3/ssssswus"/>
      <lastmod>2026-11-01T21:49:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/crossed-rhombus-3d-surface-geometry-demo/ssssswu7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/crossed-rhombus-3d-surface-geometry-demo/ssssswu7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/crossed-rhombus-3d-surface-geometry-demo/ssssswu7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/crossed-rhombus-3d-surface-geometry-demo/ssssswu7"/>
      <lastmod>2026-11-02T16:42:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/crossed-rhombus-3d-surface-geometry-demo/ssssswu7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/crossed-rhombus-3d-surface-geometry-demo/ssssswu7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/crossed-rhombus-3d-surface-geometry-demo/ssssswu7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/crossed-rhombus-3d-surface-geometry-demo/ssssswu7"/>
      <lastmod>2026-11-02T16:42:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/congruent-triangles-exercise-3/ssssswun</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruent-triangles-exercise-3/ssssswun"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruent-triangles-exercise-3/ssssswun"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruent-triangles-exercise-3/ssssswun"/>
      <lastmod>2026-11-02T18:31:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/congruent-triangles-exercise-3/ssssswun</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruent-triangles-exercise-3/ssssswun"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruent-triangles-exercise-3/ssssswun"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruent-triangles-exercise-3/ssssswun"/>
      <lastmod>2026-11-02T18:31:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/covarying-relationship-of-sphere-s-volume-and-surface-area/ssssswu2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/covarying-relationship-of-sphere-s-volume-and-surface-area/ssssswu2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/covarying-relationship-of-sphere-s-volume-and-surface-area/ssssswu2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/covarying-relationship-of-sphere-s-volume-and-surface-area/ssssswu2"/>
      <lastmod>2026-11-02T13:11:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/covarying-relationship-of-sphere-s-volume-and-surface-area/ssssswu2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/covarying-relationship-of-sphere-s-volume-and-surface-area/ssssswu2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/covarying-relationship-of-sphere-s-volume-and-surface-area/ssssswu2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/covarying-relationship-of-sphere-s-volume-and-surface-area/ssssswu2"/>
      <lastmod>2026-11-02T13:11:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-construction/ssssswuk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-construction/ssssswuk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-construction/ssssswuk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-construction/ssssswuk"/>
      <lastmod>2026-11-02T18:48:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-construction/ssssswuk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-construction/ssssswuk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-construction/ssssswuk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-construction/ssssswuk"/>
      <lastmod>2026-11-02T18:48:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-7/ssssswuz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-7/ssssswuz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-illustration-by-tim-brzezinski-7/ssssswuz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-7/ssssswuz"/>
      <lastmod>2026-11-02T17:39:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-geometry-illustration-by-tim-brzezinski-7/ssssswuz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-7/ssssswuz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-illustration-by-tim-brzezinski-7/ssssswuz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-7/ssssswuz"/>
      <lastmod>2026-11-02T17:39:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-triangle-demonstration/ssssswu0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-triangle-demonstration/ssssswu0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-triangle-demonstration/ssssswu0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-triangle-demonstration/ssssswu0"/>
      <lastmod>2026-11-02T17:58:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-triangle-demonstration/ssssswu0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-triangle-demonstration/ssssswu0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-triangle-demonstration/ssssswu0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-triangle-demonstration/ssssswu0"/>
      <lastmod>2026-11-02T17:58:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interference-of-two-same-frequency-waves-effect-of-phase-difference-on-superpos/ssssswud</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interference-of-two-same-frequency-waves-effect-of-phase-difference-on-superpos/ssssswud"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interference-of-two-same-frequency-waves-effect-of-phase-difference-on-superpos/ssssswud"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interference-of-two-same-frequency-waves-effect-of-phase-difference-on-superpos/ssssswud"/>
      <lastmod>2026-11-02T00:09:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interference-of-two-same-frequency-waves-effect-of-phase-difference-on-superpos/ssssswud</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interference-of-two-same-frequency-waves-effect-of-phase-difference-on-superpos/ssssswud"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interference-of-two-same-frequency-waves-effect-of-phase-difference-on-superpos/ssssswud"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interference-of-two-same-frequency-waves-effect-of-phase-difference-on-superpos/ssssswud"/>
      <lastmod>2026-11-02T00:09:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplying-fractions-using-the-area-model/ssssswuf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-fractions-using-the-area-model/ssssswuf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-fractions-using-the-area-model/ssssswuf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-fractions-using-the-area-model/ssssswuf"/>
      <lastmod>2026-11-02T18:18:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplying-fractions-using-the-area-model/ssssswuf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-fractions-using-the-area-model/ssssswuf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-fractions-using-the-area-model/ssssswuf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-fractions-using-the-area-model/ssssswuf"/>
      <lastmod>2026-11-02T18:18:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simultaneous-solution-of-non-linear-equations/ssssswu8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simultaneous-solution-of-non-linear-equations/ssssswu8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simultaneous-solution-of-non-linear-equations/ssssswu8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simultaneous-solution-of-non-linear-equations/ssssswu8"/>
      <lastmod>2026-11-02T18:55:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simultaneous-solution-of-non-linear-equations/ssssswu8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simultaneous-solution-of-non-linear-equations/ssssswu8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simultaneous-solution-of-non-linear-equations/ssssswu8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simultaneous-solution-of-non-linear-equations/ssssswu8"/>
      <lastmod>2026-11-02T18:55:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modul-8b-volume-bola-pri-hastuti-suryaningrum-smpn-57/ssssswuu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modul-8b-volume-bola-pri-hastuti-suryaningrum-smpn-57/ssssswuu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modul-8b-volume-bola-pri-hastuti-suryaningrum-smpn-57/ssssswuu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modul-8b-volume-bola-pri-hastuti-suryaningrum-smpn-57/ssssswuu"/>
      <lastmod>2026-11-02T00:48:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modul-8b-volume-bola-pri-hastuti-suryaningrum-smpn-57/ssssswuu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modul-8b-volume-bola-pri-hastuti-suryaningrum-smpn-57/ssssswuu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modul-8b-volume-bola-pri-hastuti-suryaningrum-smpn-57/ssssswuu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modul-8b-volume-bola-pri-hastuti-suryaningrum-smpn-57/ssssswuu"/>
      <lastmod>2026-11-02T00:48:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-pythagoras-dynamic-geometry-demonstration/ssssswu5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-pythagoras-dynamic-geometry-demonstration/ssssswu5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-pythagoras-dynamic-geometry-demonstration/ssssswu5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-pythagoras-dynamic-geometry-demonstration/ssssswu5"/>
      <lastmod>2026-11-02T02:14:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-pythagoras-dynamic-geometry-demonstration/ssssswu5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-pythagoras-dynamic-geometry-demonstration/ssssswu5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-pythagoras-dynamic-geometry-demonstration/ssssswu5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-pythagoras-dynamic-geometry-demonstration/ssssswu5"/>
      <lastmod>2026-11-02T02:14:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-angled-triangle-quiz/ssssswub</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-angled-triangle-quiz/ssssswub"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-angled-triangle-quiz/ssssswub"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-angled-triangle-quiz/ssssswub"/>
      <lastmod>2026-11-01T22:00:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-angled-triangle-quiz/ssssswub</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-angled-triangle-quiz/ssssswub"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-angled-triangle-quiz/ssssswub"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-angled-triangle-quiz/ssssswub"/>
      <lastmod>2026-11-01T22:00:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-exponential-functions/ssssswu3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-exponential-functions/ssssswu3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-exponential-functions/ssssswu3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-exponential-functions/ssssswu3"/>
      <lastmod>2026-11-01T23:37:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-exponential-functions/ssssswu3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-exponential-functions/ssssswu3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-exponential-functions/ssssswu3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-exponential-functions/ssssswu3"/>
      <lastmod>2026-11-01T23:37:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangular-prism-construction-in-geogebra/ssssswuq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-prism-construction-in-geogebra/ssssswuq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-prism-construction-in-geogebra/ssssswuq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-prism-construction-in-geogebra/ssssswuq"/>
      <lastmod>2026-11-02T09:15:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangular-prism-construction-in-geogebra/ssssswuq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-prism-construction-in-geogebra/ssssswuq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-prism-construction-in-geogebra/ssssswuq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-prism-construction-in-geogebra/ssssswuq"/>
      <lastmod>2026-11-02T09:15:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/heights-in-triangles/ssssswu1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/heights-in-triangles/ssssswu1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/heights-in-triangles/ssssswu1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/heights-in-triangles/ssssswu1"/>
      <lastmod>2026-11-02T09:34:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/heights-in-triangles/ssssswu1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/heights-in-triangles/ssssswu1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/heights-in-triangles/ssssswu1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/heights-in-triangles/ssssswu1"/>
      <lastmod>2026-11-02T09:34:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animation-258-incircle-of-an-equilateral-triangle/ssssswum</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-258-incircle-of-an-equilateral-triangle/ssssswum"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-258-incircle-of-an-equilateral-triangle/ssssswum"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-258-incircle-of-an-equilateral-triangle/ssssswum"/>
      <lastmod>2026-11-02T18:11:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animation-258-incircle-of-an-equilateral-triangle/ssssswum</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-258-incircle-of-an-equilateral-triangle/ssssswum"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-258-incircle-of-an-equilateral-triangle/ssssswum"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-258-incircle-of-an-equilateral-triangle/ssssswum"/>
      <lastmod>2026-11-02T18:11:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-quadratic-equation/ssssswuj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-quadratic-equation/ssssswuj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-quadratic-equation/ssssswuj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-quadratic-equation/ssssswuj"/>
      <lastmod>2026-11-02T16:43:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-quadratic-equation/ssssswuj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-quadratic-equation/ssssswuj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-quadratic-equation/ssssswuj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-quadratic-equation/ssssswuj"/>
      <lastmod>2026-11-02T16:43:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-rotations-around-a-point-not-the-origin/ssssswup</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-rotations-around-a-point-not-the-origin/ssssswup"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-rotations-around-a-point-not-the-origin/ssssswup"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-rotations-around-a-point-not-the-origin/ssssswup"/>
      <lastmod>2026-11-02T02:19:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-rotations-around-a-point-not-the-origin/ssssswup</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-rotations-around-a-point-not-the-origin/ssssswup"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-rotations-around-a-point-not-the-origin/ssssswup"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-rotations-around-a-point-not-the-origin/ssssswup"/>
      <lastmod>2026-11-02T02:19:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/using-matrices-for-transformations/ssssswuw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-matrices-for-transformations/ssssswuw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-matrices-for-transformations/ssssswuw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-matrices-for-transformations/ssssswuw"/>
      <lastmod>2026-11-02T06:50:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/using-matrices-for-transformations/ssssswuw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-matrices-for-transformations/ssssswuw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-matrices-for-transformations/ssssswuw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-matrices-for-transformations/ssssswuw"/>
      <lastmod>2026-11-02T06:50:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphical-limit-definition-of-a-derivative-difference-quotient-and-tangent/ssssswu6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-limit-definition-of-a-derivative-difference-quotient-and-tangent/ssssswu6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-limit-definition-of-a-derivative-difference-quotient-and-tangent/ssssswu6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-limit-definition-of-a-derivative-difference-quotient-and-tangent/ssssswu6"/>
      <lastmod>2026-11-01T20:36:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphical-limit-definition-of-a-derivative-difference-quotient-and-tangent/ssssswu6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-limit-definition-of-a-derivative-difference-quotient-and-tangent/ssssswu6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-limit-definition-of-a-derivative-difference-quotient-and-tangent/ssssswu6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-limit-definition-of-a-derivative-difference-quotient-and-tangent/ssssswu6"/>
      <lastmod>2026-11-01T20:36:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-on-a-cylinder/ssssswug</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-on-a-cylinder/ssssswug"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-on-a-cylinder/ssssswug"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-on-a-cylinder/ssssswug"/>
      <lastmod>2026-11-02T18:47:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-on-a-cylinder/ssssswug</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-on-a-cylinder/ssssswug"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-on-a-cylinder/ssssswug"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-on-a-cylinder/ssssswug"/>
      <lastmod>2026-11-02T18:47:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/real-component-of-arctan-z-3d-surface-visualization/ssssswu9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/real-component-of-arctan-z-3d-surface-visualization/ssssswu9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/real-component-of-arctan-z-3d-surface-visualization/ssssswu9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/real-component-of-arctan-z-3d-surface-visualization/ssssswu9"/>
      <lastmod>2026-11-02T02:37:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/real-component-of-arctan-z-3d-surface-visualization/ssssswu9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/real-component-of-arctan-z-3d-surface-visualization/ssssswu9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/real-component-of-arctan-z-3d-surface-visualization/ssssswu9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/real-component-of-arctan-z-3d-surface-visualization/ssssswu9"/>
      <lastmod>2026-11-02T02:37:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perimeter-of-a-rectangle/ssssswue</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-of-a-rectangle/ssssswue"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-of-a-rectangle/ssssswue"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-of-a-rectangle/ssssswue"/>
      <lastmod>2026-11-02T15:39:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perimeter-of-a-rectangle/ssssswue</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-of-a-rectangle/ssssswue"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-of-a-rectangle/ssssswue"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-of-a-rectangle/ssssswue"/>
      <lastmod>2026-11-02T15:39:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-hyperbola-demo/ssssswuv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-hyperbola-demo/ssssswuv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-hyperbola-demo/ssssswuv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-hyperbola-demo/ssssswuv"/>
      <lastmod>2026-11-02T18:05:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-hyperbola-demo/ssssswuv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-hyperbola-demo/ssssswuv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-hyperbola-demo/ssssswuv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-hyperbola-demo/ssssswuv"/>
      <lastmod>2026-11-02T18:05:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-charge-distributions-in-equilibrium/ssssswu4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-charge-distributions-in-equilibrium/ssssswu4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-charge-distributions-in-equilibrium/ssssswu4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-charge-distributions-in-equilibrium/ssssswu4"/>
      <lastmod>2026-11-02T16:33:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-charge-distributions-in-equilibrium/ssssswu4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-charge-distributions-in-equilibrium/ssssswu4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-charge-distributions-in-equilibrium/ssssswu4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-charge-distributions-in-equilibrium/ssssswu4"/>
      <lastmod>2026-11-02T16:33:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hannah-constructing-a-unmessupable-rhombus/ssssswul</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hannah-constructing-a-unmessupable-rhombus/ssssswul"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hannah-constructing-a-unmessupable-rhombus/ssssswul"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hannah-constructing-a-unmessupable-rhombus/ssssswul"/>
      <lastmod>2026-11-02T00:36:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hannah-constructing-a-unmessupable-rhombus/ssssswul</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hannah-constructing-a-unmessupable-rhombus/ssssswul"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hannah-constructing-a-unmessupable-rhombus/ssssswul"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hannah-constructing-a-unmessupable-rhombus/ssssswul"/>
      <lastmod>2026-11-02T00:36:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circumference-of-a-circle-by-jimpax/ssssswuy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumference-of-a-circle-by-jimpax/ssssswuy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumference-of-a-circle-by-jimpax/ssssswuy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumference-of-a-circle-by-jimpax/ssssswuy"/>
      <lastmod>2026-11-02T18:37:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circumference-of-a-circle-by-jimpax/ssssswuy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumference-of-a-circle-by-jimpax/ssssswuy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumference-of-a-circle-by-jimpax/ssssswuy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumference-of-a-circle-by-jimpax/ssssswuy"/>
      <lastmod>2026-11-02T18:37:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lissajous-curves-demo/ssssswua</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lissajous-curves-demo/ssssswua"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lissajous-curves-demo/ssssswua"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lissajous-curves-demo/ssssswua"/>
      <lastmod>2026-11-01T19:22:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lissajous-curves-demo/ssssswua</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lissajous-curves-demo/ssssswua"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lissajous-curves-demo/ssssswua"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lissajous-curves-demo/ssssswua"/>
      <lastmod>2026-11-01T19:22:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polynomial-inequalities/ssssswuc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-inequalities/ssssswuc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-inequalities/ssssswuc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-inequalities/ssssswuc"/>
      <lastmod>2026-11-01T23:46:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polynomial-inequalities/ssssswuc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-inequalities/ssssswuc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-inequalities/ssssswuc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-inequalities/ssssswuc"/>
      <lastmod>2026-11-01T23:46:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/using-rectangles-to-estimate-area-under-a-curve/ssssswur</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-rectangles-to-estimate-area-under-a-curve/ssssswur"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-rectangles-to-estimate-area-under-a-curve/ssssswur"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-rectangles-to-estimate-area-under-a-curve/ssssswur"/>
      <lastmod>2026-11-01T23:45:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/using-rectangles-to-estimate-area-under-a-curve/ssssswur</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-rectangles-to-estimate-area-under-a-curve/ssssswur"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-rectangles-to-estimate-area-under-a-curve/ssssswur"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-rectangles-to-estimate-area-under-a-curve/ssssswur"/>
      <lastmod>2026-11-01T23:45:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-opposite-sides/ssssswuh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-opposite-sides/ssssswuh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-opposite-sides/ssssswuh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-opposite-sides/ssssswuh"/>
      <lastmod>2026-11-02T18:20:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-opposite-sides/ssssswuh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-opposite-sides/ssssswuh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-opposite-sides/ssssswuh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-opposite-sides/ssssswuh"/>
      <lastmod>2026-11-02T18:20:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sorting-horizontal-and-vertical-lines/ssssswut</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sorting-horizontal-and-vertical-lines/ssssswut"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sorting-horizontal-and-vertical-lines/ssssswut"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sorting-horizontal-and-vertical-lines/ssssswut"/>
      <lastmod>2026-11-01T23:39:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sorting-horizontal-and-vertical-lines/ssssswut</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sorting-horizontal-and-vertical-lines/ssssswut"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sorting-horizontal-and-vertical-lines/ssssswut"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sorting-horizontal-and-vertical-lines/ssssswut"/>
      <lastmod>2026-11-01T23:39:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-investigation/ssssswux</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-investigation/ssssswux"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-investigation/ssssswux"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-investigation/ssssswux"/>
      <lastmod>2026-11-02T17:55:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-investigation/ssssswux</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-investigation/ssssswux"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-investigation/ssssswux"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-investigation/ssssswux"/>
      <lastmod>2026-11-02T17:55:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-illustration-of-special-relationships-with-equilateral-triangles/ssssswui</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-special-relationships-with-equilateral-triangles/ssssswui"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-special-relationships-with-equilateral-triangles/ssssswui"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-special-relationships-with-equilateral-triangles/ssssswui"/>
      <lastmod>2026-11-02T18:03:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-illustration-of-special-relationships-with-equilateral-triangles/ssssswui</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-special-relationships-with-equilateral-triangles/ssssswui"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-illustration-of-special-relationships-with-equilateral-triangles/ssssswui"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-illustration-of-special-relationships-with-equilateral-triangles/ssssswui"/>
      <lastmod>2026-11-02T18:03:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cartesian-to-polar-grapher/ssssswuo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cartesian-to-polar-grapher/ssssswuo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cartesian-to-polar-grapher/ssssswuo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cartesian-to-polar-grapher/ssssswuo"/>
      <lastmod>2026-11-01T19:35:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cartesian-to-polar-grapher/ssssswuo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cartesian-to-polar-grapher/ssssswuo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cartesian-to-polar-grapher/ssssswuo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cartesian-to-polar-grapher/ssssswuo"/>
      <lastmod>2026-11-01T19:35:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/saving-geogebra-files-by-geogebra-team/sssssw5s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/saving-geogebra-files-by-geogebra-team/sssssw5s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/saving-geogebra-files-by-geogebra-team/sssssw5s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/saving-geogebra-files-by-geogebra-team/sssssw5s"/>
      <lastmod>2026-11-02T18:24:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/saving-geogebra-files-by-geogebra-team/sssssw5s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/saving-geogebra-files-by-geogebra-team/sssssw5s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/saving-geogebra-files-by-geogebra-team/sssssw5s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/saving-geogebra-files-by-geogebra-team/sssssw5s"/>
      <lastmod>2026-11-02T18:24:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/general-term-of-arithmetic-sequence-from-two-terms/sssssw57</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/general-term-of-arithmetic-sequence-from-two-terms/sssssw57"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/general-term-of-arithmetic-sequence-from-two-terms/sssssw57"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/general-term-of-arithmetic-sequence-from-two-terms/sssssw57"/>
      <lastmod>2026-11-01T20:54:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/general-term-of-arithmetic-sequence-from-two-terms/sssssw57</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/general-term-of-arithmetic-sequence-from-two-terms/sssssw57"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/general-term-of-arithmetic-sequence-from-two-terms/sssssw57"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/general-term-of-arithmetic-sequence-from-two-terms/sssssw57"/>
      <lastmod>2026-11-01T20:54:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prism-volume-demonstration/sssssw5n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-volume-demonstration/sssssw5n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-volume-demonstration/sssssw5n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-volume-demonstration/sssssw5n"/>
      <lastmod>2026-11-01T22:01:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prism-volume-demonstration/sssssw5n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-volume-demonstration/sssssw5n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-volume-demonstration/sssssw5n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-volume-demonstration/sssssw5n"/>
      <lastmod>2026-11-01T22:01:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slope-field-generator/sssssw52</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-field-generator/sssssw52"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-field-generator/sssssw52"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-field-generator/sssssw52"/>
      <lastmod>2026-11-02T02:19:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slope-field-generator/sssssw52</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-field-generator/sssssw52"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-field-generator/sssssw52"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-field-generator/sssssw52"/>
      <lastmod>2026-11-02T02:19:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/connecting-congruent-polygons/sssssw5k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connecting-congruent-polygons/sssssw5k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connecting-congruent-polygons/sssssw5k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connecting-congruent-polygons/sssssw5k"/>
      <lastmod>2026-11-02T16:50:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/connecting-congruent-polygons/sssssw5k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connecting-congruent-polygons/sssssw5k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connecting-congruent-polygons/sssssw5k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connecting-congruent-polygons/sssssw5k"/>
      <lastmod>2026-11-02T16:50:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vertical-angles-exploration/sssssw5z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-angles-exploration/sssssw5z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-angles-exploration/sssssw5z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-angles-exploration/sssssw5z"/>
      <lastmod>2026-11-01T22:01:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vertical-angles-exploration/sssssw5z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-angles-exploration/sssssw5z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-angles-exploration/sssssw5z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-angles-exploration/sssssw5z"/>
      <lastmod>2026-11-01T22:01:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/brilliant-square/sssssw50</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/brilliant-square/sssssw50"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/brilliant-square/sssssw50"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/brilliant-square/sssssw50"/>
      <lastmod>2026-11-02T17:56:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/brilliant-square/sssssw50</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/brilliant-square/sssssw50"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/brilliant-square/sssssw50"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/brilliant-square/sssssw50"/>
      <lastmod>2026-11-02T17:56:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construction-question-11/sssssw5d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-question-11/sssssw5d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-question-11/sssssw5d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-question-11/sssssw5d"/>
      <lastmod>2026-11-02T13:13:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construction-question-11/sssssw5d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-question-11/sssssw5d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-question-11/sssssw5d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-question-11/sssssw5d"/>
      <lastmod>2026-11-02T13:13:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/centroid-circumcircle-and-incircle-of-a-triangle/sssssw5f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/centroid-circumcircle-and-incircle-of-a-triangle/sssssw5f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/centroid-circumcircle-and-incircle-of-a-triangle/sssssw5f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/centroid-circumcircle-and-incircle-of-a-triangle/sssssw5f"/>
      <lastmod>2026-11-02T07:12:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/centroid-circumcircle-and-incircle-of-a-triangle/sssssw5f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/centroid-circumcircle-and-incircle-of-a-triangle/sssssw5f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/centroid-circumcircle-and-incircle-of-a-triangle/sssssw5f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/centroid-circumcircle-and-incircle-of-a-triangle/sssssw5f"/>
      <lastmod>2026-11-02T07:12:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pointwise-convergence-does-not-preserve-boundedness/sssssw58</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pointwise-convergence-does-not-preserve-boundedness/sssssw58"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pointwise-convergence-does-not-preserve-boundedness/sssssw58"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pointwise-convergence-does-not-preserve-boundedness/sssssw58"/>
      <lastmod>2026-11-01T21:34:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pointwise-convergence-does-not-preserve-boundedness/sssssw58</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pointwise-convergence-does-not-preserve-boundedness/sssssw58"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pointwise-convergence-does-not-preserve-boundedness/sssssw58"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pointwise-convergence-does-not-preserve-boundedness/sssssw58"/>
      <lastmod>2026-11-01T21:34:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/counting-from-1-to-10-practice/sssssw5u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/counting-from-1-to-10-practice/sssssw5u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/counting-from-1-to-10-practice/sssssw5u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/counting-from-1-to-10-practice/sssssw5u"/>
      <lastmod>2026-11-02T16:49:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/counting-from-1-to-10-practice/sssssw5u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/counting-from-1-to-10-practice/sssssw5u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/counting-from-1-to-10-practice/sssssw5u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/counting-from-1-to-10-practice/sssssw5u"/>
      <lastmod>2026-11-02T16:49:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/faces-edges-and-vertices-of-a-triangular-pyramid/sssssw55</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/faces-edges-and-vertices-of-a-triangular-pyramid/sssssw55"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/faces-edges-and-vertices-of-a-triangular-pyramid/sssssw55"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/faces-edges-and-vertices-of-a-triangular-pyramid/sssssw55"/>
      <lastmod>2026-11-01T20:45:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/faces-edges-and-vertices-of-a-triangular-pyramid/sssssw55</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/faces-edges-and-vertices-of-a-triangular-pyramid/sssssw55"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/faces-edges-and-vertices-of-a-triangular-pyramid/sssssw55"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/faces-edges-and-vertices-of-a-triangular-pyramid/sssssw55"/>
      <lastmod>2026-11-01T20:45:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drawing-histograms-by-liew-ti-woon/sssssw5b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-histograms-by-liew-ti-woon/sssssw5b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-histograms-by-liew-ti-woon/sssssw5b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-histograms-by-liew-ti-woon/sssssw5b"/>
      <lastmod>2026-11-02T18:27:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drawing-histograms-by-liew-ti-woon/sssssw5b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-histograms-by-liew-ti-woon/sssssw5b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-histograms-by-liew-ti-woon/sssssw5b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-histograms-by-liew-ti-woon/sssssw5b"/>
      <lastmod>2026-11-02T18:27:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-e-x-by-charles-bowen/sssssw53</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-e-x-by-charles-bowen/sssssw53"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-e-x-by-charles-bowen/sssssw53"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-e-x-by-charles-bowen/sssssw53"/>
      <lastmod>2026-11-02T02:43:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-of-e-x-by-charles-bowen/sssssw53</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-e-x-by-charles-bowen/sssssw53"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-e-x-by-charles-bowen/sssssw53"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-e-x-by-charles-bowen/sssssw53"/>
      <lastmod>2026-11-02T02:43:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/co-interior-angles-theorem/sssssw5q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/co-interior-angles-theorem/sssssw5q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/co-interior-angles-theorem/sssssw5q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/co-interior-angles-theorem/sssssw5q"/>
      <lastmod>2026-11-01T23:09:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/co-interior-angles-theorem/sssssw5q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/co-interior-angles-theorem/sssssw5q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/co-interior-angles-theorem/sssssw5q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/co-interior-angles-theorem/sssssw5q"/>
      <lastmod>2026-11-01T23:09:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/negative-numbers-addition-subtraction-self-review/sssssw51</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/negative-numbers-addition-subtraction-self-review/sssssw51"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/negative-numbers-addition-subtraction-self-review/sssssw51"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/negative-numbers-addition-subtraction-self-review/sssssw51"/>
      <lastmod>2026-11-01T23:43:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/negative-numbers-addition-subtraction-self-review/sssssw51</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/negative-numbers-addition-subtraction-self-review/sssssw51"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/negative-numbers-addition-subtraction-self-review/sssssw51"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/negative-numbers-addition-subtraction-self-review/sssssw51"/>
      <lastmod>2026-11-01T23:43:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-square-numbers-by-eduardo-neto/sssssw5m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-square-numbers-by-eduardo-neto/sssssw5m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-square-numbers-by-eduardo-neto/sssssw5m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-square-numbers-by-eduardo-neto/sssssw5m"/>
      <lastmod>2026-11-02T18:04:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-square-numbers-by-eduardo-neto/sssssw5m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-square-numbers-by-eduardo-neto/sssssw5m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-square-numbers-by-eduardo-neto/sssssw5m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-square-numbers-by-eduardo-neto/sssssw5m"/>
      <lastmod>2026-11-02T18:04:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-cone-3d-construction-and-geometric-visualization/sssssw5j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cone-3d-construction-and-geometric-visualization/sssssw5j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cone-3d-construction-and-geometric-visualization/sssssw5j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cone-3d-construction-and-geometric-visualization/sssssw5j"/>
      <lastmod>2026-11-02T18:09:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-cone-3d-construction-and-geometric-visualization/sssssw5j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-cone-3d-construction-and-geometric-visualization/sssssw5j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-cone-3d-construction-and-geometric-visualization/sssssw5j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-cone-3d-construction-and-geometric-visualization/sssssw5j"/>
      <lastmod>2026-11-02T18:09:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-a-parallelepiped/sssssw5p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-parallelepiped/sssssw5p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-parallelepiped/sssssw5p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-parallelepiped/sssssw5p"/>
      <lastmod>2026-11-01T22:01:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-a-parallelepiped/sssssw5p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-parallelepiped/sssssw5p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-parallelepiped/sssssw5p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-parallelepiped/sssssw5p"/>
      <lastmod>2026-11-01T22:01:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiply-by-5-with-dice/sssssw5w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiply-by-5-with-dice/sssssw5w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiply-by-5-with-dice/sssssw5w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiply-by-5-with-dice/sssssw5w"/>
      <lastmod>2026-11-01T20:53:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiply-by-5-with-dice/sssssw5w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiply-by-5-with-dice/sssssw5w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiply-by-5-with-dice/sssssw5w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiply-by-5-with-dice/sssssw5w"/>
      <lastmod>2026-11-01T20:53:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/viviani-theorem-proof-by-areas/sssssw56</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/viviani-theorem-proof-by-areas/sssssw56"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/viviani-theorem-proof-by-areas/sssssw56"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/viviani-theorem-proof-by-areas/sssssw56"/>
      <lastmod>2026-11-01T19:32:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/viviani-theorem-proof-by-areas/sssssw56</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/viviani-theorem-proof-by-areas/sssssw56"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/viviani-theorem-proof-by-areas/sssssw56"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/viviani-theorem-proof-by-areas/sssssw56"/>
      <lastmod>2026-11-01T19:32:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-addition-quiz-generator/sssssw5g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-addition-quiz-generator/sssssw5g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-addition-quiz-generator/sssssw5g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-addition-quiz-generator/sssssw5g"/>
      <lastmod>2026-11-02T03:11:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-addition-quiz-generator/sssssw5g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-addition-quiz-generator/sssssw5g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-addition-quiz-generator/sssssw5g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-addition-quiz-generator/sssssw5g"/>
      <lastmod>2026-11-02T03:11:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/algebra-2-solving-exponential-equation-mini-quiz/sssssw59</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebra-2-solving-exponential-equation-mini-quiz/sssssw59"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebra-2-solving-exponential-equation-mini-quiz/sssssw59"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebra-2-solving-exponential-equation-mini-quiz/sssssw59"/>
      <lastmod>2026-11-01T23:34:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/algebra-2-solving-exponential-equation-mini-quiz/sssssw59</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebra-2-solving-exponential-equation-mini-quiz/sssssw59"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebra-2-solving-exponential-equation-mini-quiz/sssssw59"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebra-2-solving-exponential-equation-mini-quiz/sssssw59"/>
      <lastmod>2026-11-01T23:34:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/distance-to-another-line/sssssw5e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-to-another-line/sssssw5e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-to-another-line/sssssw5e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-to-another-line/sssssw5e"/>
      <lastmod>2026-11-02T17:59:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/distance-to-another-line/sssssw5e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-to-another-line/sssssw5e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-to-another-line/sssssw5e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-to-another-line/sssssw5e"/>
      <lastmod>2026-11-02T17:59:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/zoom-in-golden-rectangle-infinite-loop/sssssw5v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/zoom-in-golden-rectangle-infinite-loop/sssssw5v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/zoom-in-golden-rectangle-infinite-loop/sssssw5v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/zoom-in-golden-rectangle-infinite-loop/sssssw5v"/>
      <lastmod>2026-11-02T16:57:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/zoom-in-golden-rectangle-infinite-loop/sssssw5v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/zoom-in-golden-rectangle-infinite-loop/sssssw5v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/zoom-in-golden-rectangle-infinite-loop/sssssw5v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/zoom-in-golden-rectangle-infinite-loop/sssssw5v"/>
      <lastmod>2026-11-02T16:57:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-transformation-by-elana/sssssw54</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-transformation-by-elana/sssssw54"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-transformation-by-elana/sssssw54"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-transformation-by-elana/sssssw54"/>
      <lastmod>2026-11-02T17:47:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-transformation-by-elana/sssssw54</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-transformation-by-elana/sssssw54"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-transformation-by-elana/sssssw54"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-transformation-by-elana/sssssw54"/>
      <lastmod>2026-11-02T17:47:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/root-construction/sssssw5l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/root-construction/sssssw5l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/root-construction/sssssw5l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/root-construction/sssssw5l"/>
      <lastmod>2026-11-01T21:42:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/root-construction/sssssw5l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/root-construction/sssssw5l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/root-construction/sssssw5l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/root-construction/sssssw5l"/>
      <lastmod>2026-11-01T21:42:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circumcenter-of-a-triangle-by-karen-campe/sssssw5y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumcenter-of-a-triangle-by-karen-campe/sssssw5y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumcenter-of-a-triangle-by-karen-campe/sssssw5y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumcenter-of-a-triangle-by-karen-campe/sssssw5y"/>
      <lastmod>2026-11-02T16:49:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circumcenter-of-a-triangle-by-karen-campe/sssssw5y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumcenter-of-a-triangle-by-karen-campe/sssssw5y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumcenter-of-a-triangle-by-karen-campe/sssssw5y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumcenter-of-a-triangle-by-karen-campe/sssssw5y"/>
      <lastmod>2026-11-02T16:49:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/julia-set-c-0-0-33i-in-the-complex-plane/sssssw5a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/julia-set-c-0-0-33i-in-the-complex-plane/sssssw5a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/julia-set-c-0-0-33i-in-the-complex-plane/sssssw5a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/julia-set-c-0-0-33i-in-the-complex-plane/sssssw5a"/>
      <lastmod>2026-11-01T21:12:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/julia-set-c-0-0-33i-in-the-complex-plane/sssssw5a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/julia-set-c-0-0-33i-in-the-complex-plane/sssssw5a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/julia-set-c-0-0-33i-in-the-complex-plane/sssssw5a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/julia-set-c-0-0-33i-in-the-complex-plane/sssssw5a"/>
      <lastmod>2026-11-01T21:12:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-by-ricardo-roque/sssssw5c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-by-ricardo-roque/sssssw5c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-by-ricardo-roque/sssssw5c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-by-ricardo-roque/sssssw5c"/>
      <lastmod>2026-11-02T06:49:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-by-ricardo-roque/sssssw5c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-by-ricardo-roque/sssssw5c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-by-ricardo-roque/sssssw5c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-by-ricardo-roque/sssssw5c"/>
      <lastmod>2026-11-02T06:49:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spherical-coordinates-by-paul-belliveau/sssssw5r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-coordinates-by-paul-belliveau/sssssw5r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-coordinates-by-paul-belliveau/sssssw5r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-coordinates-by-paul-belliveau/sssssw5r"/>
      <lastmod>2026-11-02T18:56:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spherical-coordinates-by-paul-belliveau/sssssw5r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-coordinates-by-paul-belliveau/sssssw5r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-coordinates-by-paul-belliveau/sssssw5r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-coordinates-by-paul-belliveau/sssssw5r"/>
      <lastmod>2026-11-02T18:56:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construction-of-perpendicular-bisector-using-compasses/sssssw5h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-perpendicular-bisector-using-compasses/sssssw5h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-perpendicular-bisector-using-compasses/sssssw5h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-perpendicular-bisector-using-compasses/sssssw5h"/>
      <lastmod>2026-11-02T12:24:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construction-of-perpendicular-bisector-using-compasses/sssssw5h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-perpendicular-bisector-using-compasses/sssssw5h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-perpendicular-bisector-using-compasses/sssssw5h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-perpendicular-bisector-using-compasses/sssssw5h"/>
      <lastmod>2026-11-02T12:24:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circumcenter-of-horry-county/sssssw5t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumcenter-of-horry-county/sssssw5t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumcenter-of-horry-county/sssssw5t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumcenter-of-horry-county/sssssw5t"/>
      <lastmod>2026-11-01T21:53:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circumcenter-of-horry-county/sssssw5t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumcenter-of-horry-county/sssssw5t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumcenter-of-horry-county/sssssw5t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumcenter-of-horry-county/sssssw5t"/>
      <lastmod>2026-11-01T21:53:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prism-construction-and-net-exploration/sssssw5x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-construction-and-net-exploration/sssssw5x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-construction-and-net-exploration/sssssw5x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-construction-and-net-exploration/sssssw5x"/>
      <lastmod>2026-11-02T00:40:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prism-construction-and-net-exploration/sssssw5x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-construction-and-net-exploration/sssssw5x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-construction-and-net-exploration/sssssw5x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-construction-and-net-exploration/sssssw5x"/>
      <lastmod>2026-11-02T00:40:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/growing-pyramid/sssssw5i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/growing-pyramid/sssssw5i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/growing-pyramid/sssssw5i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/growing-pyramid/sssssw5i"/>
      <lastmod>2026-11-02T13:14:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/growing-pyramid/sssssw5i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/growing-pyramid/sssssw5i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/growing-pyramid/sssssw5i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/growing-pyramid/sssssw5i"/>
      <lastmod>2026-11-02T13:14:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/segment-addition-postulate-demo-by-a-chimino/sssssw5o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-demo-by-a-chimino/sssssw5o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/segment-addition-postulate-demo-by-a-chimino/sssssw5o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-demo-by-a-chimino/sssssw5o"/>
      <lastmod>2026-11-02T18:13:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/segment-addition-postulate-demo-by-a-chimino/sssssw5o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-demo-by-a-chimino/sssssw5o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/segment-addition-postulate-demo-by-a-chimino/sssssw5o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/segment-addition-postulate-demo-by-a-chimino/sssssw5o"/>
      <lastmod>2026-11-02T18:13:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-and-tangent-function-interaction-demo/ssssswbs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-and-tangent-function-interaction-demo/ssssswbs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-and-tangent-function-interaction-demo/ssssswbs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-and-tangent-function-interaction-demo/ssssswbs"/>
      <lastmod>2026-11-01T19:27:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-and-tangent-function-interaction-demo/ssssswbs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-and-tangent-function-interaction-demo/ssssswbs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-and-tangent-function-interaction-demo/ssssswbs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-and-tangent-function-interaction-demo/ssssswbs"/>
      <lastmod>2026-11-01T19:27:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/difference-of-two-line-segments-by-gabriella-yates/ssssswb7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/difference-of-two-line-segments-by-gabriella-yates/ssssswb7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/difference-of-two-line-segments-by-gabriella-yates/ssssswb7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/difference-of-two-line-segments-by-gabriella-yates/ssssswb7"/>
      <lastmod>2026-11-02T18:04:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/difference-of-two-line-segments-by-gabriella-yates/ssssswb7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/difference-of-two-line-segments-by-gabriella-yates/ssssswb7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/difference-of-two-line-segments-by-gabriella-yates/ssssswb7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/difference-of-two-line-segments-by-gabriella-yates/ssssswb7"/>
      <lastmod>2026-11-02T18:04:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construct-a-square-using-ab-as-one-side/ssssswbn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-a-square-using-ab-as-one-side/ssssswbn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-a-square-using-ab-as-one-side/ssssswbn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-a-square-using-ab-as-one-side/ssssswbn"/>
      <lastmod>2026-11-01T21:23:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construct-a-square-using-ab-as-one-side/ssssswbn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-a-square-using-ab-as-one-side/ssssswbn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-a-square-using-ab-as-one-side/ssssswbn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-a-square-using-ab-as-one-side/ssssswbn"/>
      <lastmod>2026-11-01T21:23:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/condorcet-s-jury-theorem-visualization/ssssswb2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/condorcet-s-jury-theorem-visualization/ssssswb2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/condorcet-s-jury-theorem-visualization/ssssswb2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/condorcet-s-jury-theorem-visualization/ssssswb2"/>
      <lastmod>2026-11-02T18:25:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/condorcet-s-jury-theorem-visualization/ssssswb2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/condorcet-s-jury-theorem-visualization/ssssswb2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/condorcet-s-jury-theorem-visualization/ssssswb2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/condorcet-s-jury-theorem-visualization/ssssswb2"/>
      <lastmod>2026-11-02T18:25:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conic-sections-and-elements-of-conic-curves/ssssswbk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-sections-and-elements-of-conic-curves/ssssswbk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-sections-and-elements-of-conic-curves/ssssswbk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-and-elements-of-conic-curves/ssssswbk"/>
      <lastmod>2026-11-02T15:15:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conic-sections-and-elements-of-conic-curves/ssssswbk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-sections-and-elements-of-conic-curves/ssssswbk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-sections-and-elements-of-conic-curves/ssssswbk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-and-elements-of-conic-curves/ssssswbk"/>
      <lastmod>2026-11-02T15:15:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/partitioned-line-segment-with-parametric-curves/ssssswbz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partitioned-line-segment-with-parametric-curves/ssssswbz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partitioned-line-segment-with-parametric-curves/ssssswbz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partitioned-line-segment-with-parametric-curves/ssssswbz"/>
      <lastmod>2026-11-01T23:35:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/partitioned-line-segment-with-parametric-curves/ssssswbz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partitioned-line-segment-with-parametric-curves/ssssswbz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partitioned-line-segment-with-parametric-curves/ssssswbz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partitioned-line-segment-with-parametric-curves/ssssswbz"/>
      <lastmod>2026-11-01T23:35:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-squares-and-parallelograms/ssssswb0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-squares-and-parallelograms/ssssswb0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-squares-and-parallelograms/ssssswb0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-squares-and-parallelograms/ssssswb0"/>
      <lastmod>2026-11-02T12:00:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-squares-and-parallelograms/ssssswb0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-squares-and-parallelograms/ssssswb0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-squares-and-parallelograms/ssssswb0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-squares-and-parallelograms/ssssswb0"/>
      <lastmod>2026-11-02T12:00:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/straight-lines-angle-bisectors-and-polygon-construction/ssssswbd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/straight-lines-angle-bisectors-and-polygon-construction/ssssswbd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/straight-lines-angle-bisectors-and-polygon-construction/ssssswbd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/straight-lines-angle-bisectors-and-polygon-construction/ssssswbd"/>
      <lastmod>2026-11-02T18:11:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/straight-lines-angle-bisectors-and-polygon-construction/ssssswbd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/straight-lines-angle-bisectors-and-polygon-construction/ssssswbd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/straight-lines-angle-bisectors-and-polygon-construction/ssssswbd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/straight-lines-angle-bisectors-and-polygon-construction/ssssswbd"/>
      <lastmod>2026-11-02T18:11:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arithmetic-sequence-puzzle/ssssswbf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-puzzle/ssssswbf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-sequence-puzzle/ssssswbf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-puzzle/ssssswbf"/>
      <lastmod>2026-11-02T02:44:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arithmetic-sequence-puzzle/ssssswbf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-puzzle/ssssswbf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-sequence-puzzle/ssssswbf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-sequence-puzzle/ssssswbf"/>
      <lastmod>2026-11-02T02:44:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circumcircle-construction-example/ssssswb8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumcircle-construction-example/ssssswb8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumcircle-construction-example/ssssswb8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumcircle-construction-example/ssssswb8"/>
      <lastmod>2026-11-02T00:04:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circumcircle-construction-example/ssssswb8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circumcircle-construction-example/ssssswb8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circumcircle-construction-example/ssssswb8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circumcircle-construction-example/ssssswb8"/>
      <lastmod>2026-11-02T00:04:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plotting-function-graphs/ssssswbu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-function-graphs/ssssswbu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-function-graphs/ssssswbu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-function-graphs/ssssswbu"/>
      <lastmod>2026-11-02T18:39:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plotting-function-graphs/ssssswbu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-function-graphs/ssssswbu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-function-graphs/ssssswbu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-function-graphs/ssssswbu"/>
      <lastmod>2026-11-02T18:39:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mapping-cartesian-coordinates-to-polar-coordinates/ssssswb5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mapping-cartesian-coordinates-to-polar-coordinates/ssssswb5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mapping-cartesian-coordinates-to-polar-coordinates/ssssswb5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mapping-cartesian-coordinates-to-polar-coordinates/ssssswb5"/>
      <lastmod>2026-11-02T17:10:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mapping-cartesian-coordinates-to-polar-coordinates/ssssswb5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mapping-cartesian-coordinates-to-polar-coordinates/ssssswb5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mapping-cartesian-coordinates-to-polar-coordinates/ssssswb5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mapping-cartesian-coordinates-to-polar-coordinates/ssssswb5"/>
      <lastmod>2026-11-02T17:10:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-parallelograms-quadrilaterals/ssssswbb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-parallelograms-quadrilaterals/ssssswbb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-parallelograms-quadrilaterals/ssssswbb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-parallelograms-quadrilaterals/ssssswbb"/>
      <lastmod>2026-11-02T16:28:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-parallelograms-quadrilaterals/ssssswbb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-parallelograms-quadrilaterals/ssssswbb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-parallelograms-quadrilaterals/ssssswbb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-parallelograms-quadrilaterals/ssssswbb"/>
      <lastmod>2026-11-02T16:28:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-volume-and-cross-section/ssssswb3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-volume-and-cross-section/ssssswb3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-volume-and-cross-section/ssssswb3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-volume-and-cross-section/ssssswb3"/>
      <lastmod>2026-11-02T18:03:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-volume-and-cross-section/ssssswb3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-volume-and-cross-section/ssssswb3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-volume-and-cross-section/ssssswb3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-volume-and-cross-section/ssssswb3"/>
      <lastmod>2026-11-02T18:03:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-and-rectangular-coordinates-conversion-by-jamie-hansen/ssssswbq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-and-rectangular-coordinates-conversion-by-jamie-hansen/ssssswbq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-and-rectangular-coordinates-conversion-by-jamie-hansen/ssssswbq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-and-rectangular-coordinates-conversion-by-jamie-hansen/ssssswbq"/>
      <lastmod>2026-11-02T18:01:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-and-rectangular-coordinates-conversion-by-jamie-hansen/ssssswbq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-and-rectangular-coordinates-conversion-by-jamie-hansen/ssssswbq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-and-rectangular-coordinates-conversion-by-jamie-hansen/ssssswbq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-and-rectangular-coordinates-conversion-by-jamie-hansen/ssssswbq"/>
      <lastmod>2026-11-02T18:01:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilation-tool-example/ssssswb1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-tool-example/ssssswb1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-tool-example/ssssswb1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-tool-example/ssssswb1"/>
      <lastmod>2026-11-02T13:04:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilation-tool-example/ssssswb1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-tool-example/ssssswb1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-tool-example/ssssswb1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-tool-example/ssssswb1"/>
      <lastmod>2026-11-02T13:04:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/matching-histograms-to-boxplots/ssssswbm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matching-histograms-to-boxplots/ssssswbm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matching-histograms-to-boxplots/ssssswbm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matching-histograms-to-boxplots/ssssswbm"/>
      <lastmod>2026-11-02T18:10:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/matching-histograms-to-boxplots/ssssswbm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matching-histograms-to-boxplots/ssssswbm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matching-histograms-to-boxplots/ssssswbm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matching-histograms-to-boxplots/ssssswbm"/>
      <lastmod>2026-11-02T18:10:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-median/ssssswbj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-median/ssssswbj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-median/ssssswbj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-median/ssssswbj"/>
      <lastmod>2026-11-02T14:58:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-median/ssssswbj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-median/ssssswbj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-median/ssssswbj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-median/ssssswbj"/>
      <lastmod>2026-11-02T14:58:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-a-linear-system-using-elimination-lr6-02-cyu3/ssssswbp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-a-linear-system-using-elimination-lr6-02-cyu3/ssssswbp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-a-linear-system-using-elimination-lr6-02-cyu3/ssssswbp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-a-linear-system-using-elimination-lr6-02-cyu3/ssssswbp"/>
      <lastmod>2026-11-02T17:37:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-a-linear-system-using-elimination-lr6-02-cyu3/ssssswbp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-a-linear-system-using-elimination-lr6-02-cyu3/ssssswbp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-a-linear-system-using-elimination-lr6-02-cyu3/ssssswbp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-a-linear-system-using-elimination-lr6-02-cyu3/ssssswbp"/>
      <lastmod>2026-11-02T17:37:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/personae-of-a-circle-v1-1/ssssswbw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/personae-of-a-circle-v1-1/ssssswbw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/personae-of-a-circle-v1-1/ssssswbw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/personae-of-a-circle-v1-1/ssssswbw"/>
      <lastmod>2026-11-01T19:19:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/personae-of-a-circle-v1-1/ssssswbw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/personae-of-a-circle-v1-1/ssssswbw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/personae-of-a-circle-v1-1/ssssswbw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/personae-of-a-circle-v1-1/ssssswbw"/>
      <lastmod>2026-11-01T19:19:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-theorems-demonstration/ssssswb6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-theorems-demonstration/ssssswb6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-theorems-demonstration/ssssswb6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-theorems-demonstration/ssssswb6"/>
      <lastmod>2026-11-01T19:22:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-theorems-demonstration/ssssswb6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-theorems-demonstration/ssssswb6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-theorems-demonstration/ssssswb6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-theorems-demonstration/ssssswb6"/>
      <lastmod>2026-11-01T19:22:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rugby-shape-and-its-perimeter-by-spkwan-2/ssssswbg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rugby-shape-and-its-perimeter-by-spkwan-2/ssssswbg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rugby-shape-and-its-perimeter-by-spkwan-2/ssssswbg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rugby-shape-and-its-perimeter-by-spkwan-2/ssssswbg"/>
      <lastmod>2026-11-02T02:24:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rugby-shape-and-its-perimeter-by-spkwan-2/ssssswbg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rugby-shape-and-its-perimeter-by-spkwan-2/ssssswbg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rugby-shape-and-its-perimeter-by-spkwan-2/ssssswbg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rugby-shape-and-its-perimeter-by-spkwan-2/ssssswbg"/>
      <lastmod>2026-11-02T02:24:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-unfolded/ssssswb9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-unfolded/ssssswb9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-unfolded/ssssswb9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-unfolded/ssssswb9"/>
      <lastmod>2026-11-02T00:33:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-unfolded/ssssswb9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-unfolded/ssssswb9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-unfolded/ssssswb9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-unfolded/ssssswb9"/>
      <lastmod>2026-11-02T00:33:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-regular-octagons/ssssswbe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-regular-octagons/ssssswbe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-regular-octagons/ssssswbe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-regular-octagons/ssssswbe"/>
      <lastmod>2026-11-01T19:34:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-regular-octagons/ssssswbe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-regular-octagons/ssssswbe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-regular-octagons/ssssswbe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-regular-octagons/ssssswbe"/>
      <lastmod>2026-11-01T19:34:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-and-rectangular-prism-construction/ssssswbv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-and-rectangular-prism-construction/ssssswbv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-and-rectangular-prism-construction/ssssswbv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-and-rectangular-prism-construction/ssssswbv"/>
      <lastmod>2026-11-01T22:09:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-and-rectangular-prism-construction/ssssswbv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-and-rectangular-prism-construction/ssssswbv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-and-rectangular-prism-construction/ssssswbv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-and-rectangular-prism-construction/ssssswbv"/>
      <lastmod>2026-11-01T22:09:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/decimal-multiplication-demo/ssssswb4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-multiplication-demo/ssssswb4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-multiplication-demo/ssssswb4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-multiplication-demo/ssssswb4"/>
      <lastmod>2026-11-02T02:35:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/decimal-multiplication-demo/ssssswb4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/decimal-multiplication-demo/ssssswb4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/decimal-multiplication-demo/ssssswb4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/decimal-multiplication-demo/ssssswb4"/>
      <lastmod>2026-11-02T02:35:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-geogebra-illustration/ssssswbl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geogebra-illustration/ssssswbl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geogebra-illustration/ssssswbl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geogebra-illustration/ssssswbl"/>
      <lastmod>2026-11-02T17:07:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-geogebra-illustration/ssssswbl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geogebra-illustration/ssssswbl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geogebra-illustration/ssssswbl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geogebra-illustration/ssssswbl"/>
      <lastmod>2026-11-02T17:07:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-6-6-11-lesson-the-distributive-property-part-3/ssssswby</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-6-11-lesson-the-distributive-property-part-3/ssssswby"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-6-11-lesson-the-distributive-property-part-3/ssssswby"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-6-11-lesson-the-distributive-property-part-3/ssssswby"/>
      <lastmod>2026-11-02T10:37:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-6-6-11-lesson-the-distributive-property-part-3/ssssswby</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-6-11-lesson-the-distributive-property-part-3/ssssswby"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-6-11-lesson-the-distributive-property-part-3/ssssswby"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-6-11-lesson-the-distributive-property-part-3/ssssswby"/>
      <lastmod>2026-11-02T10:37:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plotting-parametric-equations/ssssswba</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-parametric-equations/ssssswba"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-parametric-equations/ssssswba"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-parametric-equations/ssssswba"/>
      <lastmod>2026-11-01T23:28:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plotting-parametric-equations/ssssswba</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-parametric-equations/ssssswba"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-parametric-equations/ssssswba"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-parametric-equations/ssssswba"/>
      <lastmod>2026-11-01T23:28:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spirograph-in-polar-coordinates/ssssswbc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spirograph-in-polar-coordinates/ssssswbc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spirograph-in-polar-coordinates/ssssswbc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spirograph-in-polar-coordinates/ssssswbc"/>
      <lastmod>2026-11-02T18:28:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spirograph-in-polar-coordinates/ssssswbc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spirograph-in-polar-coordinates/ssssswbc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spirograph-in-polar-coordinates/ssssswbc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spirograph-in-polar-coordinates/ssssswbc"/>
      <lastmod>2026-11-02T18:28:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/improved-guess-my-derivative/ssssswbr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/improved-guess-my-derivative/ssssswbr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/improved-guess-my-derivative/ssssswbr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/improved-guess-my-derivative/ssssswbr"/>
      <lastmod>2026-11-02T18:14:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/improved-guess-my-derivative/ssssswbr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/improved-guess-my-derivative/ssssswbr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/improved-guess-my-derivative/ssssswbr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/improved-guess-my-derivative/ssssswbr"/>
      <lastmod>2026-11-02T18:14:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/story-graph-matching/ssssswbh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/story-graph-matching/ssssswbh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/story-graph-matching/ssssswbh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/story-graph-matching/ssssswbh"/>
      <lastmod>2026-11-01T23:29:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/story-graph-matching/ssssswbh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/story-graph-matching/ssssswbh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/story-graph-matching/ssssswbh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/story-graph-matching/ssssswbh"/>
      <lastmod>2026-11-01T23:29:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mr-green-s-cube/ssssswbt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mr-green-s-cube/ssssswbt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mr-green-s-cube/ssssswbt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mr-green-s-cube/ssssswbt"/>
      <lastmod>2026-11-02T07:02:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mr-green-s-cube/ssssswbt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mr-green-s-cube/ssssswbt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mr-green-s-cube/ssssswbt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mr-green-s-cube/ssssswbt"/>
      <lastmod>2026-11-02T07:02:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/three-digit-numbers-demo/ssssswbx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-digit-numbers-demo/ssssswbx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-digit-numbers-demo/ssssswbx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-digit-numbers-demo/ssssswbx"/>
      <lastmod>2026-11-02T12:45:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/three-digit-numbers-demo/ssssswbx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-digit-numbers-demo/ssssswbx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-digit-numbers-demo/ssssswbx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-digit-numbers-demo/ssssswbx"/>
      <lastmod>2026-11-02T12:45:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ice-cream-bowls-modeling-demo/ssssswbi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ice-cream-bowls-modeling-demo/ssssswbi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ice-cream-bowls-modeling-demo/ssssswbi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ice-cream-bowls-modeling-demo/ssssswbi"/>
      <lastmod>2026-11-01T19:34:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ice-cream-bowls-modeling-demo/ssssswbi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ice-cream-bowls-modeling-demo/ssssswbi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ice-cream-bowls-modeling-demo/ssssswbi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ice-cream-bowls-modeling-demo/ssssswbi"/>
      <lastmod>2026-11-01T19:34:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ar-pythagoras-tree/ssssswbo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ar-pythagoras-tree/ssssswbo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ar-pythagoras-tree/ssssswbo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ar-pythagoras-tree/ssssswbo"/>
      <lastmod>2026-11-01T19:02:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ar-pythagoras-tree/ssssswbo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ar-pythagoras-tree/ssssswbo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ar-pythagoras-tree/ssssswbo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ar-pythagoras-tree/ssssswbo"/>
      <lastmod>2026-11-01T19:02:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-under-curve/sssssw3s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-under-curve/sssssw3s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-under-curve/sssssw3s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-under-curve/sssssw3s"/>
      <lastmod>2026-11-01T23:10:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-under-curve/sssssw3s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-under-curve/sssssw3s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-under-curve/sssssw3s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-under-curve/sssssw3s"/>
      <lastmod>2026-11-01T23:10:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-quadrilateral-area/sssssw37</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-quadrilateral-area/sssssw37"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-quadrilateral-area/sssssw37"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-quadrilateral-area/sssssw37"/>
      <lastmod>2026-11-02T10:51:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-quadrilateral-area/sssssw37</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-quadrilateral-area/sssssw37"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-quadrilateral-area/sssssw37"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-quadrilateral-area/sssssw37"/>
      <lastmod>2026-11-02T10:51:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-32230/sssssw3n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-32230/sssssw3n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-32230/sssssw3n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-32230/sssssw3n"/>
      <lastmod>2026-11-02T18:43:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-32230/sssssw3n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-32230/sssssw3n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-32230/sssssw3n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-32230/sssssw3n"/>
      <lastmod>2026-11-02T18:43:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-equilateral-triangles-demo/sssssw32</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-equilateral-triangles-demo/sssssw32"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-equilateral-triangles-demo/sssssw32"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-equilateral-triangles-demo/sssssw32"/>
      <lastmod>2026-11-02T17:57:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-equilateral-triangles-demo/sssssw32</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-equilateral-triangles-demo/sssssw32"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-equilateral-triangles-demo/sssssw32"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-equilateral-triangles-demo/sssssw32"/>
      <lastmod>2026-11-02T17:57:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-aujoe20/sssssw3k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-aujoe20/sssssw3k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-aujoe20/sssssw3k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-aujoe20/sssssw3k"/>
      <lastmod>2026-11-02T17:55:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-aujoe20/sssssw3k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-aujoe20/sssssw3k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-of-a-triangle-by-aujoe20/sssssw3k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-of-a-triangle-by-aujoe20/sssssw3k"/>
      <lastmod>2026-11-02T17:55:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practice-solving-linear-systems/sssssw3z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-solving-linear-systems/sssssw3z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-solving-linear-systems/sssssw3z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-solving-linear-systems/sssssw3z"/>
      <lastmod>2026-11-01T21:34:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practice-solving-linear-systems/sssssw3z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-solving-linear-systems/sssssw3z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-solving-linear-systems/sssssw3z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-solving-linear-systems/sssssw3z"/>
      <lastmod>2026-11-01T21:34:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sorting-rational-and-irrational-expressions/sssssw30</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sorting-rational-and-irrational-expressions/sssssw30"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sorting-rational-and-irrational-expressions/sssssw30"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sorting-rational-and-irrational-expressions/sssssw30"/>
      <lastmod>2026-11-01T20:50:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sorting-rational-and-irrational-expressions/sssssw30</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sorting-rational-and-irrational-expressions/sssssw30"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sorting-rational-and-irrational-expressions/sssssw30"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sorting-rational-and-irrational-expressions/sssssw30"/>
      <lastmod>2026-11-01T20:50:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interior-angles-of-regular-polygons-by-lew-w-s/sssssw3d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interior-angles-of-regular-polygons-by-lew-w-s/sssssw3d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interior-angles-of-regular-polygons-by-lew-w-s/sssssw3d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interior-angles-of-regular-polygons-by-lew-w-s/sssssw3d"/>
      <lastmod>2026-11-02T06:35:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interior-angles-of-regular-polygons-by-lew-w-s/sssssw3d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interior-angles-of-regular-polygons-by-lew-w-s/sssssw3d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interior-angles-of-regular-polygons-by-lew-w-s/sssssw3d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interior-angles-of-regular-polygons-by-lew-w-s/sssssw3d"/>
      <lastmod>2026-11-02T06:35:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-functions-standard-form/sssssw3f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-functions-standard-form/sssssw3f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-functions-standard-form/sssssw3f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-functions-standard-form/sssssw3f"/>
      <lastmod>2026-11-02T00:45:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-functions-standard-form/sssssw3f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-functions-standard-form/sssssw3f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-functions-standard-form/sssssw3f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-functions-standard-form/sssssw3f"/>
      <lastmod>2026-11-02T00:45:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-rectangular-prisms/sssssw38</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-rectangular-prisms/sssssw38"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-rectangular-prisms/sssssw38"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-rectangular-prisms/sssssw38"/>
      <lastmod>2026-11-02T18:17:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-rectangular-prisms/sssssw38</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-rectangular-prisms/sssssw38"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-rectangular-prisms/sssssw38"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-rectangular-prisms/sssssw38"/>
      <lastmod>2026-11-02T18:17:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-orthocenter-construction/sssssw3u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-orthocenter-construction/sssssw3u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-orthocenter-construction/sssssw3u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-orthocenter-construction/sssssw3u"/>
      <lastmod>2026-11-02T17:48:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-orthocenter-construction/sssssw3u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-orthocenter-construction/sssssw3u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-orthocenter-construction/sssssw3u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-orthocenter-construction/sssssw3u"/>
      <lastmod>2026-11-02T17:48:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/new-theorem-of-pythagoras-circle/sssssw35</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/new-theorem-of-pythagoras-circle/sssssw35"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/new-theorem-of-pythagoras-circle/sssssw35"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/new-theorem-of-pythagoras-circle/sssssw35"/>
      <lastmod>2026-11-01T21:34:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/new-theorem-of-pythagoras-circle/sssssw35</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/new-theorem-of-pythagoras-circle/sssssw35"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/new-theorem-of-pythagoras-circle/sssssw35"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/new-theorem-of-pythagoras-circle/sssssw35"/>
      <lastmod>2026-11-01T21:34:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-a-circle-wedge-demo/sssssw3b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-circle-wedge-demo/sssssw3b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-circle-wedge-demo/sssssw3b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-circle-wedge-demo/sssssw3b"/>
      <lastmod>2026-11-01T19:28:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-a-circle-wedge-demo/sssssw3b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-circle-wedge-demo/sssssw3b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-circle-wedge-demo/sssssw3b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-circle-wedge-demo/sssssw3b"/>
      <lastmod>2026-11-01T19:28:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fermat-point-associated-equilateral-triangle/sssssw33</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fermat-point-associated-equilateral-triangle/sssssw33"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fermat-point-associated-equilateral-triangle/sssssw33"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fermat-point-associated-equilateral-triangle/sssssw33"/>
      <lastmod>2026-11-01T23:17:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fermat-point-associated-equilateral-triangle/sssssw33</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fermat-point-associated-equilateral-triangle/sssssw33"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fermat-point-associated-equilateral-triangle/sssssw33"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fermat-point-associated-equilateral-triangle/sssssw33"/>
      <lastmod>2026-11-01T23:17:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ssa-triangle-demonstration/sssssw3q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ssa-triangle-demonstration/sssssw3q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ssa-triangle-demonstration/sssssw3q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ssa-triangle-demonstration/sssssw3q"/>
      <lastmod>2026-11-02T16:55:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ssa-triangle-demonstration/sssssw3q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ssa-triangle-demonstration/sssssw3q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ssa-triangle-demonstration/sssssw3q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ssa-triangle-demonstration/sssssw3q"/>
      <lastmod>2026-11-02T16:55:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/law-of-sines-part-1/sssssw31</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-sines-part-1/sssssw31"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-sines-part-1/sssssw31"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-sines-part-1/sssssw31"/>
      <lastmod>2026-11-01T19:20:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/law-of-sines-part-1/sssssw31</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-sines-part-1/sssssw31"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-sines-part-1/sssssw31"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-sines-part-1/sssssw31"/>
      <lastmod>2026-11-01T19:20:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/covariant-and-contravariant-vector-components/sssssw3m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/covariant-and-contravariant-vector-components/sssssw3m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/covariant-and-contravariant-vector-components/sssssw3m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/covariant-and-contravariant-vector-components/sssssw3m"/>
      <lastmod>2026-11-02T18:24:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/covariant-and-contravariant-vector-components/sssssw3m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/covariant-and-contravariant-vector-components/sssssw3m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/covariant-and-contravariant-vector-components/sssssw3m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/covariant-and-contravariant-vector-components/sssssw3m"/>
      <lastmod>2026-11-02T18:24:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/what-is-a-cobweb-diagram/sssssw3j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/what-is-a-cobweb-diagram/sssssw3j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/what-is-a-cobweb-diagram/sssssw3j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/what-is-a-cobweb-diagram/sssssw3j"/>
      <lastmod>2026-11-02T17:04:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/what-is-a-cobweb-diagram/sssssw3j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/what-is-a-cobweb-diagram/sssssw3j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/what-is-a-cobweb-diagram/sssssw3j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/what-is-a-cobweb-diagram/sssssw3j"/>
      <lastmod>2026-11-02T17:04:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-front-side-top-elevation-drawing/sssssw3p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-front-side-top-elevation-drawing/sssssw3p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-front-side-top-elevation-drawing/sssssw3p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-front-side-top-elevation-drawing/sssssw3p"/>
      <lastmod>2026-11-02T16:56:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-front-side-top-elevation-drawing/sssssw3p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-front-side-top-elevation-drawing/sssssw3p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-front-side-top-elevation-drawing/sssssw3p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-front-side-top-elevation-drawing/sssssw3p"/>
      <lastmod>2026-11-02T16:56:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/point-functions-on-a-line-exercise/sssssw3w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-functions-on-a-line-exercise/sssssw3w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-functions-on-a-line-exercise/sssssw3w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-functions-on-a-line-exercise/sssssw3w"/>
      <lastmod>2026-11-02T13:42:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/point-functions-on-a-line-exercise/sssssw3w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-functions-on-a-line-exercise/sssssw3w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-functions-on-a-line-exercise/sssssw3w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-functions-on-a-line-exercise/sssssw3w"/>
      <lastmod>2026-11-02T13:42:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a-perfect-square-grayscale/sssssw36</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-perfect-square-grayscale/sssssw36"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-perfect-square-grayscale/sssssw36"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-perfect-square-grayscale/sssssw36"/>
      <lastmod>2026-11-02T16:34:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a-perfect-square-grayscale/sssssw36</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-perfect-square-grayscale/sssssw36"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-perfect-square-grayscale/sssssw36"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-perfect-square-grayscale/sssssw36"/>
      <lastmod>2026-11-02T16:34:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/one-point-perspective-room-drawing/sssssw3g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-point-perspective-room-drawing/sssssw3g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-point-perspective-room-drawing/sssssw3g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-point-perspective-room-drawing/sssssw3g"/>
      <lastmod>2026-11-02T02:41:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/one-point-perspective-room-drawing/sssssw3g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/one-point-perspective-room-drawing/sssssw3g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/one-point-perspective-room-drawing/sssssw3g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/one-point-perspective-room-drawing/sssssw3g"/>
      <lastmod>2026-11-02T02:41:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/n-gon-interior-angles/sssssw39</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/n-gon-interior-angles/sssssw39"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/n-gon-interior-angles/sssssw39"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/n-gon-interior-angles/sssssw39"/>
      <lastmod>2026-11-02T00:49:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/n-gon-interior-angles/sssssw39</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/n-gon-interior-angles/sssssw39"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/n-gon-interior-angles/sssssw39"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/n-gon-interior-angles/sssssw39"/>
      <lastmod>2026-11-02T00:49:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-a-parallelogram-by-powere/sssssw3e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-parallelogram-by-powere/sssssw3e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-parallelogram-by-powere/sssssw3e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-parallelogram-by-powere/sssssw3e"/>
      <lastmod>2026-11-02T17:41:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-a-parallelogram-by-powere/sssssw3e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-a-parallelogram-by-powere/sssssw3e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-a-parallelogram-by-powere/sssssw3e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-a-parallelogram-by-powere/sssssw3e"/>
      <lastmod>2026-11-02T17:41:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/subtracting-rational-numbers-number-line-and-difference-im-7-5-6-lesson/sssssw3v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtracting-rational-numbers-number-line-and-difference-im-7-5-6-lesson/sssssw3v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtracting-rational-numbers-number-line-and-difference-im-7-5-6-lesson/sssssw3v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtracting-rational-numbers-number-line-and-difference-im-7-5-6-lesson/sssssw3v"/>
      <lastmod>2026-11-01T20:20:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/subtracting-rational-numbers-number-line-and-difference-im-7-5-6-lesson/sssssw3v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtracting-rational-numbers-number-line-and-difference-im-7-5-6-lesson/sssssw3v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtracting-rational-numbers-number-line-and-difference-im-7-5-6-lesson/sssssw3v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtracting-rational-numbers-number-line-and-difference-im-7-5-6-lesson/sssssw3v"/>
      <lastmod>2026-11-01T20:20:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-law-demonstration-by-cemccourseware/sssssw34</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-law-demonstration-by-cemccourseware/sssssw34"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-law-demonstration-by-cemccourseware/sssssw34"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-law-demonstration-by-cemccourseware/sssssw34"/>
      <lastmod>2026-11-01T23:55:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-law-demonstration-by-cemccourseware/sssssw34</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-law-demonstration-by-cemccourseware/sssssw34"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-law-demonstration-by-cemccourseware/sssssw34"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-law-demonstration-by-cemccourseware/sssssw34"/>
      <lastmod>2026-11-01T23:55:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-and-tree-diagram-demo/sssssw3l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-and-tree-diagram-demo/sssssw3l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-and-tree-diagram-demo/sssssw3l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-and-tree-diagram-demo/sssssw3l"/>
      <lastmod>2026-11-01T21:30:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-and-tree-diagram-demo/sssssw3l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-and-tree-diagram-demo/sssssw3l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-and-tree-diagram-demo/sssssw3l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-and-tree-diagram-demo/sssssw3l"/>
      <lastmod>2026-11-01T21:30:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/icosahedron-star-construction/sssssw3y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/icosahedron-star-construction/sssssw3y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/icosahedron-star-construction/sssssw3y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/icosahedron-star-construction/sssssw3y"/>
      <lastmod>2026-11-02T17:39:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/icosahedron-star-construction/sssssw3y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/icosahedron-star-construction/sssssw3y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/icosahedron-star-construction/sssssw3y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/icosahedron-star-construction/sssssw3y"/>
      <lastmod>2026-11-02T17:39:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/stat300-binomial-distribution-histogram/sssssw3a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/stat300-binomial-distribution-histogram/sssssw3a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/stat300-binomial-distribution-histogram/sssssw3a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/stat300-binomial-distribution-histogram/sssssw3a"/>
      <lastmod>2026-11-01T21:15:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/stat300-binomial-distribution-histogram/sssssw3a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/stat300-binomial-distribution-histogram/sssssw3a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/stat300-binomial-distribution-histogram/sssssw3a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/stat300-binomial-distribution-histogram/sssssw3a"/>
      <lastmod>2026-11-01T21:15:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-addition-equations-using-scales/sssssw3c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-addition-equations-using-scales/sssssw3c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-addition-equations-using-scales/sssssw3c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-addition-equations-using-scales/sssssw3c"/>
      <lastmod>2026-11-02T16:52:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-addition-equations-using-scales/sssssw3c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-addition-equations-using-scales/sssssw3c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-addition-equations-using-scales/sssssw3c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-addition-equations-using-scales/sssssw3c"/>
      <lastmod>2026-11-02T16:52:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prim-s-algorithm-visualizing-minimum-spanning-tree-construction/sssssw3r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prim-s-algorithm-visualizing-minimum-spanning-tree-construction/sssssw3r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prim-s-algorithm-visualizing-minimum-spanning-tree-construction/sssssw3r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prim-s-algorithm-visualizing-minimum-spanning-tree-construction/sssssw3r"/>
      <lastmod>2026-11-02T00:17:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prim-s-algorithm-visualizing-minimum-spanning-tree-construction/sssssw3r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prim-s-algorithm-visualizing-minimum-spanning-tree-construction/sssssw3r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prim-s-algorithm-visualizing-minimum-spanning-tree-construction/sssssw3r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prim-s-algorithm-visualizing-minimum-spanning-tree-construction/sssssw3r"/>
      <lastmod>2026-11-02T00:17:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-sides-investigation/sssssw3h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-sides-investigation/sssssw3h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-sides-investigation/sssssw3h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-sides-investigation/sssssw3h"/>
      <lastmod>2026-11-02T12:01:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-sides-investigation/sssssw3h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-sides-investigation/sssssw3h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-sides-investigation/sssssw3h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-sides-investigation/sssssw3h"/>
      <lastmod>2026-11-02T12:01:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-angle-sum-demonstration/sssssw3t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-angle-sum-demonstration/sssssw3t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-angle-sum-demonstration/sssssw3t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-angle-sum-demonstration/sssssw3t"/>
      <lastmod>2026-11-02T13:45:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-angle-sum-demonstration/sssssw3t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-angle-sum-demonstration/sssssw3t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-angle-sum-demonstration/sssssw3t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-angle-sum-demonstration/sssssw3t"/>
      <lastmod>2026-11-02T13:45:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-with-triangles-demo/sssssw3x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-with-triangles-demo/sssssw3x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-with-triangles-demo/sssssw3x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-with-triangles-demo/sssssw3x"/>
      <lastmod>2026-11-01T19:12:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-with-triangles-demo/sssssw3x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-with-triangles-demo/sssssw3x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-with-triangles-demo/sssssw3x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-with-triangles-demo/sssssw3x"/>
      <lastmod>2026-11-01T19:12:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/analogy-between-statics-and-geometry/sssssw3i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/analogy-between-statics-and-geometry/sssssw3i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/analogy-between-statics-and-geometry/sssssw3i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/analogy-between-statics-and-geometry/sssssw3i"/>
      <lastmod>2026-11-02T18:13:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/analogy-between-statics-and-geometry/sssssw3i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/analogy-between-statics-and-geometry/sssssw3i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/analogy-between-statics-and-geometry/sssssw3i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/analogy-between-statics-and-geometry/sssssw3i"/>
      <lastmod>2026-11-02T18:13:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-distribution-hypothesis-testing/sssssw3o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-hypothesis-testing/sssssw3o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-hypothesis-testing/sssssw3o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-hypothesis-testing/sssssw3o"/>
      <lastmod>2026-11-01T21:34:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-distribution-hypothesis-testing/sssssw3o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-hypothesis-testing/sssssw3o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-hypothesis-testing/sssssw3o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-hypothesis-testing/sssssw3o"/>
      <lastmod>2026-11-01T21:34:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-sphere-and-cone-by-walter-f-chte/ssssswqs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-sphere-and-cone-by-walter-f-chte/ssssswqs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-sphere-and-cone-by-walter-f-chte/ssssswqs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-sphere-and-cone-by-walter-f-chte/ssssswqs"/>
      <lastmod>2026-11-02T17:41:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-sphere-and-cone-by-walter-f-chte/ssssswqs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-sphere-and-cone-by-walter-f-chte/ssssswqs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-sphere-and-cone-by-walter-f-chte/ssssswqs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-sphere-and-cone-by-walter-f-chte/ssssswqs"/>
      <lastmod>2026-11-02T17:41:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygon-and-matrix-transformation/ssssswq7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-and-matrix-transformation/ssssswq7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-and-matrix-transformation/ssssswq7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-and-matrix-transformation/ssssswq7"/>
      <lastmod>2026-11-01T19:15:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygon-and-matrix-transformation/ssssswq7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-and-matrix-transformation/ssssswq7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-and-matrix-transformation/ssssswq7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-and-matrix-transformation/ssssswq7"/>
      <lastmod>2026-11-01T19:15:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/archytas-curve/ssssswqn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/archytas-curve/ssssswqn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/archytas-curve/ssssswqn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/archytas-curve/ssssswqn"/>
      <lastmod>2026-11-02T00:21:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/archytas-curve/ssssswqn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/archytas-curve/ssssswqn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/archytas-curve/ssssswqn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/archytas-curve/ssssswqn"/>
      <lastmod>2026-11-02T00:21:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/eigenvalues-eigenvectors/ssssswq2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eigenvalues-eigenvectors/ssssswq2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eigenvalues-eigenvectors/ssssswq2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eigenvalues-eigenvectors/ssssswq2"/>
      <lastmod>2026-11-02T16:39:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/eigenvalues-eigenvectors/ssssswq2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eigenvalues-eigenvectors/ssssswq2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eigenvalues-eigenvectors/ssssswq2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eigenvalues-eigenvectors/ssssswq2"/>
      <lastmod>2026-11-02T16:39:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/is-saa-a-congruence-shortcut/ssssswqk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/is-saa-a-congruence-shortcut/ssssswqk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/is-saa-a-congruence-shortcut/ssssswqk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/is-saa-a-congruence-shortcut/ssssswqk"/>
      <lastmod>2026-11-02T13:07:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/is-saa-a-congruence-shortcut/ssssswqk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/is-saa-a-congruence-shortcut/ssssswqk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/is-saa-a-congruence-shortcut/ssssswqk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/is-saa-a-congruence-shortcut/ssssswqk"/>
      <lastmod>2026-11-02T13:07:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-trigonometric-functions/ssssswqz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-trigonometric-functions/ssssswqz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-trigonometric-functions/ssssswqz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-trigonometric-functions/ssssswqz"/>
      <lastmod>2026-11-02T06:05:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-of-trigonometric-functions/ssssswqz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-trigonometric-functions/ssssswqz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-trigonometric-functions/ssssswqz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-trigonometric-functions/ssssswqz"/>
      <lastmod>2026-11-02T06:05:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-two-geometric-means/ssssswq0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-two-geometric-means/ssssswq0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-two-geometric-means/ssssswq0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-two-geometric-means/ssssswq0"/>
      <lastmod>2026-11-02T08:44:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-two-geometric-means/ssssswq0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-two-geometric-means/ssssswq0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-two-geometric-means/ssssswq0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-two-geometric-means/ssssswq0"/>
      <lastmod>2026-11-02T08:44:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/first-degree-equations-practice-random-generation-and-instant-feedback/ssssswqd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/first-degree-equations-practice-random-generation-and-instant-feedback/ssssswqd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/first-degree-equations-practice-random-generation-and-instant-feedback/ssssswqd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/first-degree-equations-practice-random-generation-and-instant-feedback/ssssswqd"/>
      <lastmod>2026-11-02T18:57:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/first-degree-equations-practice-random-generation-and-instant-feedback/ssssswqd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/first-degree-equations-practice-random-generation-and-instant-feedback/ssssswqd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/first-degree-equations-practice-random-generation-and-instant-feedback/ssssswqd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/first-degree-equations-practice-random-generation-and-instant-feedback/ssssswqd"/>
      <lastmod>2026-11-02T18:57:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-of-a-binomial/ssssswqf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-of-a-binomial/ssssswqf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-of-a-binomial/ssssswqf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-of-a-binomial/ssssswqf"/>
      <lastmod>2026-11-02T16:49:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-of-a-binomial/ssssswqf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-of-a-binomial/ssssswqf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-of-a-binomial/ssssswqf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-of-a-binomial/ssssswqf"/>
      <lastmod>2026-11-02T16:49:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-a-triangle-by-chris-cambr/ssssswq8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-triangle-by-chris-cambr/ssssswq8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-triangle-by-chris-cambr/ssssswq8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-triangle-by-chris-cambr/ssssswq8"/>
      <lastmod>2026-11-02T17:17:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-a-triangle-by-chris-cambr/ssssswq8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-triangle-by-chris-cambr/ssssswq8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-triangle-by-chris-cambr/ssssswq8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-triangle-by-chris-cambr/ssssswq8"/>
      <lastmod>2026-11-02T17:17:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstrating-the-area-of-a-parallelogram-formula/ssssswqu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-the-area-of-a-parallelogram-formula/ssssswqu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-the-area-of-a-parallelogram-formula/ssssswqu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-the-area-of-a-parallelogram-formula/ssssswqu"/>
      <lastmod>2026-11-02T08:37:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstrating-the-area-of-a-parallelogram-formula/ssssswqu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-the-area-of-a-parallelogram-formula/ssssswqu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-the-area-of-a-parallelogram-formula/ssssswqu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-the-area-of-a-parallelogram-formula/ssssswqu"/>
      <lastmod>2026-11-02T08:37:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angles-of-polygons-discovery/ssssswq5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-of-polygons-discovery/ssssswq5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-of-polygons-discovery/ssssswq5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-of-polygons-discovery/ssssswq5"/>
      <lastmod>2026-11-02T15:05:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angles-of-polygons-discovery/ssssswq5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-of-polygons-discovery/ssssswq5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-of-polygons-discovery/ssssswq5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-of-polygons-discovery/ssssswq5"/>
      <lastmod>2026-11-02T15:05:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/draw-a-parabola/ssssswqb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-a-parabola/ssssswqb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-a-parabola/ssssswqb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-a-parabola/ssssswqb"/>
      <lastmod>2026-11-02T03:10:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/draw-a-parabola/ssssswqb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-a-parabola/ssssswqb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-a-parabola/ssssswqb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-a-parabola/ssssswqb"/>
      <lastmod>2026-11-02T03:10:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cross-sections-of-a-pyramid/ssssswq3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-pyramid/ssssswq3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-sections-of-a-pyramid/ssssswq3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-pyramid/ssssswq3"/>
      <lastmod>2026-11-02T07:35:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cross-sections-of-a-pyramid/ssssswq3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-pyramid/ssssswq3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-sections-of-a-pyramid/ssssswq3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-pyramid/ssssswq3"/>
      <lastmod>2026-11-02T07:35:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-construction-demo-by-alexandria-tristram/ssssswqq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-demo-by-alexandria-tristram/ssssswqq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-demo-by-alexandria-tristram/ssssswqq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-demo-by-alexandria-tristram/ssssswqq"/>
      <lastmod>2026-11-02T12:21:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-construction-demo-by-alexandria-tristram/ssssswqq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-demo-by-alexandria-tristram/ssssswqq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-demo-by-alexandria-tristram/ssssswqq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-demo-by-alexandria-tristram/ssssswqq"/>
      <lastmod>2026-11-02T12:21:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-a-visual-proof-with-dynamic-geometry/ssssswq1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-a-visual-proof-with-dynamic-geometry/ssssswq1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-a-visual-proof-with-dynamic-geometry/ssssswq1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-a-visual-proof-with-dynamic-geometry/ssssswq1"/>
      <lastmod>2026-11-02T17:35:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-a-visual-proof-with-dynamic-geometry/ssssswq1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-a-visual-proof-with-dynamic-geometry/ssssswq1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-a-visual-proof-with-dynamic-geometry/ssssswq1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-a-visual-proof-with-dynamic-geometry/ssssswq1"/>
      <lastmod>2026-11-02T17:35:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/arithmetic-spirals/ssssswqm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-spirals/ssssswqm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-spirals/ssssswqm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-spirals/ssssswqm"/>
      <lastmod>2026-11-01T21:19:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/arithmetic-spirals/ssssswqm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/arithmetic-spirals/ssssswqm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/arithmetic-spirals/ssssswqm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/arithmetic-spirals/ssssswqm"/>
      <lastmod>2026-11-01T21:19:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/string-art-and-symmetry-sofia-s-geometric-creation/ssssswqj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/string-art-and-symmetry-sofia-s-geometric-creation/ssssswqj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/string-art-and-symmetry-sofia-s-geometric-creation/ssssswqj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/string-art-and-symmetry-sofia-s-geometric-creation/ssssswqj"/>
      <lastmod>2026-11-02T16:38:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/string-art-and-symmetry-sofia-s-geometric-creation/ssssswqj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/string-art-and-symmetry-sofia-s-geometric-creation/ssssswqj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/string-art-and-symmetry-sofia-s-geometric-creation/ssssswqj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/string-art-and-symmetry-sofia-s-geometric-creation/ssssswqj"/>
      <lastmod>2026-11-02T16:38:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-area-calculation-by-jorge-c-ssio/ssssswqp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-area-calculation-by-jorge-c-ssio/ssssswqp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-area-calculation-by-jorge-c-ssio/ssssswqp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-area-calculation-by-jorge-c-ssio/ssssswqp"/>
      <lastmod>2026-11-01T19:12:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-area-calculation-by-jorge-c-ssio/ssssswqp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-area-calculation-by-jorge-c-ssio/ssssswqp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-area-calculation-by-jorge-c-ssio/ssssswqp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-area-calculation-by-jorge-c-ssio/ssssswqp"/>
      <lastmod>2026-11-01T19:12:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/truncated-octahedron-by-chris-cambr/ssssswqw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-octahedron-by-chris-cambr/ssssswqw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-octahedron-by-chris-cambr/ssssswqw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-octahedron-by-chris-cambr/ssssswqw"/>
      <lastmod>2026-11-02T10:44:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/truncated-octahedron-by-chris-cambr/ssssswqw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-octahedron-by-chris-cambr/ssssswqw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-octahedron-by-chris-cambr/ssssswqw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-octahedron-by-chris-cambr/ssssswqw"/>
      <lastmod>2026-11-02T10:44:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-vectors-and-parabolas/ssssswq6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-vectors-and-parabolas/ssssswq6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-vectors-and-parabolas/ssssswq6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-vectors-and-parabolas/ssssswq6"/>
      <lastmod>2026-11-02T17:38:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-vectors-and-parabolas/ssssswq6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-vectors-and-parabolas/ssssswq6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-vectors-and-parabolas/ssssswq6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-vectors-and-parabolas/ssssswq6"/>
      <lastmod>2026-11-02T17:38:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/taylor-surface/ssssswqg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/taylor-surface/ssssswqg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/taylor-surface/ssssswqg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/taylor-surface/ssssswqg"/>
      <lastmod>2026-11-01T21:10:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/taylor-surface/ssssswqg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/taylor-surface/ssssswqg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/taylor-surface/ssssswqg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/taylor-surface/ssssswqg"/>
      <lastmod>2026-11-01T21:10:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/45-45-90-triangle-quick-investigation/ssssswq9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/45-45-90-triangle-quick-investigation/ssssswq9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/45-45-90-triangle-quick-investigation/ssssswq9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/45-45-90-triangle-quick-investigation/ssssswq9"/>
      <lastmod>2026-11-01T23:20:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/45-45-90-triangle-quick-investigation/ssssswq9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/45-45-90-triangle-quick-investigation/ssssswq9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/45-45-90-triangle-quick-investigation/ssssswq9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/45-45-90-triangle-quick-investigation/ssssswq9"/>
      <lastmod>2026-11-01T23:20:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/representations-of-sequences/ssssswqe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/representations-of-sequences/ssssswqe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/representations-of-sequences/ssssswqe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/representations-of-sequences/ssssswqe"/>
      <lastmod>2026-11-01T23:36:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/representations-of-sequences/ssssswqe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/representations-of-sequences/ssssswqe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/representations-of-sequences/ssssswqe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/representations-of-sequences/ssssswqe"/>
      <lastmod>2026-11-01T23:36:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/functions-relation-square-notice-wonder/ssssswqv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/functions-relation-square-notice-wonder/ssssswqv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/functions-relation-square-notice-wonder/ssssswqv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/functions-relation-square-notice-wonder/ssssswqv"/>
      <lastmod>2026-11-02T09:39:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/functions-relation-square-notice-wonder/ssssswqv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/functions-relation-square-notice-wonder/ssssswqv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/functions-relation-square-notice-wonder/ssssswqv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/functions-relation-square-notice-wonder/ssssswqv"/>
      <lastmod>2026-11-02T09:39:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-sine-curve/ssssswq4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-sine-curve/ssssswq4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-sine-curve/ssssswq4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-sine-curve/ssssswq4"/>
      <lastmod>2026-11-02T02:49:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-sine-curve/ssssswq4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-sine-curve/ssssswq4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-sine-curve/ssssswq4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-sine-curve/ssssswq4"/>
      <lastmod>2026-11-02T02:49:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-of-sin-curves/ssssswql</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-of-sin-curves/ssssswql"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-of-sin-curves/ssssswql"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-of-sin-curves/ssssswql"/>
      <lastmod>2026-11-01T20:18:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-of-sin-curves/ssssswql</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-of-sin-curves/ssssswql"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-of-sin-curves/ssssswql"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-of-sin-curves/ssssswql"/>
      <lastmod>2026-11-01T20:18:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-inscribed-in-a-cube-geometric-construction/ssssswqy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-inscribed-in-a-cube-geometric-construction/ssssswqy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-inscribed-in-a-cube-geometric-construction/ssssswqy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-inscribed-in-a-cube-geometric-construction/ssssswqy"/>
      <lastmod>2026-11-01T21:36:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-inscribed-in-a-cube-geometric-construction/ssssswqy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-inscribed-in-a-cube-geometric-construction/ssssswqy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-inscribed-in-a-cube-geometric-construction/ssssswqy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-inscribed-in-a-cube-geometric-construction/ssssswqy"/>
      <lastmod>2026-11-01T21:36:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practice-factoring-trinomials-by-lindseyrowland/ssssswqa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-factoring-trinomials-by-lindseyrowland/ssssswqa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-factoring-trinomials-by-lindseyrowland/ssssswqa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-factoring-trinomials-by-lindseyrowland/ssssswqa"/>
      <lastmod>2026-11-02T18:06:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practice-factoring-trinomials-by-lindseyrowland/ssssswqa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-factoring-trinomials-by-lindseyrowland/ssssswqa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-factoring-trinomials-by-lindseyrowland/ssssswqa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-factoring-trinomials-by-lindseyrowland/ssssswqa"/>
      <lastmod>2026-11-02T18:06:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-exploration-random-experiments-and-inequality-verification/ssssswqc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-exploration-random-experiments-and-inequality-verification/ssssswqc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-exploration-random-experiments-and-inequality-verification/ssssswqc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-exploration-random-experiments-and-inequality-verification/ssssswqc"/>
      <lastmod>2026-11-02T00:15:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-exploration-random-experiments-and-inequality-verification/ssssswqc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-exploration-random-experiments-and-inequality-verification/ssssswqc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-exploration-random-experiments-and-inequality-verification/ssssswqc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-exploration-random-experiments-and-inequality-verification/ssssswqc"/>
      <lastmod>2026-11-02T00:15:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-volume-calculation-demo-by-bscott01/ssssswqr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-demo-by-bscott01/ssssswqr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-volume-calculation-demo-by-bscott01/ssssswqr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-demo-by-bscott01/ssssswqr"/>
      <lastmod>2026-11-02T13:02:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-volume-calculation-demo-by-bscott01/ssssswqr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-demo-by-bscott01/ssssswqr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-volume-calculation-demo-by-bscott01/ssssswqr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-volume-calculation-demo-by-bscott01/ssssswqr"/>
      <lastmod>2026-11-02T13:02:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-of-sine-addition-formula-a-geometric-approach/ssssswqh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-sine-addition-formula-a-geometric-approach/ssssswqh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-sine-addition-formula-a-geometric-approach/ssssswqh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-sine-addition-formula-a-geometric-approach/ssssswqh"/>
      <lastmod>2026-11-02T12:22:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-of-sine-addition-formula-a-geometric-approach/ssssswqh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-sine-addition-formula-a-geometric-approach/ssssswqh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-sine-addition-formula-a-geometric-approach/ssssswqh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-sine-addition-formula-a-geometric-approach/ssssswqh"/>
      <lastmod>2026-11-02T12:22:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/renaming-objects/ssssswqt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/renaming-objects/ssssswqt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/renaming-objects/ssssswqt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/renaming-objects/ssssswqt"/>
      <lastmod>2026-11-01T23:23:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/renaming-objects/ssssswqt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/renaming-objects/ssssswqt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/renaming-objects/ssssswqt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/renaming-objects/ssssswqt"/>
      <lastmod>2026-11-01T23:23:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vertex-form/ssssswqx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertex-form/ssssswqx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertex-form/ssssswqx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertex-form/ssssswqx"/>
      <lastmod>2026-11-01T23:42:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vertex-form/ssssswqx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertex-form/ssssswqx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertex-form/ssssswqx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertex-form/ssssswqx"/>
      <lastmod>2026-11-01T23:42:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-addition-and-subtraction-demonstration/ssssswqi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-addition-and-subtraction-demonstration/ssssswqi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-addition-and-subtraction-demonstration/ssssswqi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-addition-and-subtraction-demonstration/ssssswqi"/>
      <lastmod>2026-11-02T03:05:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-addition-and-subtraction-demonstration/ssssswqi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-addition-and-subtraction-demonstration/ssssswqi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-addition-and-subtraction-demonstration/ssssswqi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-addition-and-subtraction-demonstration/ssssswqi"/>
      <lastmod>2026-11-02T03:05:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-function-demo/ssssswqo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-function-demo/ssssswqo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-function-demo/ssssswqo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-function-demo/ssssswqo"/>
      <lastmod>2026-11-02T18:16:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-function-demo/ssssswqo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-function-demo/ssssswqo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-function-demo/ssssswqo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-function-demo/ssssswqo"/>
      <lastmod>2026-11-02T18:16:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dot-plot-how-a-data-value-affects-statistics/sssssw1s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dot-plot-how-a-data-value-affects-statistics/sssssw1s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dot-plot-how-a-data-value-affects-statistics/sssssw1s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dot-plot-how-a-data-value-affects-statistics/sssssw1s"/>
      <lastmod>2026-11-01T23:42:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dot-plot-how-a-data-value-affects-statistics/sssssw1s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dot-plot-how-a-data-value-affects-statistics/sssssw1s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dot-plot-how-a-data-value-affects-statistics/sssssw1s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dot-plot-how-a-data-value-affects-statistics/sssssw1s"/>
      <lastmod>2026-11-01T23:42:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-modular-addition-and-inverse-on-circular-representation/sssssw17</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-modular-addition-and-inverse-on-circular-representation/sssssw17"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-modular-addition-and-inverse-on-circular-representation/sssssw17"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-modular-addition-and-inverse-on-circular-representation/sssssw17"/>
      <lastmod>2026-11-02T00:27:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-modular-addition-and-inverse-on-circular-representation/sssssw17</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-modular-addition-and-inverse-on-circular-representation/sssssw17"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-modular-addition-and-inverse-on-circular-representation/sssssw17"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-modular-addition-and-inverse-on-circular-representation/sssssw17"/>
      <lastmod>2026-11-02T00:27:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-between-planes/sssssw1n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-planes/sssssw1n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-planes/sssssw1n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-planes/sssssw1n"/>
      <lastmod>2026-11-01T23:48:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-between-planes/sssssw1n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-between-planes/sssssw1n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-between-planes/sssssw1n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-between-planes/sssssw1n"/>
      <lastmod>2026-11-01T23:48:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/matching-like-terms-by-edward-knote/sssssw12</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matching-like-terms-by-edward-knote/sssssw12"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matching-like-terms-by-edward-knote/sssssw12"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matching-like-terms-by-edward-knote/sssssw12"/>
      <lastmod>2026-11-02T18:58:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/matching-like-terms-by-edward-knote/sssssw12</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matching-like-terms-by-edward-knote/sssssw12"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matching-like-terms-by-edward-knote/sssssw12"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matching-like-terms-by-edward-knote/sssssw12"/>
      <lastmod>2026-11-02T18:58:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-slopes-and-equations-of-linear-functions/sssssw1k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-slopes-and-equations-of-linear-functions/sssssw1k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-slopes-and-equations-of-linear-functions/sssssw1k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-slopes-and-equations-of-linear-functions/sssssw1k"/>
      <lastmod>2026-11-01T21:22:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-slopes-and-equations-of-linear-functions/sssssw1k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-slopes-and-equations-of-linear-functions/sssssw1k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-slopes-and-equations-of-linear-functions/sssssw1k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-slopes-and-equations-of-linear-functions/sssssw1k"/>
      <lastmod>2026-11-01T21:22:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-and-derivative-relationship-demo/sssssw1z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-and-derivative-relationship-demo/sssssw1z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-and-derivative-relationship-demo/sssssw1z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-and-derivative-relationship-demo/sssssw1z"/>
      <lastmod>2026-11-02T17:55:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-and-derivative-relationship-demo/sssssw1z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-and-derivative-relationship-demo/sssssw1z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-and-derivative-relationship-demo/sssssw1z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-and-derivative-relationship-demo/sssssw1z"/>
      <lastmod>2026-11-02T17:55:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-construction-angle-bisectors-and-circumcircle/sssssw10</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-angle-bisectors-and-circumcircle/sssssw10"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-angle-bisectors-and-circumcircle/sssssw10"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-angle-bisectors-and-circumcircle/sssssw10"/>
      <lastmod>2026-11-02T18:04:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-construction-angle-bisectors-and-circumcircle/sssssw10</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-angle-bisectors-and-circumcircle/sssssw10"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-angle-bisectors-and-circumcircle/sssssw10"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-angle-bisectors-and-circumcircle/sssssw10"/>
      <lastmod>2026-11-02T18:04:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotations/sssssw1d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotations/sssssw1d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotations/sssssw1d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotations/sssssw1d"/>
      <lastmod>2026-11-02T06:16:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotations/sssssw1d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotations/sssssw1d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotations/sssssw1d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotations/sssssw1d"/>
      <lastmod>2026-11-02T06:16:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-construction-2/sssssw1f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-construction-2/sssssw1f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-construction-2/sssssw1f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-construction-2/sssssw1f"/>
      <lastmod>2026-11-02T16:32:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-construction-2/sssssw1f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-construction-2/sssssw1f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-construction-2/sssssw1f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-construction-2/sssssw1f"/>
      <lastmod>2026-11-02T16:32:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-parallelograms-by-constructing-diagonals/sssssw18</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-parallelograms-by-constructing-diagonals/sssssw18"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-parallelograms-by-constructing-diagonals/sssssw18"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-parallelograms-by-constructing-diagonals/sssssw18"/>
      <lastmod>2026-11-02T16:35:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-parallelograms-by-constructing-diagonals/sssssw18</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-parallelograms-by-constructing-diagonals/sssssw18"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-parallelograms-by-constructing-diagonals/sssssw18"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-parallelograms-by-constructing-diagonals/sssssw18"/>
      <lastmod>2026-11-02T16:35:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-multiplication-demo-by-jennifer-north-morris/sssssw1u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-multiplication-demo-by-jennifer-north-morris/sssssw1u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-multiplication-demo-by-jennifer-north-morris/sssssw1u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-multiplication-demo-by-jennifer-north-morris/sssssw1u"/>
      <lastmod>2026-11-02T18:04:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-multiplication-demo-by-jennifer-north-morris/sssssw1u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-multiplication-demo-by-jennifer-north-morris/sssssw1u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-multiplication-demo-by-jennifer-north-morris/sssssw1u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-multiplication-demo-by-jennifer-north-morris/sssssw1u"/>
      <lastmod>2026-11-02T18:04:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/effects-of-scaling-on-areas-of-similar-figures/sssssw15</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/effects-of-scaling-on-areas-of-similar-figures/sssssw15"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/effects-of-scaling-on-areas-of-similar-figures/sssssw15"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/effects-of-scaling-on-areas-of-similar-figures/sssssw15"/>
      <lastmod>2026-11-02T03:13:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/effects-of-scaling-on-areas-of-similar-figures/sssssw15</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/effects-of-scaling-on-areas-of-similar-figures/sssssw15"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/effects-of-scaling-on-areas-of-similar-figures/sssssw15"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/effects-of-scaling-on-areas-of-similar-figures/sssssw15"/>
      <lastmod>2026-11-02T03:13:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/using-area-to-find-equivalent-fractions/sssssw1b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-area-to-find-equivalent-fractions/sssssw1b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-area-to-find-equivalent-fractions/sssssw1b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-area-to-find-equivalent-fractions/sssssw1b"/>
      <lastmod>2026-11-02T18:58:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/using-area-to-find-equivalent-fractions/sssssw1b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-area-to-find-equivalent-fractions/sssssw1b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-area-to-find-equivalent-fractions/sssssw1b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-area-to-find-equivalent-fractions/sssssw1b"/>
      <lastmod>2026-11-02T18:58:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/matrix-rotation-demonstration/sssssw13</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-rotation-demonstration/sssssw13"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-rotation-demonstration/sssssw13"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-rotation-demonstration/sssssw13"/>
      <lastmod>2026-11-01T23:44:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/matrix-rotation-demonstration/sssssw13</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-rotation-demonstration/sssssw13"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-rotation-demonstration/sssssw13"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-rotation-demonstration/sssssw13"/>
      <lastmod>2026-11-01T23:44:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-7-4-10-practice-tax-and-tip/sssssw1q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-4-10-practice-tax-and-tip/sssssw1q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-4-10-practice-tax-and-tip/sssssw1q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-4-10-practice-tax-and-tip/sssssw1q"/>
      <lastmod>2026-11-01T22:56:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-7-4-10-practice-tax-and-tip/sssssw1q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-4-10-practice-tax-and-tip/sssssw1q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-4-10-practice-tax-and-tip/sssssw1q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-4-10-practice-tax-and-tip/sssssw1q"/>
      <lastmod>2026-11-01T22:56:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygon-angle-sums-dynamic-quadrilateral-through-octagon/sssssw11</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-angle-sums-dynamic-quadrilateral-through-octagon/sssssw11"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-angle-sums-dynamic-quadrilateral-through-octagon/sssssw11"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-angle-sums-dynamic-quadrilateral-through-octagon/sssssw11"/>
      <lastmod>2026-11-02T18:46:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygon-angle-sums-dynamic-quadrilateral-through-octagon/sssssw11</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-angle-sums-dynamic-quadrilateral-through-octagon/sssssw11"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-angle-sums-dynamic-quadrilateral-through-octagon/sssssw11"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-angle-sums-dynamic-quadrilateral-through-octagon/sssssw11"/>
      <lastmod>2026-11-02T18:46:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoid-properties/sssssw1m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-properties/sssssw1m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-properties/sssssw1m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-properties/sssssw1m"/>
      <lastmod>2026-11-02T16:31:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoid-properties/sssssw1m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-properties/sssssw1m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-properties/sssssw1m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-properties/sssssw1m"/>
      <lastmod>2026-11-02T16:31:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-a-cuboid-fold-unfold-animation/sssssw1j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cuboid-fold-unfold-animation/sssssw1j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-cuboid-fold-unfold-animation/sssssw1j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cuboid-fold-unfold-animation/sssssw1j"/>
      <lastmod>2026-11-02T00:12:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-a-cuboid-fold-unfold-animation/sssssw1j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cuboid-fold-unfold-animation/sssssw1j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-a-cuboid-fold-unfold-animation/sssssw1j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-a-cuboid-fold-unfold-animation/sssssw1j"/>
      <lastmod>2026-11-02T00:12:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similarity-transformation-demo/sssssw1p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similarity-transformation-demo/sssssw1p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similarity-transformation-demo/sssssw1p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similarity-transformation-demo/sssssw1p"/>
      <lastmod>2026-11-01T23:14:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similarity-transformation-demo/sssssw1p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similarity-transformation-demo/sssssw1p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similarity-transformation-demo/sssssw1p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similarity-transformation-demo/sssssw1p"/>
      <lastmod>2026-11-01T23:14:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animating-a-geometric-construction/sssssw1w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animating-a-geometric-construction/sssssw1w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animating-a-geometric-construction/sssssw1w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animating-a-geometric-construction/sssssw1w"/>
      <lastmod>2026-11-02T17:36:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animating-a-geometric-construction/sssssw1w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animating-a-geometric-construction/sssssw1w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animating-a-geometric-construction/sssssw1w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animating-a-geometric-construction/sssssw1w"/>
      <lastmod>2026-11-02T17:36:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/eigenmann-no-130-trapezoid-and-geometric-construction/sssssw16</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eigenmann-no-130-trapezoid-and-geometric-construction/sssssw16"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eigenmann-no-130-trapezoid-and-geometric-construction/sssssw16"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eigenmann-no-130-trapezoid-and-geometric-construction/sssssw16"/>
      <lastmod>2026-11-02T00:43:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/eigenmann-no-130-trapezoid-and-geometric-construction/sssssw16</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eigenmann-no-130-trapezoid-and-geometric-construction/sssssw16"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eigenmann-no-130-trapezoid-and-geometric-construction/sssssw16"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eigenmann-no-130-trapezoid-and-geometric-construction/sssssw16"/>
      <lastmod>2026-11-02T00:43:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coordinate-geometry-and-equations-of-lines-problems/sssssw1g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinate-geometry-and-equations-of-lines-problems/sssssw1g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinate-geometry-and-equations-of-lines-problems/sssssw1g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinate-geometry-and-equations-of-lines-problems/sssssw1g"/>
      <lastmod>2026-11-01T19:29:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coordinate-geometry-and-equations-of-lines-problems/sssssw1g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coordinate-geometry-and-equations-of-lines-problems/sssssw1g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coordinate-geometry-and-equations-of-lines-problems/sssssw1g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coordinate-geometry-and-equations-of-lines-problems/sssssw1g"/>
      <lastmod>2026-11-01T19:29:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-derivatives/sssssw19</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-derivatives/sssssw19"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-derivatives/sssssw19"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-derivatives/sssssw19"/>
      <lastmod>2026-11-02T09:27:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-derivatives/sssssw19</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-derivatives/sssssw19"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-derivatives/sssssw19"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-derivatives/sssssw19"/>
      <lastmod>2026-11-02T09:27:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-5/sssssw1e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-5/sssssw1e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-illustration-by-tim-brzezinski-5/sssssw1e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-5/sssssw1e"/>
      <lastmod>2026-11-02T17:08:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-geometry-illustration-by-tim-brzezinski-5/sssssw1e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-5/sssssw1e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-illustration-by-tim-brzezinski-5/sssssw1e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-5/sssssw1e"/>
      <lastmod>2026-11-02T17:08:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-construction/sssssw1v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-construction/sssssw1v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-construction/sssssw1v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-construction/sssssw1v"/>
      <lastmod>2026-11-02T00:50:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-construction/sssssw1v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-construction/sssssw1v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-construction/sssssw1v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-construction/sssssw1v"/>
      <lastmod>2026-11-02T00:50:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-demonstration/sssssw14</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-demonstration/sssssw14"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-demonstration/sssssw14"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-demonstration/sssssw14"/>
      <lastmod>2026-11-01T23:14:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-demonstration/sssssw14</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-demonstration/sssssw14"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-demonstration/sssssw14"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-demonstration/sssssw14"/>
      <lastmod>2026-11-01T23:14:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-linear-systems-by-graphing-by-mrs-simon/sssssw1l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-systems-by-graphing-by-mrs-simon/sssssw1l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-systems-by-graphing-by-mrs-simon/sssssw1l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-systems-by-graphing-by-mrs-simon/sssssw1l"/>
      <lastmod>2026-11-02T02:34:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-linear-systems-by-graphing-by-mrs-simon/sssssw1l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-systems-by-graphing-by-mrs-simon/sssssw1l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-systems-by-graphing-by-mrs-simon/sssssw1l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-systems-by-graphing-by-mrs-simon/sssssw1l"/>
      <lastmod>2026-11-02T02:34:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lorenz-84-attractor/sssssw1y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lorenz-84-attractor/sssssw1y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lorenz-84-attractor/sssssw1y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lorenz-84-attractor/sssssw1y"/>
      <lastmod>2026-11-02T13:07:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lorenz-84-attractor/sssssw1y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lorenz-84-attractor/sssssw1y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lorenz-84-attractor/sssssw1y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lorenz-84-attractor/sssssw1y"/>
      <lastmod>2026-11-02T13:07:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-demo-of-linear-functions-and-probability-distributions/sssssw1a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demo-of-linear-functions-and-probability-distributions/sssssw1a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demo-of-linear-functions-and-probability-distributions/sssssw1a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demo-of-linear-functions-and-probability-distributions/sssssw1a"/>
      <lastmod>2026-11-02T16:39:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-demo-of-linear-functions-and-probability-distributions/sssssw1a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demo-of-linear-functions-and-probability-distributions/sssssw1a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demo-of-linear-functions-and-probability-distributions/sssssw1a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demo-of-linear-functions-and-probability-distributions/sssssw1a"/>
      <lastmod>2026-11-02T16:39:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/range-of-sine-function/sssssw1c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/range-of-sine-function/sssssw1c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/range-of-sine-function/sssssw1c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/range-of-sine-function/sssssw1c"/>
      <lastmod>2026-11-01T23:22:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/range-of-sine-function/sssssw1c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/range-of-sine-function/sssssw1c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/range-of-sine-function/sssssw1c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/range-of-sine-function/sssssw1c"/>
      <lastmod>2026-11-01T23:22:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-triangles-with-congruent-hypotenuses-and-legs/sssssw1r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangles-with-congruent-hypotenuses-and-legs/sssssw1r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangles-with-congruent-hypotenuses-and-legs/sssssw1r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangles-with-congruent-hypotenuses-and-legs/sssssw1r"/>
      <lastmod>2026-11-02T09:54:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-triangles-with-congruent-hypotenuses-and-legs/sssssw1r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangles-with-congruent-hypotenuses-and-legs/sssssw1r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangles-with-congruent-hypotenuses-and-legs/sssssw1r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangles-with-congruent-hypotenuses-and-legs/sssssw1r"/>
      <lastmod>2026-11-02T09:54:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/archimedes-and-parallelogram-s-center-of-gravity/sssssw1h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/archimedes-and-parallelogram-s-center-of-gravity/sssssw1h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/archimedes-and-parallelogram-s-center-of-gravity/sssssw1h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/archimedes-and-parallelogram-s-center-of-gravity/sssssw1h"/>
      <lastmod>2026-11-02T18:51:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/archimedes-and-parallelogram-s-center-of-gravity/sssssw1h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/archimedes-and-parallelogram-s-center-of-gravity/sssssw1h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/archimedes-and-parallelogram-s-center-of-gravity/sssssw1h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/archimedes-and-parallelogram-s-center-of-gravity/sssssw1h"/>
      <lastmod>2026-11-02T18:51:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformations-of-exponential-functions-dynamic-visualization-and-intersection/sssssw1t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-of-exponential-functions-dynamic-visualization-and-intersection/sssssw1t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-of-exponential-functions-dynamic-visualization-and-intersection/sssssw1t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-of-exponential-functions-dynamic-visualization-and-intersection/sssssw1t"/>
      <lastmod>2026-11-02T17:37:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformations-of-exponential-functions-dynamic-visualization-and-intersection/sssssw1t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-of-exponential-functions-dynamic-visualization-and-intersection/sssssw1t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-of-exponential-functions-dynamic-visualization-and-intersection/sssssw1t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-of-exponential-functions-dynamic-visualization-and-intersection/sssssw1t"/>
      <lastmod>2026-11-02T17:37:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/islamic-geometric-pattern-construction/sssssw1x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-geometric-pattern-construction/sssssw1x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-geometric-pattern-construction/sssssw1x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-geometric-pattern-construction/sssssw1x"/>
      <lastmod>2026-11-01T19:30:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/islamic-geometric-pattern-construction/sssssw1x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-geometric-pattern-construction/sssssw1x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-geometric-pattern-construction/sssssw1x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-geometric-pattern-construction/sssssw1x"/>
      <lastmod>2026-11-01T19:30:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-root-of-x-is-uniformly-continuous/sssssw1i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-of-x-is-uniformly-continuous/sssssw1i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-of-x-is-uniformly-continuous/sssssw1i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-of-x-is-uniformly-continuous/sssssw1i"/>
      <lastmod>2026-11-01T23:51:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-root-of-x-is-uniformly-continuous/sssssw1i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-of-x-is-uniformly-continuous/sssssw1i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-of-x-is-uniformly-continuous/sssssw1i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-of-x-is-uniformly-continuous/sssssw1i"/>
      <lastmod>2026-11-01T23:51:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/range-of-a-sinusoidal-accuracy-quiz/sssssw1o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/range-of-a-sinusoidal-accuracy-quiz/sssssw1o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/range-of-a-sinusoidal-accuracy-quiz/sssssw1o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/range-of-a-sinusoidal-accuracy-quiz/sssssw1o"/>
      <lastmod>2026-11-01T21:53:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/range-of-a-sinusoidal-accuracy-quiz/sssssw1o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/range-of-a-sinusoidal-accuracy-quiz/sssssw1o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/range-of-a-sinusoidal-accuracy-quiz/sssssw1o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/range-of-a-sinusoidal-accuracy-quiz/sssssw1o"/>
      <lastmod>2026-11-01T21:53:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-as-limit-of-slopes-of-secant-lines/ssssswms</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-as-limit-of-slopes-of-secant-lines/ssssswms"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-as-limit-of-slopes-of-secant-lines/ssssswms"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-as-limit-of-slopes-of-secant-lines/ssssswms"/>
      <lastmod>2026-11-02T02:33:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-as-limit-of-slopes-of-secant-lines/ssssswms</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-as-limit-of-slopes-of-secant-lines/ssssswms"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-as-limit-of-slopes-of-secant-lines/ssssswms"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-as-limit-of-slopes-of-secant-lines/ssssswms"/>
      <lastmod>2026-11-02T02:33:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angles-on-parallel-lines/ssssswm7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-on-parallel-lines/ssssswm7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-on-parallel-lines/ssssswm7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-on-parallel-lines/ssssswm7"/>
      <lastmod>2026-11-02T16:49:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angles-on-parallel-lines/ssssswm7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-on-parallel-lines/ssssswm7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-on-parallel-lines/ssssswm7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-on-parallel-lines/ssssswm7"/>
      <lastmod>2026-11-02T16:49:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/box-plot-construction-example/ssssswmn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/box-plot-construction-example/ssssswmn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/box-plot-construction-example/ssssswmn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/box-plot-construction-example/ssssswmn"/>
      <lastmod>2026-11-02T10:35:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/box-plot-construction-example/ssssswmn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/box-plot-construction-example/ssssswmn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/box-plot-construction-example/ssssswmn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/box-plot-construction-example/ssssswmn"/>
      <lastmod>2026-11-02T10:35:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cavalieri-s-principle-for-pyramid-volume/ssssswm2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cavalieri-s-principle-for-pyramid-volume/ssssswm2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cavalieri-s-principle-for-pyramid-volume/ssssswm2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cavalieri-s-principle-for-pyramid-volume/ssssswm2"/>
      <lastmod>2026-11-01T23:09:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cavalieri-s-principle-for-pyramid-volume/ssssswm2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cavalieri-s-principle-for-pyramid-volume/ssssswm2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cavalieri-s-principle-for-pyramid-volume/ssssswm2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cavalieri-s-principle-for-pyramid-volume/ssssswm2"/>
      <lastmod>2026-11-01T23:09:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-inequalities-by-pamela-obarowski/ssssswmk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-by-pamela-obarowski/ssssswmk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-inequalities-by-pamela-obarowski/ssssswmk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-by-pamela-obarowski/ssssswmk"/>
      <lastmod>2026-11-01T20:53:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-inequalities-by-pamela-obarowski/ssssswmk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-by-pamela-obarowski/ssssswmk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-inequalities-by-pamela-obarowski/ssssswmk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-inequalities-by-pamela-obarowski/ssssswmk"/>
      <lastmod>2026-11-01T20:53:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sequencing-reflections-and-translations-bellringer/ssssswmz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sequencing-reflections-and-translations-bellringer/ssssswmz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sequencing-reflections-and-translations-bellringer/ssssswmz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sequencing-reflections-and-translations-bellringer/ssssswmz"/>
      <lastmod>2026-11-02T18:48:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sequencing-reflections-and-translations-bellringer/ssssswmz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sequencing-reflections-and-translations-bellringer/ssssswmz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sequencing-reflections-and-translations-bellringer/ssssswmz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sequencing-reflections-and-translations-bellringer/ssssswmz"/>
      <lastmod>2026-11-02T18:48:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-points-and-limits-in-a-parallelogram-q7/ssssswm0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-points-and-limits-in-a-parallelogram-q7/ssssswm0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-points-and-limits-in-a-parallelogram-q7/ssssswm0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-points-and-limits-in-a-parallelogram-q7/ssssswm0"/>
      <lastmod>2026-11-01T21:28:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-points-and-limits-in-a-parallelogram-q7/ssssswm0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-points-and-limits-in-a-parallelogram-q7/ssssswm0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-points-and-limits-in-a-parallelogram-q7/ssssswm0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-points-and-limits-in-a-parallelogram-q7/ssssswm0"/>
      <lastmod>2026-11-01T21:28:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-isosceles-triangles/ssssswmd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-isosceles-triangles/ssssswmd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-isosceles-triangles/ssssswmd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-isosceles-triangles/ssssswmd"/>
      <lastmod>2026-11-02T17:58:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-isosceles-triangles/ssssswmd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-isosceles-triangles/ssssswmd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-isosceles-triangles/ssssswmd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-isosceles-triangles/ssssswmd"/>
      <lastmod>2026-11-02T17:58:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-and-cube/ssssswmf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-and-cube/ssssswmf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-and-cube/ssssswmf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-and-cube/ssssswmf"/>
      <lastmod>2026-11-01T21:59:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-and-cube/ssssswmf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-and-cube/ssssswmf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-and-cube/ssssswmf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-and-cube/ssssswmf"/>
      <lastmod>2026-11-01T21:59:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/types-of-triangles/ssssswm8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/types-of-triangles/ssssswm8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/types-of-triangles/ssssswm8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/types-of-triangles/ssssswm8"/>
      <lastmod>2026-11-01T23:34:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/types-of-triangles/ssssswm8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/types-of-triangles/ssssswm8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/types-of-triangles/ssssswm8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/types-of-triangles/ssssswm8"/>
      <lastmod>2026-11-01T23:34:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-7/ssssswmu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-7/ssssswmu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-7/ssssswmu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-7/ssssswmu"/>
      <lastmod>2026-11-01T21:26:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-7/ssssswmu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-7/ssssswmu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-7/ssssswmu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-7/ssssswmu"/>
      <lastmod>2026-11-01T21:26:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/distance-from-a-point-to-a-plane-in-cube-abcdefgh/ssssswm5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-from-a-point-to-a-plane-in-cube-abcdefgh/ssssswm5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-from-a-point-to-a-plane-in-cube-abcdefgh/ssssswm5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-from-a-point-to-a-plane-in-cube-abcdefgh/ssssswm5"/>
      <lastmod>2026-11-01T21:34:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/distance-from-a-point-to-a-plane-in-cube-abcdefgh/ssssswm5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-from-a-point-to-a-plane-in-cube-abcdefgh/ssssswm5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-from-a-point-to-a-plane-in-cube-abcdefgh/ssssswm5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-from-a-point-to-a-plane-in-cube-abcdefgh/ssssswm5"/>
      <lastmod>2026-11-01T21:34:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/nested-polygons/ssssswmb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nested-polygons/ssssswmb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nested-polygons/ssssswmb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nested-polygons/ssssswmb"/>
      <lastmod>2026-11-01T20:49:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/nested-polygons/ssssswmb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nested-polygons/ssssswmb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nested-polygons/ssssswmb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nested-polygons/ssssswmb"/>
      <lastmod>2026-11-01T20:49:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/euler-s-method-tool/ssssswm3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euler-s-method-tool/ssssswm3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euler-s-method-tool/ssssswm3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euler-s-method-tool/ssssswm3"/>
      <lastmod>2026-11-01T21:00:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/euler-s-method-tool/ssssswm3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euler-s-method-tool/ssssswm3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euler-s-method-tool/ssssswm3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euler-s-method-tool/ssssswm3"/>
      <lastmod>2026-11-01T21:00:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-of-the-area-of-an-equilateral-triangle/ssssswmq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-the-area-of-an-equilateral-triangle/ssssswmq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-the-area-of-an-equilateral-triangle/ssssswmq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-the-area-of-an-equilateral-triangle/ssssswmq"/>
      <lastmod>2026-11-02T00:21:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-of-the-area-of-an-equilateral-triangle/ssssswmq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-of-the-area-of-an-equilateral-triangle/ssssswmq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-of-the-area-of-an-equilateral-triangle/ssssswmq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-of-the-area-of-an-equilateral-triangle/ssssswmq"/>
      <lastmod>2026-11-02T00:21:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/roots-of-a-parabola-interactive-exploration/ssssswm1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roots-of-a-parabola-interactive-exploration/ssssswm1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roots-of-a-parabola-interactive-exploration/ssssswm1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roots-of-a-parabola-interactive-exploration/ssssswm1"/>
      <lastmod>2026-11-01T20:48:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/roots-of-a-parabola-interactive-exploration/ssssswm1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roots-of-a-parabola-interactive-exploration/ssssswm1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roots-of-a-parabola-interactive-exploration/ssssswm1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roots-of-a-parabola-interactive-exploration/ssssswm1"/>
      <lastmod>2026-11-01T20:48:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/oneline-lawson-klein-bottle/ssssswmm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oneline-lawson-klein-bottle/ssssswmm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oneline-lawson-klein-bottle/ssssswmm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oneline-lawson-klein-bottle/ssssswmm"/>
      <lastmod>2026-11-02T17:57:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/oneline-lawson-klein-bottle/ssssswmm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/oneline-lawson-klein-bottle/ssssswmm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/oneline-lawson-klein-bottle/ssssswmm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/oneline-lawson-klein-bottle/ssssswmm"/>
      <lastmod>2026-11-02T17:57:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tick-boxes-union-and-intersection/ssssswmj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tick-boxes-union-and-intersection/ssssswmj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tick-boxes-union-and-intersection/ssssswmj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tick-boxes-union-and-intersection/ssssswmj"/>
      <lastmod>2026-11-02T00:41:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tick-boxes-union-and-intersection/ssssswmj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tick-boxes-union-and-intersection/ssssswmj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tick-boxes-union-and-intersection/ssssswmj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tick-boxes-union-and-intersection/ssssswmj"/>
      <lastmod>2026-11-02T00:41:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-michael-gillespie/ssssswmp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-michael-gillespie/ssssswmp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-michael-gillespie/ssssswmp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-michael-gillespie/ssssswmp"/>
      <lastmod>2026-11-02T18:16:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-michael-gillespie/ssssswmp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-michael-gillespie/ssssswmp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-michael-gillespie/ssssswmp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-michael-gillespie/ssssswmp"/>
      <lastmod>2026-11-02T18:16:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cobweb-plot-construction/ssssswmw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cobweb-plot-construction/ssssswmw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cobweb-plot-construction/ssssswmw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cobweb-plot-construction/ssssswmw"/>
      <lastmod>2026-11-02T02:38:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cobweb-plot-construction/ssssswmw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cobweb-plot-construction/ssssswmw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cobweb-plot-construction/ssssswmw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cobweb-plot-construction/ssssswmw"/>
      <lastmod>2026-11-02T02:38:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-a-pyramid/ssssswm6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-pyramid/ssssswm6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-pyramid/ssssswm6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-pyramid/ssssswm6"/>
      <lastmod>2026-11-01T21:37:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-a-pyramid/ssssswm6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-a-pyramid/ssssswm6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-a-pyramid/ssssswm6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-a-pyramid/ssssswm6"/>
      <lastmod>2026-11-01T21:37:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-volume-cube/ssssswmg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-volume-cube/ssssswmg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-volume-cube/ssssswmg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-volume-cube/ssssswmg"/>
      <lastmod>2026-11-01T21:59:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-volume-cube/ssssswmg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-volume-cube/ssssswmg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-volume-cube/ssssswmg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-volume-cube/ssssswmg"/>
      <lastmod>2026-11-01T21:59:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-dissection-into-three-square-pyramids/ssssswm9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-dissection-into-three-square-pyramids/ssssswm9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-dissection-into-three-square-pyramids/ssssswm9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-dissection-into-three-square-pyramids/ssssswm9"/>
      <lastmod>2026-11-02T18:15:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-dissection-into-three-square-pyramids/ssssswm9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-dissection-into-three-square-pyramids/ssssswm9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-dissection-into-three-square-pyramids/ssssswm9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-dissection-into-three-square-pyramids/ssssswm9"/>
      <lastmod>2026-11-02T18:15:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/painting-a-room-area-calculation/ssssswme</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/painting-a-room-area-calculation/ssssswme"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/painting-a-room-area-calculation/ssssswme"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/painting-a-room-area-calculation/ssssswme"/>
      <lastmod>2026-11-02T10:37:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/painting-a-room-area-calculation/ssssswme</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/painting-a-room-area-calculation/ssssswme"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/painting-a-room-area-calculation/ssssswme"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/painting-a-room-area-calculation/ssssswme"/>
      <lastmod>2026-11-02T10:37:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-to-standard-normal-distribution-by-robynong/ssssswmv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-to-standard-normal-distribution-by-robynong/ssssswmv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-to-standard-normal-distribution-by-robynong/ssssswmv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-to-standard-normal-distribution-by-robynong/ssssswmv"/>
      <lastmod>2026-11-01T23:28:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-to-standard-normal-distribution-by-robynong/ssssswmv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-to-standard-normal-distribution-by-robynong/ssssswmv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-to-standard-normal-distribution-by-robynong/ssssswmv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-to-standard-normal-distribution-by-robynong/ssssswmv"/>
      <lastmod>2026-11-01T23:28:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lateral-surface-area-of-a-cone/ssssswm4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lateral-surface-area-of-a-cone/ssssswm4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lateral-surface-area-of-a-cone/ssssswm4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lateral-surface-area-of-a-cone/ssssswm4"/>
      <lastmod>2026-11-01T23:56:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lateral-surface-area-of-a-cone/ssssswm4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lateral-surface-area-of-a-cone/ssssswm4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lateral-surface-area-of-a-cone/ssssswm4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lateral-surface-area-of-a-cone/ssssswm4"/>
      <lastmod>2026-11-01T23:56:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-of-revolution-y-axis-3d-glasses-effect/ssssswml</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-y-axis-3d-glasses-effect/ssssswml"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-y-axis-3d-glasses-effect/ssssswml"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-y-axis-3d-glasses-effect/ssssswml"/>
      <lastmod>2026-11-01T20:57:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-of-revolution-y-axis-3d-glasses-effect/ssssswml</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-y-axis-3d-glasses-effect/ssssswml"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-y-axis-3d-glasses-effect/ssssswml"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-y-axis-3d-glasses-effect/ssssswml"/>
      <lastmod>2026-11-01T20:57:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bar-graph-vs-histogram/ssssswmy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bar-graph-vs-histogram/ssssswmy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bar-graph-vs-histogram/ssssswmy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bar-graph-vs-histogram/ssssswmy"/>
      <lastmod>2026-11-02T16:39:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bar-graph-vs-histogram/ssssswmy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bar-graph-vs-histogram/ssssswmy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bar-graph-vs-histogram/ssssswmy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bar-graph-vs-histogram/ssssswmy"/>
      <lastmod>2026-11-02T16:39:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cubic-function-transformations/ssssswma</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubic-function-transformations/ssssswma"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubic-function-transformations/ssssswma"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubic-function-transformations/ssssswma"/>
      <lastmod>2026-11-02T15:14:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cubic-function-transformations/ssssswma</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cubic-function-transformations/ssssswma"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cubic-function-transformations/ssssswma"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cubic-function-transformations/ssssswma"/>
      <lastmod>2026-11-02T15:14:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-surface-area-demonstration-by-katie-davidson/ssssswmc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-surface-area-demonstration-by-katie-davidson/ssssswmc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-surface-area-demonstration-by-katie-davidson/ssssswmc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-surface-area-demonstration-by-katie-davidson/ssssswmc"/>
      <lastmod>2026-11-02T18:17:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-surface-area-demonstration-by-katie-davidson/ssssswmc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-surface-area-demonstration-by-katie-davidson/ssssswmc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-surface-area-demonstration-by-katie-davidson/ssssswmc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-surface-area-demonstration-by-katie-davidson/ssssswmc"/>
      <lastmod>2026-11-02T18:17:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-animation-demo/ssssswmr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-animation-demo/ssssswmr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-animation-demo/ssssswmr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-animation-demo/ssssswmr"/>
      <lastmod>2026-11-02T18:33:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-animation-demo/ssssswmr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-animation-demo/ssssswmr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-animation-demo/ssssswmr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-animation-demo/ssssswmr"/>
      <lastmod>2026-11-02T18:33:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-construction-by-luis-carrion-gonzalez/ssssswmh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-construction-by-luis-carrion-gonzalez/ssssswmh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-construction-by-luis-carrion-gonzalez/ssssswmh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-construction-by-luis-carrion-gonzalez/ssssswmh"/>
      <lastmod>2026-11-02T17:07:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-construction-by-luis-carrion-gonzalez/ssssswmh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-construction-by-luis-carrion-gonzalez/ssssswmh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-construction-by-luis-carrion-gonzalez/ssssswmh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-construction-by-luis-carrion-gonzalez/ssssswmh"/>
      <lastmod>2026-11-02T17:07:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/nephroid-as-an-envelope-dynamic-geometry-demonstration/ssssswmt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nephroid-as-an-envelope-dynamic-geometry-demonstration/ssssswmt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nephroid-as-an-envelope-dynamic-geometry-demonstration/ssssswmt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nephroid-as-an-envelope-dynamic-geometry-demonstration/ssssswmt"/>
      <lastmod>2026-11-01T21:09:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/nephroid-as-an-envelope-dynamic-geometry-demonstration/ssssswmt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nephroid-as-an-envelope-dynamic-geometry-demonstration/ssssswmt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nephroid-as-an-envelope-dynamic-geometry-demonstration/ssssswmt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nephroid-as-an-envelope-dynamic-geometry-demonstration/ssssswmt"/>
      <lastmod>2026-11-01T21:09:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-orthocenter-demonstration/ssssswmx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-orthocenter-demonstration/ssssswmx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-orthocenter-demonstration/ssssswmx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-orthocenter-demonstration/ssssswmx"/>
      <lastmod>2026-11-01T21:16:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-orthocenter-demonstration/ssssswmx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-orthocenter-demonstration/ssssswmx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-orthocenter-demonstration/ssssswmx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-orthocenter-demonstration/ssssswmx"/>
      <lastmod>2026-11-01T21:16:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cosine-function-transformations/ssssswmi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-function-transformations/ssssswmi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-function-transformations/ssssswmi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-function-transformations/ssssswmi"/>
      <lastmod>2026-11-01T19:01:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cosine-function-transformations/ssssswmi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-function-transformations/ssssswmi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-function-transformations/ssssswmi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-function-transformations/ssssswmi"/>
      <lastmod>2026-11-01T19:01:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/scaled-similar-triangles/ssssswmo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scaled-similar-triangles/ssssswmo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scaled-similar-triangles/ssssswmo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scaled-similar-triangles/ssssswmo"/>
      <lastmod>2026-11-01T23:15:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/scaled-similar-triangles/ssssswmo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/scaled-similar-triangles/ssssswmo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/scaled-similar-triangles/ssssswmo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/scaled-similar-triangles/ssssswmo"/>
      <lastmod>2026-11-01T23:15:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/acceptance-rejection-sampling-of-normal-distribution/ssssswjs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/acceptance-rejection-sampling-of-normal-distribution/ssssswjs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/acceptance-rejection-sampling-of-normal-distribution/ssssswjs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/acceptance-rejection-sampling-of-normal-distribution/ssssswjs"/>
      <lastmod>2026-11-01T20:45:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/acceptance-rejection-sampling-of-normal-distribution/ssssswjs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/acceptance-rejection-sampling-of-normal-distribution/ssssswjs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/acceptance-rejection-sampling-of-normal-distribution/ssssswjs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/acceptance-rejection-sampling-of-normal-distribution/ssssswjs"/>
      <lastmod>2026-11-01T20:45:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/osculating-vectors-on-a-parametric-curve/ssssswj7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/osculating-vectors-on-a-parametric-curve/ssssswj7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/osculating-vectors-on-a-parametric-curve/ssssswj7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/osculating-vectors-on-a-parametric-curve/ssssswj7"/>
      <lastmod>2026-11-02T17:45:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/osculating-vectors-on-a-parametric-curve/ssssswj7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/osculating-vectors-on-a-parametric-curve/ssssswj7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/osculating-vectors-on-a-parametric-curve/ssssswj7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/osculating-vectors-on-a-parametric-curve/ssssswj7"/>
      <lastmod>2026-11-02T17:45:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponents-power-to-power-interactive-demo/ssssswjn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponents-power-to-power-interactive-demo/ssssswjn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponents-power-to-power-interactive-demo/ssssswjn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponents-power-to-power-interactive-demo/ssssswjn"/>
      <lastmod>2026-11-02T11:01:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponents-power-to-power-interactive-demo/ssssswjn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponents-power-to-power-interactive-demo/ssssswjn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponents-power-to-power-interactive-demo/ssssswjn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponents-power-to-power-interactive-demo/ssssswjn"/>
      <lastmod>2026-11-02T11:01:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-area-by-decomposing-and-rearranging-by-geogebra-classroom-activities/ssssswj2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-area-by-decomposing-and-rearranging-by-geogebra-classroom-activities/ssssswj2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-area-by-decomposing-and-rearranging-by-geogebra-classroom-activities/ssssswj2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-area-by-decomposing-and-rearranging-by-geogebra-classroom-activities/ssssswj2"/>
      <lastmod>2026-11-02T10:38:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-area-by-decomposing-and-rearranging-by-geogebra-classroom-activities/ssssswj2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-area-by-decomposing-and-rearranging-by-geogebra-classroom-activities/ssssswj2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-area-by-decomposing-and-rearranging-by-geogebra-classroom-activities/ssssswj2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-area-by-decomposing-and-rearranging-by-geogebra-classroom-activities/ssssswj2"/>
      <lastmod>2026-11-02T10:38:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-cone-by-kent-tsang/ssssswjk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-cone-by-kent-tsang/ssssswjk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-cone-by-kent-tsang/ssssswjk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-cone-by-kent-tsang/ssssswjk"/>
      <lastmod>2026-11-02T13:41:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-cone-by-kent-tsang/ssssswjk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-cone-by-kent-tsang/ssssswjk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-cone-by-kent-tsang/ssssswjk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-cone-by-kent-tsang/ssssswjk"/>
      <lastmod>2026-11-02T13:41:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-7-7-15-practice-distinguishing-volume-and-surface-area/ssssswjz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-7-15-practice-distinguishing-volume-and-surface-area/ssssswjz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-7-15-practice-distinguishing-volume-and-surface-area/ssssswjz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-7-15-practice-distinguishing-volume-and-surface-area/ssssswjz"/>
      <lastmod>2026-11-02T02:00:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-7-7-15-practice-distinguishing-volume-and-surface-area/ssssswjz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-7-15-practice-distinguishing-volume-and-surface-area/ssssswjz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-7-15-practice-distinguishing-volume-and-surface-area/ssssswjz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-7-15-practice-distinguishing-volume-and-surface-area/ssssswjz"/>
      <lastmod>2026-11-02T02:00:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-kites-by-nmoore2020/ssssswj0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-kites-by-nmoore2020/ssssswj0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-kites-by-nmoore2020/ssssswj0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-kites-by-nmoore2020/ssssswj0"/>
      <lastmod>2026-11-02T18:06:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-kites-by-nmoore2020/ssssswj0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-kites-by-nmoore2020/ssssswj0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-kites-by-nmoore2020/ssssswj0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-kites-by-nmoore2020/ssssswj0"/>
      <lastmod>2026-11-02T18:06:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoid-investigation-by-julie-arakelian/ssssswjd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-investigation-by-julie-arakelian/ssssswjd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-investigation-by-julie-arakelian/ssssswjd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-investigation-by-julie-arakelian/ssssswjd"/>
      <lastmod>2026-11-02T17:45:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoid-investigation-by-julie-arakelian/ssssswjd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-investigation-by-julie-arakelian/ssssswjd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-investigation-by-julie-arakelian/ssssswjd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-investigation-by-julie-arakelian/ssssswjd"/>
      <lastmod>2026-11-02T17:45:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-over-x-axis/ssssswjf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-over-x-axis/ssssswjf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-over-x-axis/ssssswjf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-over-x-axis/ssssswjf"/>
      <lastmod>2026-11-02T18:16:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-over-x-axis/ssssswjf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-over-x-axis/ssssswjf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-over-x-axis/ssssswjf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-over-x-axis/ssssswjf"/>
      <lastmod>2026-11-02T18:16:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-sphere-cylinder-sssssu95/ssssswj8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-sphere-cylinder-sssssu95/ssssswj8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-sphere-cylinder-sssssu95/ssssswj8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-sphere-cylinder-sssssu95/ssssswj8"/>
      <lastmod>2026-11-02T13:43:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-sphere-cylinder-sssssu95/ssssswj8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-sphere-cylinder-sssssu95/ssssswj8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-sphere-cylinder-sssssu95/ssssswj8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-sphere-cylinder-sssssu95/ssssswj8"/>
      <lastmod>2026-11-02T13:43:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-tetrahedron-slice-3-demo/ssssswju</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-tetrahedron-slice-3-demo/ssssswju"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-tetrahedron-slice-3-demo/ssssswju"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-tetrahedron-slice-3-demo/ssssswju"/>
      <lastmod>2026-11-02T16:54:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-tetrahedron-slice-3-demo/ssssswju</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-tetrahedron-slice-3-demo/ssssswju"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-tetrahedron-slice-3-demo/ssssswju"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-tetrahedron-slice-3-demo/ssssswju"/>
      <lastmod>2026-11-02T16:54:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hexagon-angle-theorems-exploration/ssssswj5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagon-angle-theorems-exploration/ssssswj5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagon-angle-theorems-exploration/ssssswj5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagon-angle-theorems-exploration/ssssswj5"/>
      <lastmod>2026-11-02T14:57:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hexagon-angle-theorems-exploration/ssssswj5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagon-angle-theorems-exploration/ssssswj5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagon-angle-theorems-exploration/ssssswj5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagon-angle-theorems-exploration/ssssswj5"/>
      <lastmod>2026-11-02T14:57:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/basketball-parabola/ssssswjb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basketball-parabola/ssssswjb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basketball-parabola/ssssswjb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basketball-parabola/ssssswjb"/>
      <lastmod>2026-11-02T17:15:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/basketball-parabola/ssssswjb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basketball-parabola/ssssswjb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basketball-parabola/ssssswjb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basketball-parabola/ssssswjb"/>
      <lastmod>2026-11-02T17:15:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parametric-surface-representation/ssssswj3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-surface-representation/ssssswj3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-surface-representation/ssssswj3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-surface-representation/ssssswj3"/>
      <lastmod>2026-11-01T23:17:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parametric-surface-representation/ssssswj3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-surface-representation/ssssswj3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-surface-representation/ssssswj3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-surface-representation/ssssswj3"/>
      <lastmod>2026-11-01T23:17:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-auston-b-cron/ssssswjq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-auston-b-cron/ssssswjq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-auston-b-cron/ssssswjq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-auston-b-cron/ssssswjq"/>
      <lastmod>2026-11-01T19:19:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-auston-b-cron/ssssswjq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-auston-b-cron/ssssswjq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-demo-by-auston-b-cron/ssssswjq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-demo-by-auston-b-cron/ssssswjq"/>
      <lastmod>2026-11-01T19:19:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/limits-derivatives-and-integrals/ssssswj1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-derivatives-and-integrals/ssssswj1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-derivatives-and-integrals/ssssswj1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-derivatives-and-integrals/ssssswj1"/>
      <lastmod>2026-11-02T15:02:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/limits-derivatives-and-integrals/ssssswj1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-derivatives-and-integrals/ssssswj1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-derivatives-and-integrals/ssssswj1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-derivatives-and-integrals/ssssswj1"/>
      <lastmod>2026-11-02T15:02:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/limits-of-sequences-and-series/ssssswjm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-of-sequences-and-series/ssssswjm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-of-sequences-and-series/ssssswjm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-of-sequences-and-series/ssssswjm"/>
      <lastmod>2026-11-01T23:37:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/limits-of-sequences-and-series/ssssswjm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-of-sequences-and-series/ssssswjm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-of-sequences-and-series/ssssswjm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-of-sequences-and-series/ssssswjm"/>
      <lastmod>2026-11-01T23:37:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformation-from-a-cube-to-a-rhombic-triacontahedron/ssssswjj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformation-from-a-cube-to-a-rhombic-triacontahedron/ssssswjj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformation-from-a-cube-to-a-rhombic-triacontahedron/ssssswjj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformation-from-a-cube-to-a-rhombic-triacontahedron/ssssswjj"/>
      <lastmod>2026-11-02T17:37:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformation-from-a-cube-to-a-rhombic-triacontahedron/ssssswjj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformation-from-a-cube-to-a-rhombic-triacontahedron/ssssswjj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformation-from-a-cube-to-a-rhombic-triacontahedron/ssssswjj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformation-from-a-cube-to-a-rhombic-triacontahedron/ssssswjj"/>
      <lastmod>2026-11-02T17:37:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-with-diagonals/ssssswjp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-with-diagonals/ssssswjp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-with-diagonals/ssssswjp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-with-diagonals/ssssswjp"/>
      <lastmod>2026-11-02T18:19:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-with-diagonals/ssssswjp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-with-diagonals/ssssswjp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-with-diagonals/ssssswjp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-with-diagonals/ssssswjp"/>
      <lastmod>2026-11-02T18:19:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-special-points-of-a-triangle/ssssswjw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-special-points-of-a-triangle/ssssswjw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-special-points-of-a-triangle/ssssswjw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-special-points-of-a-triangle/ssssswjw"/>
      <lastmod>2026-11-01T21:20:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-special-points-of-a-triangle/ssssswjw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-special-points-of-a-triangle/ssssswjw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-special-points-of-a-triangle/ssssswjw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-special-points-of-a-triangle/ssssswjw"/>
      <lastmod>2026-11-01T21:20:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-of-shapes-by-alba-manso/ssssswj6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-of-shapes-by-alba-manso/ssssswj6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-of-shapes-by-alba-manso/ssssswj6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-of-shapes-by-alba-manso/ssssswj6"/>
      <lastmod>2026-11-02T18:50:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-of-shapes-by-alba-manso/ssssswj6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-of-shapes-by-alba-manso/ssssswj6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-of-shapes-by-alba-manso/ssssswj6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-of-shapes-by-alba-manso/ssssswj6"/>
      <lastmod>2026-11-02T18:50:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-graphs-of-exponential-functions/ssssswjg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-graphs-of-exponential-functions/ssssswjg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-graphs-of-exponential-functions/ssssswjg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-graphs-of-exponential-functions/ssssswjg"/>
      <lastmod>2026-11-02T17:37:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-graphs-of-exponential-functions/ssssswjg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-graphs-of-exponential-functions/ssssswjg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-graphs-of-exponential-functions/ssssswjg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-graphs-of-exponential-functions/ssssswjg"/>
      <lastmod>2026-11-02T17:37:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-demonstration-by-fountainmath/ssssswj9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-demonstration-by-fountainmath/ssssswj9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-demonstration-by-fountainmath/ssssswj9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-demonstration-by-fountainmath/ssssswj9"/>
      <lastmod>2026-11-02T02:50:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-demonstration-by-fountainmath/ssssswj9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-demonstration-by-fountainmath/ssssswj9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-demonstration-by-fountainmath/ssssswj9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-demonstration-by-fountainmath/ssssswj9"/>
      <lastmod>2026-11-02T02:50:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-inequalities-by-w-gary-martin/ssssswje</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-inequalities-by-w-gary-martin/ssssswje"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-inequalities-by-w-gary-martin/ssssswje"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-inequalities-by-w-gary-martin/ssssswje"/>
      <lastmod>2026-11-02T18:43:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-inequalities-by-w-gary-martin/ssssswje</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-inequalities-by-w-gary-martin/ssssswje"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-inequalities-by-w-gary-martin/ssssswje"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-inequalities-by-w-gary-martin/ssssswje"/>
      <lastmod>2026-11-02T18:43:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoid-base-angles-conjecture/ssssswjv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-base-angles-conjecture/ssssswjv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-base-angles-conjecture/ssssswjv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-base-angles-conjecture/ssssswjv"/>
      <lastmod>2026-11-01T19:22:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoid-base-angles-conjecture/ssssswjv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-base-angles-conjecture/ssssswjv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoid-base-angles-conjecture/ssssswjv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoid-base-angles-conjecture/ssssswjv"/>
      <lastmod>2026-11-01T19:22:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotational-symmetry-by-mr-krebs/ssssswj4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-mr-krebs/ssssswj4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-by-mr-krebs/ssssswj4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-mr-krebs/ssssswj4"/>
      <lastmod>2026-11-02T08:55:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotational-symmetry-by-mr-krebs/ssssswj4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-mr-krebs/ssssswj4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotational-symmetry-by-mr-krebs/ssssswj4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotational-symmetry-by-mr-krebs/ssssswj4"/>
      <lastmod>2026-11-02T08:55:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/string-hyperbola-construction-and-geometric-relations/ssssswjl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/string-hyperbola-construction-and-geometric-relations/ssssswjl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/string-hyperbola-construction-and-geometric-relations/ssssswjl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/string-hyperbola-construction-and-geometric-relations/ssssswjl"/>
      <lastmod>2026-11-02T02:57:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/string-hyperbola-construction-and-geometric-relations/ssssswjl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/string-hyperbola-construction-and-geometric-relations/ssssswjl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/string-hyperbola-construction-and-geometric-relations/ssssswjl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/string-hyperbola-construction-and-geometric-relations/ssssswjl"/>
      <lastmod>2026-11-02T02:57:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/what-are-probabilities-im-7-8-3-practice/ssssswjy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/what-are-probabilities-im-7-8-3-practice/ssssswjy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/what-are-probabilities-im-7-8-3-practice/ssssswjy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/what-are-probabilities-im-7-8-3-practice/ssssswjy"/>
      <lastmod>2026-11-01T22:51:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/what-are-probabilities-im-7-8-3-practice/ssssswjy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/what-are-probabilities-im-7-8-3-practice/ssssswjy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/what-are-probabilities-im-7-8-3-practice/ssssswjy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/what-are-probabilities-im-7-8-3-practice/ssssswjy"/>
      <lastmod>2026-11-01T22:51:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/system-of-equation-solution-identification/ssssswja</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/system-of-equation-solution-identification/ssssswja"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/system-of-equation-solution-identification/ssssswja"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/system-of-equation-solution-identification/ssssswja"/>
      <lastmod>2026-11-02T13:02:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/system-of-equation-solution-identification/ssssswja</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/system-of-equation-solution-identification/ssssswja"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/system-of-equation-solution-identification/ssssswja"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/system-of-equation-solution-identification/ssssswja"/>
      <lastmod>2026-11-02T13:02:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/more-examples-of-parallelogram-areas/ssssswjc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/more-examples-of-parallelogram-areas/ssssswjc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/more-examples-of-parallelogram-areas/ssssswjc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/more-examples-of-parallelogram-areas/ssssswjc"/>
      <lastmod>2026-11-02T16:42:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/more-examples-of-parallelogram-areas/ssssswjc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/more-examples-of-parallelogram-areas/ssssswjc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/more-examples-of-parallelogram-areas/ssssswjc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/more-examples-of-parallelogram-areas/ssssswjc"/>
      <lastmod>2026-11-02T16:42:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/forearm-to-hand-ratio/ssssswjr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/forearm-to-hand-ratio/ssssswjr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/forearm-to-hand-ratio/ssssswjr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/forearm-to-hand-ratio/ssssswjr"/>
      <lastmod>2026-11-02T09:29:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/forearm-to-hand-ratio/ssssswjr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/forearm-to-hand-ratio/ssssswjr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/forearm-to-hand-ratio/ssssswjr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/forearm-to-hand-ratio/ssssswjr"/>
      <lastmod>2026-11-02T09:29:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/helical-slide-regular-heptagon-cross-section/ssssswjh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/helical-slide-regular-heptagon-cross-section/ssssswjh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/helical-slide-regular-heptagon-cross-section/ssssswjh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/helical-slide-regular-heptagon-cross-section/ssssswjh"/>
      <lastmod>2026-11-01T20:55:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/helical-slide-regular-heptagon-cross-section/ssssswjh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/helical-slide-regular-heptagon-cross-section/ssssswjh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/helical-slide-regular-heptagon-cross-section/ssssswjh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/helical-slide-regular-heptagon-cross-section/ssssswjh"/>
      <lastmod>2026-11-01T20:55:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/maximizing-volume/ssssswjt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximizing-volume/ssssswjt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximizing-volume/ssssswjt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximizing-volume/ssssswjt"/>
      <lastmod>2026-11-01T23:54:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/maximizing-volume/ssssswjt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/maximizing-volume/ssssswjt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/maximizing-volume/ssssswjt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/maximizing-volume/ssssswjt"/>
      <lastmod>2026-11-01T23:54:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelepiped-construction-example/ssssswjx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelepiped-construction-example/ssssswjx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelepiped-construction-example/ssssswjx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelepiped-construction-example/ssssswjx"/>
      <lastmod>2026-11-01T21:30:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelepiped-construction-example/ssssswjx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelepiped-construction-example/ssssswjx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelepiped-construction-example/ssssswjx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelepiped-construction-example/ssssswjx"/>
      <lastmod>2026-11-01T21:30:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-at-point-demo/ssssswji</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-at-point-demo/ssssswji"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-at-point-demo/ssssswji"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-at-point-demo/ssssswji"/>
      <lastmod>2026-11-01T19:35:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-at-point-demo/ssssswji</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-at-point-demo/ssssswji"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-at-point-demo/ssssswji"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-at-point-demo/ssssswji"/>
      <lastmod>2026-11-01T19:35:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-function/ssssswjo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-function/ssssswjo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-function/ssssswjo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-function/ssssswjo"/>
      <lastmod>2026-11-02T00:48:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-function/ssssswjo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-function/ssssswjo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-function/ssssswjo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-function/ssssswjo"/>
      <lastmod>2026-11-02T00:48:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstrating-parabola-with-varying-coefficients/ssssswps</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-parabola-with-varying-coefficients/ssssswps"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-parabola-with-varying-coefficients/ssssswps"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-parabola-with-varying-coefficients/ssssswps"/>
      <lastmod>2026-11-02T17:13:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstrating-parabola-with-varying-coefficients/ssssswps</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-parabola-with-varying-coefficients/ssssswps"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-parabola-with-varying-coefficients/ssssswps"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-parabola-with-varying-coefficients/ssssswps"/>
      <lastmod>2026-11-02T17:13:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/absolute-value-equations-and-inequalities/ssssswp7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/absolute-value-equations-and-inequalities/ssssswp7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/absolute-value-equations-and-inequalities/ssssswp7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/absolute-value-equations-and-inequalities/ssssswp7"/>
      <lastmod>2026-11-02T16:37:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/absolute-value-equations-and-inequalities/ssssswp7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/absolute-value-equations-and-inequalities/ssssswp7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/absolute-value-equations-and-inequalities/ssssswp7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/absolute-value-equations-and-inequalities/ssssswp7"/>
      <lastmod>2026-11-02T16:37:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/analog-clock/ssssswpn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/analog-clock/ssssswpn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/analog-clock/ssssswpn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/analog-clock/ssssswpn"/>
      <lastmod>2026-11-01T19:29:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/analog-clock/ssssswpn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/analog-clock/ssssswpn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/analog-clock/ssssswpn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/analog-clock/ssssswpn"/>
      <lastmod>2026-11-01T19:29:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cross-sections-of-tumbling-cone/ssssswp2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-sections-of-tumbling-cone/ssssswp2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-sections-of-tumbling-cone/ssssswp2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-sections-of-tumbling-cone/ssssswp2"/>
      <lastmod>2026-11-02T02:30:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cross-sections-of-tumbling-cone/ssssswp2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-sections-of-tumbling-cone/ssssswp2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-sections-of-tumbling-cone/ssssswp2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-sections-of-tumbling-cone/ssssswp2"/>
      <lastmod>2026-11-02T02:30:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/extra-practice-solving-equations/ssssswpk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/extra-practice-solving-equations/ssssswpk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/extra-practice-solving-equations/ssssswpk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/extra-practice-solving-equations/ssssswpk"/>
      <lastmod>2026-11-02T17:17:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/extra-practice-solving-equations/ssssswpk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/extra-practice-solving-equations/ssssswpk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/extra-practice-solving-equations/ssssswpk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/extra-practice-solving-equations/ssssswpk"/>
      <lastmod>2026-11-02T17:17:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformations-translation-reflection-rotation/ssssswpz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-translation-reflection-rotation/ssssswpz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-translation-reflection-rotation/ssssswpz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-translation-reflection-rotation/ssssswpz"/>
      <lastmod>2026-11-02T00:41:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformations-translation-reflection-rotation/ssssswpz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-translation-reflection-rotation/ssssswpz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-translation-reflection-rotation/ssssswpz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-translation-reflection-rotation/ssssswpz"/>
      <lastmod>2026-11-02T00:41:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-properties-by-jeff-rice/ssssswp0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-properties-by-jeff-rice/ssssswp0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-properties-by-jeff-rice/ssssswp0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-properties-by-jeff-rice/ssssswp0"/>
      <lastmod>2026-11-01T19:23:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-properties-by-jeff-rice/ssssswp0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-properties-by-jeff-rice/ssssswp0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-properties-by-jeff-rice/ssssswp0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-properties-by-jeff-rice/ssssswp0"/>
      <lastmod>2026-11-01T19:23:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-triangular-prism/ssssswpd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-triangular-prism/ssssswpd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-triangular-prism/ssssswpd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-triangular-prism/ssssswpd"/>
      <lastmod>2026-11-01T22:00:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-triangular-prism/ssssswpd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-triangular-prism/ssssswpd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-triangular-prism/ssssswpd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-triangular-prism/ssssswpd"/>
      <lastmod>2026-11-01T22:00:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/combining-a-right-triangle-and-two-squares/ssssswpf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/combining-a-right-triangle-and-two-squares/ssssswpf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/combining-a-right-triangle-and-two-squares/ssssswpf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/combining-a-right-triangle-and-two-squares/ssssswpf"/>
      <lastmod>2026-11-01T23:32:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/combining-a-right-triangle-and-two-squares/ssssswpf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/combining-a-right-triangle-and-two-squares/ssssswpf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/combining-a-right-triangle-and-two-squares/ssssswpf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/combining-a-right-triangle-and-two-squares/ssssswpf"/>
      <lastmod>2026-11-01T23:32:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/daisy-a-playful-combination-of-parametric-curves-and-geometric-transformations/ssssswp8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/daisy-a-playful-combination-of-parametric-curves-and-geometric-transformations/ssssswp8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/daisy-a-playful-combination-of-parametric-curves-and-geometric-transformations/ssssswp8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/daisy-a-playful-combination-of-parametric-curves-and-geometric-transformations/ssssswp8"/>
      <lastmod>2026-11-01T19:07:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/daisy-a-playful-combination-of-parametric-curves-and-geometric-transformations/ssssswp8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/daisy-a-playful-combination-of-parametric-curves-and-geometric-transformations/ssssswp8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/daisy-a-playful-combination-of-parametric-curves-and-geometric-transformations/ssssswp8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/daisy-a-playful-combination-of-parametric-curves-and-geometric-transformations/ssssswp8"/>
      <lastmod>2026-11-01T19:07:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/algebraic-surfaces/ssssswpu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebraic-surfaces/ssssswpu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebraic-surfaces/ssssswpu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebraic-surfaces/ssssswpu"/>
      <lastmod>2026-11-02T16:32:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/algebraic-surfaces/ssssswpu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebraic-surfaces/ssssswpu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebraic-surfaces/ssssswpu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebraic-surfaces/ssssswpu"/>
      <lastmod>2026-11-02T16:32:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/my-own-exponents-game/ssssswp5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/my-own-exponents-game/ssssswp5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/my-own-exponents-game/ssssswp5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/my-own-exponents-game/ssssswp5"/>
      <lastmod>2026-11-02T18:01:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/my-own-exponents-game/ssssswp5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/my-own-exponents-game/ssssswp5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/my-own-exponents-game/ssssswp5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/my-own-exponents-game/ssssswp5"/>
      <lastmod>2026-11-02T18:01:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/theft-data-histogram/ssssswpb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/theft-data-histogram/ssssswpb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/theft-data-histogram/ssssswpb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/theft-data-histogram/ssssswpb"/>
      <lastmod>2026-11-02T12:44:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/theft-data-histogram/ssssswpb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/theft-data-histogram/ssssswpb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/theft-data-histogram/ssssswpb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/theft-data-histogram/ssssswpb"/>
      <lastmod>2026-11-02T12:44:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-polygon-and-sequence-construction-example/ssssswp3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-polygon-and-sequence-construction-example/ssssswp3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-polygon-and-sequence-construction-example/ssssswp3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-polygon-and-sequence-construction-example/ssssswp3"/>
      <lastmod>2026-11-02T03:03:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-polygon-and-sequence-construction-example/ssssswp3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-polygon-and-sequence-construction-example/ssssswp3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-polygon-and-sequence-construction-example/ssssswp3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-polygon-and-sequence-construction-example/ssssswp3"/>
      <lastmod>2026-11-02T03:03:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/observing-triangle-inequality/ssssswpq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/observing-triangle-inequality/ssssswpq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/observing-triangle-inequality/ssssswpq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/observing-triangle-inequality/ssssswpq"/>
      <lastmod>2026-11-01T23:10:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/observing-triangle-inequality/ssssswpq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/observing-triangle-inequality/ssssswpq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/observing-triangle-inequality/ssssswpq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/observing-triangle-inequality/ssssswpq"/>
      <lastmod>2026-11-01T23:10:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/describing-parabolas/ssssswp1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/describing-parabolas/ssssswp1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/describing-parabolas/ssssswp1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/describing-parabolas/ssssswp1"/>
      <lastmod>2026-11-02T12:48:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/describing-parabolas/ssssswp1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/describing-parabolas/ssssswp1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/describing-parabolas/ssssswp1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/describing-parabolas/ssssswp1"/>
      <lastmod>2026-11-02T12:48:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-a-parallel-line-through-a-point/ssssswpm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-parallel-line-through-a-point/ssssswpm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-parallel-line-through-a-point/ssssswpm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-parallel-line-through-a-point/ssssswpm"/>
      <lastmod>2026-11-02T06:35:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-a-parallel-line-through-a-point/ssssswpm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-a-parallel-line-through-a-point/ssssswpm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-a-parallel-line-through-a-point/ssssswpm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-a-parallel-line-through-a-point/ssssswpm"/>
      <lastmod>2026-11-02T06:35:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/phasor-addition-demo/ssssswpj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phasor-addition-demo/ssssswpj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phasor-addition-demo/ssssswpj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phasor-addition-demo/ssssswpj"/>
      <lastmod>2026-11-01T23:22:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/phasor-addition-demo/ssssswpj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phasor-addition-demo/ssssswpj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phasor-addition-demo/ssssswpj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phasor-addition-demo/ssssswpj"/>
      <lastmod>2026-11-01T23:22:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadrilaterals-exploration-trapezoid-isosceles-trapezoid-and-kite/ssssswpp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilaterals-exploration-trapezoid-isosceles-trapezoid-and-kite/ssssswpp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilaterals-exploration-trapezoid-isosceles-trapezoid-and-kite/ssssswpp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilaterals-exploration-trapezoid-isosceles-trapezoid-and-kite/ssssswpp"/>
      <lastmod>2026-11-02T18:36:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadrilaterals-exploration-trapezoid-isosceles-trapezoid-and-kite/ssssswpp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilaterals-exploration-trapezoid-isosceles-trapezoid-and-kite/ssssswpp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilaterals-exploration-trapezoid-isosceles-trapezoid-and-kite/ssssswpp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilaterals-exploration-trapezoid-isosceles-trapezoid-and-kite/ssssswpp"/>
      <lastmod>2026-11-02T18:36:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/small-angle-limits/ssssswpw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/small-angle-limits/ssssswpw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/small-angle-limits/ssssswpw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/small-angle-limits/ssssswpw"/>
      <lastmod>2026-11-01T21:18:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/small-angle-limits/ssssswpw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/small-angle-limits/ssssswpw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/small-angle-limits/ssssswpw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/small-angle-limits/ssssswpw"/>
      <lastmod>2026-11-01T21:18:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-8-3-8-practice-translating-to-y-mx-b/ssssswp6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-8-3-8-practice-translating-to-y-mx-b/ssssswp6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-8-3-8-practice-translating-to-y-mx-b/ssssswp6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-8-3-8-practice-translating-to-y-mx-b/ssssswp6"/>
      <lastmod>2026-11-01T20:23:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-8-3-8-practice-translating-to-y-mx-b/ssssswp6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-8-3-8-practice-translating-to-y-mx-b/ssssswp6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-8-3-8-practice-translating-to-y-mx-b/ssssswp6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-8-3-8-practice-translating-to-y-mx-b/ssssswp6"/>
      <lastmod>2026-11-01T20:23:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/step-1-basic-geometric-construction/ssssswpg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/step-1-basic-geometric-construction/ssssswpg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/step-1-basic-geometric-construction/ssssswpg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/step-1-basic-geometric-construction/ssssswpg"/>
      <lastmod>2026-11-02T17:12:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/step-1-basic-geometric-construction/ssssswpg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/step-1-basic-geometric-construction/ssssswpg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/step-1-basic-geometric-construction/ssssswpg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/step-1-basic-geometric-construction/ssssswpg"/>
      <lastmod>2026-11-02T17:12:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inverse-of-non-singular-matrices/ssssswp9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inverse-of-non-singular-matrices/ssssswp9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inverse-of-non-singular-matrices/ssssswp9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inverse-of-non-singular-matrices/ssssswp9"/>
      <lastmod>2026-11-01T21:59:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inverse-of-non-singular-matrices/ssssswp9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inverse-of-non-singular-matrices/ssssswp9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inverse-of-non-singular-matrices/ssssswp9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inverse-of-non-singular-matrices/ssssswp9"/>
      <lastmod>2026-11-01T21:59:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-pm-demo/ssssswpe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-pm-demo/ssssswpe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wallpaper-symmetry-group-pm-demo/ssssswpe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-pm-demo/ssssswpe"/>
      <lastmod>2026-11-02T09:01:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wallpaper-symmetry-group-pm-demo/ssssswpe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-pm-demo/ssssswpe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wallpaper-symmetry-group-pm-demo/ssssswpe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wallpaper-symmetry-group-pm-demo/ssssswpe"/>
      <lastmod>2026-11-02T09:01:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-template-with-investigation-questions-g-gco-10/ssssswpv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-template-with-investigation-questions-g-gco-10/ssssswpv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-template-with-investigation-questions-g-gco-10/ssssswpv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-template-with-investigation-questions-g-gco-10/ssssswpv"/>
      <lastmod>2026-11-01T21:51:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-template-with-investigation-questions-g-gco-10/ssssswpv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-template-with-investigation-questions-g-gco-10/ssssswpv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-template-with-investigation-questions-g-gco-10/ssssswpv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-template-with-investigation-questions-g-gco-10/ssssswpv"/>
      <lastmod>2026-11-01T21:51:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-the-paris-chamber-of-commerce-logo/ssssswp4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-paris-chamber-of-commerce-logo/ssssswp4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-the-paris-chamber-of-commerce-logo/ssssswp4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-paris-chamber-of-commerce-logo/ssssswp4"/>
      <lastmod>2026-11-01T19:34:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-the-paris-chamber-of-commerce-logo/ssssswp4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-paris-chamber-of-commerce-logo/ssssswp4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-the-paris-chamber-of-commerce-logo/ssssswp4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-the-paris-chamber-of-commerce-logo/ssssswp4"/>
      <lastmod>2026-11-01T19:34:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solve-system-using-elimination/ssssswpl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solve-system-using-elimination/ssssswpl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solve-system-using-elimination/ssssswpl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solve-system-using-elimination/ssssswpl"/>
      <lastmod>2026-11-02T18:41:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solve-system-using-elimination/ssssswpl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solve-system-using-elimination/ssssswpl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solve-system-using-elimination/ssssswpl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solve-system-using-elimination/ssssswpl"/>
      <lastmod>2026-11-02T18:41:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/andromeda-a-3d-cube-and-polyhedral-geometry-construction/ssssswpy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/andromeda-a-3d-cube-and-polyhedral-geometry-construction/ssssswpy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/andromeda-a-3d-cube-and-polyhedral-geometry-construction/ssssswpy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/andromeda-a-3d-cube-and-polyhedral-geometry-construction/ssssswpy"/>
      <lastmod>2026-11-01T19:30:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/andromeda-a-3d-cube-and-polyhedral-geometry-construction/ssssswpy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/andromeda-a-3d-cube-and-polyhedral-geometry-construction/ssssswpy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/andromeda-a-3d-cube-and-polyhedral-geometry-construction/ssssswpy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/andromeda-a-3d-cube-and-polyhedral-geometry-construction/ssssswpy"/>
      <lastmod>2026-11-01T19:30:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/congruence-postulates/ssssswpa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruence-postulates/ssssswpa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruence-postulates/ssssswpa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruence-postulates/ssssswpa"/>
      <lastmod>2026-11-02T02:59:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/congruence-postulates/ssssswpa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruence-postulates/ssssswpa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruence-postulates/ssssswpa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruence-postulates/ssssswpa"/>
      <lastmod>2026-11-02T02:59:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angles-in-circles-exploring-inscribed-and-central-angles/ssssswpc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-in-circles-exploring-inscribed-and-central-angles/ssssswpc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-in-circles-exploring-inscribed-and-central-angles/ssssswpc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-in-circles-exploring-inscribed-and-central-angles/ssssswpc"/>
      <lastmod>2026-11-02T02:18:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angles-in-circles-exploring-inscribed-and-central-angles/ssssswpc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angles-in-circles-exploring-inscribed-and-central-angles/ssssswpc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angles-in-circles-exploring-inscribed-and-central-angles/ssssswpc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angles-in-circles-exploring-inscribed-and-central-angles/ssssswpc"/>
      <lastmod>2026-11-02T02:18:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-equations-and-inequalities/ssssswpr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-and-inequalities/ssssswpr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-and-inequalities/ssssswpr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-and-inequalities/ssssswpr"/>
      <lastmod>2026-11-02T12:01:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-equations-and-inequalities/ssssswpr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-equations-and-inequalities/ssssswpr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-equations-and-inequalities/ssssswpr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-equations-and-inequalities/ssssswpr"/>
      <lastmod>2026-11-02T12:01:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-net-of-a-hexagonal-prism/ssssswph</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-net-of-a-hexagonal-prism/ssssswph"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-net-of-a-hexagonal-prism/ssssswph"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-net-of-a-hexagonal-prism/ssssswph"/>
      <lastmod>2026-11-02T11:05:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-net-of-a-hexagonal-prism/ssssswph</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-net-of-a-hexagonal-prism/ssssswph"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-net-of-a-hexagonal-prism/ssssswph"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-net-of-a-hexagonal-prism/ssssswph"/>
      <lastmod>2026-11-02T11:05:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/non-circular-cylinder-and-cone/ssssswpt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/non-circular-cylinder-and-cone/ssssswpt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/non-circular-cylinder-and-cone/ssssswpt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/non-circular-cylinder-and-cone/ssssswpt"/>
      <lastmod>2026-11-01T20:50:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/non-circular-cylinder-and-cone/ssssswpt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/non-circular-cylinder-and-cone/ssssswpt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/non-circular-cylinder-and-cone/ssssswpt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/non-circular-cylinder-and-cone/ssssswpt"/>
      <lastmod>2026-11-01T20:50:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/counting-squares-on-a-chessboard/ssssswpx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/counting-squares-on-a-chessboard/ssssswpx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/counting-squares-on-a-chessboard/ssssswpx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/counting-squares-on-a-chessboard/ssssswpx"/>
      <lastmod>2026-11-01T21:17:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/counting-squares-on-a-chessboard/ssssswpx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/counting-squares-on-a-chessboard/ssssswpx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/counting-squares-on-a-chessboard/ssssswpx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/counting-squares-on-a-chessboard/ssssswpx"/>
      <lastmod>2026-11-01T21:17:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangular-prism-construction-and-calculus-demo/ssssswpi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-prism-construction-and-calculus-demo/ssssswpi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-prism-construction-and-calculus-demo/ssssswpi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-prism-construction-and-calculus-demo/ssssswpi"/>
      <lastmod>2026-11-01T22:00:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangular-prism-construction-and-calculus-demo/ssssswpi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-prism-construction-and-calculus-demo/ssssswpi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-prism-construction-and-calculus-demo/ssssswpi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-prism-construction-and-calculus-demo/ssssswpi"/>
      <lastmod>2026-11-01T22:00:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/truncated-cube-demonstration/ssssswpo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-cube-demonstration/ssssswpo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-cube-demonstration/ssssswpo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-cube-demonstration/ssssswpo"/>
      <lastmod>2026-11-02T18:58:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/truncated-cube-demonstration/ssssswpo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/truncated-cube-demonstration/ssssswpo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/truncated-cube-demonstration/ssssswpo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/truncated-cube-demonstration/ssssswpo"/>
      <lastmod>2026-11-02T18:58:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/centripetal-acceleration/ssssswws</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/centripetal-acceleration/ssssswws"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/centripetal-acceleration/ssssswws"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/centripetal-acceleration/ssssswws"/>
      <lastmod>2026-11-01T23:08:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/centripetal-acceleration/ssssswws</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/centripetal-acceleration/ssssswws"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/centripetal-acceleration/ssssswws"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/centripetal-acceleration/ssssswws"/>
      <lastmod>2026-11-01T23:08:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflection-of-y-ax-parabola-transformation/sssssww7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-of-y-ax-parabola-transformation/sssssww7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-of-y-ax-parabola-transformation/sssssww7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-of-y-ax-parabola-transformation/sssssww7"/>
      <lastmod>2026-11-02T18:38:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflection-of-y-ax-parabola-transformation/sssssww7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflection-of-y-ax-parabola-transformation/sssssww7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflection-of-y-ax-parabola-transformation/sssssww7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflection-of-y-ax-parabola-transformation/sssssww7"/>
      <lastmod>2026-11-02T18:38:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interior-angle-bisector-construction/ssssswwn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interior-angle-bisector-construction/ssssswwn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interior-angle-bisector-construction/ssssswwn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interior-angle-bisector-construction/ssssswwn"/>
      <lastmod>2026-11-02T12:31:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interior-angle-bisector-construction/ssssswwn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interior-angle-bisector-construction/ssssswwn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interior-angle-bisector-construction/ssssswwn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interior-angle-bisector-construction/ssssswwn"/>
      <lastmod>2026-11-02T12:31:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-slice-area-calculation-by-timur-kapitsa/sssssww2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-slice-area-calculation-by-timur-kapitsa/sssssww2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-slice-area-calculation-by-timur-kapitsa/sssssww2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-slice-area-calculation-by-timur-kapitsa/sssssww2"/>
      <lastmod>2026-11-02T02:28:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-slice-area-calculation-by-timur-kapitsa/sssssww2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-slice-area-calculation-by-timur-kapitsa/sssssww2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-slice-area-calculation-by-timur-kapitsa/sssssww2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-slice-area-calculation-by-timur-kapitsa/sssssww2"/>
      <lastmod>2026-11-02T02:28:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-demonstration/ssssswwk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-demonstration/ssssswwk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-demonstration/ssssswwk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-demonstration/ssssswwk"/>
      <lastmod>2026-11-02T02:32:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-demonstration/ssssswwk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-demonstration/ssssswwk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-demonstration/ssssswwk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-demonstration/ssssswwk"/>
      <lastmod>2026-11-02T02:32:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-vectors-basis-vectors-and-span/ssssswwz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-vectors-basis-vectors-and-span/ssssswwz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-vectors-basis-vectors-and-span/ssssswwz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-vectors-basis-vectors-and-span/ssssswwz"/>
      <lastmod>2026-11-02T16:35:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-vectors-basis-vectors-and-span/ssssswwz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-vectors-basis-vectors-and-span/ssssswwz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-vectors-basis-vectors-and-span/ssssswwz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-vectors-basis-vectors-and-span/ssssswwz"/>
      <lastmod>2026-11-02T16:35:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-fraction-multiplication-demo/sssssww0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-fraction-multiplication-demo/sssssww0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-fraction-multiplication-demo/sssssww0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-fraction-multiplication-demo/sssssww0"/>
      <lastmod>2026-11-02T00:30:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-fraction-multiplication-demo/sssssww0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-fraction-multiplication-demo/sssssww0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-fraction-multiplication-demo/sssssww0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-fraction-multiplication-demo/sssssww0"/>
      <lastmod>2026-11-02T00:30:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-perimeters-of-polygons/ssssswwd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-perimeters-of-polygons/ssssswwd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-perimeters-of-polygons/ssssswwd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-perimeters-of-polygons/ssssswwd"/>
      <lastmod>2026-11-01T23:58:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-perimeters-of-polygons/ssssswwd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-perimeters-of-polygons/ssssswwd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-perimeters-of-polygons/ssssswwd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-perimeters-of-polygons/ssssswwd"/>
      <lastmod>2026-11-01T23:58:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solve-two-step-inequalities/ssssswwf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solve-two-step-inequalities/ssssswwf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solve-two-step-inequalities/ssssswwf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solve-two-step-inequalities/ssssswwf"/>
      <lastmod>2026-11-01T20:22:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solve-two-step-inequalities/ssssswwf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solve-two-step-inequalities/ssssswwf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solve-two-step-inequalities/ssssswwf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solve-two-step-inequalities/ssssswwf"/>
      <lastmod>2026-11-01T20:22:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/egyptian-pyramids/sssssww8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/egyptian-pyramids/sssssww8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/egyptian-pyramids/sssssww8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/egyptian-pyramids/sssssww8"/>
      <lastmod>2026-11-02T09:38:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/egyptian-pyramids/sssssww8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/egyptian-pyramids/sssssww8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/egyptian-pyramids/sssssww8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/egyptian-pyramids/sssssww8"/>
      <lastmod>2026-11-02T09:38:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/forces-on-a-parachutist/ssssswwu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/forces-on-a-parachutist/ssssswwu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/forces-on-a-parachutist/ssssswwu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/forces-on-a-parachutist/ssssswwu"/>
      <lastmod>2026-11-01T19:11:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/forces-on-a-parachutist/ssssswwu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/forces-on-a-parachutist/ssssswwu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/forces-on-a-parachutist/ssssswwu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/forces-on-a-parachutist/ssssswwu"/>
      <lastmod>2026-11-01T19:11:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/corner-shop-logo/sssssww5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/corner-shop-logo/sssssww5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/corner-shop-logo/sssssww5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/corner-shop-logo/sssssww5"/>
      <lastmod>2026-11-01T19:21:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/corner-shop-logo/sssssww5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/corner-shop-logo/sssssww5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/corner-shop-logo/sssssww5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/corner-shop-logo/sssssww5"/>
      <lastmod>2026-11-01T19:21:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-of-prism-dynamic-geogebra-demonstration/ssssswwb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-prism-dynamic-geogebra-demonstration/ssssswwb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-prism-dynamic-geogebra-demonstration/ssssswwb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-prism-dynamic-geogebra-demonstration/ssssswwb"/>
      <lastmod>2026-11-01T21:41:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-of-prism-dynamic-geogebra-demonstration/ssssswwb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-of-prism-dynamic-geogebra-demonstration/ssssswwb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-of-prism-dynamic-geogebra-demonstration/ssssswwb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-of-prism-dynamic-geogebra-demonstration/ssssswwb"/>
      <lastmod>2026-11-01T21:41:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/poisson-probability-distribution-interactive-demo/sssssww3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/poisson-probability-distribution-interactive-demo/sssssww3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/poisson-probability-distribution-interactive-demo/sssssww3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/poisson-probability-distribution-interactive-demo/sssssww3"/>
      <lastmod>2026-11-02T18:03:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/poisson-probability-distribution-interactive-demo/sssssww3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/poisson-probability-distribution-interactive-demo/sssssww3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/poisson-probability-distribution-interactive-demo/sssssww3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/poisson-probability-distribution-interactive-demo/sssssww3"/>
      <lastmod>2026-11-02T18:03:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reciprocal-linear-functions/ssssswwq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reciprocal-linear-functions/ssssswwq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reciprocal-linear-functions/ssssswwq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reciprocal-linear-functions/ssssswwq"/>
      <lastmod>2026-11-01T21:58:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reciprocal-linear-functions/ssssswwq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reciprocal-linear-functions/ssssswwq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reciprocal-linear-functions/ssssswwq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reciprocal-linear-functions/ssssswwq"/>
      <lastmod>2026-11-01T21:58:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-balajothi-t/sssssww1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-balajothi-t/sssssww1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-demonstration-by-balajothi-t/sssssww1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-balajothi-t/sssssww1"/>
      <lastmod>2026-11-02T02:33:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-addition-demonstration-by-balajothi-t/sssssww1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-balajothi-t/sssssww1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-demonstration-by-balajothi-t/sssssww1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-demonstration-by-balajothi-t/sssssww1"/>
      <lastmod>2026-11-02T02:33:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conic-sections-under-light-projection/ssssswwm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-sections-under-light-projection/ssssswwm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-sections-under-light-projection/ssssswwm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-under-light-projection/ssssswwm"/>
      <lastmod>2026-11-01T20:48:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conic-sections-under-light-projection/ssssswwm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-sections-under-light-projection/ssssswwm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-sections-under-light-projection/ssssswwm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-under-light-projection/ssssswwm"/>
      <lastmod>2026-11-01T20:48:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-number-and-geometry-i-vector-addition/ssssswwj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-and-geometry-i-vector-addition/ssssswwj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-and-geometry-i-vector-addition/ssssswwj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-and-geometry-i-vector-addition/ssssswwj"/>
      <lastmod>2026-11-02T13:05:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-number-and-geometry-i-vector-addition/ssssswwj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-and-geometry-i-vector-addition/ssssswwj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-and-geometry-i-vector-addition/ssssswwj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-and-geometry-i-vector-addition/ssssswwj"/>
      <lastmod>2026-11-02T13:05:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-and-equilateral-triangle/ssssswwp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-and-equilateral-triangle/ssssswwp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-and-equilateral-triangle/ssssswwp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-and-equilateral-triangle/ssssswwp"/>
      <lastmod>2026-11-01T19:07:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-and-equilateral-triangle/ssssswwp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-and-equilateral-triangle/ssssswwp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-and-equilateral-triangle/ssssswwp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-and-equilateral-triangle/ssssswwp"/>
      <lastmod>2026-11-01T19:07:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-murphy-w/ssssswww</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-murphy-w/ssssswww"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-murphy-w/ssssswww"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-murphy-w/ssssswww"/>
      <lastmod>2026-11-02T08:52:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-murphy-w/ssssswww</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-murphy-w/ssssswww"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-murphy-w/ssssswww"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-murphy-w/ssssswww"/>
      <lastmod>2026-11-02T08:52:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-performance-task-version-2/sssssww6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-performance-task-version-2/sssssww6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-performance-task-version-2/sssssww6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-performance-task-version-2/sssssww6"/>
      <lastmod>2026-11-02T03:19:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-performance-task-version-2/sssssww6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-performance-task-version-2/sssssww6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-performance-task-version-2/sssssww6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-performance-task-version-2/sssssww6"/>
      <lastmod>2026-11-02T03:19:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/base-of-a-logarithmic-function/ssssswwg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/base-of-a-logarithmic-function/ssssswwg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/base-of-a-logarithmic-function/ssssswwg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/base-of-a-logarithmic-function/ssssswwg"/>
      <lastmod>2026-11-01T19:02:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/base-of-a-logarithmic-function/ssssswwg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/base-of-a-logarithmic-function/ssssswwg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/base-of-a-logarithmic-function/ssssswwg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/base-of-a-logarithmic-function/ssssswwg"/>
      <lastmod>2026-11-01T19:02:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-perpendicular-lines/sssssww9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-perpendicular-lines/sssssww9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-perpendicular-lines/sssssww9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-perpendicular-lines/sssssww9"/>
      <lastmod>2026-11-02T16:47:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-perpendicular-lines/sssssww9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-perpendicular-lines/sssssww9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-perpendicular-lines/sssssww9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-perpendicular-lines/sssssww9"/>
      <lastmod>2026-11-02T16:47:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-demo-equation-of-a-perpendicular-bisector/ssssswwe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-demo-equation-of-a-perpendicular-bisector/ssssswwe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-demo-equation-of-a-perpendicular-bisector/ssssswwe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-demo-equation-of-a-perpendicular-bisector/ssssswwe"/>
      <lastmod>2026-11-02T02:22:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-demo-equation-of-a-perpendicular-bisector/ssssswwe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-demo-equation-of-a-perpendicular-bisector/ssssswwe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-demo-equation-of-a-perpendicular-bisector/ssssswwe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-demo-equation-of-a-perpendicular-bisector/ssssswwe"/>
      <lastmod>2026-11-02T02:22:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-area-multiple-constructions-and-rotation-demo/ssssswwv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-area-multiple-constructions-and-rotation-demo/ssssswwv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-area-multiple-constructions-and-rotation-demo/ssssswwv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-area-multiple-constructions-and-rotation-demo/ssssswwv"/>
      <lastmod>2026-11-01T19:16:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-area-multiple-constructions-and-rotation-demo/ssssswwv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-area-multiple-constructions-and-rotation-demo/ssssswwv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-area-multiple-constructions-and-rotation-demo/ssssswwv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-area-multiple-constructions-and-rotation-demo/ssssswwv"/>
      <lastmod>2026-11-01T19:16:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/subtraction-as-distance-a-geometric-visualization/sssssww4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtraction-as-distance-a-geometric-visualization/sssssww4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtraction-as-distance-a-geometric-visualization/sssssww4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtraction-as-distance-a-geometric-visualization/sssssww4"/>
      <lastmod>2026-11-01T21:09:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/subtraction-as-distance-a-geometric-visualization/sssssww4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtraction-as-distance-a-geometric-visualization/sssssww4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtraction-as-distance-a-geometric-visualization/sssssww4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtraction-as-distance-a-geometric-visualization/sssssww4"/>
      <lastmod>2026-11-01T21:09:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/riemann-sphere-complex-number-geometry/ssssswwl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-sphere-complex-number-geometry/ssssswwl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-sphere-complex-number-geometry/ssssswwl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-sphere-complex-number-geometry/ssssswwl"/>
      <lastmod>2026-11-02T02:48:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/riemann-sphere-complex-number-geometry/ssssswwl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-sphere-complex-number-geometry/ssssswwl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-sphere-complex-number-geometry/ssssswwl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-sphere-complex-number-geometry/ssssswwl"/>
      <lastmod>2026-11-02T02:48:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-the-chain-rule/ssssswwy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-chain-rule/ssssswwy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-chain-rule/ssssswwy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-chain-rule/ssssswwy"/>
      <lastmod>2026-11-02T00:30:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-the-chain-rule/ssssswwy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-the-chain-rule/ssssswwy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-the-chain-rule/ssssswwy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-the-chain-rule/ssssswwy"/>
      <lastmod>2026-11-02T00:30:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-distributes-over-vector-addition/ssssswwa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-distributes-over-vector-addition/ssssswwa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-distributes-over-vector-addition/ssssswwa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-distributes-over-vector-addition/ssssswwa"/>
      <lastmod>2026-11-01T21:26:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-distributes-over-vector-addition/ssssswwa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-distributes-over-vector-addition/ssssswwa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-distributes-over-vector-addition/ssssswwa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-distributes-over-vector-addition/ssssswwa"/>
      <lastmod>2026-11-01T21:26:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/build-the-net-of-a-cube/ssssswwc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/build-the-net-of-a-cube/ssssswwc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/build-the-net-of-a-cube/ssssswwc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/build-the-net-of-a-cube/ssssswwc"/>
      <lastmod>2026-11-02T12:21:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/build-the-net-of-a-cube/ssssswwc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/build-the-net-of-a-cube/ssssswwc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/build-the-net-of-a-cube/ssssswwc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/build-the-net-of-a-cube/ssssswwc"/>
      <lastmod>2026-11-02T12:21:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-transformation-matrix-visualization-from-geometry-to-matrix-operations/ssssswwr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-transformation-matrix-visualization-from-geometry-to-matrix-operations/ssssswwr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-transformation-matrix-visualization-from-geometry-to-matrix-operations/ssssswwr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-transformation-matrix-visualization-from-geometry-to-matrix-operations/ssssswwr"/>
      <lastmod>2026-11-01T19:34:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-transformation-matrix-visualization-from-geometry-to-matrix-operations/ssssswwr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-transformation-matrix-visualization-from-geometry-to-matrix-operations/ssssswwr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-transformation-matrix-visualization-from-geometry-to-matrix-operations/ssssswwr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-transformation-matrix-visualization-from-geometry-to-matrix-operations/ssssswwr"/>
      <lastmod>2026-11-01T19:34:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/first-polygonal-numbers/ssssswwh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/first-polygonal-numbers/ssssswwh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/first-polygonal-numbers/ssssswwh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/first-polygonal-numbers/ssssswwh"/>
      <lastmod>2026-11-01T21:02:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/first-polygonal-numbers/ssssswwh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/first-polygonal-numbers/ssssswwh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/first-polygonal-numbers/ssssswwh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/first-polygonal-numbers/ssssswwh"/>
      <lastmod>2026-11-01T21:02:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/a-curve-to-the-same-curve-passing-through-another/ssssswwt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-curve-to-the-same-curve-passing-through-another/ssssswwt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-curve-to-the-same-curve-passing-through-another/ssssswwt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-curve-to-the-same-curve-passing-through-another/ssssswwt"/>
      <lastmod>2026-11-02T15:47:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/a-curve-to-the-same-curve-passing-through-another/ssssswwt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/a-curve-to-the-same-curve-passing-through-another/ssssswwt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/a-curve-to-the-same-curve-passing-through-another/ssssswwt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/a-curve-to-the-same-curve-passing-through-another/ssssswwt"/>
      <lastmod>2026-11-02T15:47:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-by-h-williams/ssssswwx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-by-h-williams/ssssswwx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-by-h-williams/ssssswwx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-by-h-williams/ssssswwx"/>
      <lastmod>2026-11-02T18:13:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-by-h-williams/ssssswwx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-by-h-williams/ssssswwx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-by-h-williams/ssssswwx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-by-h-williams/ssssswwx"/>
      <lastmod>2026-11-02T18:13:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trace-the-unit-circle/ssssswwi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trace-the-unit-circle/ssssswwi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trace-the-unit-circle/ssssswwi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trace-the-unit-circle/ssssswwi"/>
      <lastmod>2026-11-01T21:43:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trace-the-unit-circle/ssssswwi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trace-the-unit-circle/ssssswwi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trace-the-unit-circle/ssssswwi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trace-the-unit-circle/ssssswwi"/>
      <lastmod>2026-11-01T21:43:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-demonstration-of-vector-collinearity/ssssswwo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-vector-collinearity/ssssswwo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-vector-collinearity/ssssswwo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-vector-collinearity/ssssswwo"/>
      <lastmod>2026-11-02T17:59:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-demonstration-of-vector-collinearity/ssssswwo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-vector-collinearity/ssssswwo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-vector-collinearity/ssssswwo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-vector-collinearity/ssssswwo"/>
      <lastmod>2026-11-02T17:59:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-rotation-demo/sssssw6s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-rotation-demo/sssssw6s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-rotation-demo/sssssw6s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-rotation-demo/sssssw6s"/>
      <lastmod>2026-11-02T12:20:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-rotation-demo/sssssw6s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-rotation-demo/sssssw6s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-rotation-demo/sssssw6s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-rotation-demo/sssssw6s"/>
      <lastmod>2026-11-02T12:20:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solve-and-graph-inequalities/sssssw67</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solve-and-graph-inequalities/sssssw67"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solve-and-graph-inequalities/sssssw67"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solve-and-graph-inequalities/sssssw67"/>
      <lastmod>2026-11-02T16:36:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solve-and-graph-inequalities/sssssw67</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solve-and-graph-inequalities/sssssw67"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solve-and-graph-inequalities/sssssw67"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solve-and-graph-inequalities/sssssw67"/>
      <lastmod>2026-11-02T16:36:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplication-and-division-operations/sssssw6n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-and-division-operations/sssssw6n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-and-division-operations/sssssw6n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-and-division-operations/sssssw6n"/>
      <lastmod>2026-11-02T17:16:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplication-and-division-operations/sssssw6n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-and-division-operations/sssssw6n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-and-division-operations/sssssw6n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-and-division-operations/sssssw6n"/>
      <lastmod>2026-11-02T17:16:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-fraction-multiplication/sssssw62</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-fraction-multiplication/sssssw62"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-fraction-multiplication/sssssw62"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-fraction-multiplication/sssssw62"/>
      <lastmod>2026-11-02T16:56:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-fraction-multiplication/sssssw62</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-fraction-multiplication/sssssw62"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-fraction-multiplication/sssssw62"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-fraction-multiplication/sssssw62"/>
      <lastmod>2026-11-02T16:56:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploration-trigonometric-ratios-in-similar-triangles-aps/sssssw6k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploration-trigonometric-ratios-in-similar-triangles-aps/sssssw6k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploration-trigonometric-ratios-in-similar-triangles-aps/sssssw6k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploration-trigonometric-ratios-in-similar-triangles-aps/sssssw6k"/>
      <lastmod>2026-11-01T22:11:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploration-trigonometric-ratios-in-similar-triangles-aps/sssssw6k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploration-trigonometric-ratios-in-similar-triangles-aps/sssssw6k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploration-trigonometric-ratios-in-similar-triangles-aps/sssssw6k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploration-trigonometric-ratios-in-similar-triangles-aps/sssssw6k"/>
      <lastmod>2026-11-01T22:11:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bosnian-bearings-exploring-angles-and-reflection-in-navigation/sssssw6z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bosnian-bearings-exploring-angles-and-reflection-in-navigation/sssssw6z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bosnian-bearings-exploring-angles-and-reflection-in-navigation/sssssw6z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bosnian-bearings-exploring-angles-and-reflection-in-navigation/sssssw6z"/>
      <lastmod>2026-11-02T18:48:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bosnian-bearings-exploring-angles-and-reflection-in-navigation/sssssw6z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bosnian-bearings-exploring-angles-and-reflection-in-navigation/sssssw6z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bosnian-bearings-exploring-angles-and-reflection-in-navigation/sssssw6z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bosnian-bearings-exploring-angles-and-reflection-in-navigation/sssssw6z"/>
      <lastmod>2026-11-02T18:48:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-subtraction-quiz-random-practice-with-feedback/sssssw60</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-subtraction-quiz-random-practice-with-feedback/sssssw60"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-subtraction-quiz-random-practice-with-feedback/sssssw60"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-subtraction-quiz-random-practice-with-feedback/sssssw60"/>
      <lastmod>2026-11-02T07:34:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-subtraction-quiz-random-practice-with-feedback/sssssw60</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-subtraction-quiz-random-practice-with-feedback/sssssw60"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-subtraction-quiz-random-practice-with-feedback/sssssw60"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-subtraction-quiz-random-practice-with-feedback/sssssw60"/>
      <lastmod>2026-11-02T07:34:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-function-derivatives/sssssw6d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-function-derivatives/sssssw6d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-function-derivatives/sssssw6d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-function-derivatives/sssssw6d"/>
      <lastmod>2026-11-02T18:13:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-function-derivatives/sssssw6d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-function-derivatives/sssssw6d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-function-derivatives/sssssw6d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-function-derivatives/sssssw6d"/>
      <lastmod>2026-11-02T18:13:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graph-translation-by-mdeveaux/sssssw6f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-translation-by-mdeveaux/sssssw6f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-translation-by-mdeveaux/sssssw6f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-translation-by-mdeveaux/sssssw6f"/>
      <lastmod>2026-11-02T13:37:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graph-translation-by-mdeveaux/sssssw6f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-translation-by-mdeveaux/sssssw6f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-translation-by-mdeveaux/sssssw6f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-translation-by-mdeveaux/sssssw6f"/>
      <lastmod>2026-11-02T13:37:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-tailed-hypothesis-testing-mean-t-test/sssssw68</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-tailed-hypothesis-testing-mean-t-test/sssssw68"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-tailed-hypothesis-testing-mean-t-test/sssssw68"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-tailed-hypothesis-testing-mean-t-test/sssssw68"/>
      <lastmod>2026-11-02T09:27:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-tailed-hypothesis-testing-mean-t-test/sssssw68</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-tailed-hypothesis-testing-mean-t-test/sssssw68"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-tailed-hypothesis-testing-mean-t-test/sssssw68"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-tailed-hypothesis-testing-mean-t-test/sssssw68"/>
      <lastmod>2026-11-02T09:27:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-construction-by-kmuise-tewksbury-k12-ma-us/sssssw6u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-construction-by-kmuise-tewksbury-k12-ma-us/sssssw6u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-construction-by-kmuise-tewksbury-k12-ma-us/sssssw6u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-construction-by-kmuise-tewksbury-k12-ma-us/sssssw6u"/>
      <lastmod>2026-11-01T23:27:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-construction-by-kmuise-tewksbury-k12-ma-us/sssssw6u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-construction-by-kmuise-tewksbury-k12-ma-us/sssssw6u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-construction-by-kmuise-tewksbury-k12-ma-us/sssssw6u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-construction-by-kmuise-tewksbury-k12-ma-us/sssssw6u"/>
      <lastmod>2026-11-01T23:27:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivatives-as-limits/sssssw65</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivatives-as-limits/sssssw65"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivatives-as-limits/sssssw65"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivatives-as-limits/sssssw65"/>
      <lastmod>2026-11-02T09:41:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivatives-as-limits/sssssw65</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivatives-as-limits/sssssw65"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivatives-as-limits/sssssw65"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivatives-as-limits/sssssw65"/>
      <lastmod>2026-11-02T09:41:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fibonacci-golden-ratio/sssssw6b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fibonacci-golden-ratio/sssssw6b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fibonacci-golden-ratio/sssssw6b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fibonacci-golden-ratio/sssssw6b"/>
      <lastmod>2026-11-02T00:04:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fibonacci-golden-ratio/sssssw6b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fibonacci-golden-ratio/sssssw6b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fibonacci-golden-ratio/sssssw6b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fibonacci-golden-ratio/sssssw6b"/>
      <lastmod>2026-11-02T00:04:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polar-plot-from-cartesian-coordinates/sssssw63</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-plot-from-cartesian-coordinates/sssssw63"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-plot-from-cartesian-coordinates/sssssw63"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-plot-from-cartesian-coordinates/sssssw63"/>
      <lastmod>2026-11-02T02:36:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polar-plot-from-cartesian-coordinates/sssssw63</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polar-plot-from-cartesian-coordinates/sssssw63"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polar-plot-from-cartesian-coordinates/sssssw63"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polar-plot-from-cartesian-coordinates/sssssw63"/>
      <lastmod>2026-11-02T02:36:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-construction-and-integral-demonstration/sssssw6q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-construction-and-integral-demonstration/sssssw6q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-construction-and-integral-demonstration/sssssw6q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-construction-and-integral-demonstration/sssssw6q"/>
      <lastmod>2026-11-02T15:42:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-construction-and-integral-demonstration/sssssw6q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-construction-and-integral-demonstration/sssssw6q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-construction-and-integral-demonstration/sssssw6q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-construction-and-integral-demonstration/sssssw6q"/>
      <lastmod>2026-11-02T15:42:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-similar-right-triangles-with-multiple-side-lengths/sssssw61</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-similar-right-triangles-with-multiple-side-lengths/sssssw61"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-similar-right-triangles-with-multiple-side-lengths/sssssw61"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-similar-right-triangles-with-multiple-side-lengths/sssssw61"/>
      <lastmod>2026-11-02T17:55:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-similar-right-triangles-with-multiple-side-lengths/sssssw61</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-similar-right-triangles-with-multiple-side-lengths/sssssw61"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-similar-right-triangles-with-multiple-side-lengths/sssssw61"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-similar-right-triangles-with-multiple-side-lengths/sssssw61"/>
      <lastmod>2026-11-02T17:55:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/factoring-with-exponents/sssssw6m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factoring-with-exponents/sssssw6m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factoring-with-exponents/sssssw6m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factoring-with-exponents/sssssw6m"/>
      <lastmod>2026-11-02T16:44:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/factoring-with-exponents/sssssw6m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/factoring-with-exponents/sssssw6m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/factoring-with-exponents/sssssw6m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/factoring-with-exponents/sssssw6m"/>
      <lastmod>2026-11-02T16:44:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perimeter-vs-area-comparison/sssssw6j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-vs-area-comparison/sssssw6j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-vs-area-comparison/sssssw6j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-vs-area-comparison/sssssw6j"/>
      <lastmod>2026-11-02T18:40:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perimeter-vs-area-comparison/sssssw6j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-vs-area-comparison/sssssw6j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-vs-area-comparison/sssssw6j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-vs-area-comparison/sssssw6j"/>
      <lastmod>2026-11-02T18:40:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-exploration-by-jedi-algebron/sssssw6p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-exploration-by-jedi-algebron/sssssw6p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-exploration-by-jedi-algebron/sssssw6p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-exploration-by-jedi-algebron/sssssw6p"/>
      <lastmod>2026-11-02T15:36:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-exploration-by-jedi-algebron/sssssw6p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-exploration-by-jedi-algebron/sssssw6p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-exploration-by-jedi-algebron/sssssw6p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-exploration-by-jedi-algebron/sssssw6p"/>
      <lastmod>2026-11-02T15:36:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/radial-intensity-dispersion-and-ring-system/sssssw6w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/radial-intensity-dispersion-and-ring-system/sssssw6w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/radial-intensity-dispersion-and-ring-system/sssssw6w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/radial-intensity-dispersion-and-ring-system/sssssw6w"/>
      <lastmod>2026-11-01T21:36:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/radial-intensity-dispersion-and-ring-system/sssssw6w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/radial-intensity-dispersion-and-ring-system/sssssw6w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/radial-intensity-dispersion-and-ring-system/sssssw6w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/radial-intensity-dispersion-and-ring-system/sssssw6w"/>
      <lastmod>2026-11-01T21:36:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modulo-2-operation/sssssw66</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modulo-2-operation/sssssw66"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modulo-2-operation/sssssw66"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modulo-2-operation/sssssw66"/>
      <lastmod>2026-11-02T15:53:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modulo-2-operation/sssssw66</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modulo-2-operation/sssssw66"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modulo-2-operation/sssssw66"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modulo-2-operation/sssssw66"/>
      <lastmod>2026-11-02T15:53:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/histogram-ungrouped-data-exercise/sssssw6g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-ungrouped-data-exercise/sssssw6g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-ungrouped-data-exercise/sssssw6g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-ungrouped-data-exercise/sssssw6g"/>
      <lastmod>2026-11-01T23:14:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/histogram-ungrouped-data-exercise/sssssw6g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-ungrouped-data-exercise/sssssw6g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-ungrouped-data-exercise/sssssw6g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-ungrouped-data-exercise/sssssw6g"/>
      <lastmod>2026-11-01T23:14:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-demonstration-of-perpendiculars-in-a-cyclic-quadrilateral/sssssw69</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-perpendiculars-in-a-cyclic-quadrilateral/sssssw69"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-perpendiculars-in-a-cyclic-quadrilateral/sssssw69"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-perpendiculars-in-a-cyclic-quadrilateral/sssssw69"/>
      <lastmod>2026-11-02T17:01:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-demonstration-of-perpendiculars-in-a-cyclic-quadrilateral/sssssw69</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-perpendiculars-in-a-cyclic-quadrilateral/sssssw69"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-demonstration-of-perpendiculars-in-a-cyclic-quadrilateral/sssssw69"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-demonstration-of-perpendiculars-in-a-cyclic-quadrilateral/sssssw69"/>
      <lastmod>2026-11-02T17:01:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-volume-calculation-demo/sssssw6e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-volume-calculation-demo/sssssw6e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-volume-calculation-demo/sssssw6e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-volume-calculation-demo/sssssw6e"/>
      <lastmod>2026-11-01T23:55:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-volume-calculation-demo/sssssw6e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-volume-calculation-demo/sssssw6e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-volume-calculation-demo/sssssw6e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-volume-calculation-demo/sssssw6e"/>
      <lastmod>2026-11-01T23:55:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-intersection-demo/sssssw6v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-intersection-demo/sssssw6v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-intersection-demo/sssssw6v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-intersection-demo/sssssw6v"/>
      <lastmod>2026-11-01T21:19:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-intersection-demo/sssssw6v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-intersection-demo/sssssw6v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-intersection-demo/sssssw6v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-intersection-demo/sssssw6v"/>
      <lastmod>2026-11-01T21:19:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/jeener-s-klein-surface/sssssw64</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/jeener-s-klein-surface/sssssw64"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/jeener-s-klein-surface/sssssw64"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/jeener-s-klein-surface/sssssw64"/>
      <lastmod>2026-11-01T21:01:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/jeener-s-klein-surface/sssssw64</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/jeener-s-klein-surface/sssssw64"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/jeener-s-klein-surface/sssssw64"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/jeener-s-klein-surface/sssssw64"/>
      <lastmod>2026-11-01T21:01:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-programming-and-polygon-construction/sssssw6l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-programming-and-polygon-construction/sssssw6l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-programming-and-polygon-construction/sssssw6l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-programming-and-polygon-construction/sssssw6l"/>
      <lastmod>2026-11-01T21:09:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-programming-and-polygon-construction/sssssw6l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-programming-and-polygon-construction/sssssw6l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-programming-and-polygon-construction/sssssw6l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-programming-and-polygon-construction/sssssw6l"/>
      <lastmod>2026-11-01T21:09:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-construction-by-rlrobinso945/sssssw6y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-rlrobinso945/sssssw6y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-by-rlrobinso945/sssssw6y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-rlrobinso945/sssssw6y"/>
      <lastmod>2026-11-02T17:49:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-construction-by-rlrobinso945/sssssw6y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-rlrobinso945/sssssw6y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-construction-by-rlrobinso945/sssssw6y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-construction-by-rlrobinso945/sssssw6y"/>
      <lastmod>2026-11-02T17:49:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-dynamic-exploration-with-random-variables/sssssw6a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-dynamic-exploration-with-random-variables/sssssw6a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-dynamic-exploration-with-random-variables/sssssw6a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-dynamic-exploration-with-random-variables/sssssw6a"/>
      <lastmod>2026-11-01T23:52:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-dynamic-exploration-with-random-variables/sssssw6a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-dynamic-exploration-with-random-variables/sssssw6a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-dynamic-exploration-with-random-variables/sssssw6a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-dynamic-exploration-with-random-variables/sssssw6a"/>
      <lastmod>2026-11-01T23:52:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rainbow-rossler-attractor/sssssw6c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rainbow-rossler-attractor/sssssw6c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rainbow-rossler-attractor/sssssw6c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rainbow-rossler-attractor/sssssw6c"/>
      <lastmod>2026-11-02T17:39:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rainbow-rossler-attractor/sssssw6c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rainbow-rossler-attractor/sssssw6c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rainbow-rossler-attractor/sssssw6c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rainbow-rossler-attractor/sssssw6c"/>
      <lastmod>2026-11-02T17:39:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spherical-coordinates-by-pedro-morales-almazan/sssssw6r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-coordinates-by-pedro-morales-almazan/sssssw6r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-coordinates-by-pedro-morales-almazan/sssssw6r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-coordinates-by-pedro-morales-almazan/sssssw6r"/>
      <lastmod>2026-11-01T23:13:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spherical-coordinates-by-pedro-morales-almazan/sssssw6r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spherical-coordinates-by-pedro-morales-almazan/sssssw6r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spherical-coordinates-by-pedro-morales-almazan/sssssw6r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spherical-coordinates-by-pedro-morales-almazan/sssssw6r"/>
      <lastmod>2026-11-01T23:13:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tick-boxes-union-and-intersection-by-jason-murphy/sssssw6h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tick-boxes-union-and-intersection-by-jason-murphy/sssssw6h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tick-boxes-union-and-intersection-by-jason-murphy/sssssw6h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tick-boxes-union-and-intersection-by-jason-murphy/sssssw6h"/>
      <lastmod>2026-11-02T00:44:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tick-boxes-union-and-intersection-by-jason-murphy/sssssw6h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tick-boxes-union-and-intersection-by-jason-murphy/sssssw6h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tick-boxes-union-and-intersection-by-jason-murphy/sssssw6h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tick-boxes-union-and-intersection-by-jason-murphy/sssssw6h"/>
      <lastmod>2026-11-02T00:44:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangular-prism-by-helen-bates/sssssw6t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-prism-by-helen-bates/sssssw6t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-prism-by-helen-bates/sssssw6t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-prism-by-helen-bates/sssssw6t"/>
      <lastmod>2026-11-02T13:27:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangular-prism-by-helen-bates/sssssw6t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-prism-by-helen-bates/sssssw6t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-prism-by-helen-bates/sssssw6t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-prism-by-helen-bates/sssssw6t"/>
      <lastmod>2026-11-02T13:27:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sample-visualization-and-impact-of-mean-std-deviation/sssssw6x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sample-visualization-and-impact-of-mean-std-deviation/sssssw6x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sample-visualization-and-impact-of-mean-std-deviation/sssssw6x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sample-visualization-and-impact-of-mean-std-deviation/sssssw6x"/>
      <lastmod>2026-11-02T02:25:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sample-visualization-and-impact-of-mean-std-deviation/sssssw6x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sample-visualization-and-impact-of-mean-std-deviation/sssssw6x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sample-visualization-and-impact-of-mean-std-deviation/sssssw6x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sample-visualization-and-impact-of-mean-std-deviation/sssssw6x"/>
      <lastmod>2026-11-02T02:25:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circular-motion-and-differentiation-of-trig-functions/sssssw6i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circular-motion-and-differentiation-of-trig-functions/sssssw6i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circular-motion-and-differentiation-of-trig-functions/sssssw6i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circular-motion-and-differentiation-of-trig-functions/sssssw6i"/>
      <lastmod>2026-11-02T16:34:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circular-motion-and-differentiation-of-trig-functions/sssssw6i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circular-motion-and-differentiation-of-trig-functions/sssssw6i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circular-motion-and-differentiation-of-trig-functions/sssssw6i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circular-motion-and-differentiation-of-trig-functions/sssssw6i"/>
      <lastmod>2026-11-02T16:34:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-drawn-from-definition/sssssw6o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-drawn-from-definition/sssssw6o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-drawn-from-definition/sssssw6o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-drawn-from-definition/sssssw6o"/>
      <lastmod>2026-11-02T09:30:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-drawn-from-definition/sssssw6o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-drawn-from-definition/sssssw6o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-drawn-from-definition/sssssw6o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-drawn-from-definition/sssssw6o"/>
      <lastmod>2026-11-02T09:30:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/bdd-volume-of-pyramid-approximation-by-layers/ssssswgs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bdd-volume-of-pyramid-approximation-by-layers/ssssswgs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bdd-volume-of-pyramid-approximation-by-layers/ssssswgs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bdd-volume-of-pyramid-approximation-by-layers/ssssswgs"/>
      <lastmod>2026-11-02T17:03:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/bdd-volume-of-pyramid-approximation-by-layers/ssssswgs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/bdd-volume-of-pyramid-approximation-by-layers/ssssswgs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/bdd-volume-of-pyramid-approximation-by-layers/ssssswgs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/bdd-volume-of-pyramid-approximation-by-layers/ssssswgs"/>
      <lastmod>2026-11-02T17:03:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/equations-of-circles-standard-form/ssssswg7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equations-of-circles-standard-form/ssssswg7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equations-of-circles-standard-form/ssssswg7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equations-of-circles-standard-form/ssssswg7"/>
      <lastmod>2026-11-02T14:58:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/equations-of-circles-standard-form/ssssswg7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/equations-of-circles-standard-form/ssssswg7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/equations-of-circles-standard-form/ssssswg7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/equations-of-circles-standard-form/ssssswg7"/>
      <lastmod>2026-11-02T14:58:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-area-demonstration-by-craig-mackey/ssssswgn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-area-demonstration-by-craig-mackey/ssssswgn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-area-demonstration-by-craig-mackey/ssssswgn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-area-demonstration-by-craig-mackey/ssssswgn"/>
      <lastmod>2026-11-01T19:09:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-area-demonstration-by-craig-mackey/ssssswgn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-area-demonstration-by-craig-mackey/ssssswgn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-area-demonstration-by-craig-mackey/ssssswgn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-area-demonstration-by-craig-mackey/ssssswgn"/>
      <lastmod>2026-11-01T19:09:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-surfaces-of-revolution-by-irina-boyadzhiev/ssssswg2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-surfaces-of-revolution-by-irina-boyadzhiev/ssssswg2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-surfaces-of-revolution-by-irina-boyadzhiev/ssssswg2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-surfaces-of-revolution-by-irina-boyadzhiev/ssssswg2"/>
      <lastmod>2026-11-02T18:37:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-surfaces-of-revolution-by-irina-boyadzhiev/ssssswg2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-surfaces-of-revolution-by-irina-boyadzhiev/ssssswg2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-surfaces-of-revolution-by-irina-boyadzhiev/ssssswg2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-surfaces-of-revolution-by-irina-boyadzhiev/ssssswg2"/>
      <lastmod>2026-11-02T18:37:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/how-magnitude-of-cross-product-changes-with-angle/ssssswgk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-magnitude-of-cross-product-changes-with-angle/ssssswgk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-magnitude-of-cross-product-changes-with-angle/ssssswgk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-magnitude-of-cross-product-changes-with-angle/ssssswgk"/>
      <lastmod>2026-11-02T18:54:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/how-magnitude-of-cross-product-changes-with-angle/ssssswgk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-magnitude-of-cross-product-changes-with-angle/ssssswgk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-magnitude-of-cross-product-changes-with-angle/ssssswgk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-magnitude-of-cross-product-changes-with-angle/ssssswgk"/>
      <lastmod>2026-11-02T18:54:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-interior-angles-exploration/ssssswgz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-interior-angles-exploration/ssssswgz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-interior-angles-exploration/ssssswgz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-interior-angles-exploration/ssssswgz"/>
      <lastmod>2026-11-02T00:43:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-interior-angles-exploration/ssssswgz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-interior-angles-exploration/ssssswgz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-interior-angles-exploration/ssssswgz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-interior-angles-exploration/ssssswgz"/>
      <lastmod>2026-11-02T00:43:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/statistical-calculator/ssssswg0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/statistical-calculator/ssssswg0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/statistical-calculator/ssssswg0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/statistical-calculator/ssssswg0"/>
      <lastmod>2026-11-02T16:57:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/statistical-calculator/ssssswg0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/statistical-calculator/ssssswg0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/statistical-calculator/ssssswg0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/statistical-calculator/ssssswg0"/>
      <lastmod>2026-11-02T16:57:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-number-conditions-in-right-triangles/ssssswgd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-number-conditions-in-right-triangles/ssssswgd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-number-conditions-in-right-triangles/ssssswgd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-number-conditions-in-right-triangles/ssssswgd"/>
      <lastmod>2026-11-01T22:04:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-number-conditions-in-right-triangles/ssssswgd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-number-conditions-in-right-triangles/ssssswgd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-number-conditions-in-right-triangles/ssssswgd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-number-conditions-in-right-triangles/ssssswgd"/>
      <lastmod>2026-11-01T22:04:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometry-remediation-task-geometric-construction/ssssswgf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometry-remediation-task-geometric-construction/ssssswgf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometry-remediation-task-geometric-construction/ssssswgf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometry-remediation-task-geometric-construction/ssssswgf"/>
      <lastmod>2026-11-01T20:52:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometry-remediation-task-geometric-construction/ssssswgf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometry-remediation-task-geometric-construction/ssssswgf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometry-remediation-task-geometric-construction/ssssswgf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometry-remediation-task-geometric-construction/ssssswgf"/>
      <lastmod>2026-11-01T20:52:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/concentrated-forces-shear-and-bending-moment-diagrams/ssssswg8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/concentrated-forces-shear-and-bending-moment-diagrams/ssssswg8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/concentrated-forces-shear-and-bending-moment-diagrams/ssssswg8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/concentrated-forces-shear-and-bending-moment-diagrams/ssssswg8"/>
      <lastmod>2026-11-01T21:53:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/concentrated-forces-shear-and-bending-moment-diagrams/ssssswg8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/concentrated-forces-shear-and-bending-moment-diagrams/ssssswg8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/concentrated-forces-shear-and-bending-moment-diagrams/ssssswg8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/concentrated-forces-shear-and-bending-moment-diagrams/ssssswg8"/>
      <lastmod>2026-11-01T21:53:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/research-on-linear-function/ssssswgu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/research-on-linear-function/ssssswgu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/research-on-linear-function/ssssswgu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/research-on-linear-function/ssssswgu"/>
      <lastmod>2026-11-02T13:42:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/research-on-linear-function/ssssswgu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/research-on-linear-function/ssssswgu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/research-on-linear-function/ssssswgu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/research-on-linear-function/ssssswgu"/>
      <lastmod>2026-11-02T13:42:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practice-opposite-sides-of-triangles/ssssswg5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-opposite-sides-of-triangles/ssssswg5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-opposite-sides-of-triangles/ssssswg5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-opposite-sides-of-triangles/ssssswg5"/>
      <lastmod>2026-11-02T13:16:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practice-opposite-sides-of-triangles/ssssswg5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-opposite-sides-of-triangles/ssssswg5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-opposite-sides-of-triangles/ssssswg5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-opposite-sides-of-triangles/ssssswg5"/>
      <lastmod>2026-11-02T13:16:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-parallelograms-and-pyramids/ssssswgb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-parallelograms-and-pyramids/ssssswgb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-parallelograms-and-pyramids/ssssswgb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-parallelograms-and-pyramids/ssssswgb"/>
      <lastmod>2026-11-02T16:39:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-parallelograms-and-pyramids/ssssswgb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-parallelograms-and-pyramids/ssssswgb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-parallelograms-and-pyramids/ssssswgb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-parallelograms-and-pyramids/ssssswgb"/>
      <lastmod>2026-11-02T16:39:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/identify-rotation-information/ssssswg3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identify-rotation-information/ssssswg3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identify-rotation-information/ssssswg3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identify-rotation-information/ssssswg3"/>
      <lastmod>2026-11-02T12:24:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/identify-rotation-information/ssssswg3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identify-rotation-information/ssssswg3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identify-rotation-information/ssssswg3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identify-rotation-information/ssssswg3"/>
      <lastmod>2026-11-02T12:24:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/checking-intersection-conditions-for-linear-equations/ssssswgq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/checking-intersection-conditions-for-linear-equations/ssssswgq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/checking-intersection-conditions-for-linear-equations/ssssswgq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/checking-intersection-conditions-for-linear-equations/ssssswgq"/>
      <lastmod>2026-11-02T11:44:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/checking-intersection-conditions-for-linear-equations/ssssswgq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/checking-intersection-conditions-for-linear-equations/ssssswgq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/checking-intersection-conditions-for-linear-equations/ssssswgq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/checking-intersection-conditions-for-linear-equations/ssssswgq"/>
      <lastmod>2026-11-02T11:44:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilation-with-negative-scale-factor/ssssswg1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-with-negative-scale-factor/ssssswg1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-with-negative-scale-factor/ssssswg1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-with-negative-scale-factor/ssssswg1"/>
      <lastmod>2026-11-02T00:35:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilation-with-negative-scale-factor/ssssswg1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-with-negative-scale-factor/ssssswg1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-with-negative-scale-factor/ssssswg1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-with-negative-scale-factor/ssssswg1"/>
      <lastmod>2026-11-02T00:35:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/negative-exponent-model/ssssswgm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/negative-exponent-model/ssssswgm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/negative-exponent-model/ssssswgm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/negative-exponent-model/ssssswgm"/>
      <lastmod>2026-11-02T06:47:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/negative-exponent-model/ssssswgm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/negative-exponent-model/ssssswgm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/negative-exponent-model/ssssswgm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/negative-exponent-model/ssssswgm"/>
      <lastmod>2026-11-02T06:47:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-cutting-demonstration-by/ssssswgj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-cutting-demonstration-by/ssssswgj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-cutting-demonstration-by/ssssswgj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-cutting-demonstration-by/ssssswgj"/>
      <lastmod>2026-11-02T02:38:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-cutting-demonstration-by/ssssswgj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-cutting-demonstration-by/ssssswgj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-cutting-demonstration-by/ssssswgj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-cutting-demonstration-by/ssssswgj"/>
      <lastmod>2026-11-02T02:38:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/centroid-of-two-shapes/ssssswgp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/centroid-of-two-shapes/ssssswgp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/centroid-of-two-shapes/ssssswgp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/centroid-of-two-shapes/ssssswgp"/>
      <lastmod>2026-11-01T21:42:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/centroid-of-two-shapes/ssssswgp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/centroid-of-two-shapes/ssssswgp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/centroid-of-two-shapes/ssssswgp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/centroid-of-two-shapes/ssssswgp"/>
      <lastmod>2026-11-01T21:42:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/eyeball/ssssswgw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eyeball/ssssswgw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eyeball/ssssswgw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eyeball/ssssswgw"/>
      <lastmod>2026-11-01T22:00:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/eyeball/ssssswgw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/eyeball/ssssswgw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/eyeball/ssssswgw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/eyeball/ssssswgw"/>
      <lastmod>2026-11-01T22:00:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-and-function-demonstration/ssssswg6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-and-function-demonstration/ssssswg6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-and-function-demonstration/ssssswg6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-and-function-demonstration/ssssswg6"/>
      <lastmod>2026-11-02T16:50:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-and-function-demonstration/ssssswg6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-and-function-demonstration/ssssswg6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-and-function-demonstration/ssssswg6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-and-function-demonstration/ssssswg6"/>
      <lastmod>2026-11-02T16:50:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unwrapping-a-cylinder-dynamic-and-modifiable-illustration/ssssswgg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unwrapping-a-cylinder-dynamic-and-modifiable-illustration/ssssswgg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unwrapping-a-cylinder-dynamic-and-modifiable-illustration/ssssswgg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unwrapping-a-cylinder-dynamic-and-modifiable-illustration/ssssswgg"/>
      <lastmod>2026-11-02T11:00:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unwrapping-a-cylinder-dynamic-and-modifiable-illustration/ssssswgg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unwrapping-a-cylinder-dynamic-and-modifiable-illustration/ssssswgg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unwrapping-a-cylinder-dynamic-and-modifiable-illustration/ssssswgg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unwrapping-a-cylinder-dynamic-and-modifiable-illustration/ssssswgg"/>
      <lastmod>2026-11-02T11:00:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/statistics-and-geometry-combined-demo/ssssswg9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/statistics-and-geometry-combined-demo/ssssswg9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/statistics-and-geometry-combined-demo/ssssswg9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/statistics-and-geometry-combined-demo/ssssswg9"/>
      <lastmod>2026-11-02T02:58:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/statistics-and-geometry-combined-demo/ssssswg9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/statistics-and-geometry-combined-demo/ssssswg9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/statistics-and-geometry-combined-demo/ssssswg9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/statistics-and-geometry-combined-demo/ssssswg9"/>
      <lastmod>2026-11-02T02:58:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-and-absolute-value-of-a-function-at-a-point/ssssswge</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-and-absolute-value-of-a-function-at-a-point/ssssswge"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-and-absolute-value-of-a-function-at-a-point/ssssswge"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-and-absolute-value-of-a-function-at-a-point/ssssswge"/>
      <lastmod>2026-11-02T14:59:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-and-absolute-value-of-a-function-at-a-point/ssssswge</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-and-absolute-value-of-a-function-at-a-point/ssssswge"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-and-absolute-value-of-a-function-at-a-point/ssssswge"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-and-absolute-value-of-a-function-at-a-point/ssssswge"/>
      <lastmod>2026-11-02T14:59:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/addition-of-fractions-with-the-same-denominator-by-anthony-or/ssssswgv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-of-fractions-with-the-same-denominator-by-anthony-or/ssssswgv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-of-fractions-with-the-same-denominator-by-anthony-or/ssssswgv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-of-fractions-with-the-same-denominator-by-anthony-or/ssssswgv"/>
      <lastmod>2026-11-02T03:13:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/addition-of-fractions-with-the-same-denominator-by-anthony-or/ssssswgv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/addition-of-fractions-with-the-same-denominator-by-anthony-or/ssssswgv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/addition-of-fractions-with-the-same-denominator-by-anthony-or/ssssswgv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/addition-of-fractions-with-the-same-denominator-by-anthony-or/ssssswgv"/>
      <lastmod>2026-11-02T03:13:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hypothesis-testing-limit-functions-demo/ssssswg4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hypothesis-testing-limit-functions-demo/ssssswg4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hypothesis-testing-limit-functions-demo/ssssswg4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hypothesis-testing-limit-functions-demo/ssssswg4"/>
      <lastmod>2026-11-02T16:46:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hypothesis-testing-limit-functions-demo/ssssswg4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hypothesis-testing-limit-functions-demo/ssssswg4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hypothesis-testing-limit-functions-demo/ssssswg4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hypothesis-testing-limit-functions-demo/ssssswg4"/>
      <lastmod>2026-11-02T16:46:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-sections-of-a-triangular-prism/ssssswgl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-sections-of-a-triangular-prism/ssssswgl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-sections-of-a-triangular-prism/ssssswgl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-sections-of-a-triangular-prism/ssssswgl"/>
      <lastmod>2026-11-01T23:19:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-sections-of-a-triangular-prism/ssssswgl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-sections-of-a-triangular-prism/ssssswgl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-sections-of-a-triangular-prism/ssssswgl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-sections-of-a-triangular-prism/ssssswgl"/>
      <lastmod>2026-11-01T23:19:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangle-investigation-5/ssssswgy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangle-investigation-5/ssssswgy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangle-investigation-5/ssssswgy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangle-investigation-5/ssssswgy"/>
      <lastmod>2026-11-01T21:08:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangle-investigation-5/ssssswgy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangle-investigation-5/ssssswgy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangle-investigation-5/ssssswgy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangle-investigation-5/ssssswgy"/>
      <lastmod>2026-11-01T21:08:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-pythagorean-theorem/ssssswga</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-pythagorean-theorem/ssssswga"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-pythagorean-theorem/ssssswga"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-pythagorean-theorem/ssssswga"/>
      <lastmod>2026-11-01T20:48:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-pythagorean-theorem/ssssswga</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-pythagorean-theorem/ssssswga"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-pythagorean-theorem/ssssswga"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-pythagorean-theorem/ssssswga"/>
      <lastmod>2026-11-01T20:48:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sections-of-cones-by-s-sharma/ssssswgc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-cones-by-s-sharma/ssssswgc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-cones-by-s-sharma/ssssswgc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-cones-by-s-sharma/ssssswgc"/>
      <lastmod>2026-11-01T22:01:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sections-of-cones-by-s-sharma/ssssswgc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-cones-by-s-sharma/ssssswgc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-cones-by-s-sharma/ssssswgc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-cones-by-s-sharma/ssssswgc"/>
      <lastmod>2026-11-01T22:01:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagoras-theorem-proof-i/ssssswgr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagoras-theorem-proof-i/ssssswgr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagoras-theorem-proof-i/ssssswgr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagoras-theorem-proof-i/ssssswgr"/>
      <lastmod>2026-11-01T21:25:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagoras-theorem-proof-i/ssssswgr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagoras-theorem-proof-i/ssssswgr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagoras-theorem-proof-i/ssssswgr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagoras-theorem-proof-i/ssssswgr"/>
      <lastmod>2026-11-01T21:25:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-wheels/ssssswgh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-wheels/ssssswgh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-wheels/ssssswgh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-wheels/ssssswgh"/>
      <lastmod>2026-11-01T23:33:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-wheels/ssssswgh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-wheels/ssssswgh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-wheels/ssssswgh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-wheels/ssssswgh"/>
      <lastmod>2026-11-01T23:33:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lagrange-multipliers/ssssswgt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lagrange-multipliers/ssssswgt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lagrange-multipliers/ssssswgt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lagrange-multipliers/ssssswgt"/>
      <lastmod>2026-11-01T21:08:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lagrange-multipliers/ssssswgt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lagrange-multipliers/ssssswgt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lagrange-multipliers/ssssswgt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lagrange-multipliers/ssssswgt"/>
      <lastmod>2026-11-01T21:08:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/histogram-3/ssssswgx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-3/ssssswgx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-3/ssssswgx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-3/ssssswgx"/>
      <lastmod>2026-11-02T17:01:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/histogram-3/ssssswgx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/histogram-3/ssssswgx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/histogram-3/ssssswgx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/histogram-3/ssssswgx"/>
      <lastmod>2026-11-02T17:01:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/venn-diagram-overlap-demonstration/ssssswgi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-overlap-demonstration/ssssswgi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-overlap-demonstration/ssssswgi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-overlap-demonstration/ssssswgi"/>
      <lastmod>2026-11-01T20:44:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/venn-diagram-overlap-demonstration/ssssswgi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-overlap-demonstration/ssssswgi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-overlap-demonstration/ssssswgi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-overlap-demonstration/ssssswgi"/>
      <lastmod>2026-11-01T20:44:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/is-ssa-congruent/ssssswgo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/is-ssa-congruent/ssssswgo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/is-ssa-congruent/ssssswgo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/is-ssa-congruent/ssssswgo"/>
      <lastmod>2026-11-01T21:46:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/is-ssa-congruent/ssssswgo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/is-ssa-congruent/ssssswgo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/is-ssa-congruent/ssssswgo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/is-ssa-congruent/ssssswgo"/>
      <lastmod>2026-11-01T21:46:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometry-construction-how-many-groups-part-1/sssssw9s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometry-construction-how-many-groups-part-1/sssssw9s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometry-construction-how-many-groups-part-1/sssssw9s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometry-construction-how-many-groups-part-1/sssssw9s"/>
      <lastmod>2026-11-01T20:36:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometry-construction-how-many-groups-part-1/sssssw9s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometry-construction-how-many-groups-part-1/sssssw9s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometry-construction-how-many-groups-part-1/sssssw9s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometry-construction-how-many-groups-part-1/sssssw9s"/>
      <lastmod>2026-11-01T20:36:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-surfaces-and-their-cross-sections/sssssw97</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-surfaces-and-their-cross-sections/sssssw97"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-surfaces-and-their-cross-sections/sssssw97"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-surfaces-and-their-cross-sections/sssssw97"/>
      <lastmod>2026-11-02T12:24:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-surfaces-and-their-cross-sections/sssssw97</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-surfaces-and-their-cross-sections/sssssw97"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-surfaces-and-their-cross-sections/sssssw97"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-surfaces-and-their-cross-sections/sssssw97"/>
      <lastmod>2026-11-02T12:24:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-american-airlines-logo/sssssw9n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-american-airlines-logo/sssssw9n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-american-airlines-logo/sssssw9n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-american-airlines-logo/sssssw9n"/>
      <lastmod>2026-11-01T21:03:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-american-airlines-logo/sssssw9n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-american-airlines-logo/sssssw9n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-american-airlines-logo/sssssw9n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-american-airlines-logo/sssssw9n"/>
      <lastmod>2026-11-01T21:03:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-comparer/sssssw92</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-comparer/sssssw92"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-comparer/sssssw92"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-comparer/sssssw92"/>
      <lastmod>2026-11-02T15:29:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-comparer/sssssw92</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-comparer/sssssw92"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-comparer/sssssw92"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-comparer/sssssw92"/>
      <lastmod>2026-11-02T15:29:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/creating-a-custom-tool/sssssw9k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/creating-a-custom-tool/sssssw9k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/creating-a-custom-tool/sssssw9k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/creating-a-custom-tool/sssssw9k"/>
      <lastmod>2026-11-01T23:24:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/creating-a-custom-tool/sssssw9k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/creating-a-custom-tool/sssssw9k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/creating-a-custom-tool/sssssw9k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/creating-a-custom-tool/sssssw9k"/>
      <lastmod>2026-11-01T23:24:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-and-perimeter-calculation/sssssw9z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-and-perimeter-calculation/sssssw9z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-and-perimeter-calculation/sssssw9z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-and-perimeter-calculation/sssssw9z"/>
      <lastmod>2026-11-02T18:18:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-and-perimeter-calculation/sssssw9z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-and-perimeter-calculation/sssssw9z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-and-perimeter-calculation/sssssw9z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-and-perimeter-calculation/sssssw9z"/>
      <lastmod>2026-11-02T18:18:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/house-model/sssssw90</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/house-model/sssssw90"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/house-model/sssssw90"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/house-model/sssssw90"/>
      <lastmod>2026-11-02T14:53:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/house-model/sssssw90</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/house-model/sssssw90"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/house-model/sssssw90"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/house-model/sssssw90"/>
      <lastmod>2026-11-02T14:53:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometry-as-ratios/sssssw9d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometry-as-ratios/sssssw9d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometry-as-ratios/sssssw9d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometry-as-ratios/sssssw9d"/>
      <lastmod>2026-11-02T12:44:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometry-as-ratios/sssssw9d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometry-as-ratios/sssssw9d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometry-as-ratios/sssssw9d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometry-as-ratios/sssssw9d"/>
      <lastmod>2026-11-02T12:44:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometry-unit-circle-10-degree-increments/sssssw9f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometry-unit-circle-10-degree-increments/sssssw9f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometry-unit-circle-10-degree-increments/sssssw9f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometry-unit-circle-10-degree-increments/sssssw9f"/>
      <lastmod>2026-11-02T09:34:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometry-unit-circle-10-degree-increments/sssssw9f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometry-unit-circle-10-degree-increments/sssssw9f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometry-unit-circle-10-degree-increments/sssssw9f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometry-unit-circle-10-degree-increments/sssssw9f"/>
      <lastmod>2026-11-02T09:34:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intro-to-area-estimate-quiz/sssssw98</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intro-to-area-estimate-quiz/sssssw98"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intro-to-area-estimate-quiz/sssssw98"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intro-to-area-estimate-quiz/sssssw98"/>
      <lastmod>2026-11-01T21:24:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intro-to-area-estimate-quiz/sssssw98</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intro-to-area-estimate-quiz/sssssw98"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intro-to-area-estimate-quiz/sssssw98"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intro-to-area-estimate-quiz/sssssw98"/>
      <lastmod>2026-11-01T21:24:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/varignon-3d-action-revamped/sssssw9u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/varignon-3d-action-revamped/sssssw9u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/varignon-3d-action-revamped/sssssw9u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/varignon-3d-action-revamped/sssssw9u"/>
      <lastmod>2026-11-02T00:23:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/varignon-3d-action-revamped/sssssw9u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/varignon-3d-action-revamped/sssssw9u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/varignon-3d-action-revamped/sssssw9u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/varignon-3d-action-revamped/sssssw9u"/>
      <lastmod>2026-11-02T00:23:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-parts-demonstration-by-ren-ta-v-gov-3/sssssw95</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-parts-demonstration-by-ren-ta-v-gov-3/sssssw95"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-parts-demonstration-by-ren-ta-v-gov-3/sssssw95"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-parts-demonstration-by-ren-ta-v-gov-3/sssssw95"/>
      <lastmod>2026-11-01T23:27:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-parts-demonstration-by-ren-ta-v-gov-3/sssssw95</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-parts-demonstration-by-ren-ta-v-gov-3/sssssw95"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-parts-demonstration-by-ren-ta-v-gov-3/sssssw95"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-parts-demonstration-by-ren-ta-v-gov-3/sssssw95"/>
      <lastmod>2026-11-01T23:27:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/amatteson-rhombus/sssssw9b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/amatteson-rhombus/sssssw9b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/amatteson-rhombus/sssssw9b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/amatteson-rhombus/sssssw9b"/>
      <lastmod>2026-11-02T16:49:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/amatteson-rhombus/sssssw9b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/amatteson-rhombus/sssssw9b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/amatteson-rhombus/sssssw9b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/amatteson-rhombus/sssssw9b"/>
      <lastmod>2026-11-02T16:49:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-and-path-by-forktourney/sssssw93</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-and-path-by-forktourney/sssssw93"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-and-path-by-forktourney/sssssw93"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-and-path-by-forktourney/sssssw93"/>
      <lastmod>2026-11-02T18:53:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-and-path-by-forktourney/sssssw93</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-and-path-by-forktourney/sssssw93"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-and-path-by-forktourney/sssssw93"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-and-path-by-forktourney/sssssw93"/>
      <lastmod>2026-11-02T18:53:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-graphs-inequalities-demo/sssssw9q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-graphs-inequalities-demo/sssssw9q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-graphs-inequalities-demo/sssssw9q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-graphs-inequalities-demo/sssssw9q"/>
      <lastmod>2026-11-02T00:51:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-graphs-inequalities-demo/sssssw9q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-graphs-inequalities-demo/sssssw9q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-graphs-inequalities-demo/sssssw9q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-graphs-inequalities-demo/sssssw9q"/>
      <lastmod>2026-11-02T00:51:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-geometry-and-optimization-example/sssssw91</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-geometry-and-optimization-example/sssssw91"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-geometry-and-optimization-example/sssssw91"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-geometry-and-optimization-example/sssssw91"/>
      <lastmod>2026-11-02T00:56:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-geometry-and-optimization-example/sssssw91</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-geometry-and-optimization-example/sssssw91"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-geometry-and-optimization-example/sssssw91"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-geometry-and-optimization-example/sssssw91"/>
      <lastmod>2026-11-02T00:56:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-nathan-van-nuys/sssssw9m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-nathan-van-nuys/sssssw9m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-nathan-van-nuys/sssssw9m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-nathan-van-nuys/sssssw9m"/>
      <lastmod>2026-11-02T16:49:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-nathan-van-nuys/sssssw9m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-nathan-van-nuys/sssssw9m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-demo-by-nathan-van-nuys/sssssw9m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-demo-by-nathan-van-nuys/sssssw9m"/>
      <lastmod>2026-11-02T16:49:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-based-pyramid-by-helen-bates/sssssw9j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-based-pyramid-by-helen-bates/sssssw9j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-based-pyramid-by-helen-bates/sssssw9j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-based-pyramid-by-helen-bates/sssssw9j"/>
      <lastmod>2026-11-02T18:33:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-based-pyramid-by-helen-bates/sssssw9j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-based-pyramid-by-helen-bates/sssssw9j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-based-pyramid-by-helen-bates/sssssw9j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-based-pyramid-by-helen-bates/sssssw9j"/>
      <lastmod>2026-11-02T18:33:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construct-perpendicular-line-through-a-point-not-on-the-line/sssssw9p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-perpendicular-line-through-a-point-not-on-the-line/sssssw9p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-perpendicular-line-through-a-point-not-on-the-line/sssssw9p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-perpendicular-line-through-a-point-not-on-the-line/sssssw9p"/>
      <lastmod>2026-11-02T02:18:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construct-perpendicular-line-through-a-point-not-on-the-line/sssssw9p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-perpendicular-line-through-a-point-not-on-the-line/sssssw9p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-perpendicular-line-through-a-point-not-on-the-line/sssssw9p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-perpendicular-line-through-a-point-not-on-the-line/sssssw9p"/>
      <lastmod>2026-11-02T02:18:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dependence-of-average-distance-on-truncation-parameter-in-truncated-square-antip/sssssw9w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dependence-of-average-distance-on-truncation-parameter-in-truncated-square-antip/sssssw9w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dependence-of-average-distance-on-truncation-parameter-in-truncated-square-antip/sssssw9w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dependence-of-average-distance-on-truncation-parameter-in-truncated-square-antip/sssssw9w"/>
      <lastmod>2026-11-01T19:36:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dependence-of-average-distance-on-truncation-parameter-in-truncated-square-antip/sssssw9w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dependence-of-average-distance-on-truncation-parameter-in-truncated-square-antip/sssssw9w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dependence-of-average-distance-on-truncation-parameter-in-truncated-square-antip/sssssw9w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dependence-of-average-distance-on-truncation-parameter-in-truncated-square-antip/sssssw9w"/>
      <lastmod>2026-11-01T19:36:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shadow-of-a-sphere-by-tatsuyoshi-hamada/sssssw96</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shadow-of-a-sphere-by-tatsuyoshi-hamada/sssssw96"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shadow-of-a-sphere-by-tatsuyoshi-hamada/sssssw96"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shadow-of-a-sphere-by-tatsuyoshi-hamada/sssssw96"/>
      <lastmod>2026-11-02T18:57:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shadow-of-a-sphere-by-tatsuyoshi-hamada/sssssw96</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shadow-of-a-sphere-by-tatsuyoshi-hamada/sssssw96"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shadow-of-a-sphere-by-tatsuyoshi-hamada/sssssw96"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shadow-of-a-sphere-by-tatsuyoshi-hamada/sssssw96"/>
      <lastmod>2026-11-02T18:57:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/projectile-motion-of-a-rocket-using-parametric-equations/sssssw9g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/projectile-motion-of-a-rocket-using-parametric-equations/sssssw9g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/projectile-motion-of-a-rocket-using-parametric-equations/sssssw9g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/projectile-motion-of-a-rocket-using-parametric-equations/sssssw9g"/>
      <lastmod>2026-11-02T18:27:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/projectile-motion-of-a-rocket-using-parametric-equations/sssssw9g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/projectile-motion-of-a-rocket-using-parametric-equations/sssssw9g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/projectile-motion-of-a-rocket-using-parametric-equations/sssssw9g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/projectile-motion-of-a-rocket-using-parametric-equations/sssssw9g"/>
      <lastmod>2026-11-02T18:27:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fractions-and-percentages-interactive-visualization/sssssw99</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-and-percentages-interactive-visualization/sssssw99"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-and-percentages-interactive-visualization/sssssw99"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-and-percentages-interactive-visualization/sssssw99"/>
      <lastmod>2026-11-02T00:09:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fractions-and-percentages-interactive-visualization/sssssw99</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fractions-and-percentages-interactive-visualization/sssssw99"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fractions-and-percentages-interactive-visualization/sssssw99"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fractions-and-percentages-interactive-visualization/sssssw99"/>
      <lastmod>2026-11-02T00:09:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/singapore-s-2012-tax-rate-for-varying-chargeable-income/sssssw9e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/singapore-s-2012-tax-rate-for-varying-chargeable-income/sssssw9e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/singapore-s-2012-tax-rate-for-varying-chargeable-income/sssssw9e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/singapore-s-2012-tax-rate-for-varying-chargeable-income/sssssw9e"/>
      <lastmod>2026-11-02T09:28:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/singapore-s-2012-tax-rate-for-varying-chargeable-income/sssssw9e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/singapore-s-2012-tax-rate-for-varying-chargeable-income/sssssw9e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/singapore-s-2012-tax-rate-for-varying-chargeable-income/sssssw9e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/singapore-s-2012-tax-rate-for-varying-chargeable-income/sssssw9e"/>
      <lastmod>2026-11-02T09:28:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hypergeometric-distribution-probability-calculation/sssssw9v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hypergeometric-distribution-probability-calculation/sssssw9v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hypergeometric-distribution-probability-calculation/sssssw9v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hypergeometric-distribution-probability-calculation/sssssw9v"/>
      <lastmod>2026-11-01T23:24:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hypergeometric-distribution-probability-calculation/sssssw9v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hypergeometric-distribution-probability-calculation/sssssw9v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hypergeometric-distribution-probability-calculation/sssssw9v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hypergeometric-distribution-probability-calculation/sssssw9v"/>
      <lastmod>2026-11-01T23:24:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intuitive-derivative-graphing-exercise-revamped/sssssw94</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intuitive-derivative-graphing-exercise-revamped/sssssw94"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intuitive-derivative-graphing-exercise-revamped/sssssw94"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intuitive-derivative-graphing-exercise-revamped/sssssw94"/>
      <lastmod>2026-11-02T13:30:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intuitive-derivative-graphing-exercise-revamped/sssssw94</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intuitive-derivative-graphing-exercise-revamped/sssssw94"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intuitive-derivative-graphing-exercise-revamped/sssssw94"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intuitive-derivative-graphing-exercise-revamped/sssssw94"/>
      <lastmod>2026-11-02T13:30:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kangaroo-2004/sssssw9l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kangaroo-2004/sssssw9l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kangaroo-2004/sssssw9l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kangaroo-2004/sssssw9l"/>
      <lastmod>2026-11-01T19:25:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kangaroo-2004/sssssw9l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kangaroo-2004/sssssw9l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kangaroo-2004/sssssw9l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kangaroo-2004/sssssw9l"/>
      <lastmod>2026-11-01T19:25:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-of-quadrilateral-wxyz-135-ccw-about-s/sssssw9y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-of-quadrilateral-wxyz-135-ccw-about-s/sssssw9y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-of-quadrilateral-wxyz-135-ccw-about-s/sssssw9y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-of-quadrilateral-wxyz-135-ccw-about-s/sssssw9y"/>
      <lastmod>2026-11-02T18:47:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-of-quadrilateral-wxyz-135-ccw-about-s/sssssw9y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-of-quadrilateral-wxyz-135-ccw-about-s/sssssw9y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-of-quadrilateral-wxyz-135-ccw-about-s/sssssw9y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-of-quadrilateral-wxyz-135-ccw-about-s/sssssw9y"/>
      <lastmod>2026-11-02T18:47:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/concave-and-convex-mirror-reflection-and-image-formation-simulation/sssssw9a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/concave-and-convex-mirror-reflection-and-image-formation-simulation/sssssw9a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/concave-and-convex-mirror-reflection-and-image-formation-simulation/sssssw9a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/concave-and-convex-mirror-reflection-and-image-formation-simulation/sssssw9a"/>
      <lastmod>2026-11-01T21:14:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/concave-and-convex-mirror-reflection-and-image-formation-simulation/sssssw9a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/concave-and-convex-mirror-reflection-and-image-formation-simulation/sssssw9a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/concave-and-convex-mirror-reflection-and-image-formation-simulation/sssssw9a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/concave-and-convex-mirror-reflection-and-image-formation-simulation/sssssw9a"/>
      <lastmod>2026-11-01T21:14:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exterior-angles-of-polygon/sssssw9c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angles-of-polygon/sssssw9c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angles-of-polygon/sssssw9c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angles-of-polygon/sssssw9c"/>
      <lastmod>2026-11-02T17:51:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exterior-angles-of-polygon/sssssw9c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angles-of-polygon/sssssw9c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angles-of-polygon/sssssw9c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angles-of-polygon/sssssw9c"/>
      <lastmod>2026-11-02T17:51:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/horizontal-parabola-shifts/sssssw9r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-parabola-shifts/sssssw9r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-parabola-shifts/sssssw9r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-parabola-shifts/sssssw9r"/>
      <lastmod>2026-11-02T18:17:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/horizontal-parabola-shifts/sssssw9r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-parabola-shifts/sssssw9r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-parabola-shifts/sssssw9r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-parabola-shifts/sssssw9r"/>
      <lastmod>2026-11-02T18:17:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/systems-of-equations-in-3d/sssssw9h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/systems-of-equations-in-3d/sssssw9h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/systems-of-equations-in-3d/sssssw9h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/systems-of-equations-in-3d/sssssw9h"/>
      <lastmod>2026-11-01T23:40:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/systems-of-equations-in-3d/sssssw9h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/systems-of-equations-in-3d/sssssw9h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/systems-of-equations-in-3d/sssssw9h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/systems-of-equations-in-3d/sssssw9h"/>
      <lastmod>2026-11-01T23:40:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-famous-five-right-triangles/sssssw9t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-famous-five-right-triangles/sssssw9t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-famous-five-right-triangles/sssssw9t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-famous-five-right-triangles/sssssw9t"/>
      <lastmod>2026-11-02T17:34:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-famous-five-right-triangles/sssssw9t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-famous-five-right-triangles/sssssw9t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-famous-five-right-triangles/sssssw9t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-famous-five-right-triangles/sssssw9t"/>
      <lastmod>2026-11-02T17:34:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-demo-of-linear-functions-and-derivatives/sssssw9x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demo-of-linear-functions-and-derivatives/sssssw9x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demo-of-linear-functions-and-derivatives/sssssw9x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demo-of-linear-functions-and-derivatives/sssssw9x"/>
      <lastmod>2026-11-01T20:50:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-demo-of-linear-functions-and-derivatives/sssssw9x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demo-of-linear-functions-and-derivatives/sssssw9x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demo-of-linear-functions-and-derivatives/sssssw9x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demo-of-linear-functions-and-derivatives/sssssw9x"/>
      <lastmod>2026-11-01T20:50:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comprehensive-interactive-exercise-on-geometric-transformations-and-conic-sectio/sssssw9i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comprehensive-interactive-exercise-on-geometric-transformations-and-conic-sectio/sssssw9i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comprehensive-interactive-exercise-on-geometric-transformations-and-conic-sectio/sssssw9i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comprehensive-interactive-exercise-on-geometric-transformations-and-conic-sectio/sssssw9i"/>
      <lastmod>2026-11-02T18:05:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comprehensive-interactive-exercise-on-geometric-transformations-and-conic-sectio/sssssw9i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comprehensive-interactive-exercise-on-geometric-transformations-and-conic-sectio/sssssw9i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comprehensive-interactive-exercise-on-geometric-transformations-and-conic-sectio/sssssw9i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comprehensive-interactive-exercise-on-geometric-transformations-and-conic-sectio/sssssw9i"/>
      <lastmod>2026-11-02T18:05:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/islamic-geometric-pattern-with-10-4-polygons/sssssw9o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-geometric-pattern-with-10-4-polygons/sssssw9o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-geometric-pattern-with-10-4-polygons/sssssw9o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-geometric-pattern-with-10-4-polygons/sssssw9o"/>
      <lastmod>2026-11-01T21:03:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/islamic-geometric-pattern-with-10-4-polygons/sssssw9o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-geometric-pattern-with-10-4-polygons/sssssw9o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-geometric-pattern-with-10-4-polygons/sssssw9o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-geometric-pattern-with-10-4-polygons/sssssw9o"/>
      <lastmod>2026-11-01T21:03:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perimeter-of-square-and-rectangle/ssssswes</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-of-square-and-rectangle/ssssswes"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-of-square-and-rectangle/ssssswes"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-of-square-and-rectangle/ssssswes"/>
      <lastmod>2026-11-02T11:59:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perimeter-of-square-and-rectangle/ssssswes</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perimeter-of-square-and-rectangle/ssssswes"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perimeter-of-square-and-rectangle/ssssswes"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perimeter-of-square-and-rectangle/ssssswes"/>
      <lastmod>2026-11-02T11:59:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explore-equilateral-triangles/ssssswe7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-equilateral-triangles/ssssswe7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-equilateral-triangles/ssssswe7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-equilateral-triangles/ssssswe7"/>
      <lastmod>2026-11-01T23:08:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explore-equilateral-triangles/ssssswe7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explore-equilateral-triangles/ssssswe7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explore-equilateral-triangles/ssssswe7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explore-equilateral-triangles/ssssswe7"/>
      <lastmod>2026-11-01T23:08:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-of-basic-shapes-parallelogram-trapezoid-and-quadratic-functions/ssssswen</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-basic-shapes-parallelogram-trapezoid-and-quadratic-functions/ssssswen"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-basic-shapes-parallelogram-trapezoid-and-quadratic-functions/ssssswen"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-basic-shapes-parallelogram-trapezoid-and-quadratic-functions/ssssswen"/>
      <lastmod>2026-11-02T18:33:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-of-basic-shapes-parallelogram-trapezoid-and-quadratic-functions/ssssswen</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-of-basic-shapes-parallelogram-trapezoid-and-quadratic-functions/ssssswen"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-of-basic-shapes-parallelogram-trapezoid-and-quadratic-functions/ssssswen"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-of-basic-shapes-parallelogram-trapezoid-and-quadratic-functions/ssssswen"/>
      <lastmod>2026-11-02T18:33:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/p1-group-vector-translation-and-similar-triangle-construction/ssssswe2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p1-group-vector-translation-and-similar-triangle-construction/ssssswe2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p1-group-vector-translation-and-similar-triangle-construction/ssssswe2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p1-group-vector-translation-and-similar-triangle-construction/ssssswe2"/>
      <lastmod>2026-11-02T18:45:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/p1-group-vector-translation-and-similar-triangle-construction/ssssswe2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p1-group-vector-translation-and-similar-triangle-construction/ssssswe2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p1-group-vector-translation-and-similar-triangle-construction/ssssswe2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p1-group-vector-translation-and-similar-triangle-construction/ssssswe2"/>
      <lastmod>2026-11-02T18:45:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-addition-demo-by-teri-dillard/ssssswek</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-demo-by-teri-dillard/ssssswek"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-demo-by-teri-dillard/ssssswek"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-demo-by-teri-dillard/ssssswek"/>
      <lastmod>2026-11-02T02:23:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-addition-demo-by-teri-dillard/ssssswek</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-demo-by-teri-dillard/ssssswek"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-demo-by-teri-dillard/ssssswek"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-demo-by-teri-dillard/ssssswek"/>
      <lastmod>2026-11-02T02:23:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vertex-form-quiz-with-various-a/ssssswez</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertex-form-quiz-with-various-a/ssssswez"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertex-form-quiz-with-various-a/ssssswez"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertex-form-quiz-with-various-a/ssssswez"/>
      <lastmod>2026-11-01T21:11:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vertex-form-quiz-with-various-a/ssssswez</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertex-form-quiz-with-various-a/ssssswez"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertex-form-quiz-with-various-a/ssssswez"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertex-form-quiz-with-various-a/ssssswez"/>
      <lastmod>2026-11-01T21:11:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comparing-and-equivalent-fractions/ssssswe0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-and-equivalent-fractions/ssssswe0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-and-equivalent-fractions/ssssswe0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-and-equivalent-fractions/ssssswe0"/>
      <lastmod>2026-11-01T19:25:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comparing-and-equivalent-fractions/ssssswe0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comparing-and-equivalent-fractions/ssssswe0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comparing-and-equivalent-fractions/ssssswe0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comparing-and-equivalent-fractions/ssssswe0"/>
      <lastmod>2026-11-01T19:25:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mr-geary-similar-triangles-demo/ssssswed</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mr-geary-similar-triangles-demo/ssssswed"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mr-geary-similar-triangles-demo/ssssswed"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mr-geary-similar-triangles-demo/ssssswed"/>
      <lastmod>2026-11-02T17:18:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mr-geary-similar-triangles-demo/ssssswed</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mr-geary-similar-triangles-demo/ssssswed"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mr-geary-similar-triangles-demo/ssssswed"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mr-geary-similar-triangles-demo/ssssswed"/>
      <lastmod>2026-11-02T17:18:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-construction-and-properties/ssssswef</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-construction-and-properties/ssssswef"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-construction-and-properties/ssssswef"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-construction-and-properties/ssssswef"/>
      <lastmod>2026-11-02T12:24:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-construction-and-properties/ssssswef</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-construction-and-properties/ssssswef"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-construction-and-properties/ssssswef"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-construction-and-properties/ssssswef"/>
      <lastmod>2026-11-02T12:24:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformations-exercise-2/ssssswe8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-exercise-2/ssssswe8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-exercise-2/ssssswe8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-exercise-2/ssssswe8"/>
      <lastmod>2026-11-02T12:43:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformations-exercise-2/ssssswe8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-exercise-2/ssssswe8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-exercise-2/ssssswe8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-exercise-2/ssssswe8"/>
      <lastmod>2026-11-02T12:43:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/overlap-of-two-symmetric-circles/sssssweu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/overlap-of-two-symmetric-circles/sssssweu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/overlap-of-two-symmetric-circles/sssssweu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/overlap-of-two-symmetric-circles/sssssweu"/>
      <lastmod>2026-11-01T21:50:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/overlap-of-two-symmetric-circles/sssssweu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/overlap-of-two-symmetric-circles/sssssweu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/overlap-of-two-symmetric-circles/sssssweu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/overlap-of-two-symmetric-circles/sssssweu"/>
      <lastmod>2026-11-01T21:50:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trefoil-knot/ssssswe5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trefoil-knot/ssssswe5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trefoil-knot/ssssswe5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trefoil-knot/ssssswe5"/>
      <lastmod>2026-11-02T10:43:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trefoil-knot/ssssswe5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trefoil-knot/ssssswe5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trefoil-knot/ssssswe5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trefoil-knot/ssssswe5"/>
      <lastmod>2026-11-02T10:43:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-cosine-and-the-unit-circle-by-andrew-jacobs/sssssweb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-cosine-and-the-unit-circle-by-andrew-jacobs/sssssweb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-cosine-and-the-unit-circle-by-andrew-jacobs/sssssweb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-cosine-and-the-unit-circle-by-andrew-jacobs/sssssweb"/>
      <lastmod>2026-11-02T13:14:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-cosine-and-the-unit-circle-by-andrew-jacobs/sssssweb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-cosine-and-the-unit-circle-by-andrew-jacobs/sssssweb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-cosine-and-the-unit-circle-by-andrew-jacobs/sssssweb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-cosine-and-the-unit-circle-by-andrew-jacobs/sssssweb"/>
      <lastmod>2026-11-02T13:14:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-ratios-interactive-demonstration/ssssswe3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-interactive-demonstration/ssssswe3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-interactive-demonstration/ssssswe3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-interactive-demonstration/ssssswe3"/>
      <lastmod>2026-11-02T18:11:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-ratios-interactive-demonstration/ssssswe3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-interactive-demonstration/ssssswe3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-interactive-demonstration/ssssswe3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-interactive-demonstration/ssssswe3"/>
      <lastmod>2026-11-02T18:11:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-transformations-parameter-driven-shifts-and-scaling/sssssweq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-transformations-parameter-driven-shifts-and-scaling/sssssweq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-transformations-parameter-driven-shifts-and-scaling/sssssweq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-transformations-parameter-driven-shifts-and-scaling/sssssweq"/>
      <lastmod>2026-11-02T17:44:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-transformations-parameter-driven-shifts-and-scaling/sssssweq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-transformations-parameter-driven-shifts-and-scaling/sssssweq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-transformations-parameter-driven-shifts-and-scaling/sssssweq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-transformations-parameter-driven-shifts-and-scaling/sssssweq"/>
      <lastmod>2026-11-02T17:44:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-multiplication-by-ian-cantley/ssssswe1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-by-ian-cantley/ssssswe1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-by-ian-cantley/ssssswe1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-by-ian-cantley/ssssswe1"/>
      <lastmod>2026-11-02T13:34:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-multiplication-by-ian-cantley/ssssswe1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-multiplication-by-ian-cantley/ssssswe1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-multiplication-by-ian-cantley/ssssswe1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-multiplication-by-ian-cantley/ssssswe1"/>
      <lastmod>2026-11-02T13:34:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/folding-test-lines-of-reflection-symmetry-by-ingrid-renneberg/ssssswem</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/folding-test-lines-of-reflection-symmetry-by-ingrid-renneberg/ssssswem"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/folding-test-lines-of-reflection-symmetry-by-ingrid-renneberg/ssssswem"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/folding-test-lines-of-reflection-symmetry-by-ingrid-renneberg/ssssswem"/>
      <lastmod>2026-11-01T21:19:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/folding-test-lines-of-reflection-symmetry-by-ingrid-renneberg/ssssswem</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/folding-test-lines-of-reflection-symmetry-by-ingrid-renneberg/ssssswem"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/folding-test-lines-of-reflection-symmetry-by-ingrid-renneberg/ssssswem"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/folding-test-lines-of-reflection-symmetry-by-ingrid-renneberg/ssssswem"/>
      <lastmod>2026-11-01T21:19:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/matrix-representation-of-a-rotation-in-3d/ssssswej</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-representation-of-a-rotation-in-3d/ssssswej"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-representation-of-a-rotation-in-3d/ssssswej"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-representation-of-a-rotation-in-3d/ssssswej"/>
      <lastmod>2026-11-01T20:38:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/matrix-representation-of-a-rotation-in-3d/ssssswej</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrix-representation-of-a-rotation-in-3d/ssssswej"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrix-representation-of-a-rotation-in-3d/ssssswej"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrix-representation-of-a-rotation-in-3d/ssssswej"/>
      <lastmod>2026-11-01T20:38:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-tangent-function-period-illustration/ssssswep</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-tangent-function-period-illustration/ssssswep"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-tangent-function-period-illustration/ssssswep"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-tangent-function-period-illustration/ssssswep"/>
      <lastmod>2026-11-02T17:13:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-tangent-function-period-illustration/ssssswep</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-tangent-function-period-illustration/ssssswep"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-tangent-function-period-illustration/ssssswep"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-tangent-function-period-illustration/ssssswep"/>
      <lastmod>2026-11-02T17:13:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/single-effect-stamping-press-mechanism/ssssswew</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/single-effect-stamping-press-mechanism/ssssswew"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/single-effect-stamping-press-mechanism/ssssswew"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/single-effect-stamping-press-mechanism/ssssswew"/>
      <lastmod>2026-11-01T19:02:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/single-effect-stamping-press-mechanism/ssssswew</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/single-effect-stamping-press-mechanism/ssssswew"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/single-effect-stamping-press-mechanism/ssssswew"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/single-effect-stamping-press-mechanism/ssssswew"/>
      <lastmod>2026-11-01T19:02:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-transformations-in-a-parallelogram/ssssswe6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-in-a-parallelogram/ssssswe6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-in-a-parallelogram/ssssswe6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-in-a-parallelogram/ssssswe6"/>
      <lastmod>2026-11-02T18:52:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-transformations-in-a-parallelogram/ssssswe6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-in-a-parallelogram/ssssswe6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-in-a-parallelogram/ssssswe6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-in-a-parallelogram/ssssswe6"/>
      <lastmod>2026-11-02T18:52:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-generated-mandala/sssssweg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-generated-mandala/sssssweg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-generated-mandala/sssssweg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-generated-mandala/sssssweg"/>
      <lastmod>2026-11-02T09:30:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-generated-mandala/sssssweg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-generated-mandala/sssssweg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-generated-mandala/sssssweg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-generated-mandala/sssssweg"/>
      <lastmod>2026-11-02T09:30:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/1-step-equations-with-fractions/ssssswe9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/1-step-equations-with-fractions/ssssswe9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/1-step-equations-with-fractions/ssssswe9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/1-step-equations-with-fractions/ssssswe9"/>
      <lastmod>2026-11-02T13:41:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/1-step-equations-with-fractions/ssssswe9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/1-step-equations-with-fractions/ssssswe9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/1-step-equations-with-fractions/ssssswe9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/1-step-equations-with-fractions/ssssswe9"/>
      <lastmod>2026-11-02T13:41:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabolas-parallel-lines-and-intersections/ssssswee</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolas-parallel-lines-and-intersections/ssssswee"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolas-parallel-lines-and-intersections/ssssswee"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolas-parallel-lines-and-intersections/ssssswee"/>
      <lastmod>2026-11-02T16:37:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabolas-parallel-lines-and-intersections/ssssswee</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabolas-parallel-lines-and-intersections/ssssswee"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabolas-parallel-lines-and-intersections/ssssswee"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabolas-parallel-lines-and-intersections/ssssswee"/>
      <lastmod>2026-11-02T16:37:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-fractal-tree/ssssswev</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-fractal-tree/ssssswev"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-fractal-tree/ssssswev"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-fractal-tree/ssssswev"/>
      <lastmod>2026-11-02T16:54:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-fractal-tree/ssssswev</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-fractal-tree/ssssswev"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-fractal-tree/ssssswev"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-fractal-tree/ssssswev"/>
      <lastmod>2026-11-02T16:54:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-unknown-angles-example/ssssswe4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-unknown-angles-example/ssssswe4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-unknown-angles-example/ssssswe4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-unknown-angles-example/ssssswe4"/>
      <lastmod>2026-11-02T10:36:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-unknown-angles-example/ssssswe4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-unknown-angles-example/ssssswe4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-unknown-angles-example/ssssswe4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-unknown-angles-example/ssssswe4"/>
      <lastmod>2026-11-02T10:36:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modifiable-solid-regular-decagon-cross-sections-parallel-to-yaxis/ssssswel</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modifiable-solid-regular-decagon-cross-sections-parallel-to-yaxis/ssssswel"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modifiable-solid-regular-decagon-cross-sections-parallel-to-yaxis/ssssswel"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modifiable-solid-regular-decagon-cross-sections-parallel-to-yaxis/ssssswel"/>
      <lastmod>2026-11-01T22:12:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modifiable-solid-regular-decagon-cross-sections-parallel-to-yaxis/ssssswel</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modifiable-solid-regular-decagon-cross-sections-parallel-to-yaxis/ssssswel"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modifiable-solid-regular-decagon-cross-sections-parallel-to-yaxis/ssssswel"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modifiable-solid-regular-decagon-cross-sections-parallel-to-yaxis/ssssswel"/>
      <lastmod>2026-11-01T22:12:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstrating-similar-triangles-using-dilation-tool/ssssswey</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-similar-triangles-using-dilation-tool/ssssswey"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-similar-triangles-using-dilation-tool/ssssswey"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-similar-triangles-using-dilation-tool/ssssswey"/>
      <lastmod>2026-11-02T02:19:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstrating-similar-triangles-using-dilation-tool/ssssswey</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstrating-similar-triangles-using-dilation-tool/ssssswey"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstrating-similar-triangles-using-dilation-tool/ssssswey"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstrating-similar-triangles-using-dilation-tool/ssssswey"/>
      <lastmod>2026-11-02T02:19:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-revolution-around-the-x-axis/ssssswea</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-around-the-x-axis/ssssswea"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-around-the-x-axis/ssssswea"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-around-the-x-axis/ssssswea"/>
      <lastmod>2026-11-02T12:42:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-revolution-around-the-x-axis/ssssswea</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-around-the-x-axis/ssssswea"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-around-the-x-axis/ssssswea"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-around-the-x-axis/ssssswea"/>
      <lastmod>2026-11-02T12:42:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/venn-diagram-operations/ssssswec</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-operations/ssssswec"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-operations/ssssswec"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-operations/ssssswec"/>
      <lastmod>2026-11-01T20:50:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/venn-diagram-operations/ssssswec</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-operations/ssssswec"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-operations/ssssswec"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-operations/ssssswec"/>
      <lastmod>2026-11-01T20:50:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/counting-money/ssssswer</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/counting-money/ssssswer"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/counting-money/ssssswer"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/counting-money/ssssswer"/>
      <lastmod>2026-11-02T18:11:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/counting-money/ssssswer</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/counting-money/ssssswer"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/counting-money/ssssswer"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/counting-money/ssssswer"/>
      <lastmod>2026-11-02T18:11:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-construction-symmetry-tangents-and-angle-relations/sssssweh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-symmetry-tangents-and-angle-relations/sssssweh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-symmetry-tangents-and-angle-relations/sssssweh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-symmetry-tangents-and-angle-relations/sssssweh"/>
      <lastmod>2026-11-01T21:17:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-construction-symmetry-tangents-and-angle-relations/sssssweh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-symmetry-tangents-and-angle-relations/sssssweh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-symmetry-tangents-and-angle-relations/sssssweh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-symmetry-tangents-and-angle-relations/sssssweh"/>
      <lastmod>2026-11-01T21:17:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/box-whisker-vs-histogram-demo/ssssswet</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/box-whisker-vs-histogram-demo/ssssswet"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/box-whisker-vs-histogram-demo/ssssswet"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/box-whisker-vs-histogram-demo/ssssswet"/>
      <lastmod>2026-11-01T23:22:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/box-whisker-vs-histogram-demo/ssssswet</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/box-whisker-vs-histogram-demo/ssssswet"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/box-whisker-vs-histogram-demo/ssssswet"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/box-whisker-vs-histogram-demo/ssssswet"/>
      <lastmod>2026-11-01T23:22:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/horizontal-parabola/ssssswex</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-parabola/ssssswex"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-parabola/ssssswex"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-parabola/ssssswex"/>
      <lastmod>2026-11-02T17:03:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/horizontal-parabola/ssssswex</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-parabola/ssssswex"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-parabola/ssssswex"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-parabola/ssssswex"/>
      <lastmod>2026-11-02T17:03:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/correlation-investigation-dynamic-scatterplot-and-pearson-s-r/ssssswei</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/correlation-investigation-dynamic-scatterplot-and-pearson-s-r/ssssswei"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/correlation-investigation-dynamic-scatterplot-and-pearson-s-r/ssssswei"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/correlation-investigation-dynamic-scatterplot-and-pearson-s-r/ssssswei"/>
      <lastmod>2026-11-02T02:31:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/correlation-investigation-dynamic-scatterplot-and-pearson-s-r/ssssswei</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/correlation-investigation-dynamic-scatterplot-and-pearson-s-r/ssssswei"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/correlation-investigation-dynamic-scatterplot-and-pearson-s-r/ssssswei"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/correlation-investigation-dynamic-scatterplot-and-pearson-s-r/ssssswei"/>
      <lastmod>2026-11-02T02:31:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/roman-mosaic-geometric-pattern-rotation-and-sequence-transformation/sssssweo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roman-mosaic-geometric-pattern-rotation-and-sequence-transformation/sssssweo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roman-mosaic-geometric-pattern-rotation-and-sequence-transformation/sssssweo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roman-mosaic-geometric-pattern-rotation-and-sequence-transformation/sssssweo"/>
      <lastmod>2026-11-02T18:13:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/roman-mosaic-geometric-pattern-rotation-and-sequence-transformation/sssssweo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roman-mosaic-geometric-pattern-rotation-and-sequence-transformation/sssssweo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roman-mosaic-geometric-pattern-rotation-and-sequence-transformation/sssssweo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roman-mosaic-geometric-pattern-rotation-and-sequence-transformation/sssssweo"/>
      <lastmod>2026-11-02T18:13:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-triangles-and-geometric-mean-demo/ssssswvs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangles-and-geometric-mean-demo/ssssswvs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangles-and-geometric-mean-demo/ssssswvs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangles-and-geometric-mean-demo/ssssswvs"/>
      <lastmod>2026-11-02T08:39:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-triangles-and-geometric-mean-demo/ssssswvs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangles-and-geometric-mean-demo/ssssswvs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangles-and-geometric-mean-demo/ssssswvs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangles-and-geometric-mean-demo/ssssswvs"/>
      <lastmod>2026-11-02T08:39:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cuboid-surface-area-calculation-by-maths-homeschool-online/ssssswv7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cuboid-surface-area-calculation-by-maths-homeschool-online/ssssswv7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cuboid-surface-area-calculation-by-maths-homeschool-online/ssssswv7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cuboid-surface-area-calculation-by-maths-homeschool-online/ssssswv7"/>
      <lastmod>2026-11-01T20:42:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cuboid-surface-area-calculation-by-maths-homeschool-online/ssssswv7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cuboid-surface-area-calculation-by-maths-homeschool-online/ssssswv7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cuboid-surface-area-calculation-by-maths-homeschool-online/ssssswv7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cuboid-surface-area-calculation-by-maths-homeschool-online/ssssswv7"/>
      <lastmod>2026-11-01T20:42:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersecting-taxicab-spheres/ssssswvn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersecting-taxicab-spheres/ssssswvn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersecting-taxicab-spheres/ssssswvn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersecting-taxicab-spheres/ssssswvn"/>
      <lastmod>2026-11-01T21:01:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersecting-taxicab-spheres/ssssswvn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersecting-taxicab-spheres/ssssswvn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersecting-taxicab-spheres/ssssswvn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersecting-taxicab-spheres/ssssswvn"/>
      <lastmod>2026-11-01T21:01:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-cube/ssssswv2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-cube/ssssswv2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-cube/ssssswv2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-cube/ssssswv2"/>
      <lastmod>2026-11-02T17:44:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-cube/ssssswv2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-cube/ssssswv2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-cube/ssssswv2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-cube/ssssswv2"/>
      <lastmod>2026-11-02T17:44:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hypothesis-tests-of-the-population-mean/ssssswvk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hypothesis-tests-of-the-population-mean/ssssswvk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hypothesis-tests-of-the-population-mean/ssssswvk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hypothesis-tests-of-the-population-mean/ssssswvk"/>
      <lastmod>2026-11-02T18:00:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hypothesis-tests-of-the-population-mean/ssssswvk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hypothesis-tests-of-the-population-mean/ssssswvk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hypothesis-tests-of-the-population-mean/ssssswvk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hypothesis-tests-of-the-population-mean/ssssswvk"/>
      <lastmod>2026-11-02T18:00:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-exploration/ssssswvz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-exploration/ssssswvz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-exploration/ssssswvz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-exploration/ssssswvz"/>
      <lastmod>2026-11-02T02:40:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-exploration/ssssswvz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-exploration/ssssswvz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-exploration/ssssswvz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-exploration/ssssswvz"/>
      <lastmod>2026-11-02T02:40:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cross-sections-of-a-cylinder-by-steve-phelps/ssssswv0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-cylinder-by-steve-phelps/ssssswv0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-sections-of-a-cylinder-by-steve-phelps/ssssswv0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-cylinder-by-steve-phelps/ssssswv0"/>
      <lastmod>2026-11-02T18:52:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cross-sections-of-a-cylinder-by-steve-phelps/ssssswv0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-cylinder-by-steve-phelps/ssssswv0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-sections-of-a-cylinder-by-steve-phelps/ssssswv0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-sections-of-a-cylinder-by-steve-phelps/ssssswv0"/>
      <lastmod>2026-11-02T18:52:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/combined-transformation-part-2/ssssswvd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/combined-transformation-part-2/ssssswvd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/combined-transformation-part-2/ssssswvd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/combined-transformation-part-2/ssssswvd"/>
      <lastmod>2026-11-01T19:23:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/combined-transformation-part-2/ssssswvd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/combined-transformation-part-2/ssssswvd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/combined-transformation-part-2/ssssswvd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/combined-transformation-part-2/ssssswvd"/>
      <lastmod>2026-11-01T19:23:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/locus-of-a-point-at-fixed-distance-from-a-line-segment/ssssswvf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-of-a-point-at-fixed-distance-from-a-line-segment/ssssswvf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-of-a-point-at-fixed-distance-from-a-line-segment/ssssswvf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-of-a-point-at-fixed-distance-from-a-line-segment/ssssswvf"/>
      <lastmod>2026-11-02T18:36:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/locus-of-a-point-at-fixed-distance-from-a-line-segment/ssssswvf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-of-a-point-at-fixed-distance-from-a-line-segment/ssssswvf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-of-a-point-at-fixed-distance-from-a-line-segment/ssssswvf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-of-a-point-at-fixed-distance-from-a-line-segment/ssssswvf"/>
      <lastmod>2026-11-02T18:36:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-two-paraboloids/ssssswv8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-two-paraboloids/ssssswv8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-two-paraboloids/ssssswv8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-two-paraboloids/ssssswv8"/>
      <lastmod>2026-11-01T19:21:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-two-paraboloids/ssssswv8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-two-paraboloids/ssssswv8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-two-paraboloids/ssssswv8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-two-paraboloids/ssssswv8"/>
      <lastmod>2026-11-01T19:21:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-6-2-8-lesson-price-per-item/ssssswvu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-2-8-lesson-price-per-item/ssssswvu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-2-8-lesson-price-per-item/ssssswvu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-2-8-lesson-price-per-item/ssssswvu"/>
      <lastmod>2026-11-01T20:39:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-6-2-8-lesson-price-per-item/ssssswvu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-6-2-8-lesson-price-per-item/ssssswvu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-6-2-8-lesson-price-per-item/ssssswvu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-6-2-8-lesson-price-per-item/ssssswvu"/>
      <lastmod>2026-11-01T20:39:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spiral-mihai-v-polygonal-rotation-and-translation-forming-a-spiral-surface/ssssswv5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-mihai-v-polygonal-rotation-and-translation-forming-a-spiral-surface/ssssswv5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-mihai-v-polygonal-rotation-and-translation-forming-a-spiral-surface/ssssswv5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-mihai-v-polygonal-rotation-and-translation-forming-a-spiral-surface/ssssswv5"/>
      <lastmod>2026-11-01T21:48:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spiral-mihai-v-polygonal-rotation-and-translation-forming-a-spiral-surface/ssssswv5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-mihai-v-polygonal-rotation-and-translation-forming-a-spiral-surface/ssssswv5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-mihai-v-polygonal-rotation-and-translation-forming-a-spiral-surface/ssssswv5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-mihai-v-polygonal-rotation-and-translation-forming-a-spiral-surface/ssssswv5"/>
      <lastmod>2026-11-01T21:48:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-numbers-by-auston-b-cron/ssssswvb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-numbers-by-auston-b-cron/ssssswvb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-numbers-by-auston-b-cron/ssssswvb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-numbers-by-auston-b-cron/ssssswvb"/>
      <lastmod>2026-11-02T16:44:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-numbers-by-auston-b-cron/ssssswvb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-numbers-by-auston-b-cron/ssssswvb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-numbers-by-auston-b-cron/ssssswvb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-numbers-by-auston-b-cron/ssssswvb"/>
      <lastmod>2026-11-02T16:44:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-intuition-of-multiplying-numbers/ssssswv3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-intuition-of-multiplying-numbers/ssssswv3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-intuition-of-multiplying-numbers/ssssswv3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-intuition-of-multiplying-numbers/ssssswv3"/>
      <lastmod>2026-11-02T00:22:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-intuition-of-multiplying-numbers/ssssswv3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-intuition-of-multiplying-numbers/ssssswv3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-intuition-of-multiplying-numbers/ssssswv3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-intuition-of-multiplying-numbers/ssssswv3"/>
      <lastmod>2026-11-02T00:22:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-construction-demo/ssssswvq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-construction-demo/ssssswvq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-construction-demo/ssssswvq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-construction-demo/ssssswvq"/>
      <lastmod>2026-11-02T03:16:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-construction-demo/ssssswvq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-construction-demo/ssssswvq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-construction-demo/ssssswvq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-construction-demo/ssssswvq"/>
      <lastmod>2026-11-02T03:16:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/temperature-vs-time-simulation-by-harrytomalley-2/ssssswv1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temperature-vs-time-simulation-by-harrytomalley-2/ssssswv1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temperature-vs-time-simulation-by-harrytomalley-2/ssssswv1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temperature-vs-time-simulation-by-harrytomalley-2/ssssswv1"/>
      <lastmod>2026-11-02T18:34:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/temperature-vs-time-simulation-by-harrytomalley-2/ssssswv1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temperature-vs-time-simulation-by-harrytomalley-2/ssssswv1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temperature-vs-time-simulation-by-harrytomalley-2/ssssswv1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temperature-vs-time-simulation-by-harrytomalley-2/ssssswv1"/>
      <lastmod>2026-11-02T18:34:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-geometric-illustration-by-tim-brzezinski-3/ssssswvm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometric-illustration-by-tim-brzezinski-3/ssssswvm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometric-illustration-by-tim-brzezinski-3/ssssswvm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometric-illustration-by-tim-brzezinski-3/ssssswvm"/>
      <lastmod>2026-11-02T17:49:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-geometric-illustration-by-tim-brzezinski-3/ssssswvm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometric-illustration-by-tim-brzezinski-3/ssssswvm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometric-illustration-by-tim-brzezinski-3/ssssswvm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometric-illustration-by-tim-brzezinski-3/ssssswvm"/>
      <lastmod>2026-11-02T17:49:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/find-angles-using-trigonometry/ssssswvj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-angles-using-trigonometry/ssssswvj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-angles-using-trigonometry/ssssswvj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-angles-using-trigonometry/ssssswvj"/>
      <lastmod>2026-11-02T12:04:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/find-angles-using-trigonometry/ssssswvj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-angles-using-trigonometry/ssssswvj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-angles-using-trigonometry/ssssswvj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-angles-using-trigonometry/ssssswvj"/>
      <lastmod>2026-11-02T12:04:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-exploration-of-vertex-form-of-quadratic-relations-qr2-03-p2a-xt1/ssssswvp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-vertex-form-of-quadratic-relations-qr2-03-p2a-xt1/ssssswvp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-exploration-of-vertex-form-of-quadratic-relations-qr2-03-p2a-xt1/ssssswvp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-vertex-form-of-quadratic-relations-qr2-03-p2a-xt1/ssssswvp"/>
      <lastmod>2026-11-02T00:14:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-exploration-of-vertex-form-of-quadratic-relations-qr2-03-p2a-xt1/ssssswvp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-vertex-form-of-quadratic-relations-qr2-03-p2a-xt1/ssssswvp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-exploration-of-vertex-form-of-quadratic-relations-qr2-03-p2a-xt1/ssssswvp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-exploration-of-vertex-form-of-quadratic-relations-qr2-03-p2a-xt1/ssssswvp"/>
      <lastmod>2026-11-02T00:14:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-vector-parallelogram-construction/ssssswvw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-vector-parallelogram-construction/ssssswvw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-vector-parallelogram-construction/ssssswvw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-vector-parallelogram-construction/ssssswvw"/>
      <lastmod>2026-11-02T09:17:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-vector-parallelogram-construction/ssssswvw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-vector-parallelogram-construction/ssssswvw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-vector-parallelogram-construction/ssssswvw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-vector-parallelogram-construction/ssssswvw"/>
      <lastmod>2026-11-02T09:17:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-components-by-josh-watts/ssssswv6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-components-by-josh-watts/ssssswv6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-components-by-josh-watts/ssssswv6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-components-by-josh-watts/ssssswv6"/>
      <lastmod>2026-11-02T09:35:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-components-by-josh-watts/ssssswv6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-components-by-josh-watts/ssssswv6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-components-by-josh-watts/ssssswv6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-components-by-josh-watts/ssssswv6"/>
      <lastmod>2026-11-02T09:35:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-intersecting-circles-angles-similar-triangles-and-geometric-construction/ssssswvg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-intersecting-circles-angles-similar-triangles-and-geometric-construction/ssssswvg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-intersecting-circles-angles-similar-triangles-and-geometric-construction/ssssswvg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-intersecting-circles-angles-similar-triangles-and-geometric-construction/ssssswvg"/>
      <lastmod>2026-11-01T19:08:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-intersecting-circles-angles-similar-triangles-and-geometric-construction/ssssswvg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-intersecting-circles-angles-similar-triangles-and-geometric-construction/ssssswvg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-intersecting-circles-angles-similar-triangles-and-geometric-construction/ssssswvg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-intersecting-circles-angles-similar-triangles-and-geometric-construction/ssssswvg"/>
      <lastmod>2026-11-01T19:08:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parametric-investigation-visualizing-curves-across-math-topics/ssssswv9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-investigation-visualizing-curves-across-math-topics/ssssswv9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-investigation-visualizing-curves-across-math-topics/ssssswv9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-investigation-visualizing-curves-across-math-topics/ssssswv9"/>
      <lastmod>2026-11-01T20:44:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parametric-investigation-visualizing-curves-across-math-topics/ssssswv9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametric-investigation-visualizing-curves-across-math-topics/ssssswv9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametric-investigation-visualizing-curves-across-math-topics/ssssswv9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametric-investigation-visualizing-curves-across-math-topics/ssssswv9"/>
      <lastmod>2026-11-01T20:44:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construction-of-an-irregular-pyramid/ssssswve</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-an-irregular-pyramid/ssssswve"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-an-irregular-pyramid/ssssswve"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-an-irregular-pyramid/ssssswve"/>
      <lastmod>2026-11-02T12:41:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construction-of-an-irregular-pyramid/ssssswve</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-an-irregular-pyramid/ssssswve"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-an-irregular-pyramid/ssssswve"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-an-irregular-pyramid/ssssswve"/>
      <lastmod>2026-11-02T12:41:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/first-egg-to-pick-up-interactive-3d-vector-and-optimization-demo/ssssswvv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/first-egg-to-pick-up-interactive-3d-vector-and-optimization-demo/ssssswvv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/first-egg-to-pick-up-interactive-3d-vector-and-optimization-demo/ssssswvv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/first-egg-to-pick-up-interactive-3d-vector-and-optimization-demo/ssssswvv"/>
      <lastmod>2026-11-01T19:02:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/first-egg-to-pick-up-interactive-3d-vector-and-optimization-demo/ssssswvv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/first-egg-to-pick-up-interactive-3d-vector-and-optimization-demo/ssssswvv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/first-egg-to-pick-up-interactive-3d-vector-and-optimization-demo/ssssswvv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/first-egg-to-pick-up-interactive-3d-vector-and-optimization-demo/ssssswvv"/>
      <lastmod>2026-11-01T19:02:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-by-harrytomalley/ssssswv4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-by-harrytomalley/ssssswv4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temperature-vs-time-multiplication-by-harrytomalley/ssssswv4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-by-harrytomalley/ssssswv4"/>
      <lastmod>2026-11-02T03:08:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/temperature-vs-time-multiplication-by-harrytomalley/ssssswv4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-by-harrytomalley/ssssswv4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temperature-vs-time-multiplication-by-harrytomalley/ssssswv4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-by-harrytomalley/ssssswv4"/>
      <lastmod>2026-11-02T03:08:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quick-slope-types-illustrator-by-corey-rasmussen/ssssswvl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quick-slope-types-illustrator-by-corey-rasmussen/ssssswvl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quick-slope-types-illustrator-by-corey-rasmussen/ssssswvl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quick-slope-types-illustrator-by-corey-rasmussen/ssssswvl"/>
      <lastmod>2026-11-01T21:19:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quick-slope-types-illustrator-by-corey-rasmussen/ssssswvl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quick-slope-types-illustrator-by-corey-rasmussen/ssssswvl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quick-slope-types-illustrator-by-corey-rasmussen/ssssswvl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quick-slope-types-illustrator-by-corey-rasmussen/ssssswvl"/>
      <lastmod>2026-11-01T21:19:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-construction-by-b-caplan/ssssswvy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-construction-by-b-caplan/ssssswvy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-construction-by-b-caplan/ssssswvy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-construction-by-b-caplan/ssssswvy"/>
      <lastmod>2026-11-02T12:35:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-construction-by-b-caplan/ssssswvy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-construction-by-b-caplan/ssssswvy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-construction-by-b-caplan/ssssswvy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-construction-by-b-caplan/ssssswvy"/>
      <lastmod>2026-11-02T12:35:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/doughnut-model/ssssswva</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/doughnut-model/ssssswva"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/doughnut-model/ssssswva"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/doughnut-model/ssssswva"/>
      <lastmod>2026-11-01T21:51:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/doughnut-model/ssssswva</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/doughnut-model/ssssswva"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/doughnut-model/ssssswva"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/doughnut-model/ssssswva"/>
      <lastmod>2026-11-01T21:51:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflecting-across-a-mirror-line/ssssswvc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflecting-across-a-mirror-line/ssssswvc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflecting-across-a-mirror-line/ssssswvc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflecting-across-a-mirror-line/ssssswvc"/>
      <lastmod>2026-11-02T17:41:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflecting-across-a-mirror-line/ssssswvc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflecting-across-a-mirror-line/ssssswvc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflecting-across-a-mirror-line/ssssswvc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflecting-across-a-mirror-line/ssssswvc"/>
      <lastmod>2026-11-02T17:41:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-sliders/ssssswvr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-sliders/ssssswvr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-sliders/ssssswvr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-sliders/ssssswvr"/>
      <lastmod>2026-11-02T15:01:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-sliders/ssssswvr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-sliders/ssssswvr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-sliders/ssssswvr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-sliders/ssssswvr"/>
      <lastmod>2026-11-02T15:01:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/understanding-perimeter/ssssswvh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/understanding-perimeter/ssssswvh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/understanding-perimeter/ssssswvh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/understanding-perimeter/ssssswvh"/>
      <lastmod>2026-11-02T08:54:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/understanding-perimeter/ssssswvh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/understanding-perimeter/ssssswvh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/understanding-perimeter/ssssswvh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/understanding-perimeter/ssssswvh"/>
      <lastmod>2026-11-02T08:54:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dependent-system-of-linear-equations/ssssswvt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dependent-system-of-linear-equations/ssssswvt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dependent-system-of-linear-equations/ssssswvt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dependent-system-of-linear-equations/ssssswvt"/>
      <lastmod>2026-11-02T18:41:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dependent-system-of-linear-equations/ssssswvt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dependent-system-of-linear-equations/ssssswvt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dependent-system-of-linear-equations/ssssswvt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dependent-system-of-linear-equations/ssssswvt"/>
      <lastmod>2026-11-02T18:41:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-point-symmetry/ssssswvx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-point-symmetry/ssssswvx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-point-symmetry/ssssswvx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-point-symmetry/ssssswvx"/>
      <lastmod>2026-11-02T00:43:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-point-symmetry/ssssswvx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-point-symmetry/ssssswvx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-point-symmetry/ssssswvx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-point-symmetry/ssssswvx"/>
      <lastmod>2026-11-02T00:43:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ambiguous-case-of-sines/ssssswvi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ambiguous-case-of-sines/ssssswvi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ambiguous-case-of-sines/ssssswvi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ambiguous-case-of-sines/ssssswvi"/>
      <lastmod>2026-11-02T12:40:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ambiguous-case-of-sines/ssssswvi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ambiguous-case-of-sines/ssssswvi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ambiguous-case-of-sines/ssssswvi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ambiguous-case-of-sines/ssssswvi"/>
      <lastmod>2026-11-02T12:40:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/euler-line-surprise-dynamic-scalene-triangle-demonstration/ssssswvo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euler-line-surprise-dynamic-scalene-triangle-demonstration/ssssswvo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euler-line-surprise-dynamic-scalene-triangle-demonstration/ssssswvo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euler-line-surprise-dynamic-scalene-triangle-demonstration/ssssswvo"/>
      <lastmod>2026-11-02T18:18:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/euler-line-surprise-dynamic-scalene-triangle-demonstration/ssssswvo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euler-line-surprise-dynamic-scalene-triangle-demonstration/ssssswvo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euler-line-surprise-dynamic-scalene-triangle-demonstration/ssssswvo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euler-line-surprise-dynamic-scalene-triangle-demonstration/ssssswvo"/>
      <lastmod>2026-11-02T18:18:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/uae-geometric-construction-twenty-point-pair-equilateral-triangles-and-quadrila/sssssw4s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/uae-geometric-construction-twenty-point-pair-equilateral-triangles-and-quadrila/sssssw4s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/uae-geometric-construction-twenty-point-pair-equilateral-triangles-and-quadrila/sssssw4s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/uae-geometric-construction-twenty-point-pair-equilateral-triangles-and-quadrila/sssssw4s"/>
      <lastmod>2026-11-01T20:42:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/uae-geometric-construction-twenty-point-pair-equilateral-triangles-and-quadrila/sssssw4s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/uae-geometric-construction-twenty-point-pair-equilateral-triangles-and-quadrila/sssssw4s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/uae-geometric-construction-twenty-point-pair-equilateral-triangles-and-quadrila/sssssw4s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/uae-geometric-construction-twenty-point-pair-equilateral-triangles-and-quadrila/sssssw4s"/>
      <lastmod>2026-11-01T20:42:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-construction-by-molly-endyke/sssssw47</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-by-molly-endyke/sssssw47"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-by-molly-endyke/sssssw47"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-by-molly-endyke/sssssw47"/>
      <lastmod>2026-11-02T17:52:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-construction-by-molly-endyke/sssssw47</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-by-molly-endyke/sssssw47"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-by-molly-endyke/sssssw47"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-by-molly-endyke/sssssw47"/>
      <lastmod>2026-11-02T17:52:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/standard-deviation-testing/sssssw4n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-deviation-testing/sssssw4n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-deviation-testing/sssssw4n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-deviation-testing/sssssw4n"/>
      <lastmod>2026-11-01T23:52:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/standard-deviation-testing/sssssw4n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-deviation-testing/sssssw4n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-deviation-testing/sssssw4n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-deviation-testing/sssssw4n"/>
      <lastmod>2026-11-01T23:52:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cavalieri-s-principle-cone-and-pyramid/sssssw42</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cavalieri-s-principle-cone-and-pyramid/sssssw42"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cavalieri-s-principle-cone-and-pyramid/sssssw42"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cavalieri-s-principle-cone-and-pyramid/sssssw42"/>
      <lastmod>2026-11-02T18:34:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cavalieri-s-principle-cone-and-pyramid/sssssw42</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cavalieri-s-principle-cone-and-pyramid/sssssw42"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cavalieri-s-principle-cone-and-pyramid/sssssw42"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cavalieri-s-principle-cone-and-pyramid/sssssw42"/>
      <lastmod>2026-11-02T18:34:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gradient-and-directional-derivative/sssssw4k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gradient-and-directional-derivative/sssssw4k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gradient-and-directional-derivative/sssssw4k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gradient-and-directional-derivative/sssssw4k"/>
      <lastmod>2026-11-01T19:19:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gradient-and-directional-derivative/sssssw4k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gradient-and-directional-derivative/sssssw4k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gradient-and-directional-derivative/sssssw4k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gradient-and-directional-derivative/sssssw4k"/>
      <lastmod>2026-11-01T19:19:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/seat-logo/sssssw4z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/seat-logo/sssssw4z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/seat-logo/sssssw4z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/seat-logo/sssssw4z"/>
      <lastmod>2026-11-01T21:14:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/seat-logo/sssssw4z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/seat-logo/sssssw4z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/seat-logo/sssssw4z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/seat-logo/sssssw4z"/>
      <lastmod>2026-11-01T21:14:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-isosceles-triangles-by-dan-dale/sssssw40</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-isosceles-triangles-by-dan-dale/sssssw40"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-isosceles-triangles-by-dan-dale/sssssw40"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-isosceles-triangles-by-dan-dale/sssssw40"/>
      <lastmod>2026-11-02T09:28:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-isosceles-triangles-by-dan-dale/sssssw40</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-isosceles-triangles-by-dan-dale/sssssw40"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-isosceles-triangles-by-dan-dale/sssssw40"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-isosceles-triangles-by-dan-dale/sssssw40"/>
      <lastmod>2026-11-02T09:28:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-systems-with-and-without-parameters/sssssw4d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-systems-with-and-without-parameters/sssssw4d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-systems-with-and-without-parameters/sssssw4d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-systems-with-and-without-parameters/sssssw4d"/>
      <lastmod>2026-11-01T21:18:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-systems-with-and-without-parameters/sssssw4d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-systems-with-and-without-parameters/sssssw4d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-systems-with-and-without-parameters/sssssw4d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-systems-with-and-without-parameters/sssssw4d"/>
      <lastmod>2026-11-01T21:18:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/projectile-motion-vector-and-quadratic-function-dynamic-simulation/sssssw4f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/projectile-motion-vector-and-quadratic-function-dynamic-simulation/sssssw4f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/projectile-motion-vector-and-quadratic-function-dynamic-simulation/sssssw4f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/projectile-motion-vector-and-quadratic-function-dynamic-simulation/sssssw4f"/>
      <lastmod>2026-11-01T20:54:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/projectile-motion-vector-and-quadratic-function-dynamic-simulation/sssssw4f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/projectile-motion-vector-and-quadratic-function-dynamic-simulation/sssssw4f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/projectile-motion-vector-and-quadratic-function-dynamic-simulation/sssssw4f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/projectile-motion-vector-and-quadratic-function-dynamic-simulation/sssssw4f"/>
      <lastmod>2026-11-01T20:54:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/point-of-intersection/sssssw48</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-of-intersection/sssssw48"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-of-intersection/sssssw48"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-of-intersection/sssssw48"/>
      <lastmod>2026-11-02T16:29:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/point-of-intersection/sssssw48</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-of-intersection/sssssw48"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-of-intersection/sssssw48"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-of-intersection/sssssw48"/>
      <lastmod>2026-11-02T16:29:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-lines-by-belinda-elliott/sssssw4u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-lines-by-belinda-elliott/sssssw4u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-lines-by-belinda-elliott/sssssw4u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-lines-by-belinda-elliott/sssssw4u"/>
      <lastmod>2026-11-02T12:00:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-lines-by-belinda-elliott/sssssw4u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-lines-by-belinda-elliott/sssssw4u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-lines-by-belinda-elliott/sssssw4u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-lines-by-belinda-elliott/sssssw4u"/>
      <lastmod>2026-11-02T12:00:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/iterated-function-system-with-affine-maps/sssssw45</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/iterated-function-system-with-affine-maps/sssssw45"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/iterated-function-system-with-affine-maps/sssssw45"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/iterated-function-system-with-affine-maps/sssssw45"/>
      <lastmod>2026-11-02T03:01:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/iterated-function-system-with-affine-maps/sssssw45</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/iterated-function-system-with-affine-maps/sssssw45"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/iterated-function-system-with-affine-maps/sssssw45"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/iterated-function-system-with-affine-maps/sssssw45"/>
      <lastmod>2026-11-02T03:01:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-median-illustrator-definition-writing-prompt/sssssw4b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-median-illustrator-definition-writing-prompt/sssssw4b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-median-illustrator-definition-writing-prompt/sssssw4b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-median-illustrator-definition-writing-prompt/sssssw4b"/>
      <lastmod>2026-11-01T23:21:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-median-illustrator-definition-writing-prompt/sssssw4b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-median-illustrator-definition-writing-prompt/sssssw4b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-median-illustrator-definition-writing-prompt/sssssw4b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-median-illustrator-definition-writing-prompt/sssssw4b"/>
      <lastmod>2026-11-01T23:21:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/connections-between-points-by-chris-cambr-2/sssssw43</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connections-between-points-by-chris-cambr-2/sssssw43"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connections-between-points-by-chris-cambr-2/sssssw43"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connections-between-points-by-chris-cambr-2/sssssw43"/>
      <lastmod>2026-11-02T17:59:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/connections-between-points-by-chris-cambr-2/sssssw43</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/connections-between-points-by-chris-cambr-2/sssssw43"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/connections-between-points-by-chris-cambr-2/sssssw43"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/connections-between-points-by-chris-cambr-2/sssssw43"/>
      <lastmod>2026-11-02T17:59:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-mass-function-of-a-binomial-distribution/sssssw4q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-mass-function-of-a-binomial-distribution/sssssw4q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-mass-function-of-a-binomial-distribution/sssssw4q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-mass-function-of-a-binomial-distribution/sssssw4q"/>
      <lastmod>2026-11-01T21:17:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-mass-function-of-a-binomial-distribution/sssssw4q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-mass-function-of-a-binomial-distribution/sssssw4q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-mass-function-of-a-binomial-distribution/sssssw4q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-mass-function-of-a-binomial-distribution/sssssw4q"/>
      <lastmod>2026-11-01T21:17:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-vectors-and-tangents-a-mod-5-lab-construction/sssssw41</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-vectors-and-tangents-a-mod-5-lab-construction/sssssw41"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-vectors-and-tangents-a-mod-5-lab-construction/sssssw41"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-vectors-and-tangents-a-mod-5-lab-construction/sssssw41"/>
      <lastmod>2026-11-01T19:23:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-vectors-and-tangents-a-mod-5-lab-construction/sssssw41</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-vectors-and-tangents-a-mod-5-lab-construction/sssssw41"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-vectors-and-tangents-a-mod-5-lab-construction/sssssw41"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-vectors-and-tangents-a-mod-5-lab-construction/sssssw41"/>
      <lastmod>2026-11-01T19:23:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mathematical-principles-of-earth-s-sunrise-and-sunset-phenomena/sssssw4m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mathematical-principles-of-earth-s-sunrise-and-sunset-phenomena/sssssw4m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mathematical-principles-of-earth-s-sunrise-and-sunset-phenomena/sssssw4m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mathematical-principles-of-earth-s-sunrise-and-sunset-phenomena/sssssw4m"/>
      <lastmod>2026-11-02T00:52:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mathematical-principles-of-earth-s-sunrise-and-sunset-phenomena/sssssw4m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mathematical-principles-of-earth-s-sunrise-and-sunset-phenomena/sssssw4m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mathematical-principles-of-earth-s-sunrise-and-sunset-phenomena/sssssw4m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mathematical-principles-of-earth-s-sunrise-and-sunset-phenomena/sssssw4m"/>
      <lastmod>2026-11-02T00:52:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-intersection-of-two-cylinders/sssssw4j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-intersection-of-two-cylinders/sssssw4j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-intersection-of-two-cylinders/sssssw4j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-intersection-of-two-cylinders/sssssw4j"/>
      <lastmod>2026-11-02T13:13:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-intersection-of-two-cylinders/sssssw4j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-intersection-of-two-cylinders/sssssw4j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-intersection-of-two-cylinders/sssssw4j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-intersection-of-two-cylinders/sssssw4j"/>
      <lastmod>2026-11-02T13:13:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-systems-of-linear-equations-algebraically-by-heather-yaeger/sssssw4p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-systems-of-linear-equations-algebraically-by-heather-yaeger/sssssw4p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-systems-of-linear-equations-algebraically-by-heather-yaeger/sssssw4p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-systems-of-linear-equations-algebraically-by-heather-yaeger/sssssw4p"/>
      <lastmod>2026-11-01T23:11:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-systems-of-linear-equations-algebraically-by-heather-yaeger/sssssw4p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-systems-of-linear-equations-algebraically-by-heather-yaeger/sssssw4p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-systems-of-linear-equations-algebraically-by-heather-yaeger/sssssw4p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-systems-of-linear-equations-algebraically-by-heather-yaeger/sssssw4p"/>
      <lastmod>2026-11-01T23:11:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/matrices-rotation-by-steps-of-12/sssssw4w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrices-rotation-by-steps-of-12/sssssw4w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrices-rotation-by-steps-of-12/sssssw4w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrices-rotation-by-steps-of-12/sssssw4w"/>
      <lastmod>2026-11-01T21:00:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/matrices-rotation-by-steps-of-12/sssssw4w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/matrices-rotation-by-steps-of-12/sssssw4w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/matrices-rotation-by-steps-of-12/sssssw4w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/matrices-rotation-by-steps-of-12/sssssw4w"/>
      <lastmod>2026-11-01T21:00:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-with-table-of-values/sssssw46</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-with-table-of-values/sssssw46"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-with-table-of-values/sssssw46"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-with-table-of-values/sssssw46"/>
      <lastmod>2026-11-01T23:34:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-with-table-of-values/sssssw46</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-with-table-of-values/sssssw46"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-with-table-of-values/sssssw46"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-with-table-of-values/sssssw46"/>
      <lastmod>2026-11-01T23:34:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-relationships-graphing-slope-types/sssssw4g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-relationships-graphing-slope-types/sssssw4g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-relationships-graphing-slope-types/sssssw4g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-relationships-graphing-slope-types/sssssw4g"/>
      <lastmod>2026-11-01T21:11:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-relationships-graphing-slope-types/sssssw4g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-relationships-graphing-slope-types/sssssw4g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-relationships-graphing-slope-types/sssssw4g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-relationships-graphing-slope-types/sssssw4g"/>
      <lastmod>2026-11-01T21:11:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/random-walk-with-walls/sssssw49</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-walk-with-walls/sssssw49"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-walk-with-walls/sssssw49"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-walk-with-walls/sssssw49"/>
      <lastmod>2026-11-02T16:58:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/random-walk-with-walls/sssssw49</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/random-walk-with-walls/sssssw49"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/random-walk-with-walls/sssssw49"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/random-walk-with-walls/sssssw49"/>
      <lastmod>2026-11-02T16:58:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/euler-s-method-visualization/sssssw4e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euler-s-method-visualization/sssssw4e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euler-s-method-visualization/sssssw4e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euler-s-method-visualization/sssssw4e"/>
      <lastmod>2026-11-02T09:42:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/euler-s-method-visualization/sssssw4e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/euler-s-method-visualization/sssssw4e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/euler-s-method-visualization/sssssw4e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/euler-s-method-visualization/sssssw4e"/>
      <lastmod>2026-11-02T09:42:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inner-common-tangent-of-two-circles/sssssw4v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inner-common-tangent-of-two-circles/sssssw4v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inner-common-tangent-of-two-circles/sssssw4v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inner-common-tangent-of-two-circles/sssssw4v"/>
      <lastmod>2026-11-01T19:31:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inner-common-tangent-of-two-circles/sssssw4v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inner-common-tangent-of-two-circles/sssssw4v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inner-common-tangent-of-two-circles/sssssw4v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inner-common-tangent-of-two-circles/sssssw4v"/>
      <lastmod>2026-11-01T19:31:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/toboggan-trajectory-and-geometric-construction/sssssw44</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/toboggan-trajectory-and-geometric-construction/sssssw44"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/toboggan-trajectory-and-geometric-construction/sssssw44"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/toboggan-trajectory-and-geometric-construction/sssssw44"/>
      <lastmod>2026-11-02T18:33:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/toboggan-trajectory-and-geometric-construction/sssssw44</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/toboggan-trajectory-and-geometric-construction/sssssw44"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/toboggan-trajectory-and-geometric-construction/sssssw44"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/toboggan-trajectory-and-geometric-construction/sssssw44"/>
      <lastmod>2026-11-02T18:33:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-ratios-investigation-by-mrslim/sssssw4l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-investigation-by-mrslim/sssssw4l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-investigation-by-mrslim/sssssw4l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-investigation-by-mrslim/sssssw4l"/>
      <lastmod>2026-11-02T17:59:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-ratios-investigation-by-mrslim/sssssw4l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-investigation-by-mrslim/sssssw4l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-ratios-investigation-by-mrslim/sssssw4l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-ratios-investigation-by-mrslim/sssssw4l"/>
      <lastmod>2026-11-02T17:59:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lesson-4-quadratic-inequalities-part-ii/sssssw4y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lesson-4-quadratic-inequalities-part-ii/sssssw4y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lesson-4-quadratic-inequalities-part-ii/sssssw4y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lesson-4-quadratic-inequalities-part-ii/sssssw4y"/>
      <lastmod>2026-11-02T18:32:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lesson-4-quadratic-inequalities-part-ii/sssssw4y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lesson-4-quadratic-inequalities-part-ii/sssssw4y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lesson-4-quadratic-inequalities-part-ii/sssssw4y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lesson-4-quadratic-inequalities-part-ii/sssssw4y"/>
      <lastmod>2026-11-02T18:32:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-isosceles-triangles-by-martin-flashman/sssssw4a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-isosceles-triangles-by-martin-flashman/sssssw4a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-isosceles-triangles-by-martin-flashman/sssssw4a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-isosceles-triangles-by-martin-flashman/sssssw4a"/>
      <lastmod>2026-11-02T12:39:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-isosceles-triangles-by-martin-flashman/sssssw4a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-isosceles-triangles-by-martin-flashman/sssssw4a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-isosceles-triangles-by-martin-flashman/sssssw4a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-isosceles-triangles-by-martin-flashman/sssssw4a"/>
      <lastmod>2026-11-02T12:39:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/direction-angles-cosines-and-ratios/sssssw4c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/direction-angles-cosines-and-ratios/sssssw4c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/direction-angles-cosines-and-ratios/sssssw4c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/direction-angles-cosines-and-ratios/sssssw4c"/>
      <lastmod>2026-11-02T16:45:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/direction-angles-cosines-and-ratios/sssssw4c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/direction-angles-cosines-and-ratios/sssssw4c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/direction-angles-cosines-and-ratios/sssssw4c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/direction-angles-cosines-and-ratios/sssssw4c"/>
      <lastmod>2026-11-02T16:45:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-revolution-disks/sssssw4r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-disks/sssssw4r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-disks/sssssw4r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-disks/sssssw4r"/>
      <lastmod>2026-11-01T21:44:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-revolution-disks/sssssw4r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-disks/sssssw4r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-disks/sssssw4r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-disks/sssssw4r"/>
      <lastmod>2026-11-01T21:44:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-surface-area-calculation-demo/sssssw4h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-surface-area-calculation-demo/sssssw4h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-surface-area-calculation-demo/sssssw4h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-surface-area-calculation-demo/sssssw4h"/>
      <lastmod>2026-11-02T16:40:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-surface-area-calculation-demo/sssssw4h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-surface-area-calculation-demo/sssssw4h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-surface-area-calculation-demo/sssssw4h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-surface-area-calculation-demo/sssssw4h"/>
      <lastmod>2026-11-02T16:40:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-congruence-demo-by-mr-veil/sssssw4t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-congruence-demo-by-mr-veil/sssssw4t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-congruence-demo-by-mr-veil/sssssw4t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-congruence-demo-by-mr-veil/sssssw4t"/>
      <lastmod>2026-11-02T18:12:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-congruence-demo-by-mr-veil/sssssw4t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-congruence-demo-by-mr-veil/sssssw4t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-congruence-demo-by-mr-veil/sssssw4t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-congruence-demo-by-mr-veil/sssssw4t"/>
      <lastmod>2026-11-02T18:12:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/9-8-ratio-division-demo/sssssw4x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/9-8-ratio-division-demo/sssssw4x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/9-8-ratio-division-demo/sssssw4x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/9-8-ratio-division-demo/sssssw4x"/>
      <lastmod>2026-11-02T02:32:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/9-8-ratio-division-demo/sssssw4x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/9-8-ratio-division-demo/sssssw4x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/9-8-ratio-division-demo/sssssw4x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/9-8-ratio-division-demo/sssssw4x"/>
      <lastmod>2026-11-02T02:32:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/game-4/sssssw4i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/game-4/sssssw4i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/game-4/sssssw4i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/game-4/sssssw4i"/>
      <lastmod>2026-11-01T21:42:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/game-4/sssssw4i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/game-4/sssssw4i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/game-4/sssssw4i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/game-4/sssssw4i"/>
      <lastmod>2026-11-01T21:42:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/regular-3-sided-truncated-pyramid-construction/sssssw4o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-3-sided-truncated-pyramid-construction/sssssw4o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-3-sided-truncated-pyramid-construction/sssssw4o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-3-sided-truncated-pyramid-construction/sssssw4o"/>
      <lastmod>2026-11-01T23:12:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/regular-3-sided-truncated-pyramid-construction/sssssw4o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/regular-3-sided-truncated-pyramid-construction/sssssw4o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/regular-3-sided-truncated-pyramid-construction/sssssw4o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/regular-3-sided-truncated-pyramid-construction/sssssw4o"/>
      <lastmod>2026-11-01T23:12:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/creating-a-toblerone-2-using-an-absolute-value-function/ssssswls</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/creating-a-toblerone-2-using-an-absolute-value-function/ssssswls"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/creating-a-toblerone-2-using-an-absolute-value-function/ssssswls"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/creating-a-toblerone-2-using-an-absolute-value-function/ssssswls"/>
      <lastmod>2026-11-01T21:35:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/creating-a-toblerone-2-using-an-absolute-value-function/ssssswls</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/creating-a-toblerone-2-using-an-absolute-value-function/ssssswls"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/creating-a-toblerone-2-using-an-absolute-value-function/ssssswls"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/creating-a-toblerone-2-using-an-absolute-value-function/ssssswls"/>
      <lastmod>2026-11-01T21:35:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-limit-non-existence-case-study/ssssswl7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-limit-non-existence-case-study/ssssswl7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-limit-non-existence-case-study/ssssswl7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-limit-non-existence-case-study/ssssswl7"/>
      <lastmod>2026-11-02T18:57:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-limit-non-existence-case-study/ssssswl7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-limit-non-existence-case-study/ssssswl7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-limit-non-existence-case-study/ssssswl7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-limit-non-existence-case-study/ssssswl7"/>
      <lastmod>2026-11-02T18:57:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/secant-line-through-external-point-with-chord-endpoints-as-midpoints/ssssswln</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/secant-line-through-external-point-with-chord-endpoints-as-midpoints/ssssswln"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/secant-line-through-external-point-with-chord-endpoints-as-midpoints/ssssswln"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/secant-line-through-external-point-with-chord-endpoints-as-midpoints/ssssswln"/>
      <lastmod>2026-11-02T17:55:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/secant-line-through-external-point-with-chord-endpoints-as-midpoints/ssssswln</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/secant-line-through-external-point-with-chord-endpoints-as-midpoints/ssssswln"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/secant-line-through-external-point-with-chord-endpoints-as-midpoints/ssssswln"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/secant-line-through-external-point-with-chord-endpoints-as-midpoints/ssssswln"/>
      <lastmod>2026-11-02T17:55:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-point-and-concurrent-lines/ssssswl2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-point-and-concurrent-lines/ssssswl2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-point-and-concurrent-lines/ssssswl2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-point-and-concurrent-lines/ssssswl2"/>
      <lastmod>2026-11-01T19:00:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-point-and-concurrent-lines/ssssswl2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-point-and-concurrent-lines/ssssswl2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-point-and-concurrent-lines/ssssswl2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-point-and-concurrent-lines/ssssswl2"/>
      <lastmod>2026-11-01T19:00:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/section-14-1-level-curves-and-surfaces/ssssswlk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/section-14-1-level-curves-and-surfaces/ssssswlk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/section-14-1-level-curves-and-surfaces/ssssswlk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/section-14-1-level-curves-and-surfaces/ssssswlk"/>
      <lastmod>2026-11-02T17:38:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/section-14-1-level-curves-and-surfaces/ssssswlk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/section-14-1-level-curves-and-surfaces/ssssswlk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/section-14-1-level-curves-and-surfaces/ssssswlk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/section-14-1-level-curves-and-surfaces/ssssswlk"/>
      <lastmod>2026-11-02T17:38:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadric-surfaces-demo/ssssswlz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadric-surfaces-demo/ssssswlz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadric-surfaces-demo/ssssswlz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadric-surfaces-demo/ssssswlz"/>
      <lastmod>2026-11-01T19:34:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadric-surfaces-demo/ssssswlz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadric-surfaces-demo/ssssswlz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadric-surfaces-demo/ssssswlz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadric-surfaces-demo/ssssswlz"/>
      <lastmod>2026-11-01T19:34:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/octagons-obtuse/ssssswl0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/octagons-obtuse/ssssswl0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/octagons-obtuse/ssssswl0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/octagons-obtuse/ssssswl0"/>
      <lastmod>2026-11-02T02:18:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/octagons-obtuse/ssssswl0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/octagons-obtuse/ssssswl0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/octagons-obtuse/ssssswl0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/octagons-obtuse/ssssswl0"/>
      <lastmod>2026-11-02T02:18:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/axis-of-symmetry-in-factored-form-quadratic/ssssswld</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/axis-of-symmetry-in-factored-form-quadratic/ssssswld"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/axis-of-symmetry-in-factored-form-quadratic/ssssswld"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/axis-of-symmetry-in-factored-form-quadratic/ssssswld"/>
      <lastmod>2026-11-01T19:19:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/axis-of-symmetry-in-factored-form-quadratic/ssssswld</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/axis-of-symmetry-in-factored-form-quadratic/ssssswld"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/axis-of-symmetry-in-factored-form-quadratic/ssssswld"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/axis-of-symmetry-in-factored-form-quadratic/ssssswld"/>
      <lastmod>2026-11-01T19:19:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-and-area/ssssswlf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-and-area/ssssswlf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-and-area/ssssswlf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-and-area/ssssswlf"/>
      <lastmod>2026-11-02T18:41:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-and-area/ssssswlf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-and-area/ssssswlf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-and-area/ssssswlf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-and-area/ssssswlf"/>
      <lastmod>2026-11-02T18:41:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-bars-with-text-zoom/ssssswl8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-bars-with-text-zoom/ssssswl8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-bars-with-text-zoom/ssssswl8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-bars-with-text-zoom/ssssswl8"/>
      <lastmod>2026-11-02T15:05:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-bars-with-text-zoom/ssssswl8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-bars-with-text-zoom/ssssswl8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-bars-with-text-zoom/ssssswl8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-bars-with-text-zoom/ssssswl8"/>
      <lastmod>2026-11-02T15:05:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-bisectors-of-a-triangle/ssssswlu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisectors-of-a-triangle/ssssswlu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisectors-of-a-triangle/ssssswlu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisectors-of-a-triangle/ssssswlu"/>
      <lastmod>2026-11-02T17:51:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-bisectors-of-a-triangle/ssssswlu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisectors-of-a-triangle/ssssswlu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisectors-of-a-triangle/ssssswlu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisectors-of-a-triangle/ssssswlu"/>
      <lastmod>2026-11-02T17:51:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/identifying-trig-ratios-quick-formative-assessment/ssssswl5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identifying-trig-ratios-quick-formative-assessment/ssssswl5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identifying-trig-ratios-quick-formative-assessment/ssssswl5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identifying-trig-ratios-quick-formative-assessment/ssssswl5"/>
      <lastmod>2026-11-02T02:49:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/identifying-trig-ratios-quick-formative-assessment/ssssswl5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/identifying-trig-ratios-quick-formative-assessment/ssssswl5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/identifying-trig-ratios-quick-formative-assessment/ssssswl5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/identifying-trig-ratios-quick-formative-assessment/ssssswl5"/>
      <lastmod>2026-11-02T02:49:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-function-by-tmoorehead/ssssswlb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-function-by-tmoorehead/ssssswlb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-function-by-tmoorehead/ssssswlb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-function-by-tmoorehead/ssssswlb"/>
      <lastmod>2026-11-02T18:50:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-function-by-tmoorehead/ssssswlb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-function-by-tmoorehead/ssssswlb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-function-by-tmoorehead/ssssswlb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-function-by-tmoorehead/ssssswlb"/>
      <lastmod>2026-11-02T18:50:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-rule-ambiguous-case/ssssswl3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-rule-ambiguous-case/ssssswl3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-rule-ambiguous-case/ssssswl3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-rule-ambiguous-case/ssssswl3"/>
      <lastmod>2026-11-01T23:26:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-rule-ambiguous-case/ssssswl3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-rule-ambiguous-case/ssssswl3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-rule-ambiguous-case/ssssswl3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-rule-ambiguous-case/ssssswl3"/>
      <lastmod>2026-11-01T23:26:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-area-height-outside-rectangle/ssssswlq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-area-height-outside-rectangle/ssssswlq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-area-height-outside-rectangle/ssssswlq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-area-height-outside-rectangle/ssssswlq"/>
      <lastmod>2026-11-02T16:31:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-area-height-outside-rectangle/ssssswlq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-area-height-outside-rectangle/ssssswlq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-area-height-outside-rectangle/ssssswlq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-area-height-outside-rectangle/ssssswlq"/>
      <lastmod>2026-11-02T16:31:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transforming-parabola-and-exponential-graphs/ssssswl1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transforming-parabola-and-exponential-graphs/ssssswl1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transforming-parabola-and-exponential-graphs/ssssswl1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transforming-parabola-and-exponential-graphs/ssssswl1"/>
      <lastmod>2026-11-02T17:44:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transforming-parabola-and-exponential-graphs/ssssswl1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transforming-parabola-and-exponential-graphs/ssssswl1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transforming-parabola-and-exponential-graphs/ssssswl1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transforming-parabola-and-exponential-graphs/ssssswl1"/>
      <lastmod>2026-11-02T17:44:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation-transformation-exploration/ssssswlm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-transformation-exploration/ssssswlm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-transformation-exploration/ssssswlm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-transformation-exploration/ssssswlm"/>
      <lastmod>2026-11-02T16:33:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation-transformation-exploration/ssssswlm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation-transformation-exploration/ssssswlm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation-transformation-exploration/ssssswlm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation-transformation-exploration/ssssswlm"/>
      <lastmod>2026-11-02T16:33:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-division-demonstration-by-mr-tsang/ssssswlj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-division-demonstration-by-mr-tsang/ssssswlj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-division-demonstration-by-mr-tsang/ssssswlj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-division-demonstration-by-mr-tsang/ssssswlj"/>
      <lastmod>2026-11-02T16:41:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-division-demonstration-by-mr-tsang/ssssswlj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-division-demonstration-by-mr-tsang/ssssswlj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-division-demonstration-by-mr-tsang/ssssswlj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-division-demonstration-by-mr-tsang/ssssswlj"/>
      <lastmod>2026-11-02T16:41:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-and-subtraction-demo/ssssswlp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-and-subtraction-demo/ssssswlp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-and-subtraction-demo/ssssswlp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-and-subtraction-demo/ssssswlp"/>
      <lastmod>2026-11-02T02:34:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-and-subtraction-demo/ssssswlp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-and-subtraction-demo/ssssswlp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-and-subtraction-demo/ssssswlp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-and-subtraction-demo/ssssswlp"/>
      <lastmod>2026-11-02T02:34:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-cuboid-by-gabriele-sponheimer/ssssswlw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-cuboid-by-gabriele-sponheimer/ssssswlw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-cuboid-by-gabriele-sponheimer/ssssswlw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-cuboid-by-gabriele-sponheimer/ssssswlw"/>
      <lastmod>2026-11-02T03:10:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-cuboid-by-gabriele-sponheimer/ssssswlw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-cuboid-by-gabriele-sponheimer/ssssswlw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-cuboid-by-gabriele-sponheimer/ssssswlw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-cuboid-by-gabriele-sponheimer/ssssswlw"/>
      <lastmod>2026-11-02T03:10:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/using-rectangles-to-find-bounds-for-the-area-under-a-curve/ssssswl6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-rectangles-to-find-bounds-for-the-area-under-a-curve/ssssswl6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-rectangles-to-find-bounds-for-the-area-under-a-curve/ssssswl6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-rectangles-to-find-bounds-for-the-area-under-a-curve/ssssswl6"/>
      <lastmod>2026-11-02T02:45:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/using-rectangles-to-find-bounds-for-the-area-under-a-curve/ssssswl6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-rectangles-to-find-bounds-for-the-area-under-a-curve/ssssswl6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-rectangles-to-find-bounds-for-the-area-under-a-curve/ssssswl6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-rectangles-to-find-bounds-for-the-area-under-a-curve/ssssswl6"/>
      <lastmod>2026-11-02T02:45:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-visualizer-show-fractions-with-circles-and-polygons/ssssswlg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-visualizer-show-fractions-with-circles-and-polygons/ssssswlg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-visualizer-show-fractions-with-circles-and-polygons/ssssswlg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-visualizer-show-fractions-with-circles-and-polygons/ssssswlg"/>
      <lastmod>2026-11-01T19:06:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-visualizer-show-fractions-with-circles-and-polygons/ssssswlg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-visualizer-show-fractions-with-circles-and-polygons/ssssswlg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-visualizer-show-fractions-with-circles-and-polygons/ssssswlg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-visualizer-show-fractions-with-circles-and-polygons/ssssswlg"/>
      <lastmod>2026-11-01T19:06:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-law-study/ssssswl9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-law-study/ssssswl9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-law-study/ssssswl9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-law-study/ssssswl9"/>
      <lastmod>2026-11-02T18:40:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-law-study/ssssswl9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-law-study/ssssswl9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-law-study/ssssswl9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-law-study/ssssswl9"/>
      <lastmod>2026-11-02T18:40:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-a-cone-and-a-sphere-in-geogebra/ssssswle</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-a-cone-and-a-sphere-in-geogebra/ssssswle"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-a-cone-and-a-sphere-in-geogebra/ssssswle"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-a-cone-and-a-sphere-in-geogebra/ssssswle"/>
      <lastmod>2026-11-02T17:13:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-a-cone-and-a-sphere-in-geogebra/ssssswle</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-a-cone-and-a-sphere-in-geogebra/ssssswle"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-a-cone-and-a-sphere-in-geogebra/ssssswle"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-a-cone-and-a-sphere-in-geogebra/ssssswle"/>
      <lastmod>2026-11-02T17:13:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ben-pyramid-dynamic-construction-with-parallelograms-and-similar-triangles/ssssswlv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ben-pyramid-dynamic-construction-with-parallelograms-and-similar-triangles/ssssswlv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ben-pyramid-dynamic-construction-with-parallelograms-and-similar-triangles/ssssswlv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ben-pyramid-dynamic-construction-with-parallelograms-and-similar-triangles/ssssswlv"/>
      <lastmod>2026-11-01T21:10:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ben-pyramid-dynamic-construction-with-parallelograms-and-similar-triangles/ssssswlv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ben-pyramid-dynamic-construction-with-parallelograms-and-similar-triangles/ssssswlv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ben-pyramid-dynamic-construction-with-parallelograms-and-similar-triangles/ssssswlv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ben-pyramid-dynamic-construction-with-parallelograms-and-similar-triangles/ssssswlv"/>
      <lastmod>2026-11-01T21:10:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sequence-and-function-graph/ssssswl4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sequence-and-function-graph/ssssswl4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sequence-and-function-graph/ssssswl4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sequence-and-function-graph/ssssswl4"/>
      <lastmod>2026-11-02T18:18:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sequence-and-function-graph/ssssswl4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sequence-and-function-graph/ssssswl4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sequence-and-function-graph/ssssswl4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sequence-and-function-graph/ssssswl4"/>
      <lastmod>2026-11-02T18:18:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3-d-solids-prisms-pyramids-cylinders-cones-and-spheres/ssssswll</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3-d-solids-prisms-pyramids-cylinders-cones-and-spheres/ssssswll"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3-d-solids-prisms-pyramids-cylinders-cones-and-spheres/ssssswll"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3-d-solids-prisms-pyramids-cylinders-cones-and-spheres/ssssswll"/>
      <lastmod>2026-11-02T18:50:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3-d-solids-prisms-pyramids-cylinders-cones-and-spheres/ssssswll</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3-d-solids-prisms-pyramids-cylinders-cones-and-spheres/ssssswll"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3-d-solids-prisms-pyramids-cylinders-cones-and-spheres/ssssswll"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3-d-solids-prisms-pyramids-cylinders-cones-and-spheres/ssssswll"/>
      <lastmod>2026-11-02T18:50:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-shapes-and-area-calculation-exploring-shape-and-area-with-tanram/ssssswly</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-shapes-and-area-calculation-exploring-shape-and-area-with-tanram/ssssswly"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-shapes-and-area-calculation-exploring-shape-and-area-with-tanram/ssssswly"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-shapes-and-area-calculation-exploring-shape-and-area-with-tanram/ssssswly"/>
      <lastmod>2026-11-02T00:56:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-shapes-and-area-calculation-exploring-shape-and-area-with-tanram/ssssswly</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-shapes-and-area-calculation-exploring-shape-and-area-with-tanram/ssssswly"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-shapes-and-area-calculation-exploring-shape-and-area-with-tanram/ssssswly"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-shapes-and-area-calculation-exploring-shape-and-area-with-tanram/ssssswly"/>
      <lastmod>2026-11-02T00:56:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trefoil-knot-by-steve-phelps/ssssswla</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trefoil-knot-by-steve-phelps/ssssswla"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trefoil-knot-by-steve-phelps/ssssswla"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trefoil-knot-by-steve-phelps/ssssswla"/>
      <lastmod>2026-11-02T15:43:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trefoil-knot-by-steve-phelps/ssssswla</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trefoil-knot-by-steve-phelps/ssssswla"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trefoil-knot-by-steve-phelps/ssssswla"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trefoil-knot-by-steve-phelps/ssssswla"/>
      <lastmod>2026-11-02T15:43:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-optimization-demo/ssssswlc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-optimization-demo/ssssswlc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-optimization-demo/ssssswlc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-optimization-demo/ssssswlc"/>
      <lastmod>2026-11-02T18:47:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-optimization-demo/ssssswlc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-optimization-demo/ssssswlc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-optimization-demo/ssssswlc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-optimization-demo/ssssswlc"/>
      <lastmod>2026-11-02T18:47:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/combinatorics-combination-without-repetition/ssssswlr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/combinatorics-combination-without-repetition/ssssswlr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/combinatorics-combination-without-repetition/ssssswlr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/combinatorics-combination-without-repetition/ssssswlr"/>
      <lastmod>2026-11-02T16:33:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/combinatorics-combination-without-repetition/ssssswlr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/combinatorics-combination-without-repetition/ssssswlr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/combinatorics-combination-without-repetition/ssssswlr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/combinatorics-combination-without-repetition/ssssswlr"/>
      <lastmod>2026-11-02T16:33:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lesson-plan-second-degree-equation/ssssswlh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lesson-plan-second-degree-equation/ssssswlh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lesson-plan-second-degree-equation/ssssswlh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lesson-plan-second-degree-equation/ssssswlh"/>
      <lastmod>2026-11-02T17:44:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lesson-plan-second-degree-equation/ssssswlh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lesson-plan-second-degree-equation/ssssswlh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lesson-plan-second-degree-equation/ssssswlh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lesson-plan-second-degree-equation/ssssswlh"/>
      <lastmod>2026-11-02T17:44:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/move-point-to-coordinates/ssssswlt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/move-point-to-coordinates/ssssswlt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/move-point-to-coordinates/ssssswlt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/move-point-to-coordinates/ssssswlt"/>
      <lastmod>2026-11-02T12:00:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/move-point-to-coordinates/ssssswlt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/move-point-to-coordinates/ssssswlt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/move-point-to-coordinates/ssssswlt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/move-point-to-coordinates/ssssswlt"/>
      <lastmod>2026-11-02T12:00:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vectors-1/ssssswlx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-1/ssssswlx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-1/ssssswlx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-1/ssssswlx"/>
      <lastmod>2026-11-01T21:31:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vectors-1/ssssswlx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-1/ssssswlx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-1/ssssswlx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-1/ssssswlx"/>
      <lastmod>2026-11-01T21:31:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exact-values-on-the-unit-circle-radians-by-hans-lehman/ssssswli</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exact-values-on-the-unit-circle-radians-by-hans-lehman/ssssswli"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exact-values-on-the-unit-circle-radians-by-hans-lehman/ssssswli"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exact-values-on-the-unit-circle-radians-by-hans-lehman/ssssswli"/>
      <lastmod>2026-11-02T16:37:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exact-values-on-the-unit-circle-radians-by-hans-lehman/ssssswli</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exact-values-on-the-unit-circle-radians-by-hans-lehman/ssssswli"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exact-values-on-the-unit-circle-radians-by-hans-lehman/ssssswli"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exact-values-on-the-unit-circle-radians-by-hans-lehman/ssssswli"/>
      <lastmod>2026-11-02T16:37:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-net/ssssswlo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-net/ssssswlo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-net/ssssswlo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-net/ssssswlo"/>
      <lastmod>2026-11-01T21:22:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-net/ssssswlo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-net/ssssswlo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-net/ssssswlo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-net/ssssswlo"/>
      <lastmod>2026-11-01T21:22:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/phantom-graphs-newton-s-diverging-parabolas/ssssswys</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graphs-newton-s-diverging-parabolas/ssssswys"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graphs-newton-s-diverging-parabolas/ssssswys"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graphs-newton-s-diverging-parabolas/ssssswys"/>
      <lastmod>2026-11-02T03:02:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/phantom-graphs-newton-s-diverging-parabolas/ssssswys</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graphs-newton-s-diverging-parabolas/ssssswys"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graphs-newton-s-diverging-parabolas/ssssswys"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graphs-newton-s-diverging-parabolas/ssssswys"/>
      <lastmod>2026-11-02T03:02:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/v-pantaloni-chord-problem-dynamic-geometry/ssssswy7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/v-pantaloni-chord-problem-dynamic-geometry/ssssswy7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/v-pantaloni-chord-problem-dynamic-geometry/ssssswy7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/v-pantaloni-chord-problem-dynamic-geometry/ssssswy7"/>
      <lastmod>2026-11-02T18:23:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/v-pantaloni-chord-problem-dynamic-geometry/ssssswy7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/v-pantaloni-chord-problem-dynamic-geometry/ssssswy7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/v-pantaloni-chord-problem-dynamic-geometry/ssssswy7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/v-pantaloni-chord-problem-dynamic-geometry/ssssswy7"/>
      <lastmod>2026-11-02T18:23:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-revolution-washers-with-variable-axis/ssssswyn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-washers-with-variable-axis/ssssswyn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-washers-with-variable-axis/ssssswyn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-washers-with-variable-axis/ssssswyn"/>
      <lastmod>2026-11-02T17:04:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-revolution-washers-with-variable-axis/ssssswyn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-washers-with-variable-axis/ssssswyn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-washers-with-variable-axis/ssssswyn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-washers-with-variable-axis/ssssswyn"/>
      <lastmod>2026-11-02T17:04:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-nets-rotation/ssssswy2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-nets-rotation/ssssswy2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-nets-rotation/ssssswy2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-nets-rotation/ssssswy2"/>
      <lastmod>2026-11-01T22:01:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-nets-rotation/ssssswy2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-nets-rotation/ssssswy2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-nets-rotation/ssssswy2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-nets-rotation/ssssswy2"/>
      <lastmod>2026-11-01T22:01:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-8-4-8-lesson-how-many-solutions/ssssswyk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-8-4-8-lesson-how-many-solutions/ssssswyk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-8-4-8-lesson-how-many-solutions/ssssswyk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-8-4-8-lesson-how-many-solutions/ssssswyk"/>
      <lastmod>2026-11-01T22:58:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-8-4-8-lesson-how-many-solutions/ssssswyk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-8-4-8-lesson-how-many-solutions/ssssswyk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-8-4-8-lesson-how-many-solutions/ssssswyk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-8-4-8-lesson-how-many-solutions/ssssswyk"/>
      <lastmod>2026-11-01T22:58:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/investigating-h-dynamic-cube-and-prism-geometry/ssssswyz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-h-dynamic-cube-and-prism-geometry/ssssswyz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-h-dynamic-cube-and-prism-geometry/ssssswyz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-h-dynamic-cube-and-prism-geometry/ssssswyz"/>
      <lastmod>2026-11-02T18:13:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/investigating-h-dynamic-cube-and-prism-geometry/ssssswyz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-h-dynamic-cube-and-prism-geometry/ssssswyz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-h-dynamic-cube-and-prism-geometry/ssssswyz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-h-dynamic-cube-and-prism-geometry/ssssswyz"/>
      <lastmod>2026-11-02T18:13:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/phantom-graph-of-cos-x-2-2/ssssswy0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-of-cos-x-2-2/ssssswy0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-of-cos-x-2-2/ssssswy0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-of-cos-x-2-2/ssssswy0"/>
      <lastmod>2026-11-02T03:07:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/phantom-graph-of-cos-x-2-2/ssssswy0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-of-cos-x-2-2/ssssswy0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-of-cos-x-2-2/ssssswy0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-of-cos-x-2-2/ssssswy0"/>
      <lastmod>2026-11-02T03:07:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/activity-7-solving-for-sides-in-right-triangles-with-feedback/ssssswyd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/activity-7-solving-for-sides-in-right-triangles-with-feedback/ssssswyd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/activity-7-solving-for-sides-in-right-triangles-with-feedback/ssssswyd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/activity-7-solving-for-sides-in-right-triangles-with-feedback/ssssswyd"/>
      <lastmod>2026-11-01T21:28:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/activity-7-solving-for-sides-in-right-triangles-with-feedback/ssssswyd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/activity-7-solving-for-sides-in-right-triangles-with-feedback/ssssswyd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/activity-7-solving-for-sides-in-right-triangles-with-feedback/ssssswyd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/activity-7-solving-for-sides-in-right-triangles-with-feedback/ssssswyd"/>
      <lastmod>2026-11-01T21:28:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/heron-s-formula-for-area-and-inradius/ssssswyf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/heron-s-formula-for-area-and-inradius/ssssswyf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/heron-s-formula-for-area-and-inradius/ssssswyf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/heron-s-formula-for-area-and-inradius/ssssswyf"/>
      <lastmod>2026-11-02T17:03:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/heron-s-formula-for-area-and-inradius/ssssswyf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/heron-s-formula-for-area-and-inradius/ssssswyf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/heron-s-formula-for-area-and-inradius/ssssswyf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/heron-s-formula-for-area-and-inradius/ssssswyf"/>
      <lastmod>2026-11-02T17:03:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualize-measures-of-center-and-spread-box-plot/ssssswy8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualize-measures-of-center-and-spread-box-plot/ssssswy8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualize-measures-of-center-and-spread-box-plot/ssssswy8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualize-measures-of-center-and-spread-box-plot/ssssswy8"/>
      <lastmod>2026-11-01T22:04:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualize-measures-of-center-and-spread-box-plot/ssssswy8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualize-measures-of-center-and-spread-box-plot/ssssswy8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualize-measures-of-center-and-spread-box-plot/ssssswy8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualize-measures-of-center-and-spread-box-plot/ssssswy8"/>
      <lastmod>2026-11-01T22:04:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proof-of-the-law-of-sines-by-albert-navetta/ssssswyu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-the-law-of-sines-by-albert-navetta/ssssswyu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-the-law-of-sines-by-albert-navetta/ssssswyu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-the-law-of-sines-by-albert-navetta/ssssswyu"/>
      <lastmod>2026-11-01T21:32:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proof-of-the-law-of-sines-by-albert-navetta/ssssswyu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proof-of-the-law-of-sines-by-albert-navetta/ssssswyu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proof-of-the-law-of-sines-by-albert-navetta/ssssswyu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proof-of-the-law-of-sines-by-albert-navetta/ssssswyu"/>
      <lastmod>2026-11-01T21:32:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/input-and-output-of-linear-functions-interactive-graph-demo/ssssswy5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/input-and-output-of-linear-functions-interactive-graph-demo/ssssswy5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/input-and-output-of-linear-functions-interactive-graph-demo/ssssswy5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/input-and-output-of-linear-functions-interactive-graph-demo/ssssswy5"/>
      <lastmod>2026-11-02T17:45:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/input-and-output-of-linear-functions-interactive-graph-demo/ssssswy5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/input-and-output-of-linear-functions-interactive-graph-demo/ssssswy5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/input-and-output-of-linear-functions-interactive-graph-demo/ssssswy5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/input-and-output-of-linear-functions-interactive-graph-demo/ssssswy5"/>
      <lastmod>2026-11-02T17:45:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-transformations-and-probability/ssssswyb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-probability/ssssswyb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-and-probability/ssssswyb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-probability/ssssswyb"/>
      <lastmod>2026-11-02T03:07:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-transformations-and-probability/ssssswyb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-probability/ssssswyb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-and-probability/ssssswyb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-probability/ssssswyb"/>
      <lastmod>2026-11-02T03:07:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wave-equation-demonstration/ssssswy3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wave-equation-demonstration/ssssswy3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wave-equation-demonstration/ssssswy3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wave-equation-demonstration/ssssswy3"/>
      <lastmod>2026-11-02T18:48:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wave-equation-demonstration/ssssswy3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wave-equation-demonstration/ssssswy3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wave-equation-demonstration/ssssswy3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wave-equation-demonstration/ssssswy3"/>
      <lastmod>2026-11-02T18:48:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/coronavirus-outbreak-model/ssssswyq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coronavirus-outbreak-model/ssssswyq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coronavirus-outbreak-model/ssssswyq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coronavirus-outbreak-model/ssssswyq"/>
      <lastmod>2026-11-01T19:24:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/coronavirus-outbreak-model/ssssswyq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/coronavirus-outbreak-model/ssssswyq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/coronavirus-outbreak-model/ssssswyq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/coronavirus-outbreak-model/ssssswyq"/>
      <lastmod>2026-11-01T19:24:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-equations-nature-of-roots/ssssswy1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-equations-nature-of-roots/ssssswy1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-equations-nature-of-roots/ssssswy1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-equations-nature-of-roots/ssssswy1"/>
      <lastmod>2026-11-01T21:35:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-equations-nature-of-roots/ssssswy1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-equations-nature-of-roots/ssssswy1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-equations-nature-of-roots/ssssswy1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-equations-nature-of-roots/ssssswy1"/>
      <lastmod>2026-11-01T21:35:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphical-solution-of-linear-equations/ssssswym</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-solution-of-linear-equations/ssssswym"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-solution-of-linear-equations/ssssswym"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-solution-of-linear-equations/ssssswym"/>
      <lastmod>2026-11-02T16:33:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphical-solution-of-linear-equations/ssssswym</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphical-solution-of-linear-equations/ssssswym"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphical-solution-of-linear-equations/ssssswym"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphical-solution-of-linear-equations/ssssswym"/>
      <lastmod>2026-11-02T16:33:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rise-run-revamped-interactive-slope-exploration/ssssswyj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rise-run-revamped-interactive-slope-exploration/ssssswyj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rise-run-revamped-interactive-slope-exploration/ssssswyj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rise-run-revamped-interactive-slope-exploration/ssssswyj"/>
      <lastmod>2026-11-01T21:21:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rise-run-revamped-interactive-slope-exploration/ssssswyj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rise-run-revamped-interactive-slope-exploration/ssssswyj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rise-run-revamped-interactive-slope-exploration/ssssswyj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rise-run-revamped-interactive-slope-exploration/ssssswyj"/>
      <lastmod>2026-11-01T21:21:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/from-cylinder-to-sphere-a-geometric-transformation-demo/ssssswyp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/from-cylinder-to-sphere-a-geometric-transformation-demo/ssssswyp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/from-cylinder-to-sphere-a-geometric-transformation-demo/ssssswyp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/from-cylinder-to-sphere-a-geometric-transformation-demo/ssssswyp"/>
      <lastmod>2026-11-02T10:52:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/from-cylinder-to-sphere-a-geometric-transformation-demo/ssssswyp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/from-cylinder-to-sphere-a-geometric-transformation-demo/ssssswyp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/from-cylinder-to-sphere-a-geometric-transformation-demo/ssssswyp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/from-cylinder-to-sphere-a-geometric-transformation-demo/ssssswyp"/>
      <lastmod>2026-11-02T10:52:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-in-sphere/ssssswyw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-in-sphere/ssssswyw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-in-sphere/ssssswyw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-in-sphere/ssssswyw"/>
      <lastmod>2026-11-02T08:42:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-in-sphere/ssssswyw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-in-sphere/ssssswyw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-in-sphere/ssssswyw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-in-sphere/ssssswyw"/>
      <lastmod>2026-11-02T08:42:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-resolution/ssssswy6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-resolution/ssssswy6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-resolution/ssssswy6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-resolution/ssssswy6"/>
      <lastmod>2026-11-01T19:15:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-resolution/ssssswy6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-resolution/ssssswy6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-resolution/ssssswy6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-resolution/ssssswy6"/>
      <lastmod>2026-11-01T19:15:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/explanation-of-line-equations-through-the-origin/ssssswyg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explanation-of-line-equations-through-the-origin/ssssswyg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explanation-of-line-equations-through-the-origin/ssssswyg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explanation-of-line-equations-through-the-origin/ssssswyg"/>
      <lastmod>2026-11-01T23:44:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/explanation-of-line-equations-through-the-origin/ssssswyg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/explanation-of-line-equations-through-the-origin/ssssswyg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/explanation-of-line-equations-through-the-origin/ssssswyg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/explanation-of-line-equations-through-the-origin/ssssswyg"/>
      <lastmod>2026-11-01T23:44:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integer-multiplication-visualization/ssssswy9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-multiplication-visualization/ssssswy9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-multiplication-visualization/ssssswy9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-multiplication-visualization/ssssswy9"/>
      <lastmod>2026-11-02T09:15:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integer-multiplication-visualization/ssssswy9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integer-multiplication-visualization/ssssswy9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integer-multiplication-visualization/ssssswy9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integer-multiplication-visualization/ssssswy9"/>
      <lastmod>2026-11-02T09:15:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/root-functions/ssssswye</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/root-functions/ssssswye"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/root-functions/ssssswye"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/root-functions/ssssswye"/>
      <lastmod>2026-11-02T15:48:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/root-functions/ssssswye</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/root-functions/ssssswye"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/root-functions/ssssswye"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/root-functions/ssssswye"/>
      <lastmod>2026-11-02T15:48:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-rounding/ssssswyv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-rounding/ssssswyv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-rounding/ssssswyv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-rounding/ssssswyv"/>
      <lastmod>2026-11-02T18:42:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-rounding/ssssswyv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-rounding/ssssswyv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-rounding/ssssswyv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-rounding/ssssswyv"/>
      <lastmod>2026-11-02T18:42:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ultimate-symmetry-in-cone-sphere-system/ssssswy4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ultimate-symmetry-in-cone-sphere-system/ssssswy4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ultimate-symmetry-in-cone-sphere-system/ssssswy4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ultimate-symmetry-in-cone-sphere-system/ssssswy4"/>
      <lastmod>2026-11-01T22:04:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ultimate-symmetry-in-cone-sphere-system/ssssswy4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ultimate-symmetry-in-cone-sphere-system/ssssswy4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ultimate-symmetry-in-cone-sphere-system/ssssswy4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ultimate-symmetry-in-cone-sphere-system/ssssswy4"/>
      <lastmod>2026-11-01T22:04:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-fns-about-yaxis-surface-function-analogue/ssssswyl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-fns-about-yaxis-surface-function-analogue/ssssswyl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-fns-about-yaxis-surface-function-analogue/ssssswyl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-fns-about-yaxis-surface-function-analogue/ssssswyl"/>
      <lastmod>2026-11-01T21:21:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-fns-about-yaxis-surface-function-analogue/ssssswyl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-fns-about-yaxis-surface-function-analogue/ssssswyl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-fns-about-yaxis-surface-function-analogue/ssssswyl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-fns-about-yaxis-surface-function-analogue/ssssswyl"/>
      <lastmod>2026-11-01T21:21:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/three-planes/ssssswyy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-planes/ssssswyy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-planes/ssssswyy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-planes/ssssswyy"/>
      <lastmod>2026-11-02T16:31:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/three-planes/ssssswyy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-planes/ssssswyy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-planes/ssssswyy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-planes/ssssswyy"/>
      <lastmod>2026-11-02T16:31:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-cross-product-demonstration/ssssswya</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-cross-product-demonstration/ssssswya"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-cross-product-demonstration/ssssswya"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-cross-product-demonstration/ssssswya"/>
      <lastmod>2026-11-01T19:07:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-cross-product-demonstration/ssssswya</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-cross-product-demonstration/ssssswya"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-cross-product-demonstration/ssssswya"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-cross-product-demonstration/ssssswya"/>
      <lastmod>2026-11-01T19:07:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/phantom-graph-of-kampyle-of-eudoxus/ssssswyc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-of-kampyle-of-eudoxus/ssssswyc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-of-kampyle-of-eudoxus/ssssswyc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-of-kampyle-of-eudoxus/ssssswyc"/>
      <lastmod>2026-11-02T18:29:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/phantom-graph-of-kampyle-of-eudoxus/ssssswyc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/phantom-graph-of-kampyle-of-eudoxus/ssssswyc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/phantom-graph-of-kampyle-of-eudoxus/ssssswyc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/phantom-graph-of-kampyle-of-eudoxus/ssssswyc"/>
      <lastmod>2026-11-02T18:29:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-function-inequality-demo/ssssswyr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-function-inequality-demo/ssssswyr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-function-inequality-demo/ssssswyr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-function-inequality-demo/ssssswyr"/>
      <lastmod>2026-11-02T15:15:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-function-inequality-demo/ssssswyr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-function-inequality-demo/ssssswyr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-function-inequality-demo/ssssswyr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-function-inequality-demo/ssssswyr"/>
      <lastmod>2026-11-02T15:15:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-multiplication-commutative-law/ssssswyh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-multiplication-commutative-law/ssssswyh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-multiplication-commutative-law/ssssswyh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-multiplication-commutative-law/ssssswyh"/>
      <lastmod>2026-11-01T20:40:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-multiplication-commutative-law/ssssswyh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-multiplication-commutative-law/ssssswyh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-multiplication-commutative-law/ssssswyh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-multiplication-commutative-law/ssssswyh"/>
      <lastmod>2026-11-01T20:40:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drawing-triangles/ssssswyt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-triangles/ssssswyt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-triangles/ssssswyt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-triangles/ssssswyt"/>
      <lastmod>2026-11-02T17:16:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drawing-triangles/ssssswyt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-triangles/ssssswyt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-triangles/ssssswyt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-triangles/ssssswyt"/>
      <lastmod>2026-11-02T17:16:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dr-fisher-s-exponents-game-level-3/ssssswyx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dr-fisher-s-exponents-game-level-3/ssssswyx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dr-fisher-s-exponents-game-level-3/ssssswyx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dr-fisher-s-exponents-game-level-3/ssssswyx"/>
      <lastmod>2026-11-01T19:38:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dr-fisher-s-exponents-game-level-3/ssssswyx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dr-fisher-s-exponents-game-level-3/ssssswyx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dr-fisher-s-exponents-game-level-3/ssssswyx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dr-fisher-s-exponents-game-level-3/ssssswyx"/>
      <lastmod>2026-11-01T19:38:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-exploration-by-emm191/ssssswyi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-exploration-by-emm191/ssssswyi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-exploration-by-emm191/ssssswyi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-exploration-by-emm191/ssssswyi"/>
      <lastmod>2026-11-02T12:08:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-exploration-by-emm191/ssssswyi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-exploration-by-emm191/ssssswyi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-exploration-by-emm191/ssssswyi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-exploration-by-emm191/ssssswyi"/>
      <lastmod>2026-11-02T12:08:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/line-segment-slope-demo/ssssswyo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-segment-slope-demo/ssssswyo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-segment-slope-demo/ssssswyo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-segment-slope-demo/ssssswyo"/>
      <lastmod>2026-11-02T16:53:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/line-segment-slope-demo/ssssswyo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/line-segment-slope-demo/ssssswyo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/line-segment-slope-demo/ssssswyo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/line-segment-slope-demo/ssssswyo"/>
      <lastmod>2026-11-02T16:53:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-revolution-discussion-by-lee-w-fisher/ssssswas</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-discussion-by-lee-w-fisher/ssssswas"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-discussion-by-lee-w-fisher/ssssswas"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-discussion-by-lee-w-fisher/ssssswas"/>
      <lastmod>2026-11-02T17:54:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-revolution-discussion-by-lee-w-fisher/ssssswas</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-revolution-discussion-by-lee-w-fisher/ssssswas"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-revolution-discussion-by-lee-w-fisher/ssssswas"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-revolution-discussion-by-lee-w-fisher/ssssswas"/>
      <lastmod>2026-11-02T17:54:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-equation-of-a-line-and-intersection-of-lines/ssssswa7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-equation-of-a-line-and-intersection-of-lines/ssssswa7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-equation-of-a-line-and-intersection-of-lines/ssssswa7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-equation-of-a-line-and-intersection-of-lines/ssssswa7"/>
      <lastmod>2026-11-02T17:47:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-equation-of-a-line-and-intersection-of-lines/ssssswa7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-equation-of-a-line-and-intersection-of-lines/ssssswa7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-equation-of-a-line-and-intersection-of-lines/ssssswa7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-equation-of-a-line-and-intersection-of-lines/ssssswa7"/>
      <lastmod>2026-11-02T17:47:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spiraling-cube-faces/ssssswan</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiraling-cube-faces/ssssswan"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiraling-cube-faces/ssssswan"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiraling-cube-faces/ssssswan"/>
      <lastmod>2026-11-02T08:45:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spiraling-cube-faces/ssssswan</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiraling-cube-faces/ssssswan"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiraling-cube-faces/ssssswan"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiraling-cube-faces/ssssswan"/>
      <lastmod>2026-11-02T08:45:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-absolute-value-equations/ssssswa2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-absolute-value-equations/ssssswa2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-absolute-value-equations/ssssswa2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-absolute-value-equations/ssssswa2"/>
      <lastmod>2026-11-01T21:30:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-absolute-value-equations/ssssswa2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-absolute-value-equations/ssssswa2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-absolute-value-equations/ssssswa2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-absolute-value-equations/ssssswa2"/>
      <lastmod>2026-11-01T21:30:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/measuring-the-unit-circle/ssssswak</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/measuring-the-unit-circle/ssssswak"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/measuring-the-unit-circle/ssssswak"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/measuring-the-unit-circle/ssssswak"/>
      <lastmod>2026-11-02T16:32:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/measuring-the-unit-circle/ssssswak</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/measuring-the-unit-circle/ssssswak"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/measuring-the-unit-circle/ssssswak"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/measuring-the-unit-circle/ssssswak"/>
      <lastmod>2026-11-02T16:32:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-midsegment-dynamic-demo/ssssswaz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-midsegment-dynamic-demo/ssssswaz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-midsegment-dynamic-demo/ssssswaz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-midsegment-dynamic-demo/ssssswaz"/>
      <lastmod>2026-11-02T17:55:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-midsegment-dynamic-demo/ssssswaz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-midsegment-dynamic-demo/ssssswaz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-midsegment-dynamic-demo/ssssswaz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-midsegment-dynamic-demo/ssssswaz"/>
      <lastmod>2026-11-02T17:55:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/repeated-sampling-with-sample-sizes-3-to-15/ssssswa0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/repeated-sampling-with-sample-sizes-3-to-15/ssssswa0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/repeated-sampling-with-sample-sizes-3-to-15/ssssswa0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/repeated-sampling-with-sample-sizes-3-to-15/ssssswa0"/>
      <lastmod>2026-11-02T17:07:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/repeated-sampling-with-sample-sizes-3-to-15/ssssswa0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/repeated-sampling-with-sample-sizes-3-to-15/ssssswa0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/repeated-sampling-with-sample-sizes-3-to-15/ssssswa0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/repeated-sampling-with-sample-sizes-3-to-15/ssssswa0"/>
      <lastmod>2026-11-02T17:07:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-with-incircle-and-similar-triangles-exploration/ssssswad</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-with-incircle-and-similar-triangles-exploration/ssssswad"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-with-incircle-and-similar-triangles-exploration/ssssswad"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-with-incircle-and-similar-triangles-exploration/ssssswad"/>
      <lastmod>2026-11-01T21:17:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-with-incircle-and-similar-triangles-exploration/ssssswad</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-with-incircle-and-similar-triangles-exploration/ssssswad"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-with-incircle-and-similar-triangles-exploration/ssssswad"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-with-incircle-and-similar-triangles-exploration/ssssswad"/>
      <lastmod>2026-11-01T21:17:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/local-rate-of-change-of-a-parabola-approximating-tangent-slope/ssssswaf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/local-rate-of-change-of-a-parabola-approximating-tangent-slope/ssssswaf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/local-rate-of-change-of-a-parabola-approximating-tangent-slope/ssssswaf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/local-rate-of-change-of-a-parabola-approximating-tangent-slope/ssssswaf"/>
      <lastmod>2026-11-01T19:21:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/local-rate-of-change-of-a-parabola-approximating-tangent-slope/ssssswaf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/local-rate-of-change-of-a-parabola-approximating-tangent-slope/ssssswaf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/local-rate-of-change-of-a-parabola-approximating-tangent-slope/ssssswaf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/local-rate-of-change-of-a-parabola-approximating-tangent-slope/ssssswaf"/>
      <lastmod>2026-11-01T19:21:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle/ssssswa8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle/ssssswa8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle/ssssswa8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle/ssssswa8"/>
      <lastmod>2026-11-02T09:32:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle/ssssswa8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle/ssssswa8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle/ssssswa8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle/ssssswa8"/>
      <lastmod>2026-11-02T09:32:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-by-folding/ssssswau</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-by-folding/ssssswau"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-by-folding/ssssswau"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-by-folding/ssssswau"/>
      <lastmod>2026-11-02T13:36:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-by-folding/ssssswau</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-by-folding/ssssswau"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-by-folding/ssssswau"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-by-folding/ssssswau"/>
      <lastmod>2026-11-02T13:36:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-annulus-section-using-inequalities/ssssswa5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-annulus-section-using-inequalities/ssssswa5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-annulus-section-using-inequalities/ssssswa5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-annulus-section-using-inequalities/ssssswa5"/>
      <lastmod>2026-11-01T21:22:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-annulus-section-using-inequalities/ssssswa5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-annulus-section-using-inequalities/ssssswa5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-annulus-section-using-inequalities/ssssswa5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-annulus-section-using-inequalities/ssssswa5"/>
      <lastmod>2026-11-01T21:22:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-fraction/ssssswab</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-fraction/ssssswab"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-fraction/ssssswab"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-fraction/ssssswab"/>
      <lastmod>2026-11-01T21:21:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-fraction/ssssswab</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-fraction/ssssswab"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-fraction/ssssswab"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-fraction/ssssswab"/>
      <lastmod>2026-11-01T21:21:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-function-demo/ssssswa3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-function-demo/ssssswa3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-function-demo/ssssswa3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-function-demo/ssssswa3"/>
      <lastmod>2026-11-02T18:09:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-function-demo/ssssswa3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-function-demo/ssssswa3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-function-demo/ssssswa3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-function-demo/ssssswa3"/>
      <lastmod>2026-11-02T18:09:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quickly-find-the-cross-product-of-two-vectors/ssssswaq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quickly-find-the-cross-product-of-two-vectors/ssssswaq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quickly-find-the-cross-product-of-two-vectors/ssssswaq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quickly-find-the-cross-product-of-two-vectors/ssssswaq"/>
      <lastmod>2026-11-02T18:54:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quickly-find-the-cross-product-of-two-vectors/ssssswaq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quickly-find-the-cross-product-of-two-vectors/ssssswaq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quickly-find-the-cross-product-of-two-vectors/ssssswaq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quickly-find-the-cross-product-of-two-vectors/ssssswaq"/>
      <lastmod>2026-11-02T18:54:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-proof-of-the-pythagorean-theorem/ssssswa1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-the-pythagorean-theorem/ssssswa1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-proof-of-the-pythagorean-theorem/ssssswa1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-the-pythagorean-theorem/ssssswa1"/>
      <lastmod>2026-11-01T23:11:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-proof-of-the-pythagorean-theorem/ssssswa1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-the-pythagorean-theorem/ssssswa1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-proof-of-the-pythagorean-theorem/ssssswa1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-the-pythagorean-theorem/ssssswa1"/>
      <lastmod>2026-11-01T23:11:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/star-reflections/ssssswam</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/star-reflections/ssssswam"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/star-reflections/ssssswam"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/star-reflections/ssssswam"/>
      <lastmod>2026-11-01T21:16:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/star-reflections/ssssswam</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/star-reflections/ssssswam"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/star-reflections/ssssswam"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/star-reflections/ssssswam"/>
      <lastmod>2026-11-01T21:16:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-ssa-congruent-triangles/ssssswaj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-ssa-congruent-triangles/ssssswaj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-ssa-congruent-triangles/ssssswaj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-ssa-congruent-triangles/ssssswaj"/>
      <lastmod>2026-11-01T19:17:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-ssa-congruent-triangles/ssssswaj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-ssa-congruent-triangles/ssssswaj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-ssa-congruent-triangles/ssssswaj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-ssa-congruent-triangles/ssssswaj"/>
      <lastmod>2026-11-01T19:17:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polynomial-equations-inequalities/ssssswap</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-equations-inequalities/ssssswap"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-equations-inequalities/ssssswap"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-equations-inequalities/ssssswap"/>
      <lastmod>2026-11-02T17:56:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polynomial-equations-inequalities/ssssswap</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-equations-inequalities/ssssswap"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-equations-inequalities/ssssswap"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-equations-inequalities/ssssswap"/>
      <lastmod>2026-11-02T17:56:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-nets-of-solids/ssssswaw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-nets-of-solids/ssssswaw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-nets-of-solids/ssssswaw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-nets-of-solids/ssssswaw"/>
      <lastmod>2026-11-02T18:16:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-nets-of-solids/ssssswaw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-nets-of-solids/ssssswaw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-nets-of-solids/ssssswaw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-nets-of-solids/ssssswaw"/>
      <lastmod>2026-11-02T18:16:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-with-semicircular-cross-sections/ssssswa6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-with-semicircular-cross-sections/ssssswa6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-with-semicircular-cross-sections/ssssswa6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-with-semicircular-cross-sections/ssssswa6"/>
      <lastmod>2026-11-01T23:30:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-with-semicircular-cross-sections/ssssswa6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-with-semicircular-cross-sections/ssssswa6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-with-semicircular-cross-sections/ssssswa6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-with-semicircular-cross-sections/ssssswa6"/>
      <lastmod>2026-11-01T23:30:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-by-yue-chang/ssssswag</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-by-yue-chang/ssssswag"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-by-yue-chang/ssssswag"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-by-yue-chang/ssssswag"/>
      <lastmod>2026-11-01T21:55:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-by-yue-chang/ssssswag</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-by-yue-chang/ssssswag"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-by-yue-chang/ssssswag"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-by-yue-chang/ssssswag"/>
      <lastmod>2026-11-01T21:55:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/harmonic-addition-1-by-graeme-mcrae-2/ssssswa9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/harmonic-addition-1-by-graeme-mcrae-2/ssssswa9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/harmonic-addition-1-by-graeme-mcrae-2/ssssswa9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/harmonic-addition-1-by-graeme-mcrae-2/ssssswa9"/>
      <lastmod>2026-11-02T17:52:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/harmonic-addition-1-by-graeme-mcrae-2/ssssswa9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/harmonic-addition-1-by-graeme-mcrae-2/ssssswa9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/harmonic-addition-1-by-graeme-mcrae-2/ssssswa9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/harmonic-addition-1-by-graeme-mcrae-2/ssssswa9"/>
      <lastmod>2026-11-02T17:52:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-translations-by-james-fields/ssssswae</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-translations-by-james-fields/ssssswae"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-translations-by-james-fields/ssssswae"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-translations-by-james-fields/ssssswae"/>
      <lastmod>2026-11-02T11:52:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-translations-by-james-fields/ssssswae</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-translations-by-james-fields/ssssswae"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-translations-by-james-fields/ssssswae"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-translations-by-james-fields/ssssswae"/>
      <lastmod>2026-11-02T11:52:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/task-11-reflections/ssssswav</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/task-11-reflections/ssssswav"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/task-11-reflections/ssssswav"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/task-11-reflections/ssssswav"/>
      <lastmod>2026-11-02T17:18:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/task-11-reflections/ssssswav</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/task-11-reflections/ssssswav"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/task-11-reflections/ssssswav"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/task-11-reflections/ssssswav"/>
      <lastmod>2026-11-02T17:18:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logarithmic-inequalities-dynamic-solving-and-graphical-visualization/ssssswa4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-inequalities-dynamic-solving-and-graphical-visualization/ssssswa4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-inequalities-dynamic-solving-and-graphical-visualization/ssssswa4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-inequalities-dynamic-solving-and-graphical-visualization/ssssswa4"/>
      <lastmod>2026-11-01T19:05:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logarithmic-inequalities-dynamic-solving-and-graphical-visualization/ssssswa4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logarithmic-inequalities-dynamic-solving-and-graphical-visualization/ssssswa4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logarithmic-inequalities-dynamic-solving-and-graphical-visualization/ssssswa4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logarithmic-inequalities-dynamic-solving-and-graphical-visualization/ssssswa4"/>
      <lastmod>2026-11-01T19:05:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/change-of-base-for-logarithms-demo/ssssswal</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/change-of-base-for-logarithms-demo/ssssswal"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/change-of-base-for-logarithms-demo/ssssswal"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/change-of-base-for-logarithms-demo/ssssswal"/>
      <lastmod>2026-11-02T02:37:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/change-of-base-for-logarithms-demo/ssssswal</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/change-of-base-for-logarithms-demo/ssssswal"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/change-of-base-for-logarithms-demo/ssssswal"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/change-of-base-for-logarithms-demo/ssssswal"/>
      <lastmod>2026-11-02T02:37:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simple-example-with-four-points/sssssway</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-example-with-four-points/sssssway"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-example-with-four-points/sssssway"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-example-with-four-points/sssssway"/>
      <lastmod>2026-11-02T17:36:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simple-example-with-four-points/sssssway</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simple-example-with-four-points/sssssway"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simple-example-with-four-points/sssssway"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simple-example-with-four-points/sssssway"/>
      <lastmod>2026-11-02T17:36:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practice-classifying-rational-numbers-with-arabic-english-french-ui/ssssswaa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-classifying-rational-numbers-with-arabic-english-french-ui/ssssswaa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-classifying-rational-numbers-with-arabic-english-french-ui/ssssswaa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-classifying-rational-numbers-with-arabic-english-french-ui/ssssswaa"/>
      <lastmod>2026-11-02T18:41:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practice-classifying-rational-numbers-with-arabic-english-french-ui/ssssswaa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-classifying-rational-numbers-with-arabic-english-french-ui/ssssswaa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-classifying-rational-numbers-with-arabic-english-french-ui/ssssswaa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-classifying-rational-numbers-with-arabic-english-french-ui/ssssswaa"/>
      <lastmod>2026-11-02T18:41:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/draw-another-line-segment-given-a-line-segment-by-david-wees/ssssswac</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-another-line-segment-given-a-line-segment-by-david-wees/ssssswac"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-another-line-segment-given-a-line-segment-by-david-wees/ssssswac"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-another-line-segment-given-a-line-segment-by-david-wees/ssssswac"/>
      <lastmod>2026-11-02T16:34:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/draw-another-line-segment-given-a-line-segment-by-david-wees/ssssswac</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-another-line-segment-given-a-line-segment-by-david-wees/ssssswac"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-another-line-segment-given-a-line-segment-by-david-wees/ssssswac"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-another-line-segment-given-a-line-segment-by-david-wees/ssssswac"/>
      <lastmod>2026-11-02T16:34:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-x-cylinder-intersection-curve/ssssswar</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-x-cylinder-intersection-curve/ssssswar"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-x-cylinder-intersection-curve/ssssswar"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-x-cylinder-intersection-curve/ssssswar"/>
      <lastmod>2026-11-01T19:30:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-x-cylinder-intersection-curve/ssssswar</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-x-cylinder-intersection-curve/ssssswar"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-x-cylinder-intersection-curve/ssssswar"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-x-cylinder-intersection-curve/ssssswar"/>
      <lastmod>2026-11-01T19:30:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-roots-by-wendy-fresh-2/ssssswah</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-roots-by-wendy-fresh-2/ssssswah"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-roots-by-wendy-fresh-2/ssssswah"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-roots-by-wendy-fresh-2/ssssswah"/>
      <lastmod>2026-11-02T18:39:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-roots-by-wendy-fresh-2/ssssswah</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-roots-by-wendy-fresh-2/ssssswah"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-roots-by-wendy-fresh-2/ssssswah"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-roots-by-wendy-fresh-2/ssssswah"/>
      <lastmod>2026-11-02T18:39:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-through-4-random-points/ssssswat</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-through-4-random-points/ssssswat"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-through-4-random-points/ssssswat"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-through-4-random-points/ssssswat"/>
      <lastmod>2026-11-01T20:59:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-through-4-random-points/ssssswat</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-through-4-random-points/ssssswat"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-through-4-random-points/ssssswat"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-through-4-random-points/ssssswat"/>
      <lastmod>2026-11-01T20:59:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dot-plot-how-a-data-value-affects-statistics-1/ssssswax</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dot-plot-how-a-data-value-affects-statistics-1/ssssswax"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dot-plot-how-a-data-value-affects-statistics-1/ssssswax"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dot-plot-how-a-data-value-affects-statistics-1/ssssswax"/>
      <lastmod>2026-11-02T18:27:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dot-plot-how-a-data-value-affects-statistics-1/ssssswax</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dot-plot-how-a-data-value-affects-statistics-1/ssssswax"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dot-plot-how-a-data-value-affects-statistics-1/ssssswax"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dot-plot-how-a-data-value-affects-statistics-1/ssssswax"/>
      <lastmod>2026-11-02T18:27:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-square-pyramid-formula-hidden/ssssswai</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-square-pyramid-formula-hidden/ssssswai"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-square-pyramid-formula-hidden/ssssswai"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-square-pyramid-formula-hidden/ssssswai"/>
      <lastmod>2026-11-01T19:28:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-a-square-pyramid-formula-hidden/ssssswai</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-square-pyramid-formula-hidden/ssssswai"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-square-pyramid-formula-hidden/ssssswai"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-square-pyramid-formula-hidden/ssssswai"/>
      <lastmod>2026-11-01T19:28:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/roblox-logo-geometric-construction/ssssswao</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roblox-logo-geometric-construction/ssssswao"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roblox-logo-geometric-construction/ssssswao"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roblox-logo-geometric-construction/ssssswao"/>
      <lastmod>2026-11-01T20:40:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/roblox-logo-geometric-construction/ssssswao</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/roblox-logo-geometric-construction/ssssswao"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/roblox-logo-geometric-construction/ssssswao"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/roblox-logo-geometric-construction/ssssswao"/>
      <lastmod>2026-11-01T20:40:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sequence-and-statistics-confidence-interval-example-ow-drecf-0-b/ssssswcs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sequence-and-statistics-confidence-interval-example-ow-drecf-0-b/ssssswcs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sequence-and-statistics-confidence-interval-example-ow-drecf-0-b/ssssswcs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sequence-and-statistics-confidence-interval-example-ow-drecf-0-b/ssssswcs"/>
      <lastmod>2026-11-02T02:53:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sequence-and-statistics-confidence-interval-example-ow-drecf-0-b/ssssswcs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sequence-and-statistics-confidence-interval-example-ow-drecf-0-b/ssssswcs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sequence-and-statistics-confidence-interval-example-ow-drecf-0-b/ssssswcs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sequence-and-statistics-confidence-interval-example-ow-drecf-0-b/ssssswcs"/>
      <lastmod>2026-11-02T02:53:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/playing-with-a-rainbow-dragon/ssssswc7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/playing-with-a-rainbow-dragon/ssssswc7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/playing-with-a-rainbow-dragon/ssssswc7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/playing-with-a-rainbow-dragon/ssssswc7"/>
      <lastmod>2026-11-01T21:15:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/playing-with-a-rainbow-dragon/ssssswc7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/playing-with-a-rainbow-dragon/ssssswc7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/playing-with-a-rainbow-dragon/ssssswc7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/playing-with-a-rainbow-dragon/ssssswc7"/>
      <lastmod>2026-11-01T21:15:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translations-in-the-coordinate-plane/ssssswcn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translations-in-the-coordinate-plane/ssssswcn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translations-in-the-coordinate-plane/ssssswcn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translations-in-the-coordinate-plane/ssssswcn"/>
      <lastmod>2026-11-01T21:14:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translations-in-the-coordinate-plane/ssssswcn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translations-in-the-coordinate-plane/ssssswcn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translations-in-the-coordinate-plane/ssssswcn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translations-in-the-coordinate-plane/ssssswcn"/>
      <lastmod>2026-11-01T21:14:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/series-of-transformations-of-trigonometric-functions/ssssswc2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/series-of-transformations-of-trigonometric-functions/ssssswc2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/series-of-transformations-of-trigonometric-functions/ssssswc2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/series-of-transformations-of-trigonometric-functions/ssssswc2"/>
      <lastmod>2026-11-02T18:21:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/series-of-transformations-of-trigonometric-functions/ssssswc2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/series-of-transformations-of-trigonometric-functions/ssssswc2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/series-of-transformations-of-trigonometric-functions/ssssswc2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/series-of-transformations-of-trigonometric-functions/ssssswc2"/>
      <lastmod>2026-11-02T18:21:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/splitting-a-scalene-triangle-into-two-right-triangles/ssssswck</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/splitting-a-scalene-triangle-into-two-right-triangles/ssssswck"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/splitting-a-scalene-triangle-into-two-right-triangles/ssssswck"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/splitting-a-scalene-triangle-into-two-right-triangles/ssssswck"/>
      <lastmod>2026-11-02T00:33:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/splitting-a-scalene-triangle-into-two-right-triangles/ssssswck</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/splitting-a-scalene-triangle-into-two-right-triangles/ssssswck"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/splitting-a-scalene-triangle-into-two-right-triangles/ssssswck"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/splitting-a-scalene-triangle-into-two-right-triangles/ssssswck"/>
      <lastmod>2026-11-02T00:33:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/points-on-kiepert-hyperbola/ssssswcz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/points-on-kiepert-hyperbola/ssssswcz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/points-on-kiepert-hyperbola/ssssswcz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/points-on-kiepert-hyperbola/ssssswcz"/>
      <lastmod>2026-11-02T12:42:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/points-on-kiepert-hyperbola/ssssswcz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/points-on-kiepert-hyperbola/ssssswcz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/points-on-kiepert-hyperbola/ssssswcz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/points-on-kiepert-hyperbola/ssssswcz"/>
      <lastmod>2026-11-02T12:42:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/left-rectangle-approximation-for-area-under-a-curve/ssssswc0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/left-rectangle-approximation-for-area-under-a-curve/ssssswc0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/left-rectangle-approximation-for-area-under-a-curve/ssssswc0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/left-rectangle-approximation-for-area-under-a-curve/ssssswc0"/>
      <lastmod>2026-11-02T02:46:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/left-rectangle-approximation-for-area-under-a-curve/ssssswc0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/left-rectangle-approximation-for-area-under-a-curve/ssssswc0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/left-rectangle-approximation-for-area-under-a-curve/ssssswc0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/left-rectangle-approximation-for-area-under-a-curve/ssssswc0"/>
      <lastmod>2026-11-02T02:46:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isogonal-conjugates-euler-line-and-jerabek-hyperbola/ssssswcd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isogonal-conjugates-euler-line-and-jerabek-hyperbola/ssssswcd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isogonal-conjugates-euler-line-and-jerabek-hyperbola/ssssswcd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isogonal-conjugates-euler-line-and-jerabek-hyperbola/ssssswcd"/>
      <lastmod>2026-11-01T23:18:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isogonal-conjugates-euler-line-and-jerabek-hyperbola/ssssswcd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isogonal-conjugates-euler-line-and-jerabek-hyperbola/ssssswcd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isogonal-conjugates-euler-line-and-jerabek-hyperbola/ssssswcd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isogonal-conjugates-euler-line-and-jerabek-hyperbola/ssssswcd"/>
      <lastmod>2026-11-01T23:18:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/qr4-03-p4a-cyu2-graphing-quadratics/ssssswcf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/qr4-03-p4a-cyu2-graphing-quadratics/ssssswcf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/qr4-03-p4a-cyu2-graphing-quadratics/ssssswcf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/qr4-03-p4a-cyu2-graphing-quadratics/ssssswcf"/>
      <lastmod>2026-11-02T02:59:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/qr4-03-p4a-cyu2-graphing-quadratics/ssssswcf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/qr4-03-p4a-cyu2-graphing-quadratics/ssssswcf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/qr4-03-p4a-cyu2-graphing-quadratics/ssssswcf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/qr4-03-p4a-cyu2-graphing-quadratics/ssssswcf"/>
      <lastmod>2026-11-02T02:59:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shannon-s-parabola-of-wonder/ssssswc8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shannon-s-parabola-of-wonder/ssssswc8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shannon-s-parabola-of-wonder/ssssswc8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shannon-s-parabola-of-wonder/ssssswc8"/>
      <lastmod>2026-11-01T21:25:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shannon-s-parabola-of-wonder/ssssswc8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shannon-s-parabola-of-wonder/ssssswc8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shannon-s-parabola-of-wonder/ssssswc8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shannon-s-parabola-of-wonder/ssssswc8"/>
      <lastmod>2026-11-01T21:25:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/checking-congruence-with-geogebra/ssssswcu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/checking-congruence-with-geogebra/ssssswcu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/checking-congruence-with-geogebra/ssssswcu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/checking-congruence-with-geogebra/ssssswcu"/>
      <lastmod>2026-11-01T22:00:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/checking-congruence-with-geogebra/ssssswcu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/checking-congruence-with-geogebra/ssssswcu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/checking-congruence-with-geogebra/ssssswcu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/checking-congruence-with-geogebra/ssssswcu"/>
      <lastmod>2026-11-01T22:00:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drawing-an-elephant-with-four-parameters/ssssswc5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-an-elephant-with-four-parameters/ssssswc5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-an-elephant-with-four-parameters/ssssswc5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-an-elephant-with-four-parameters/ssssswc5"/>
      <lastmod>2026-11-01T19:26:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drawing-an-elephant-with-four-parameters/ssssswc5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drawing-an-elephant-with-four-parameters/ssssswc5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drawing-an-elephant-with-four-parameters/ssssswc5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drawing-an-elephant-with-four-parameters/ssssswc5"/>
      <lastmod>2026-11-01T19:26:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/relationship-between-p-and-a-in-parabola/ssssswcb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relationship-between-p-and-a-in-parabola/ssssswcb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relationship-between-p-and-a-in-parabola/ssssswcb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relationship-between-p-and-a-in-parabola/ssssswcb"/>
      <lastmod>2026-11-02T09:42:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/relationship-between-p-and-a-in-parabola/ssssswcb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relationship-between-p-and-a-in-parabola/ssssswcb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relationship-between-p-and-a-in-parabola/ssssswcb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relationship-between-p-and-a-in-parabola/ssssswcb"/>
      <lastmod>2026-11-02T09:42:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivatives-of-inverse-functions/ssssswc3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivatives-of-inverse-functions/ssssswc3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivatives-of-inverse-functions/ssssswc3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivatives-of-inverse-functions/ssssswc3"/>
      <lastmod>2026-11-02T13:14:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivatives-of-inverse-functions/ssssswc3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivatives-of-inverse-functions/ssssswc3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivatives-of-inverse-functions/ssssswc3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivatives-of-inverse-functions/ssssswc3"/>
      <lastmod>2026-11-02T13:14:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quiz-on-linear-equations-in-standard-form/ssssswcq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-on-linear-equations-in-standard-form/ssssswcq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-on-linear-equations-in-standard-form/ssssswcq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-on-linear-equations-in-standard-form/ssssswcq"/>
      <lastmod>2026-11-02T02:12:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quiz-on-linear-equations-in-standard-form/ssssswcq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-on-linear-equations-in-standard-form/ssssswcq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-on-linear-equations-in-standard-form/ssssswcq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-on-linear-equations-in-standard-form/ssssswcq"/>
      <lastmod>2026-11-02T02:12:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-equation-construction-practice/ssssswc1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-equation-construction-practice/ssssswc1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-equation-construction-practice/ssssswc1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-equation-construction-practice/ssssswc1"/>
      <lastmod>2026-11-02T09:38:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-equation-construction-practice/ssssswc1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-equation-construction-practice/ssssswc1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-equation-construction-practice/ssssswc1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-equation-construction-practice/ssssswc1"/>
      <lastmod>2026-11-02T09:38:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplying-real-numbers/ssssswcm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-real-numbers/ssssswcm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-real-numbers/ssssswcm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-real-numbers/ssssswcm"/>
      <lastmod>2026-11-02T13:15:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplying-real-numbers/ssssswcm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplying-real-numbers/ssssswcm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplying-real-numbers/ssssswcm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplying-real-numbers/ssssswcm"/>
      <lastmod>2026-11-02T13:15:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parametrically-defined-surfaces/ssssswcj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametrically-defined-surfaces/ssssswcj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametrically-defined-surfaces/ssssswcj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametrically-defined-surfaces/ssssswcj"/>
      <lastmod>2026-11-01T23:26:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parametrically-defined-surfaces/ssssswcj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parametrically-defined-surfaces/ssssswcj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parametrically-defined-surfaces/ssssswcj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parametrically-defined-surfaces/ssssswcj"/>
      <lastmod>2026-11-01T23:26:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersecting-planes-by-maria-green/ssssswcp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersecting-planes-by-maria-green/ssssswcp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersecting-planes-by-maria-green/ssssswcp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersecting-planes-by-maria-green/ssssswcp"/>
      <lastmod>2026-11-02T18:53:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersecting-planes-by-maria-green/ssssswcp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersecting-planes-by-maria-green/ssssswcp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersecting-planes-by-maria-green/ssssswcp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersecting-planes-by-maria-green/ssssswcp"/>
      <lastmod>2026-11-02T18:53:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-number-c-0-52-0-57i-geogebra-example/ssssswcw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-c-0-52-0-57i-geogebra-example/ssssswcw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-c-0-52-0-57i-geogebra-example/ssssswcw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-c-0-52-0-57i-geogebra-example/ssssswcw"/>
      <lastmod>2026-11-01T19:37:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-number-c-0-52-0-57i-geogebra-example/ssssswcw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-c-0-52-0-57i-geogebra-example/ssssswcw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-c-0-52-0-57i-geogebra-example/ssssswcw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-c-0-52-0-57i-geogebra-example/ssssswcw"/>
      <lastmod>2026-11-01T19:37:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/classic-open-box-optimization-visualization/ssssswc6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/classic-open-box-optimization-visualization/ssssswc6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/classic-open-box-optimization-visualization/ssssswc6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/classic-open-box-optimization-visualization/ssssswc6"/>
      <lastmod>2026-11-01T21:08:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/classic-open-box-optimization-visualization/ssssswc6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/classic-open-box-optimization-visualization/ssssswc6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/classic-open-box-optimization-visualization/ssssswc6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/classic-open-box-optimization-visualization/ssssswc6"/>
      <lastmod>2026-11-01T21:08:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dodecahedron-sphere-construction/ssssswcg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dodecahedron-sphere-construction/ssssswcg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dodecahedron-sphere-construction/ssssswcg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dodecahedron-sphere-construction/ssssswcg"/>
      <lastmod>2026-11-02T13:34:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dodecahedron-sphere-construction/ssssswcg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dodecahedron-sphere-construction/ssssswcg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dodecahedron-sphere-construction/ssssswcg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dodecahedron-sphere-construction/ssssswcg"/>
      <lastmod>2026-11-02T13:34:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logo-mesut-zil/ssssswc9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logo-mesut-zil/ssssswc9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logo-mesut-zil/ssssswc9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logo-mesut-zil/ssssswc9"/>
      <lastmod>2026-11-01T20:42:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logo-mesut-zil/ssssswc9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logo-mesut-zil/ssssswc9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logo-mesut-zil/ssssswc9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logo-mesut-zil/ssssswc9"/>
      <lastmod>2026-11-01T20:42:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/asa-angle-side-angle-congruence-case-2/ssssswce</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/asa-angle-side-angle-congruence-case-2/ssssswce"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/asa-angle-side-angle-congruence-case-2/ssssswce"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/asa-angle-side-angle-congruence-case-2/ssssswce"/>
      <lastmod>2026-11-01T20:56:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/asa-angle-side-angle-congruence-case-2/ssssswce</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/asa-angle-side-angle-congruence-case-2/ssssswce"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/asa-angle-side-angle-congruence-case-2/ssssswce"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/asa-angle-side-angle-congruence-case-2/ssssswce"/>
      <lastmod>2026-11-01T20:56:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/director-circle-of-a-hyperbola/ssssswcv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/director-circle-of-a-hyperbola/ssssswcv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/director-circle-of-a-hyperbola/ssssswcv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/director-circle-of-a-hyperbola/ssssswcv"/>
      <lastmod>2026-11-02T18:35:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/director-circle-of-a-hyperbola/ssssswcv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/director-circle-of-a-hyperbola/ssssswcv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/director-circle-of-a-hyperbola/ssssswcv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/director-circle-of-a-hyperbola/ssssswcv"/>
      <lastmod>2026-11-02T18:35:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphically-solving-equations-and-inequalities/ssssswc4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphically-solving-equations-and-inequalities/ssssswc4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphically-solving-equations-and-inequalities/ssssswc4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphically-solving-equations-and-inequalities/ssssswc4"/>
      <lastmod>2026-11-02T18:49:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphically-solving-equations-and-inequalities/ssssswc4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphically-solving-equations-and-inequalities/ssssswc4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphically-solving-equations-and-inequalities/ssssswc4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphically-solving-equations-and-inequalities/ssssswc4"/>
      <lastmod>2026-11-02T18:49:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-in-one-point-perspective/ssssswcl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-in-one-point-perspective/ssssswcl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-in-one-point-perspective/ssssswcl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-in-one-point-perspective/ssssswcl"/>
      <lastmod>2026-11-02T02:44:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-in-one-point-perspective/ssssswcl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-in-one-point-perspective/ssssswcl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-in-one-point-perspective/ssssswcl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-in-one-point-perspective/ssssswcl"/>
      <lastmod>2026-11-02T02:44:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/law-of-cosines-demonstration/ssssswcy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-cosines-demonstration/ssssswcy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-cosines-demonstration/ssssswcy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-cosines-demonstration/ssssswcy"/>
      <lastmod>2026-11-02T12:55:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/law-of-cosines-demonstration/ssssswcy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-cosines-demonstration/ssssswcy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-cosines-demonstration/ssssswcy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-cosines-demonstration/ssssswcy"/>
      <lastmod>2026-11-02T12:55:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/limits-and-continuity-exercise-2-1/ssssswca</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-and-continuity-exercise-2-1/ssssswca"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-and-continuity-exercise-2-1/ssssswca"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-and-continuity-exercise-2-1/ssssswca"/>
      <lastmod>2026-11-01T23:49:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/limits-and-continuity-exercise-2-1/ssssswca</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/limits-and-continuity-exercise-2-1/ssssswca"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/limits-and-continuity-exercise-2-1/ssssswca"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/limits-and-continuity-exercise-2-1/ssssswca"/>
      <lastmod>2026-11-01T23:49:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/center-of-dilation-demo/ssssswcc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/center-of-dilation-demo/ssssswcc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/center-of-dilation-demo/ssssswcc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/center-of-dilation-demo/ssssswcc"/>
      <lastmod>2026-11-01T19:13:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/center-of-dilation-demo/ssssswcc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/center-of-dilation-demo/ssssswcc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/center-of-dilation-demo/ssssswcc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/center-of-dilation-demo/ssssswcc"/>
      <lastmod>2026-11-01T19:13:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drag-rational-numbers-to-correct-positions/ssssswcr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drag-rational-numbers-to-correct-positions/ssssswcr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drag-rational-numbers-to-correct-positions/ssssswcr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drag-rational-numbers-to-correct-positions/ssssswcr"/>
      <lastmod>2026-11-01T23:50:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drag-rational-numbers-to-correct-positions/ssssswcr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drag-rational-numbers-to-correct-positions/ssssswcr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drag-rational-numbers-to-correct-positions/ssssswcr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drag-rational-numbers-to-correct-positions/ssssswcr"/>
      <lastmod>2026-11-01T23:50:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/riemann-surface-z-1-2/ssssswch</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-surface-z-1-2/ssssswch"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-surface-z-1-2/ssssswch"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-surface-z-1-2/ssssswch"/>
      <lastmod>2026-11-02T13:01:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/riemann-surface-z-1-2/ssssswch</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/riemann-surface-z-1-2/ssssswch"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/riemann-surface-z-1-2/ssssswch"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/riemann-surface-z-1-2/ssssswch"/>
      <lastmod>2026-11-02T13:01:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/plotting-points-to-form-an-awkward-star/ssssswct</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-points-to-form-an-awkward-star/ssssswct"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-points-to-form-an-awkward-star/ssssswct"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-points-to-form-an-awkward-star/ssssswct"/>
      <lastmod>2026-11-02T12:58:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/plotting-points-to-form-an-awkward-star/ssssswct</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/plotting-points-to-form-an-awkward-star/ssssswct"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/plotting-points-to-form-an-awkward-star/ssssswct"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/plotting-points-to-form-an-awkward-star/ssssswct"/>
      <lastmod>2026-11-02T12:58:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotating-cuboid-by-gabriele-sponheimer-2/ssssswcx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-cuboid-by-gabriele-sponheimer-2/ssssswcx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-cuboid-by-gabriele-sponheimer-2/ssssswcx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-cuboid-by-gabriele-sponheimer-2/ssssswcx"/>
      <lastmod>2026-11-02T08:40:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotating-cuboid-by-gabriele-sponheimer-2/ssssswcx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotating-cuboid-by-gabriele-sponheimer-2/ssssswcx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotating-cuboid-by-gabriele-sponheimer-2/ssssswcx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotating-cuboid-by-gabriele-sponheimer-2/ssssswcx"/>
      <lastmod>2026-11-02T08:40:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-sim-to-sim-non-2/ssssswci</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-sim-to-sim-non-2/ssssswci"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temperature-vs-time-multiplication-sim-to-sim-non-2/ssssswci"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-sim-to-sim-non-2/ssssswci"/>
      <lastmod>2026-11-02T16:37:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/temperature-vs-time-multiplication-sim-to-sim-non-2/ssssswci</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-sim-to-sim-non-2/ssssswci"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temperature-vs-time-multiplication-sim-to-sim-non-2/ssssswci"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-sim-to-sim-non-2/ssssswci"/>
      <lastmod>2026-11-02T16:37:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/optimizing-the-volume-of-an-open-box/ssssswco</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/optimizing-the-volume-of-an-open-box/ssssswco"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/optimizing-the-volume-of-an-open-box/ssssswco"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/optimizing-the-volume-of-an-open-box/ssssswco"/>
      <lastmod>2026-11-02T18:30:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/optimizing-the-volume-of-an-open-box/ssssswco</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/optimizing-the-volume-of-an-open-box/ssssswco"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/optimizing-the-volume-of-an-open-box/ssssswco"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/optimizing-the-volume-of-an-open-box/ssssswco"/>
      <lastmod>2026-11-02T18:30:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tangent-function-and-unit-circle/ssssswrs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-function-and-unit-circle/ssssswrs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-function-and-unit-circle/ssssswrs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-function-and-unit-circle/ssssswrs"/>
      <lastmod>2026-11-01T19:06:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tangent-function-and-unit-circle/ssssswrs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tangent-function-and-unit-circle/ssssswrs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tangent-function-and-unit-circle/ssssswrs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tangent-function-and-unit-circle/ssssswrs"/>
      <lastmod>2026-11-01T19:06:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-linear-functions-slope-intercepts-and-graph-exploration/ssssswr7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-linear-functions-slope-intercepts-and-graph-exploration/ssssswr7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-linear-functions-slope-intercepts-and-graph-exploration/ssssswr7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-linear-functions-slope-intercepts-and-graph-exploration/ssssswr7"/>
      <lastmod>2026-11-01T21:10:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-linear-functions-slope-intercepts-and-graph-exploration/ssssswr7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-linear-functions-slope-intercepts-and-graph-exploration/ssssswr7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-linear-functions-slope-intercepts-and-graph-exploration/ssssswr7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-linear-functions-slope-intercepts-and-graph-exploration/ssssswr7"/>
      <lastmod>2026-11-01T21:10:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-inequality-theorem-exploration/ssssswrn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-inequality-theorem-exploration/ssssswrn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-inequality-theorem-exploration/ssssswrn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-inequality-theorem-exploration/ssssswrn"/>
      <lastmod>2026-11-01T19:18:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-inequality-theorem-exploration/ssssswrn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-inequality-theorem-exploration/ssssswrn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-inequality-theorem-exploration/ssssswrn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-inequality-theorem-exploration/ssssswrn"/>
      <lastmod>2026-11-01T19:18:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unstable-snowman/ssssswr2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unstable-snowman/ssssswr2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unstable-snowman/ssssswr2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unstable-snowman/ssssswr2"/>
      <lastmod>2026-11-01T21:27:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unstable-snowman/ssssswr2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unstable-snowman/ssssswr2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unstable-snowman/ssssswr2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unstable-snowman/ssssswr2"/>
      <lastmod>2026-11-01T21:27:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-2/ssssswrk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-2/ssssswrk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-illustration-by-tim-brzezinski-2/ssssswrk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-2/ssssswrk"/>
      <lastmod>2026-11-02T03:16:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-geometry-illustration-by-tim-brzezinski-2/ssssswrk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-2/ssssswrk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-illustration-by-tim-brzezinski-2/ssssswrk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-2/ssssswrk"/>
      <lastmod>2026-11-02T03:16:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-limits/ssssswrz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-limits/ssssswrz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-limits/ssssswrz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-limits/ssssswrz"/>
      <lastmod>2026-11-01T23:15:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-limits/ssssswrz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-limits/ssssswrz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-limits/ssssswrz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-limits/ssssswrz"/>
      <lastmod>2026-11-01T23:15:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-bisector-of-a-line-segment-by-kevin-lynch/ssssswr0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-of-a-line-segment-by-kevin-lynch/ssssswr0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisector-of-a-line-segment-by-kevin-lynch/ssssswr0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-of-a-line-segment-by-kevin-lynch/ssssswr0"/>
      <lastmod>2026-11-02T12:09:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-bisector-of-a-line-segment-by-kevin-lynch/ssssswr0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-of-a-line-segment-by-kevin-lynch/ssssswr0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisector-of-a-line-segment-by-kevin-lynch/ssssswr0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisector-of-a-line-segment-by-kevin-lynch/ssssswr0"/>
      <lastmod>2026-11-02T12:09:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/partial-derivative-calculator/ssssswrd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-derivative-calculator/ssssswrd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-derivative-calculator/ssssswrd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-derivative-calculator/ssssswrd"/>
      <lastmod>2026-11-02T17:13:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/partial-derivative-calculator/ssssswrd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-derivative-calculator/ssssswrd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-derivative-calculator/ssssswrd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-derivative-calculator/ssssswrd"/>
      <lastmod>2026-11-02T17:13:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/simultaneous-equations-as-sum-of-3-vectors/ssssswrf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simultaneous-equations-as-sum-of-3-vectors/ssssswrf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simultaneous-equations-as-sum-of-3-vectors/ssssswrf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simultaneous-equations-as-sum-of-3-vectors/ssssswrf"/>
      <lastmod>2026-11-02T08:38:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/simultaneous-equations-as-sum-of-3-vectors/ssssswrf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/simultaneous-equations-as-sum-of-3-vectors/ssssswrf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/simultaneous-equations-as-sum-of-3-vectors/ssssswrf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/simultaneous-equations-as-sum-of-3-vectors/ssssswrf"/>
      <lastmod>2026-11-02T08:38:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dr-fisher-s-exponents-game-level-4/ssssswr8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dr-fisher-s-exponents-game-level-4/ssssswr8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dr-fisher-s-exponents-game-level-4/ssssswr8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dr-fisher-s-exponents-game-level-4/ssssswr8"/>
      <lastmod>2026-11-01T19:33:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dr-fisher-s-exponents-game-level-4/ssssswr8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dr-fisher-s-exponents-game-level-4/ssssswr8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dr-fisher-s-exponents-game-level-4/ssssswr8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dr-fisher-s-exponents-game-level-4/ssssswr8"/>
      <lastmod>2026-11-01T19:33:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-path-intersection-demo/ssssswru</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-path-intersection-demo/ssssswru"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-path-intersection-demo/ssssswru"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-path-intersection-demo/ssssswru"/>
      <lastmod>2026-11-01T19:29:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-path-intersection-demo/ssssswru</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-path-intersection-demo/ssssswru"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-path-intersection-demo/ssssswru"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-path-intersection-demo/ssssswru"/>
      <lastmod>2026-11-01T19:29:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/deriving-trigonometric-ratios-for-0-and-90/ssssswr5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/deriving-trigonometric-ratios-for-0-and-90/ssssswr5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/deriving-trigonometric-ratios-for-0-and-90/ssssswr5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/deriving-trigonometric-ratios-for-0-and-90/ssssswr5"/>
      <lastmod>2026-11-02T18:59:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/deriving-trigonometric-ratios-for-0-and-90/ssssswr5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/deriving-trigonometric-ratios-for-0-and-90/ssssswr5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/deriving-trigonometric-ratios-for-0-and-90/ssssswr5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/deriving-trigonometric-ratios-for-0-and-90/ssssswr5"/>
      <lastmod>2026-11-02T18:59:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/calculating-surface-area-of-a-triangular-prism/ssssswrb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-surface-area-of-a-triangular-prism/ssssswrb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-surface-area-of-a-triangular-prism/ssssswrb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-surface-area-of-a-triangular-prism/ssssswrb"/>
      <lastmod>2026-11-01T21:55:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/calculating-surface-area-of-a-triangular-prism/ssssswrb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculating-surface-area-of-a-triangular-prism/ssssswrb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculating-surface-area-of-a-triangular-prism/ssssswrb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculating-surface-area-of-a-triangular-prism/ssssswrb"/>
      <lastmod>2026-11-01T21:55:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-net-by-emma-clifton/ssssswr3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-net-by-emma-clifton/ssssswr3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-net-by-emma-clifton/ssssswr3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-net-by-emma-clifton/ssssswr3"/>
      <lastmod>2026-11-02T17:08:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-net-by-emma-clifton/ssssswr3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-net-by-emma-clifton/ssssswr3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-net-by-emma-clifton/ssssswr3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-net-by-emma-clifton/ssssswr3"/>
      <lastmod>2026-11-02T17:08:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbolas/ssssswrq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbolas/ssssswrq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbolas/ssssswrq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbolas/ssssswrq"/>
      <lastmod>2026-11-02T16:41:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbolas/ssssswrq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbolas/ssssswrq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbolas/ssssswrq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbolas/ssssswrq"/>
      <lastmod>2026-11-02T16:41:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformed-logarithmic-function/ssssswr1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformed-logarithmic-function/ssssswr1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformed-logarithmic-function/ssssswr1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformed-logarithmic-function/ssssswr1"/>
      <lastmod>2026-11-01T23:59:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformed-logarithmic-function/ssssswr1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformed-logarithmic-function/ssssswr1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformed-logarithmic-function/ssssswr1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformed-logarithmic-function/ssssswr1"/>
      <lastmod>2026-11-01T23:59:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-line-integral-definition-and-f-t-examples/ssssswrm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-line-integral-definition-and-f-t-examples/ssssswrm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-line-integral-definition-and-f-t-examples/ssssswrm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-line-integral-definition-and-f-t-examples/ssssswrm"/>
      <lastmod>2026-11-02T16:50:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-line-integral-definition-and-f-t-examples/ssssswrm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-line-integral-definition-and-f-t-examples/ssssswrm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-line-integral-definition-and-f-t-examples/ssssswrm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-line-integral-definition-and-f-t-examples/ssssswrm"/>
      <lastmod>2026-11-02T16:50:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/huygens-1673-approximating-arc-length/ssssswrj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/huygens-1673-approximating-arc-length/ssssswrj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/huygens-1673-approximating-arc-length/ssssswrj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/huygens-1673-approximating-arc-length/ssssswrj"/>
      <lastmod>2026-11-01T21:39:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/huygens-1673-approximating-arc-length/ssssswrj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/huygens-1673-approximating-arc-length/ssssswrj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/huygens-1673-approximating-arc-length/ssssswrj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/huygens-1673-approximating-arc-length/ssssswrj"/>
      <lastmod>2026-11-01T21:39:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/general-bezier-curves/ssssswrp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/general-bezier-curves/ssssswrp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/general-bezier-curves/ssssswrp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/general-bezier-curves/ssssswrp"/>
      <lastmod>2026-11-02T14:54:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/general-bezier-curves/ssssswrp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/general-bezier-curves/ssssswrp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/general-bezier-curves/ssssswrp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/general-bezier-curves/ssssswrp"/>
      <lastmod>2026-11-02T14:54:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-thales-demonstration/ssssswrw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-thales-demonstration/ssssswrw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-thales-demonstration/ssssswrw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-thales-demonstration/ssssswrw"/>
      <lastmod>2026-11-02T18:36:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-thales-demonstration/ssssswrw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-thales-demonstration/ssssswrw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-thales-demonstration/ssssswrw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-thales-demonstration/ssssswrw"/>
      <lastmod>2026-11-02T18:36:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/why-pqrs-is-a-rhombus-when-abcd-is-a-rectangle/ssssswr6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/why-pqrs-is-a-rhombus-when-abcd-is-a-rectangle/ssssswr6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/why-pqrs-is-a-rhombus-when-abcd-is-a-rectangle/ssssswr6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/why-pqrs-is-a-rhombus-when-abcd-is-a-rectangle/ssssswr6"/>
      <lastmod>2026-11-02T15:30:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/why-pqrs-is-a-rhombus-when-abcd-is-a-rectangle/ssssswr6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/why-pqrs-is-a-rhombus-when-abcd-is-a-rectangle/ssssswr6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/why-pqrs-is-a-rhombus-when-abcd-is-a-rectangle/ssssswr6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/why-pqrs-is-a-rhombus-when-abcd-is-a-rectangle/ssssswr6"/>
      <lastmod>2026-11-02T15:30:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-inequality-test-point-practice-determine-the-solution-region/ssssswrg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-inequality-test-point-practice-determine-the-solution-region/ssssswrg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-inequality-test-point-practice-determine-the-solution-region/ssssswrg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-inequality-test-point-practice-determine-the-solution-region/ssssswrg"/>
      <lastmod>2026-11-01T21:02:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-inequality-test-point-practice-determine-the-solution-region/ssssswrg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-inequality-test-point-practice-determine-the-solution-region/ssssswrg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-inequality-test-point-practice-determine-the-solution-region/ssssswrg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-inequality-test-point-practice-determine-the-solution-region/ssssswrg"/>
      <lastmod>2026-11-01T21:02:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/powers-of-1-i-visualizing-rotation-and-scaling/ssssswr9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/powers-of-1-i-visualizing-rotation-and-scaling/ssssswr9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/powers-of-1-i-visualizing-rotation-and-scaling/ssssswr9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/powers-of-1-i-visualizing-rotation-and-scaling/ssssswr9"/>
      <lastmod>2026-11-01T19:21:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/powers-of-1-i-visualizing-rotation-and-scaling/ssssswr9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/powers-of-1-i-visualizing-rotation-and-scaling/ssssswr9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/powers-of-1-i-visualizing-rotation-and-scaling/ssssswr9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/powers-of-1-i-visualizing-rotation-and-scaling/ssssswr9"/>
      <lastmod>2026-11-01T19:21:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotations-of-shapes-around-a-point-not-at-the-origin/ssssswre</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotations-of-shapes-around-a-point-not-at-the-origin/ssssswre"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotations-of-shapes-around-a-point-not-at-the-origin/ssssswre"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotations-of-shapes-around-a-point-not-at-the-origin/ssssswre"/>
      <lastmod>2026-11-01T21:32:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotations-of-shapes-around-a-point-not-at-the-origin/ssssswre</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotations-of-shapes-around-a-point-not-at-the-origin/ssssswre"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotations-of-shapes-around-a-point-not-at-the-origin/ssssswre"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotations-of-shapes-around-a-point-not-at-the-origin/ssssswre"/>
      <lastmod>2026-11-01T21:32:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/right-triangle-builder/ssssswrv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-builder/ssssswrv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-builder/ssssswrv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-builder/ssssswrv"/>
      <lastmod>2026-11-02T17:18:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/right-triangle-builder/ssssswrv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/right-triangle-builder/ssssswrv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/right-triangle-builder/ssssswrv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/right-triangle-builder/ssssswrv"/>
      <lastmod>2026-11-02T17:18:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-congruence-discovery/ssssswr4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-congruence-discovery/ssssswr4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-congruence-discovery/ssssswr4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-congruence-discovery/ssssswr4"/>
      <lastmod>2026-11-02T16:42:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-congruence-discovery/ssssswr4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-congruence-discovery/ssssswr4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-congruence-discovery/ssssswr4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-congruence-discovery/ssssswr4"/>
      <lastmod>2026-11-02T16:42:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-of-revolution-geogebra-ar-template/ssssswrl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-geogebra-ar-template/ssssswrl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-geogebra-ar-template/ssssswrl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-geogebra-ar-template/ssssswrl"/>
      <lastmod>2026-11-01T23:47:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-of-revolution-geogebra-ar-template/ssssswrl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-of-revolution-geogebra-ar-template/ssssswrl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-of-revolution-geogebra-ar-template/ssssswrl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-of-revolution-geogebra-ar-template/ssssswrl"/>
      <lastmod>2026-11-01T23:47:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-vectors-and-plane-geometry-practice-h2m-l11-q15/ssssswry</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-vectors-and-plane-geometry-practice-h2m-l11-q15/ssssswry"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-vectors-and-plane-geometry-practice-h2m-l11-q15/ssssswry"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-vectors-and-plane-geometry-practice-h2m-l11-q15/ssssswry"/>
      <lastmod>2026-11-01T19:29:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-vectors-and-plane-geometry-practice-h2m-l11-q15/ssssswry</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-vectors-and-plane-geometry-practice-h2m-l11-q15/ssssswry"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-vectors-and-plane-geometry-practice-h2m-l11-q15/ssssswry"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-vectors-and-plane-geometry-practice-h2m-l11-q15/ssssswry"/>
      <lastmod>2026-11-01T19:29:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-qrs-dilation/ssssswra</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-qrs-dilation/ssssswra"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-qrs-dilation/ssssswra"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-qrs-dilation/ssssswra"/>
      <lastmod>2026-11-02T17:55:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-qrs-dilation/ssssswra</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-qrs-dilation/ssssswra"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-qrs-dilation/ssssswra"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-qrs-dilation/ssssswra"/>
      <lastmod>2026-11-02T17:55:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-regression-t-test-for-slope/ssssswrc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-regression-t-test-for-slope/ssssswrc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-regression-t-test-for-slope/ssssswrc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-regression-t-test-for-slope/ssssswrc"/>
      <lastmod>2026-11-02T17:18:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-regression-t-test-for-slope/ssssswrc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-regression-t-test-for-slope/ssssswrc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-regression-t-test-for-slope/ssssswrc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-regression-t-test-for-slope/ssssswrc"/>
      <lastmod>2026-11-02T17:18:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-limits-by-heather-pierce/ssssswrr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-limits-by-heather-pierce/ssssswrr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-limits-by-heather-pierce/ssssswrr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-limits-by-heather-pierce/ssssswrr"/>
      <lastmod>2026-11-02T16:38:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-limits-by-heather-pierce/ssssswrr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-limits-by-heather-pierce/ssssswrr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-limits-by-heather-pierce/ssssswrr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-limits-by-heather-pierce/ssssswrr"/>
      <lastmod>2026-11-02T16:38:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/how-geogebra-makes-creating-various-types-of-regression-super-easy/ssssswrh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-geogebra-makes-creating-various-types-of-regression-super-easy/ssssswrh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-geogebra-makes-creating-various-types-of-regression-super-easy/ssssswrh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-geogebra-makes-creating-various-types-of-regression-super-easy/ssssswrh"/>
      <lastmod>2026-11-01T23:48:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/how-geogebra-makes-creating-various-types-of-regression-super-easy/ssssswrh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-geogebra-makes-creating-various-types-of-regression-super-easy/ssssswrh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-geogebra-makes-creating-various-types-of-regression-super-easy/ssssswrh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-geogebra-makes-creating-various-types-of-regression-super-easy/ssssswrh"/>
      <lastmod>2026-11-01T23:48:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/using-triple-integral-to-find-volume/ssssswrt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-triple-integral-to-find-volume/ssssswrt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-triple-integral-to-find-volume/ssssswrt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-triple-integral-to-find-volume/ssssswrt"/>
      <lastmod>2026-11-02T18:50:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/using-triple-integral-to-find-volume/ssssswrt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-triple-integral-to-find-volume/ssssswrt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-triple-integral-to-find-volume/ssssswrt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-triple-integral-to-find-volume/ssssswrt"/>
      <lastmod>2026-11-02T18:50:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-addition-by-d-jayaseelan/ssssswrx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-by-d-jayaseelan/ssssswrx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-by-d-jayaseelan/ssssswrx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-by-d-jayaseelan/ssssswrx"/>
      <lastmod>2026-11-02T09:03:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-addition-by-d-jayaseelan/ssssswrx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-addition-by-d-jayaseelan/ssssswrx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-addition-by-d-jayaseelan/ssssswrx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-addition-by-d-jayaseelan/ssssswrx"/>
      <lastmod>2026-11-02T09:03:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-dilations-on-the-coordinate-plane/ssssswri</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-dilations-on-the-coordinate-plane/ssssswri"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-dilations-on-the-coordinate-plane/ssssswri"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-dilations-on-the-coordinate-plane/ssssswri"/>
      <lastmod>2026-11-02T17:14:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-dilations-on-the-coordinate-plane/ssssswri</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-dilations-on-the-coordinate-plane/ssssswri"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-dilations-on-the-coordinate-plane/ssssswri"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-dilations-on-the-coordinate-plane/ssssswri"/>
      <lastmod>2026-11-02T17:14:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/check-consistency-of-linear-equation-system/ssssswro</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/check-consistency-of-linear-equation-system/ssssswro"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/check-consistency-of-linear-equation-system/ssssswro"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/check-consistency-of-linear-equation-system/ssssswro"/>
      <lastmod>2026-11-02T18:55:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/check-consistency-of-linear-equation-system/ssssswro</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/check-consistency-of-linear-equation-system/ssssswro"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/check-consistency-of-linear-equation-system/ssssswro"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/check-consistency-of-linear-equation-system/ssssswro"/>
      <lastmod>2026-11-02T18:55:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/recording-values-to-a-spreadsheet-geogebra-data-collection-basics/ssssswhs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/recording-values-to-a-spreadsheet-geogebra-data-collection-basics/ssssswhs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/recording-values-to-a-spreadsheet-geogebra-data-collection-basics/ssssswhs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/recording-values-to-a-spreadsheet-geogebra-data-collection-basics/ssssswhs"/>
      <lastmod>2026-11-01T22:10:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/recording-values-to-a-spreadsheet-geogebra-data-collection-basics/ssssswhs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/recording-values-to-a-spreadsheet-geogebra-data-collection-basics/ssssswhs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/recording-values-to-a-spreadsheet-geogebra-data-collection-basics/ssssswhs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/recording-values-to-a-spreadsheet-geogebra-data-collection-basics/ssssswhs"/>
      <lastmod>2026-11-01T22:10:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/z-tests-distributions-and-statistics/ssssswh7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/z-tests-distributions-and-statistics/ssssswh7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/z-tests-distributions-and-statistics/ssssswh7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/z-tests-distributions-and-statistics/ssssswh7"/>
      <lastmod>2026-11-01T20:57:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/z-tests-distributions-and-statistics/ssssswh7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/z-tests-distributions-and-statistics/ssssswh7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/z-tests-distributions-and-statistics/ssssswh7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/z-tests-distributions-and-statistics/ssssswh7"/>
      <lastmod>2026-11-01T20:57:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quick-quiz-graphing-slope-types/ssssswhn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quick-quiz-graphing-slope-types/ssssswhn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quick-quiz-graphing-slope-types/ssssswhn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quick-quiz-graphing-slope-types/ssssswhn"/>
      <lastmod>2026-11-02T03:01:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quick-quiz-graphing-slope-types/ssssswhn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quick-quiz-graphing-slope-types/ssssswhn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quick-quiz-graphing-slope-types/ssssswhn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quick-quiz-graphing-slope-types/ssssswhn"/>
      <lastmod>2026-11-02T03:01:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/defining-a-rotation/ssssswh2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/defining-a-rotation/ssssswh2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/defining-a-rotation/ssssswh2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/defining-a-rotation/ssssswh2"/>
      <lastmod>2026-11-01T21:17:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/defining-a-rotation/ssssswh2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/defining-a-rotation/ssssswh2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/defining-a-rotation/ssssswh2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/defining-a-rotation/ssssswh2"/>
      <lastmod>2026-11-01T21:17:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/moving-place-value/ssssswhk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/moving-place-value/ssssswhk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/moving-place-value/ssssswhk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/moving-place-value/ssssswhk"/>
      <lastmod>2026-11-02T17:35:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/moving-place-value/ssssswhk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/moving-place-value/ssssswhk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/moving-place-value/ssssswhk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/moving-place-value/ssssswhk"/>
      <lastmod>2026-11-02T17:35:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/messing-with-splines-interactive-parametric-curve-exploration/ssssswhz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/messing-with-splines-interactive-parametric-curve-exploration/ssssswhz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/messing-with-splines-interactive-parametric-curve-exploration/ssssswhz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/messing-with-splines-interactive-parametric-curve-exploration/ssssswhz"/>
      <lastmod>2026-11-01T21:10:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/messing-with-splines-interactive-parametric-curve-exploration/ssssswhz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/messing-with-splines-interactive-parametric-curve-exploration/ssssswhz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/messing-with-splines-interactive-parametric-curve-exploration/ssssswhz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/messing-with-splines-interactive-parametric-curve-exploration/ssssswhz"/>
      <lastmod>2026-11-01T21:10:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-shadow-knows/ssssswh0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-shadow-knows/ssssswh0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-shadow-knows/ssssswh0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-shadow-knows/ssssswh0"/>
      <lastmod>2026-11-02T10:38:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-shadow-knows/ssssswh0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-shadow-knows/ssssswh0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-shadow-knows/ssssswh0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-shadow-knows/ssssswh0"/>
      <lastmod>2026-11-02T10:38:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shreddies-and-milk-2-inequalities-logarithms-and-secant-lines/ssssswhd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shreddies-and-milk-2-inequalities-logarithms-and-secant-lines/ssssswhd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shreddies-and-milk-2-inequalities-logarithms-and-secant-lines/ssssswhd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shreddies-and-milk-2-inequalities-logarithms-and-secant-lines/ssssswhd"/>
      <lastmod>2026-11-01T21:02:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shreddies-and-milk-2-inequalities-logarithms-and-secant-lines/ssssswhd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shreddies-and-milk-2-inequalities-logarithms-and-secant-lines/ssssswhd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shreddies-and-milk-2-inequalities-logarithms-and-secant-lines/ssssswhd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shreddies-and-milk-2-inequalities-logarithms-and-secant-lines/ssssswhd"/>
      <lastmod>2026-11-01T21:02:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pyramid-to-cone-transformation/ssssswhf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-to-cone-transformation/ssssswhf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-to-cone-transformation/ssssswhf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-to-cone-transformation/ssssswhf"/>
      <lastmod>2026-11-02T15:05:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pyramid-to-cone-transformation/ssssswhf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pyramid-to-cone-transformation/ssssswhf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pyramid-to-cone-transformation/ssssswhf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pyramid-to-cone-transformation/ssssswhf"/>
      <lastmod>2026-11-02T15:05:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/set-notation-venn-diagrams-matching-activity-by-epsilon58/ssssswh8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/set-notation-venn-diagrams-matching-activity-by-epsilon58/ssssswh8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/set-notation-venn-diagrams-matching-activity-by-epsilon58/ssssswh8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/set-notation-venn-diagrams-matching-activity-by-epsilon58/ssssswh8"/>
      <lastmod>2026-11-02T03:02:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/set-notation-venn-diagrams-matching-activity-by-epsilon58/ssssswh8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/set-notation-venn-diagrams-matching-activity-by-epsilon58/ssssswh8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/set-notation-venn-diagrams-matching-activity-by-epsilon58/ssssswh8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/set-notation-venn-diagrams-matching-activity-by-epsilon58/ssssswh8"/>
      <lastmod>2026-11-02T03:02:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/determining-exact-values-on-the-unit-circle/ssssswhu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/determining-exact-values-on-the-unit-circle/ssssswhu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/determining-exact-values-on-the-unit-circle/ssssswhu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/determining-exact-values-on-the-unit-circle/ssssswhu"/>
      <lastmod>2026-11-02T17:51:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/determining-exact-values-on-the-unit-circle/ssssswhu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/determining-exact-values-on-the-unit-circle/ssssswhu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/determining-exact-values-on-the-unit-circle/ssssswhu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/determining-exact-values-on-the-unit-circle/ssssswhu"/>
      <lastmod>2026-11-02T17:51:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/starfish/ssssswh5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/starfish/ssssswh5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/starfish/ssssswh5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/starfish/ssssswh5"/>
      <lastmod>2026-11-02T06:15:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/starfish/ssssswh5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/starfish/ssssswh5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/starfish/ssssswh5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/starfish/ssssswh5"/>
      <lastmod>2026-11-02T06:15:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-vectors-by-trevor-jensen/ssssswhb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-vectors-by-trevor-jensen/ssssswhb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-vectors-by-trevor-jensen/ssssswhb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-vectors-by-trevor-jensen/ssssswhb"/>
      <lastmod>2026-11-01T19:23:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-vectors-by-trevor-jensen/ssssswhb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-vectors-by-trevor-jensen/ssssswhb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-vectors-by-trevor-jensen/ssssswhb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-vectors-by-trevor-jensen/ssssswhb"/>
      <lastmod>2026-11-01T19:23:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/using-decimals-in-a-shopping-context-by-geogebra-classroom-activities/ssssswh3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-decimals-in-a-shopping-context-by-geogebra-classroom-activities/ssssswh3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-decimals-in-a-shopping-context-by-geogebra-classroom-activities/ssssswh3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-decimals-in-a-shopping-context-by-geogebra-classroom-activities/ssssswh3"/>
      <lastmod>2026-11-01T22:59:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/using-decimals-in-a-shopping-context-by-geogebra-classroom-activities/ssssswh3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/using-decimals-in-a-shopping-context-by-geogebra-classroom-activities/ssssswh3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/using-decimals-in-a-shopping-context-by-geogebra-classroom-activities/ssssswh3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/using-decimals-in-a-shopping-context-by-geogebra-classroom-activities/ssssswh3"/>
      <lastmod>2026-11-01T22:59:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/how-to-enter-algebraic-input-in-geogebra/ssssswhq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-to-enter-algebraic-input-in-geogebra/ssssswhq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-to-enter-algebraic-input-in-geogebra/ssssswhq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-to-enter-algebraic-input-in-geogebra/ssssswhq"/>
      <lastmod>2026-11-02T18:36:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/how-to-enter-algebraic-input-in-geogebra/ssssswhq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-to-enter-algebraic-input-in-geogebra/ssssswhq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-to-enter-algebraic-input-in-geogebra/ssssswhq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-to-enter-algebraic-input-in-geogebra/ssssswhq"/>
      <lastmod>2026-11-02T18:36:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gauss-elimination-in-geogebra-cas/ssssswh1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gauss-elimination-in-geogebra-cas/ssssswh1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gauss-elimination-in-geogebra-cas/ssssswh1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gauss-elimination-in-geogebra-cas/ssssswh1"/>
      <lastmod>2026-11-02T16:48:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gauss-elimination-in-geogebra-cas/ssssswh1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gauss-elimination-in-geogebra-cas/ssssswh1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gauss-elimination-in-geogebra-cas/ssssswh1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gauss-elimination-in-geogebra-cas/ssssswh1"/>
      <lastmod>2026-11-02T16:48:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-construction-by-hrawson20/ssssswhm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-by-hrawson20/ssssswhm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-by-hrawson20/ssssswhm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-by-hrawson20/ssssswhm"/>
      <lastmod>2026-11-02T15:51:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-construction-by-hrawson20/ssssswhm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-construction-by-hrawson20/ssssswhm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-construction-by-hrawson20/ssssswhm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-construction-by-hrawson20/ssssswhm"/>
      <lastmod>2026-11-02T15:51:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-demonstration-of-between-ness-in-addition-and-subtraction/ssssswhj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-between-ness-in-addition-and-subtraction/ssssswhj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demonstration-of-between-ness-in-addition-and-subtraction/ssssswhj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-between-ness-in-addition-and-subtraction/ssssswhj"/>
      <lastmod>2026-11-02T18:13:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-demonstration-of-between-ness-in-addition-and-subtraction/ssssswhj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-between-ness-in-addition-and-subtraction/ssssswhj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-demonstration-of-between-ness-in-addition-and-subtraction/ssssswhj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-demonstration-of-between-ness-in-addition-and-subtraction/ssssswhj"/>
      <lastmod>2026-11-02T18:13:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-fraction-comparison/ssssswhp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-fraction-comparison/ssssswhp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-fraction-comparison/ssssswhp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-fraction-comparison/ssssswhp"/>
      <lastmod>2026-11-02T15:04:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-fraction-comparison/ssssswhp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-fraction-comparison/ssssswhp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-fraction-comparison/ssssswhp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-fraction-comparison/ssssswhp"/>
      <lastmod>2026-11-02T15:04:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-three-planes/ssssswhw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-three-planes/ssssswhw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-three-planes/ssssswhw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-three-planes/ssssswhw"/>
      <lastmod>2026-11-01T23:30:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-three-planes/ssssswhw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-three-planes/ssssswhw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-three-planes/ssssswhw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-three-planes/ssssswhw"/>
      <lastmod>2026-11-01T23:30:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/normal-distribution-spotlight/ssssswh6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-spotlight/ssssswh6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-spotlight/ssssswh6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-spotlight/ssssswh6"/>
      <lastmod>2026-11-01T20:41:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/normal-distribution-spotlight/ssssswh6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/normal-distribution-spotlight/ssssswh6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/normal-distribution-spotlight/ssssswh6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/normal-distribution-spotlight/ssssswh6"/>
      <lastmod>2026-11-01T20:41:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wave-form/ssssswhg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wave-form/ssssswhg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wave-form/ssssswhg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wave-form/ssssswhg"/>
      <lastmod>2026-11-02T00:36:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wave-form/ssssswhg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wave-form/ssssswhg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wave-form/ssssswhg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wave-form/ssssswhg"/>
      <lastmod>2026-11-02T00:36:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-distribution-image-generator-dynamic-tree-diagrams-and-bar-charts/ssssswh9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-image-generator-dynamic-tree-diagrams-and-bar-charts/ssssswh9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-image-generator-dynamic-tree-diagrams-and-bar-charts/ssssswh9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-image-generator-dynamic-tree-diagrams-and-bar-charts/ssssswh9"/>
      <lastmod>2026-11-01T21:18:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-distribution-image-generator-dynamic-tree-diagrams-and-bar-charts/ssssswh9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-image-generator-dynamic-tree-diagrams-and-bar-charts/ssssswh9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-image-generator-dynamic-tree-diagrams-and-bar-charts/ssssswh9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-image-generator-dynamic-tree-diagrams-and-bar-charts/ssssswh9"/>
      <lastmod>2026-11-01T21:18:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoid-c-trapezoidal-sum-demonstration/ssssswhe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-c-trapezoidal-sum-demonstration/ssssswhe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-c-trapezoidal-sum-demonstration/ssssswhe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-c-trapezoidal-sum-demonstration/ssssswhe"/>
      <lastmod>2026-11-02T17:57:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoid-c-trapezoidal-sum-demonstration/ssssswhe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoid-c-trapezoidal-sum-demonstration/ssssswhe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoid-c-trapezoidal-sum-demonstration/ssssswhe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoid-c-trapezoidal-sum-demonstration/ssssswhe"/>
      <lastmod>2026-11-02T17:57:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vectors-introduction-1-dynamic-and-modifiable/ssssswhv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-introduction-1-dynamic-and-modifiable/ssssswhv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-introduction-1-dynamic-and-modifiable/ssssswhv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-introduction-1-dynamic-and-modifiable/ssssswhv"/>
      <lastmod>2026-11-02T17:57:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vectors-introduction-1-dynamic-and-modifiable/ssssswhv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-introduction-1-dynamic-and-modifiable/ssssswhv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-introduction-1-dynamic-and-modifiable/ssssswhv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-introduction-1-dynamic-and-modifiable/ssssswhv"/>
      <lastmod>2026-11-02T17:57:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-equilateral-triangle-median-value-problem/ssssswh4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-equilateral-triangle-median-value-problem/ssssswh4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-equilateral-triangle-median-value-problem/ssssswh4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-equilateral-triangle-median-value-problem/ssssswh4"/>
      <lastmod>2026-11-02T03:10:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-equilateral-triangle-median-value-problem/ssssswh4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-equilateral-triangle-median-value-problem/ssssswh4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-equilateral-triangle-median-value-problem/ssssswh4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-equilateral-triangle-median-value-problem/ssssswh4"/>
      <lastmod>2026-11-02T03:10:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-logo-xvii-disk-to-regular-polygon/ssssswhl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-logo-xvii-disk-to-regular-polygon/ssssswhl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-logo-xvii-disk-to-regular-polygon/ssssswhl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-logo-xvii-disk-to-regular-polygon/ssssswhl"/>
      <lastmod>2026-11-02T16:37:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-logo-xvii-disk-to-regular-polygon/ssssswhl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-logo-xvii-disk-to-regular-polygon/ssssswhl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-logo-xvii-disk-to-regular-polygon/ssssswhl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-logo-xvii-disk-to-regular-polygon/ssssswhl"/>
      <lastmod>2026-11-02T16:37:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilation-and-ratio-of-distances/ssssswhy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-and-ratio-of-distances/ssssswhy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-and-ratio-of-distances/ssssswhy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-and-ratio-of-distances/ssssswhy"/>
      <lastmod>2026-11-01T20:55:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilation-and-ratio-of-distances/ssssswhy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-and-ratio-of-distances/ssssswhy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-and-ratio-of-distances/ssssswhy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-and-ratio-of-distances/ssssswhy"/>
      <lastmod>2026-11-01T20:55:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/planes-for-3x3-matrix-calculation/ssssswha</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planes-for-3x3-matrix-calculation/ssssswha"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes-for-3x3-matrix-calculation/ssssswha"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes-for-3x3-matrix-calculation/ssssswha"/>
      <lastmod>2026-11-02T16:50:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/planes-for-3x3-matrix-calculation/ssssswha</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planes-for-3x3-matrix-calculation/ssssswha"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes-for-3x3-matrix-calculation/ssssswha"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes-for-3x3-matrix-calculation/ssssswha"/>
      <lastmod>2026-11-02T16:50:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/standard-normal-curve-and-probabilities/ssssswhc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-normal-curve-and-probabilities/ssssswhc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-normal-curve-and-probabilities/ssssswhc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-normal-curve-and-probabilities/ssssswhc"/>
      <lastmod>2026-11-02T17:07:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/standard-normal-curve-and-probabilities/ssssswhc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/standard-normal-curve-and-probabilities/ssssswhc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/standard-normal-curve-and-probabilities/ssssswhc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/standard-normal-curve-and-probabilities/ssssswhc"/>
      <lastmod>2026-11-02T17:07:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/how-many-ounces-an-interactive-exploration-of-unit-conversion-and-geometry/ssssswhr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-many-ounces-an-interactive-exploration-of-unit-conversion-and-geometry/ssssswhr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-many-ounces-an-interactive-exploration-of-unit-conversion-and-geometry/ssssswhr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-many-ounces-an-interactive-exploration-of-unit-conversion-and-geometry/ssssswhr"/>
      <lastmod>2026-11-02T06:11:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/how-many-ounces-an-interactive-exploration-of-unit-conversion-and-geometry/ssssswhr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-many-ounces-an-interactive-exploration-of-unit-conversion-and-geometry/ssssswhr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-many-ounces-an-interactive-exploration-of-unit-conversion-and-geometry/ssssswhr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-many-ounces-an-interactive-exploration-of-unit-conversion-and-geometry/ssssswhr"/>
      <lastmod>2026-11-02T06:11:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ssa-ambiguous-case-dynamic-illustrator/ssssswhh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ssa-ambiguous-case-dynamic-illustrator/ssssswhh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ssa-ambiguous-case-dynamic-illustrator/ssssswhh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ssa-ambiguous-case-dynamic-illustrator/ssssswhh"/>
      <lastmod>2026-11-02T02:48:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ssa-ambiguous-case-dynamic-illustrator/ssssswhh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ssa-ambiguous-case-dynamic-illustrator/ssssswhh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ssa-ambiguous-case-dynamic-illustrator/ssssswhh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ssa-ambiguous-case-dynamic-illustrator/ssssswhh"/>
      <lastmod>2026-11-02T02:48:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mean-absolute-deviation-demo/ssssswht</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mean-absolute-deviation-demo/ssssswht"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mean-absolute-deviation-demo/ssssswht"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mean-absolute-deviation-demo/ssssswht"/>
      <lastmod>2026-11-02T03:05:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mean-absolute-deviation-demo/ssssswht</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mean-absolute-deviation-demo/ssssswht"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mean-absolute-deviation-demo/ssssswht"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mean-absolute-deviation-demo/ssssswht"/>
      <lastmod>2026-11-02T03:05:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotation-construction-demo-by-jason-wofsey/ssssswhx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-construction-demo-by-jason-wofsey/ssssswhx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-construction-demo-by-jason-wofsey/ssssswhx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-construction-demo-by-jason-wofsey/ssssswhx"/>
      <lastmod>2026-11-02T17:48:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotation-construction-demo-by-jason-wofsey/ssssswhx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotation-construction-demo-by-jason-wofsey/ssssswhx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotation-construction-demo-by-jason-wofsey/ssssswhx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotation-construction-demo-by-jason-wofsey/ssssswhx"/>
      <lastmod>2026-11-02T17:48:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construct-medians/ssssswhi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-medians/ssssswhi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-medians/ssssswhi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-medians/ssssswhi"/>
      <lastmod>2026-11-02T10:58:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construct-medians/ssssswhi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construct-medians/ssssswhi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construct-medians/ssssswhi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construct-medians/ssssswhi"/>
      <lastmod>2026-11-02T10:58:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/accuracy-of-measurement/ssssswho</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/accuracy-of-measurement/ssssswho"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/accuracy-of-measurement/ssssswho"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/accuracy-of-measurement/ssssswho"/>
      <lastmod>2026-11-01T20:30:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/accuracy-of-measurement/ssssswho</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/accuracy-of-measurement/ssssswho"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/accuracy-of-measurement/ssssswho"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/accuracy-of-measurement/ssssswho"/>
      <lastmod>2026-11-01T20:30:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/changing-quantities-of-red-and-blue-paint-in-a-fixed-ratio/ssssswts</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/changing-quantities-of-red-and-blue-paint-in-a-fixed-ratio/ssssswts"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/changing-quantities-of-red-and-blue-paint-in-a-fixed-ratio/ssssswts"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/changing-quantities-of-red-and-blue-paint-in-a-fixed-ratio/ssssswts"/>
      <lastmod>2026-11-01T19:26:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/changing-quantities-of-red-and-blue-paint-in-a-fixed-ratio/ssssswts</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/changing-quantities-of-red-and-blue-paint-in-a-fixed-ratio/ssssswts"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/changing-quantities-of-red-and-blue-paint-in-a-fixed-ratio/ssssswts"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/changing-quantities-of-red-and-blue-paint-in-a-fixed-ratio/ssssswts"/>
      <lastmod>2026-11-01T19:26:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/color-tiles-v2/ssssswt7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/color-tiles-v2/ssssswt7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/color-tiles-v2/ssssswt7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/color-tiles-v2/ssssswt7"/>
      <lastmod>2026-11-02T17:07:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/color-tiles-v2/ssssswt7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/color-tiles-v2/ssssswt7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/color-tiles-v2/ssssswt7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/color-tiles-v2/ssssswt7"/>
      <lastmod>2026-11-02T17:07:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/two-views-of-solving-quadratic-equations/ssssswtn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-views-of-solving-quadratic-equations/ssssswtn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-views-of-solving-quadratic-equations/ssssswtn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-views-of-solving-quadratic-equations/ssssswtn"/>
      <lastmod>2026-11-02T00:02:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/two-views-of-solving-quadratic-equations/ssssswtn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/two-views-of-solving-quadratic-equations/ssssswtn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/two-views-of-solving-quadratic-equations/ssssswtn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/two-views-of-solving-quadratic-equations/ssssswtn"/>
      <lastmod>2026-11-02T00:02:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rhombus-properties-demo-by-grace-piol/ssssswt2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-properties-demo-by-grace-piol/ssssswt2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-properties-demo-by-grace-piol/ssssswt2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-properties-demo-by-grace-piol/ssssswt2"/>
      <lastmod>2026-11-02T00:42:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rhombus-properties-demo-by-grace-piol/ssssswt2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rhombus-properties-demo-by-grace-piol/ssssswt2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rhombus-properties-demo-by-grace-piol/ssssswt2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rhombus-properties-demo-by-grace-piol/ssssswt2"/>
      <lastmod>2026-11-02T00:42:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/broadened-lines-islamic-geometric-pattern/ssssswtk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/broadened-lines-islamic-geometric-pattern/ssssswtk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/broadened-lines-islamic-geometric-pattern/ssssswtk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/broadened-lines-islamic-geometric-pattern/ssssswtk"/>
      <lastmod>2026-11-01T19:34:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/broadened-lines-islamic-geometric-pattern/ssssswtk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/broadened-lines-islamic-geometric-pattern/ssssswtk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/broadened-lines-islamic-geometric-pattern/ssssswtk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/broadened-lines-islamic-geometric-pattern/ssssswtk"/>
      <lastmod>2026-11-01T19:34:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/circle-and-center/ssssswtz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-center/ssssswtz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-center/ssssswtz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-center/ssssswtz"/>
      <lastmod>2026-11-01T21:32:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/circle-and-center/ssssswtz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/circle-and-center/ssssswtz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/circle-and-center/ssssswtz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/circle-and-center/ssssswtz"/>
      <lastmod>2026-11-01T21:32:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/find-the-parallel-and-perpendicular-line-interactive-linear-equation-practice/ssssswt0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-the-parallel-and-perpendicular-line-interactive-linear-equation-practice/ssssswt0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-the-parallel-and-perpendicular-line-interactive-linear-equation-practice/ssssswt0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-the-parallel-and-perpendicular-line-interactive-linear-equation-practice/ssssswt0"/>
      <lastmod>2026-11-01T21:32:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/find-the-parallel-and-perpendicular-line-interactive-linear-equation-practice/ssssswt0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/find-the-parallel-and-perpendicular-line-interactive-linear-equation-practice/ssssswt0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/find-the-parallel-and-perpendicular-line-interactive-linear-equation-practice/ssssswt0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/find-the-parallel-and-perpendicular-line-interactive-linear-equation-practice/ssssswt0"/>
      <lastmod>2026-11-01T21:32:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/generalized-symmetry-number-definition/ssssswtd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/generalized-symmetry-number-definition/ssssswtd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/generalized-symmetry-number-definition/ssssswtd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/generalized-symmetry-number-definition/ssssswtd"/>
      <lastmod>2026-11-01T21:58:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/generalized-symmetry-number-definition/ssssswtd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/generalized-symmetry-number-definition/ssssswtd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/generalized-symmetry-number-definition/ssssswtd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/generalized-symmetry-number-definition/ssssswtd"/>
      <lastmod>2026-11-01T21:58:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construction-of-angle-bisector-using-compasses/ssssswtf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-angle-bisector-using-compasses/ssssswtf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-angle-bisector-using-compasses/ssssswtf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-angle-bisector-using-compasses/ssssswtf"/>
      <lastmod>2026-11-02T17:57:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construction-of-angle-bisector-using-compasses/ssssswtf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-angle-bisector-using-compasses/ssssswtf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-angle-bisector-using-compasses/ssssswtf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-angle-bisector-using-compasses/ssssswtf"/>
      <lastmod>2026-11-02T17:57:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-construction-and-investigation/ssssswt8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-construction-and-investigation/ssssswt8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-construction-and-investigation/ssssswt8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-construction-and-investigation/ssssswt8"/>
      <lastmod>2026-11-01T23:41:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-construction-and-investigation/ssssswt8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-construction-and-investigation/ssssswt8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-construction-and-investigation/ssssswt8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-construction-and-investigation/ssssswt8"/>
      <lastmod>2026-11-01T23:41:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelogram-measurements-by-renee-collingwood/ssssswtu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-measurements-by-renee-collingwood/ssssswtu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-measurements-by-renee-collingwood/ssssswtu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-measurements-by-renee-collingwood/ssssswtu"/>
      <lastmod>2026-11-02T00:37:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelogram-measurements-by-renee-collingwood/ssssswtu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelogram-measurements-by-renee-collingwood/ssssswtu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelogram-measurements-by-renee-collingwood/ssssswtu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelogram-measurements-by-renee-collingwood/ssssswtu"/>
      <lastmod>2026-11-02T00:37:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-rectangular-prisms-measurement-and-geometry/ssssswt5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-rectangular-prisms-measurement-and-geometry/ssssswt5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-rectangular-prisms-measurement-and-geometry/ssssswt5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-rectangular-prisms-measurement-and-geometry/ssssswt5"/>
      <lastmod>2026-11-02T15:50:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-rectangular-prisms-measurement-and-geometry/ssssswt5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-rectangular-prisms-measurement-and-geometry/ssssswt5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-rectangular-prisms-measurement-and-geometry/ssssswt5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-rectangular-prisms-measurement-and-geometry/ssssswt5"/>
      <lastmod>2026-11-02T15:50:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/centroid-circumcenter-incenter-and-orthocenter/ssssswtb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/centroid-circumcenter-incenter-and-orthocenter/ssssswtb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/centroid-circumcenter-incenter-and-orthocenter/ssssswtb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/centroid-circumcenter-incenter-and-orthocenter/ssssswtb"/>
      <lastmod>2026-11-02T09:54:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/centroid-circumcenter-incenter-and-orthocenter/ssssswtb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/centroid-circumcenter-incenter-and-orthocenter/ssssswtb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/centroid-circumcenter-incenter-and-orthocenter/ssssswtb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/centroid-circumcenter-incenter-and-orthocenter/ssssswtb"/>
      <lastmod>2026-11-02T09:54:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-programming-example/ssssswt3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-programming-example/ssssswt3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-programming-example/ssssswt3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-programming-example/ssssswt3"/>
      <lastmod>2026-11-02T18:57:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-programming-example/ssssswt3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-programming-example/ssssswt3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-programming-example/ssssswt3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-programming-example/ssssswt3"/>
      <lastmod>2026-11-02T18:57:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/adding-two-complex-numbers/ssssswtq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-two-complex-numbers/ssssswtq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-two-complex-numbers/ssssswtq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-two-complex-numbers/ssssswtq"/>
      <lastmod>2026-11-02T17:35:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/adding-two-complex-numbers/ssssswtq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/adding-two-complex-numbers/ssssswtq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/adding-two-complex-numbers/ssssswtq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/adding-two-complex-numbers/ssssswtq"/>
      <lastmod>2026-11-02T17:35:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-hyperbola-pencil/ssssswt1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-hyperbola-pencil/ssssswt1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-hyperbola-pencil/ssssswt1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-hyperbola-pencil/ssssswt1"/>
      <lastmod>2026-11-01T19:24:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-hyperbola-pencil/ssssswt1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-hyperbola-pencil/ssssswt1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-hyperbola-pencil/ssssswt1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-hyperbola-pencil/ssssswt1"/>
      <lastmod>2026-11-01T19:24:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/small-angle-limits-by-andy-greasley/ssssswtm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/small-angle-limits-by-andy-greasley/ssssswtm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/small-angle-limits-by-andy-greasley/ssssswtm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/small-angle-limits-by-andy-greasley/ssssswtm"/>
      <lastmod>2026-11-02T10:43:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/small-angle-limits-by-andy-greasley/ssssswtm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/small-angle-limits-by-andy-greasley/ssssswtm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/small-angle-limits-by-andy-greasley/ssssswtm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/small-angle-limits-by-andy-greasley/ssssswtm"/>
      <lastmod>2026-11-02T10:43:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integrating-x-n-with-geometric-sequence-strips/ssssswtj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integrating-x-n-with-geometric-sequence-strips/ssssswtj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integrating-x-n-with-geometric-sequence-strips/ssssswtj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integrating-x-n-with-geometric-sequence-strips/ssssswtj"/>
      <lastmod>2026-11-01T21:54:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integrating-x-n-with-geometric-sequence-strips/ssssswtj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integrating-x-n-with-geometric-sequence-strips/ssssswtj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integrating-x-n-with-geometric-sequence-strips/ssssswtj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integrating-x-n-with-geometric-sequence-strips/ssssswtj"/>
      <lastmod>2026-11-01T21:54:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-linear-inequalities-advanced/ssssswtp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-inequalities-advanced/ssssswtp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-inequalities-advanced/ssssswtp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-inequalities-advanced/ssssswtp"/>
      <lastmod>2026-11-01T19:15:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-linear-inequalities-advanced/ssssswtp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-inequalities-advanced/ssssswtp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-inequalities-advanced/ssssswtp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-inequalities-advanced/ssssswtp"/>
      <lastmod>2026-11-01T19:15:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-distribution-probability-calculation/ssssswtw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-probability-calculation/ssssswtw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-probability-calculation/ssssswtw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-probability-calculation/ssssswtw"/>
      <lastmod>2026-11-01T22:01:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-distribution-probability-calculation/ssssswtw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-distribution-probability-calculation/ssssswtw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-distribution-probability-calculation/ssssswtw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-distribution-probability-calculation/ssssswtw"/>
      <lastmod>2026-11-01T22:01:21+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/how-to-shift-and-transform-a-parabola/ssssswt6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-to-shift-and-transform-a-parabola/ssssswt6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-to-shift-and-transform-a-parabola/ssssswt6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-to-shift-and-transform-a-parabola/ssssswt6"/>
      <lastmod>2026-11-01T19:20:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/how-to-shift-and-transform-a-parabola/ssssswt6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/how-to-shift-and-transform-a-parabola/ssssswt6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/how-to-shift-and-transform-a-parabola/ssssswt6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/how-to-shift-and-transform-a-parabola/ssssswt6"/>
      <lastmod>2026-11-01T19:20:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tilted-duct-collecting-rain/ssssswtg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tilted-duct-collecting-rain/ssssswtg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tilted-duct-collecting-rain/ssssswtg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tilted-duct-collecting-rain/ssssswtg"/>
      <lastmod>2026-11-02T08:52:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tilted-duct-collecting-rain/ssssswtg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tilted-duct-collecting-rain/ssssswtg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tilted-duct-collecting-rain/ssssswtg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tilted-duct-collecting-rain/ssssswtg"/>
      <lastmod>2026-11-02T08:52:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/error-intervals-practice/ssssswt9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/error-intervals-practice/ssssswt9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/error-intervals-practice/ssssswt9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/error-intervals-practice/ssssswt9"/>
      <lastmod>2026-11-01T20:21:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/error-intervals-practice/ssssswt9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/error-intervals-practice/ssssswt9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/error-intervals-practice/ssssswt9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/error-intervals-practice/ssssswt9"/>
      <lastmod>2026-11-01T20:21:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translated-points-demo/ssssswte</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translated-points-demo/ssssswte"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translated-points-demo/ssssswte"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translated-points-demo/ssssswte"/>
      <lastmod>2026-11-01T21:13:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translated-points-demo/ssssswte</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translated-points-demo/ssssswte"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translated-points-demo/ssssswte"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translated-points-demo/ssssswte"/>
      <lastmod>2026-11-01T21:13:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/octagon-to-square-dissection/ssssswtv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/octagon-to-square-dissection/ssssswtv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/octagon-to-square-dissection/ssssswtv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/octagon-to-square-dissection/ssssswtv"/>
      <lastmod>2026-11-01T21:20:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/octagon-to-square-dissection/ssssswtv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/octagon-to-square-dissection/ssssswtv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/octagon-to-square-dissection/ssssswtv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/octagon-to-square-dissection/ssssswtv"/>
      <lastmod>2026-11-01T21:20:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/stereographic-projection-demonstration/ssssswt4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/stereographic-projection-demonstration/ssssswt4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/stereographic-projection-demonstration/ssssswt4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/stereographic-projection-demonstration/ssssswt4"/>
      <lastmod>2026-11-02T15:51:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/stereographic-projection-demonstration/ssssswt4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/stereographic-projection-demonstration/ssssswt4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/stereographic-projection-demonstration/ssssswt4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/stereographic-projection-demonstration/ssssswt4"/>
      <lastmod>2026-11-02T15:51:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vertical-angles-exploration-by-powere/ssssswtl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-angles-exploration-by-powere/ssssswtl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-angles-exploration-by-powere/ssssswtl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-angles-exploration-by-powere/ssssswtl"/>
      <lastmod>2026-11-02T00:47:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vertical-angles-exploration-by-powere/ssssswtl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-angles-exploration-by-powere/ssssswtl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-angles-exploration-by-powere/ssssswtl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-angles-exploration-by-powere/ssssswtl"/>
      <lastmod>2026-11-02T00:47:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-cube/ssssswty</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cube/ssssswty"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cube/ssssswty"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cube/ssssswty"/>
      <lastmod>2026-11-01T19:14:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-a-cube/ssssswty</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cube/ssssswty"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cube/ssssswty"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cube/ssssswty"/>
      <lastmod>2026-11-01T19:14:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practice-with-segments-lines-and-rays/ssssswta</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-with-segments-lines-and-rays/ssssswta"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-with-segments-lines-and-rays/ssssswta"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-with-segments-lines-and-rays/ssssswta"/>
      <lastmod>2026-11-02T10:59:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practice-with-segments-lines-and-rays/ssssswta</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practice-with-segments-lines-and-rays/ssssswta"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practice-with-segments-lines-and-rays/ssssswta"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practice-with-segments-lines-and-rays/ssssswta"/>
      <lastmod>2026-11-02T10:59:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangle-rotational-symmetry-demo/ssssswtc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-rotational-symmetry-demo/ssssswtc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-rotational-symmetry-demo/ssssswtc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-rotational-symmetry-demo/ssssswtc"/>
      <lastmod>2026-11-02T02:39:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangle-rotational-symmetry-demo/ssssswtc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangle-rotational-symmetry-demo/ssssswtc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangle-rotational-symmetry-demo/ssssswtc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangle-rotational-symmetry-demo/ssssswtc"/>
      <lastmod>2026-11-02T02:39:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/finding-the-area-of-shapes-on-graphs/ssssswtr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-the-area-of-shapes-on-graphs/ssssswtr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-the-area-of-shapes-on-graphs/ssssswtr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-the-area-of-shapes-on-graphs/ssssswtr"/>
      <lastmod>2026-11-02T13:46:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/finding-the-area-of-shapes-on-graphs/ssssswtr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/finding-the-area-of-shapes-on-graphs/ssssswtr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/finding-the-area-of-shapes-on-graphs/ssssswtr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/finding-the-area-of-shapes-on-graphs/ssssswtr"/>
      <lastmod>2026-11-02T13:46:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construction-of-the-game/ssssswth</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-the-game/ssssswth"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-the-game/ssssswth"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-the-game/ssssswth"/>
      <lastmod>2026-11-02T18:41:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construction-of-the-game/ssssswth</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-the-game/ssssswth"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-the-game/ssssswth"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-the-game/ssssswth"/>
      <lastmod>2026-11-02T18:41:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-square-symmetry/ssssswtt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-square-symmetry/ssssswtt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-square-symmetry/ssssswtt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-square-symmetry/ssssswtt"/>
      <lastmod>2026-11-02T09:27:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-square-symmetry/ssssswtt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-square-symmetry/ssssswtt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-square-symmetry/ssssswtt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-square-symmetry/ssssswtt"/>
      <lastmod>2026-11-02T09:27:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/drag-2x3-rectangle-to-fit-in-3x6-frame/ssssswtx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drag-2x3-rectangle-to-fit-in-3x6-frame/ssssswtx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drag-2x3-rectangle-to-fit-in-3x6-frame/ssssswtx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drag-2x3-rectangle-to-fit-in-3x6-frame/ssssswtx"/>
      <lastmod>2026-11-02T00:24:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/drag-2x3-rectangle-to-fit-in-3x6-frame/ssssswtx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/drag-2x3-rectangle-to-fit-in-3x6-frame/ssssswtx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/drag-2x3-rectangle-to-fit-in-3x6-frame/ssssswtx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/drag-2x3-rectangle-to-fit-in-3x6-frame/ssssswtx"/>
      <lastmod>2026-11-02T00:24:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-and-circumcircle-construction/ssssswti</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-and-circumcircle-construction/ssssswti"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-and-circumcircle-construction/ssssswti"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-and-circumcircle-construction/ssssswti"/>
      <lastmod>2026-11-02T13:14:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-and-circumcircle-construction/ssssswti</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-and-circumcircle-construction/ssssswti"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-and-circumcircle-construction/ssssswti"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-and-circumcircle-construction/ssssswti"/>
      <lastmod>2026-11-02T13:14:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/3d-cylinder-model/ssssswto</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-cylinder-model/ssssswto"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-cylinder-model/ssssswto"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-cylinder-model/ssssswto"/>
      <lastmod>2026-11-02T17:39:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/3d-cylinder-model/ssssswto</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/3d-cylinder-model/ssssswto"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/3d-cylinder-model/ssssswto"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/3d-cylinder-model/ssssswto"/>
      <lastmod>2026-11-02T17:39:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-a-pyramid-by-the-cube/ssssswxs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-pyramid-by-the-cube/ssssswxs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-pyramid-by-the-cube/ssssswxs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-pyramid-by-the-cube/ssssswxs"/>
      <lastmod>2026-11-01T21:01:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-a-pyramid-by-the-cube/ssssswxs</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-a-pyramid-by-the-cube/ssssswxs"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-a-pyramid-by-the-cube/ssssswxs"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-a-pyramid-by-the-cube/ssssswxs"/>
      <lastmod>2026-11-01T21:01:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-selecting-balls-by-david-freixes-martorell/ssssswx7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-selecting-balls-by-david-freixes-martorell/ssssswx7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-selecting-balls-by-david-freixes-martorell/ssssswx7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-selecting-balls-by-david-freixes-martorell/ssssswx7"/>
      <lastmod>2026-11-01T23:27:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-selecting-balls-by-david-freixes-martorell/ssssswx7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-selecting-balls-by-david-freixes-martorell/ssssswx7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-selecting-balls-by-david-freixes-martorell/ssssswx7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-selecting-balls-by-david-freixes-martorell/ssssswx7"/>
      <lastmod>2026-11-01T23:27:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-between-two-hyperboloids-of-two-sheets/ssssswxn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-between-two-hyperboloids-of-two-sheets/ssssswxn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-between-two-hyperboloids-of-two-sheets/ssssswxn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-between-two-hyperboloids-of-two-sheets/ssssswxn"/>
      <lastmod>2026-11-01T21:13:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-between-two-hyperboloids-of-two-sheets/ssssswxn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-between-two-hyperboloids-of-two-sheets/ssssswxn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-between-two-hyperboloids-of-two-sheets/ssssswxn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-between-two-hyperboloids-of-two-sheets/ssssswxn"/>
      <lastmod>2026-11-01T21:13:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/venn-diagram-2-sets/ssssswx2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-2-sets/ssssswx2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-2-sets/ssssswx2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-2-sets/ssssswx2"/>
      <lastmod>2026-11-02T17:11:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/venn-diagram-2-sets/ssssswx2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-2-sets/ssssswx2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-2-sets/ssssswx2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-2-sets/ssssswx2"/>
      <lastmod>2026-11-02T17:11:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiplication-questions-and-geometric-analysis/ssssswxk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-questions-and-geometric-analysis/ssssswxk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-questions-and-geometric-analysis/ssssswxk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-questions-and-geometric-analysis/ssssswxk"/>
      <lastmod>2026-11-02T00:21:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiplication-questions-and-geometric-analysis/ssssswxk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiplication-questions-and-geometric-analysis/ssssswxk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiplication-questions-and-geometric-analysis/ssssswxk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiplication-questions-and-geometric-analysis/ssssswxk"/>
      <lastmod>2026-11-02T00:21:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-demonstration-by-ashmita/ssssswxz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-demonstration-by-ashmita/ssssswxz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-demonstration-by-ashmita/ssssswxz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-demonstration-by-ashmita/ssssswxz"/>
      <lastmod>2026-11-02T17:44:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-demonstration-by-ashmita/ssssswxz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-demonstration-by-ashmita/ssssswxz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-demonstration-by-ashmita/ssssswxz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-demonstration-by-ashmita/ssssswxz"/>
      <lastmod>2026-11-02T17:44:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-path-4th-grade-denominators/ssssswx0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-path-4th-grade-denominators/ssssswx0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-path-4th-grade-denominators/ssssswx0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-path-4th-grade-denominators/ssssswx0"/>
      <lastmod>2026-11-02T18:46:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-path-4th-grade-denominators/ssssswx0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-path-4th-grade-denominators/ssssswx0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-path-4th-grade-denominators/ssssswx0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-path-4th-grade-denominators/ssssswx0"/>
      <lastmod>2026-11-02T18:46:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/walls-of-a-room-with-a-door-and-a-window/ssssswxd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/walls-of-a-room-with-a-door-and-a-window/ssssswxd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/walls-of-a-room-with-a-door-and-a-window/ssssswxd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/walls-of-a-room-with-a-door-and-a-window/ssssswxd"/>
      <lastmod>2026-11-01T18:59:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/walls-of-a-room-with-a-door-and-a-window/ssssswxd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/walls-of-a-room-with-a-door-and-a-window/ssssswxd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/walls-of-a-room-with-a-door-and-a-window/ssssswxd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/walls-of-a-room-with-a-door-and-a-window/ssssswxd"/>
      <lastmod>2026-11-01T18:59:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/variable-cube-2/ssssswxf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/variable-cube-2/ssssswxf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/variable-cube-2/ssssswxf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/variable-cube-2/ssssswxf"/>
      <lastmod>2026-11-02T09:47:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/variable-cube-2/ssssswxf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/variable-cube-2/ssssswxf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/variable-cube-2/ssssswxf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/variable-cube-2/ssssswxf"/>
      <lastmod>2026-11-02T09:47:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponent-problem-demonstration/ssssswx8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-problem-demonstration/ssssswx8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-problem-demonstration/ssssswx8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-problem-demonstration/ssssswx8"/>
      <lastmod>2026-11-02T18:47:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponent-problem-demonstration/ssssswx8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponent-problem-demonstration/ssssswx8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponent-problem-demonstration/ssssswx8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponent-problem-demonstration/ssssswx8"/>
      <lastmod>2026-11-02T18:47:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/copying-a-segment-geometric-construction/ssssswxu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copying-a-segment-geometric-construction/ssssswxu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copying-a-segment-geometric-construction/ssssswxu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copying-a-segment-geometric-construction/ssssswxu"/>
      <lastmod>2026-11-02T08:54:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/copying-a-segment-geometric-construction/ssssswxu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copying-a-segment-geometric-construction/ssssswxu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copying-a-segment-geometric-construction/ssssswxu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copying-a-segment-geometric-construction/ssssswxu"/>
      <lastmod>2026-11-02T08:54:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/newton-s-method-by-andrew-cooper/ssssswx5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/newton-s-method-by-andrew-cooper/ssssswx5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/newton-s-method-by-andrew-cooper/ssssswx5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/newton-s-method-by-andrew-cooper/ssssswx5"/>
      <lastmod>2026-11-02T17:34:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/newton-s-method-by-andrew-cooper/ssssswx5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/newton-s-method-by-andrew-cooper/ssssswx5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/newton-s-method-by-andrew-cooper/ssssswx5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/newton-s-method-by-andrew-cooper/ssssswx5"/>
      <lastmod>2026-11-02T17:34:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-linear-equations-on-the-number-line/ssssswxb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-equations-on-the-number-line/ssssswxb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-equations-on-the-number-line/ssssswxb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-equations-on-the-number-line/ssssswxb"/>
      <lastmod>2026-11-02T16:54:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-linear-equations-on-the-number-line/ssssswxb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-equations-on-the-number-line/ssssswxb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-equations-on-the-number-line/ssssswxb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-equations-on-the-number-line/ssssswxb"/>
      <lastmod>2026-11-02T16:54:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformational-geometry-exercise-proving-segments-congruent/ssssswx3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformational-geometry-exercise-proving-segments-congruent/ssssswx3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformational-geometry-exercise-proving-segments-congruent/ssssswx3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformational-geometry-exercise-proving-segments-congruent/ssssswx3"/>
      <lastmod>2026-11-01T23:21:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformational-geometry-exercise-proving-segments-congruent/ssssswx3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformational-geometry-exercise-proving-segments-congruent/ssssswx3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformational-geometry-exercise-proving-segments-congruent/ssssswx3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformational-geometry-exercise-proving-segments-congruent/ssssswx3"/>
      <lastmod>2026-11-01T23:21:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/apple-fractions/ssssswxq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/apple-fractions/ssssswxq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/apple-fractions/ssssswxq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/apple-fractions/ssssswxq"/>
      <lastmod>2026-11-01T19:01:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/apple-fractions/ssssswxq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/apple-fractions/ssssswxq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/apple-fractions/ssssswxq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/apple-fractions/ssssswxq"/>
      <lastmod>2026-11-01T19:01:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-cross-section/ssssswx1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-cross-section/ssssswx1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-cross-section/ssssswx1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-cross-section/ssssswx1"/>
      <lastmod>2026-11-01T21:56:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-cross-section/ssssswx1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-cross-section/ssssswx1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-cross-section/ssssswx1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-cross-section/ssssswx1"/>
      <lastmod>2026-11-01T21:56:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/three-dimensional-objects-with-the-same-volume/ssssswxm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-dimensional-objects-with-the-same-volume/ssssswxm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-dimensional-objects-with-the-same-volume/ssssswxm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-dimensional-objects-with-the-same-volume/ssssswxm"/>
      <lastmod>2026-11-02T08:59:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/three-dimensional-objects-with-the-same-volume/ssssswxm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-dimensional-objects-with-the-same-volume/ssssswxm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-dimensional-objects-with-the-same-volume/ssssswxm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-dimensional-objects-with-the-same-volume/ssssswxm"/>
      <lastmod>2026-11-02T08:59:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-roots-of-polynomials/ssssswxj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-roots-of-polynomials/ssssswxj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-roots-of-polynomials/ssssswxj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-roots-of-polynomials/ssssswxj"/>
      <lastmod>2026-11-02T18:30:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-roots-of-polynomials/ssssswxj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-roots-of-polynomials/ssssswxj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-roots-of-polynomials/ssssswxj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-roots-of-polynomials/ssssswxj"/>
      <lastmod>2026-11-02T18:30:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/islamic-polygons/ssssswxp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-polygons/ssssswxp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-polygons/ssssswxp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-polygons/ssssswxp"/>
      <lastmod>2026-11-01T21:49:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/islamic-polygons/ssssswxp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-polygons/ssssswxp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-polygons/ssssswxp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-polygons/ssssswxp"/>
      <lastmod>2026-11-01T21:49:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/straight-line-graphs-dynamic-slope-and-intercept-exploration/ssssswxw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/straight-line-graphs-dynamic-slope-and-intercept-exploration/ssssswxw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/straight-line-graphs-dynamic-slope-and-intercept-exploration/ssssswxw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/straight-line-graphs-dynamic-slope-and-intercept-exploration/ssssswxw"/>
      <lastmod>2026-11-02T18:00:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/straight-line-graphs-dynamic-slope-and-intercept-exploration/ssssswxw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/straight-line-graphs-dynamic-slope-and-intercept-exploration/ssssswxw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/straight-line-graphs-dynamic-slope-and-intercept-exploration/ssssswxw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/straight-line-graphs-dynamic-slope-and-intercept-exploration/ssssswxw"/>
      <lastmod>2026-11-02T18:00:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangular-pyramid-by-anne-k-smaa/ssssswx6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-pyramid-by-anne-k-smaa/ssssswx6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-pyramid-by-anne-k-smaa/ssssswx6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-pyramid-by-anne-k-smaa/ssssswx6"/>
      <lastmod>2026-11-01T19:31:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangular-pyramid-by-anne-k-smaa/ssssswx6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-pyramid-by-anne-k-smaa/ssssswx6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-pyramid-by-anne-k-smaa/ssssswx6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-pyramid-by-anne-k-smaa/ssssswx6"/>
      <lastmod>2026-11-01T19:31:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/distance-in-the-coordinate-plane-quiz/ssssswxg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-in-the-coordinate-plane-quiz/ssssswxg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-in-the-coordinate-plane-quiz/ssssswxg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-in-the-coordinate-plane-quiz/ssssswxg"/>
      <lastmod>2026-11-02T00:48:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/distance-in-the-coordinate-plane-quiz/ssssswxg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-in-the-coordinate-plane-quiz/ssssswxg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-in-the-coordinate-plane-quiz/ssssswxg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-in-the-coordinate-plane-quiz/ssssswxg"/>
      <lastmod>2026-11-02T00:48:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/probability-mass-function-of-a-poisson-distribution/ssssswx9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-mass-function-of-a-poisson-distribution/ssssswx9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-mass-function-of-a-poisson-distribution/ssssswx9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-mass-function-of-a-poisson-distribution/ssssswx9"/>
      <lastmod>2026-11-01T23:14:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/probability-mass-function-of-a-poisson-distribution/ssssswx9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/probability-mass-function-of-a-poisson-distribution/ssssswx9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/probability-mass-function-of-a-poisson-distribution/ssssswx9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/probability-mass-function-of-a-poisson-distribution/ssssswx9"/>
      <lastmod>2026-11-01T23:14:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformation-matrices/ssssswxe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformation-matrices/ssssswxe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformation-matrices/ssssswxe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformation-matrices/ssssswxe"/>
      <lastmod>2026-11-02T16:56:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformation-matrices/ssssswxe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformation-matrices/ssssswxe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformation-matrices/ssssswxe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformation-matrices/ssssswxe"/>
      <lastmod>2026-11-02T16:56:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-simulation/ssssswxv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-simulation/ssssswxv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temperature-vs-time-multiplication-simulation/ssssswxv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-simulation/ssssswxv"/>
      <lastmod>2026-11-02T09:39:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/temperature-vs-time-multiplication-simulation/ssssswxv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-simulation/ssssswxv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/temperature-vs-time-multiplication-simulation/ssssswxv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/temperature-vs-time-multiplication-simulation/ssssswxv"/>
      <lastmod>2026-11-02T09:39:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-introduction-to-slope/ssssswx4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-introduction-to-slope/ssssswx4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-introduction-to-slope/ssssswx4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-introduction-to-slope/ssssswx4"/>
      <lastmod>2026-11-01T21:20:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-introduction-to-slope/ssssswx4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-introduction-to-slope/ssssswx4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-introduction-to-slope/ssssswx4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-introduction-to-slope/ssssswx4"/>
      <lastmod>2026-11-01T21:20:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/powers-of-complex-numbers-and-their-conjugates/ssssswxl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/powers-of-complex-numbers-and-their-conjugates/ssssswxl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/powers-of-complex-numbers-and-their-conjugates/ssssswxl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/powers-of-complex-numbers-and-their-conjugates/ssssswxl"/>
      <lastmod>2026-11-01T23:16:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/powers-of-complex-numbers-and-their-conjugates/ssssswxl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/powers-of-complex-numbers-and-their-conjugates/ssssswxl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/powers-of-complex-numbers-and-their-conjugates/ssssswxl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/powers-of-complex-numbers-and-their-conjugates/ssssswxl"/>
      <lastmod>2026-11-01T23:16:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/2d-affine-transformations/ssssswxy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-affine-transformations/ssssswxy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-affine-transformations/ssssswxy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-affine-transformations/ssssswxy"/>
      <lastmod>2026-11-02T18:59:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/2d-affine-transformations/ssssswxy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/2d-affine-transformations/ssssswxy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/2d-affine-transformations/ssssswxy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/2d-affine-transformations/ssssswxy"/>
      <lastmod>2026-11-02T18:59:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/modular-addition-for-selected-mods/ssssswxa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modular-addition-for-selected-mods/ssssswxa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modular-addition-for-selected-mods/ssssswxa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modular-addition-for-selected-mods/ssssswxa"/>
      <lastmod>2026-11-02T18:31:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/modular-addition-for-selected-mods/ssssswxa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/modular-addition-for-selected-mods/ssssswxa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/modular-addition-for-selected-mods/ssssswxa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/modular-addition-for-selected-mods/ssssswxa"/>
      <lastmod>2026-11-02T18:31:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezoidal-sum-for-area-estimation/ssssswxc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoidal-sum-for-area-estimation/ssssswxc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoidal-sum-for-area-estimation/ssssswxc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoidal-sum-for-area-estimation/ssssswxc"/>
      <lastmod>2026-11-01T19:03:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezoidal-sum-for-area-estimation/ssssswxc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezoidal-sum-for-area-estimation/ssssswxc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezoidal-sum-for-area-estimation/ssssswxc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezoidal-sum-for-area-estimation/ssssswxc"/>
      <lastmod>2026-11-01T19:03:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-cylinder-volume-calculation/ssssswxr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-cylinder-volume-calculation/ssssswxr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-cylinder-volume-calculation/ssssswxr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-cylinder-volume-calculation/ssssswxr"/>
      <lastmod>2026-11-02T03:12:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-cylinder-volume-calculation/ssssswxr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-cylinder-volume-calculation/ssssswxr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-cylinder-volume-calculation/ssssswxr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-cylinder-volume-calculation/ssssswxr"/>
      <lastmod>2026-11-02T03:12:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vectors-in-naval-battle/ssssswxh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-in-naval-battle/ssssswxh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-in-naval-battle/ssssswxh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-in-naval-battle/ssssswxh"/>
      <lastmod>2026-11-01T19:25:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vectors-in-naval-battle/ssssswxh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-in-naval-battle/ssssswxh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-in-naval-battle/ssssswxh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-in-naval-battle/ssssswxh"/>
      <lastmod>2026-11-01T19:25:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-nine-point-circle/ssssswxt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-nine-point-circle/ssssswxt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-nine-point-circle/ssssswxt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-nine-point-circle/ssssswxt"/>
      <lastmod>2026-11-01T20:49:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-nine-point-circle/ssssswxt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-nine-point-circle/ssssswxt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-nine-point-circle/ssssswxt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-nine-point-circle/ssssswxt"/>
      <lastmod>2026-11-01T20:49:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/relationship-between-base-length-and-volume-of-a-square-pyramid-lr8-01-xt2/ssssswxx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relationship-between-base-length-and-volume-of-a-square-pyramid-lr8-01-xt2/ssssswxx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relationship-between-base-length-and-volume-of-a-square-pyramid-lr8-01-xt2/ssssswxx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relationship-between-base-length-and-volume-of-a-square-pyramid-lr8-01-xt2/ssssswxx"/>
      <lastmod>2026-11-01T22:10:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/relationship-between-base-length-and-volume-of-a-square-pyramid-lr8-01-xt2/ssssswxx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/relationship-between-base-length-and-volume-of-a-square-pyramid-lr8-01-xt2/ssssswxx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/relationship-between-base-length-and-volume-of-a-square-pyramid-lr8-01-xt2/ssssswxx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/relationship-between-base-length-and-volume-of-a-square-pyramid-lr8-01-xt2/ssssswxx"/>
      <lastmod>2026-11-01T22:10:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sharing-grains-equally/ssssswxi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sharing-grains-equally/ssssswxi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sharing-grains-equally/ssssswxi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sharing-grains-equally/ssssswxi"/>
      <lastmod>2026-11-02T17:38:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sharing-grains-equally/ssssswxi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sharing-grains-equally/ssssswxi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sharing-grains-equally/ssssswxi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sharing-grains-equally/ssssswxi"/>
      <lastmod>2026-11-02T17:38:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reciprocal-derivative-transformation-graph/ssssswxo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reciprocal-derivative-transformation-graph/ssssswxo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reciprocal-derivative-transformation-graph/ssssswxo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reciprocal-derivative-transformation-graph/ssssswxo"/>
      <lastmod>2026-11-01T19:27:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reciprocal-derivative-transformation-graph/ssssswxo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reciprocal-derivative-transformation-graph/ssssswxo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reciprocal-derivative-transformation-graph/ssssswxo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reciprocal-derivative-transformation-graph/ssssswxo"/>
      <lastmod>2026-11-01T19:27:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-eccentricity-dynamic-demo/ssssswis</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-eccentricity-dynamic-demo/ssssswis"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-eccentricity-dynamic-demo/ssssswis"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-eccentricity-dynamic-demo/ssssswis"/>
      <lastmod>2026-11-02T00:45:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-eccentricity-dynamic-demo/ssssswis</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-eccentricity-dynamic-demo/ssssswis"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-eccentricity-dynamic-demo/ssssswis"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-eccentricity-dynamic-demo/ssssswis"/>
      <lastmod>2026-11-02T00:45:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-sphere-via-integral-dynamic-construction/ssssswi7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-sphere-via-integral-dynamic-construction/ssssswi7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-sphere-via-integral-dynamic-construction/ssssswi7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-sphere-via-integral-dynamic-construction/ssssswi7"/>
      <lastmod>2026-11-01T19:18:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-sphere-via-integral-dynamic-construction/ssssswi7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-sphere-via-integral-dynamic-construction/ssssswi7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-sphere-via-integral-dynamic-construction/ssssswi7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-sphere-via-integral-dynamic-construction/ssssswi7"/>
      <lastmod>2026-11-01T19:18:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/first-order-differential-equation-with-slopefield/ssssswin</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/first-order-differential-equation-with-slopefield/ssssswin"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/first-order-differential-equation-with-slopefield/ssssswin"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/first-order-differential-equation-with-slopefield/ssssswin"/>
      <lastmod>2026-11-02T02:35:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/first-order-differential-equation-with-slopefield/ssssswin</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/first-order-differential-equation-with-slopefield/ssssswin"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/first-order-differential-equation-with-slopefield/ssssswin"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/first-order-differential-equation-with-slopefield/ssssswin"/>
      <lastmod>2026-11-02T02:35:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/introduction-to-trigonometric-functions-and-ratios/ssssswi2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-trigonometric-functions-and-ratios/ssssswi2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-trigonometric-functions-and-ratios/ssssswi2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-trigonometric-functions-and-ratios/ssssswi2"/>
      <lastmod>2026-11-02T17:08:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/introduction-to-trigonometric-functions-and-ratios/ssssswi2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/introduction-to-trigonometric-functions-and-ratios/ssssswi2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/introduction-to-trigonometric-functions-and-ratios/ssssswi2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/introduction-to-trigonometric-functions-and-ratios/ssssswi2"/>
      <lastmod>2026-11-02T17:08:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animation-of-circles-with-parametric-curves/ssssswik</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-of-circles-with-parametric-curves/ssssswik"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-of-circles-with-parametric-curves/ssssswik"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-of-circles-with-parametric-curves/ssssswik"/>
      <lastmod>2026-11-02T00:22:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animation-of-circles-with-parametric-curves/ssssswik</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animation-of-circles-with-parametric-curves/ssssswik"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animation-of-circles-with-parametric-curves/ssssswik"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animation-of-circles-with-parametric-curves/ssssswik"/>
      <lastmod>2026-11-02T00:22:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proclus-ellipse-drawer/ssssswiz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proclus-ellipse-drawer/ssssswiz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proclus-ellipse-drawer/ssssswiz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proclus-ellipse-drawer/ssssswiz"/>
      <lastmod>2026-11-02T18:06:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proclus-ellipse-drawer/ssssswiz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proclus-ellipse-drawer/ssssswiz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proclus-ellipse-drawer/ssssswiz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proclus-ellipse-drawer/ssssswiz"/>
      <lastmod>2026-11-02T18:06:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sum-of-interior-angles-of-a-pentagon-by-leslie-pedroza/ssssswi0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-interior-angles-of-a-pentagon-by-leslie-pedroza/ssssswi0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-interior-angles-of-a-pentagon-by-leslie-pedroza/ssssswi0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-interior-angles-of-a-pentagon-by-leslie-pedroza/ssssswi0"/>
      <lastmod>2026-11-01T19:20:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sum-of-interior-angles-of-a-pentagon-by-leslie-pedroza/ssssswi0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sum-of-interior-angles-of-a-pentagon-by-leslie-pedroza/ssssswi0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sum-of-interior-angles-of-a-pentagon-by-leslie-pedroza/ssssswi0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sum-of-interior-angles-of-a-pentagon-by-leslie-pedroza/ssssswi0"/>
      <lastmod>2026-11-01T19:20:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/calculate-the-area-of-the-composite-shape/ssssswid</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculate-the-area-of-the-composite-shape/ssssswid"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculate-the-area-of-the-composite-shape/ssssswid"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculate-the-area-of-the-composite-shape/ssssswid"/>
      <lastmod>2026-11-02T08:47:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/calculate-the-area-of-the-composite-shape/ssssswid</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculate-the-area-of-the-composite-shape/ssssswid"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculate-the-area-of-the-composite-shape/ssssswid"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculate-the-area-of-the-composite-shape/ssssswid"/>
      <lastmod>2026-11-02T08:47:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/compare-sine-function-transformations/ssssswif</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-sine-function-transformations/ssssswif"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-sine-function-transformations/ssssswif"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-sine-function-transformations/ssssswif"/>
      <lastmod>2026-11-02T16:45:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/compare-sine-function-transformations/ssssswif</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/compare-sine-function-transformations/ssssswif"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/compare-sine-function-transformations/ssssswif"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/compare-sine-function-transformations/ssssswif"/>
      <lastmod>2026-11-02T16:45:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graph-of-f-x-cos-x/ssssswi8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-of-f-x-cos-x/ssssswi8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-of-f-x-cos-x/ssssswi8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-of-f-x-cos-x/ssssswi8"/>
      <lastmod>2026-11-02T02:43:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graph-of-f-x-cos-x/ssssswi8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graph-of-f-x-cos-x/ssssswi8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graph-of-f-x-cos-x/ssssswi8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graph-of-f-x-cos-x/ssssswi8"/>
      <lastmod>2026-11-02T02:43:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polygon-angle-discovery/ssssswiu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-angle-discovery/ssssswiu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-angle-discovery/ssssswiu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-angle-discovery/ssssswiu"/>
      <lastmod>2026-11-02T03:02:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polygon-angle-discovery/ssssswiu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polygon-angle-discovery/ssssswiu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polygon-angle-discovery/ssssswiu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polygon-angle-discovery/ssssswiu"/>
      <lastmod>2026-11-02T03:02:16+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/isosceles-trapezoids-by-courtney-o-berry/ssssswi5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoids-by-courtney-o-berry/ssssswi5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoids-by-courtney-o-berry/ssssswi5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoids-by-courtney-o-berry/ssssswi5"/>
      <lastmod>2026-11-02T13:38:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/isosceles-trapezoids-by-courtney-o-berry/ssssswi5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/isosceles-trapezoids-by-courtney-o-berry/ssssswi5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/isosceles-trapezoids-by-courtney-o-berry/ssssswi5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/isosceles-trapezoids-by-courtney-o-berry/ssssswi5"/>
      <lastmod>2026-11-02T13:38:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-quadratic-functions-in-vertex-form/ssssswib</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-in-vertex-form/ssssswib"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-functions-in-vertex-form/ssssswib"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-in-vertex-form/ssssswib"/>
      <lastmod>2026-11-01T21:50:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-quadratic-functions-in-vertex-form/ssssswib</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-in-vertex-form/ssssswib"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-quadratic-functions-in-vertex-form/ssssswib"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-quadratic-functions-in-vertex-form/ssssswib"/>
      <lastmod>2026-11-01T21:50:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-bisectors-in-triangles/ssssswi3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisectors-in-triangles/ssssswi3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisectors-in-triangles/ssssswi3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisectors-in-triangles/ssssswi3"/>
      <lastmod>2026-11-01T21:26:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-bisectors-in-triangles/ssssswi3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisectors-in-triangles/ssssswi3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisectors-in-triangles/ssssswi3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisectors-in-triangles/ssssswi3"/>
      <lastmod>2026-11-01T21:26:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quiz-sketching-angles-in-standard-position/ssssswiq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-sketching-angles-in-standard-position/ssssswiq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-sketching-angles-in-standard-position/ssssswiq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-sketching-angles-in-standard-position/ssssswiq"/>
      <lastmod>2026-11-01T19:32:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quiz-sketching-angles-in-standard-position/ssssswiq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quiz-sketching-angles-in-standard-position/ssssswiq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quiz-sketching-angles-in-standard-position/ssssswiq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quiz-sketching-angles-in-standard-position/ssssswiq"/>
      <lastmod>2026-11-01T19:32:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-similar-right-triangles-by-tim-brzezinski/ssssswi1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-similar-right-triangles-by-tim-brzezinski/ssssswi1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-similar-right-triangles-by-tim-brzezinski/ssssswi1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-similar-right-triangles-by-tim-brzezinski/ssssswi1"/>
      <lastmod>2026-11-02T09:43:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-similar-right-triangles-by-tim-brzezinski/ssssswi1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-similar-right-triangles-by-tim-brzezinski/ssssswi1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-similar-right-triangles-by-tim-brzezinski/ssssswi1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-similar-right-triangles-by-tim-brzezinski/ssssswi1"/>
      <lastmod>2026-11-02T09:43:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/integration-formula-interactive-practice/ssssswim</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integration-formula-interactive-practice/ssssswim"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integration-formula-interactive-practice/ssssswim"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integration-formula-interactive-practice/ssssswim"/>
      <lastmod>2026-11-01T23:37:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/integration-formula-interactive-practice/ssssswim</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/integration-formula-interactive-practice/ssssswim"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/integration-formula-interactive-practice/ssssswim"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/integration-formula-interactive-practice/ssssswim"/>
      <lastmod>2026-11-01T23:37:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/point-line-position-relationship-exploration/ssssswij</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-line-position-relationship-exploration/ssssswij"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-line-position-relationship-exploration/ssssswij"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-line-position-relationship-exploration/ssssswij"/>
      <lastmod>2026-11-02T10:36:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/point-line-position-relationship-exploration/ssssswij</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-line-position-relationship-exploration/ssssswij"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-line-position-relationship-exploration/ssssswij"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-line-position-relationship-exploration/ssssswij"/>
      <lastmod>2026-11-02T10:36:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/nature-of-the-roots-example-1/ssssswip</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nature-of-the-roots-example-1/ssssswip"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nature-of-the-roots-example-1/ssssswip"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nature-of-the-roots-example-1/ssssswip"/>
      <lastmod>2026-11-02T15:48:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/nature-of-the-roots-example-1/ssssswip</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/nature-of-the-roots-example-1/ssssswip"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/nature-of-the-roots-example-1/ssssswip"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/nature-of-the-roots-example-1/ssssswip"/>
      <lastmod>2026-11-02T15:48:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/multiply-by-3-with-dice/ssssswiw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiply-by-3-with-dice/ssssswiw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiply-by-3-with-dice/ssssswiw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiply-by-3-with-dice/ssssswiw"/>
      <lastmod>2026-11-01T19:20:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/multiply-by-3-with-dice/ssssswiw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/multiply-by-3-with-dice/ssssswiw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/multiply-by-3-with-dice/ssssswiw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/multiply-by-3-with-dice/ssssswiw"/>
      <lastmod>2026-11-01T19:20:56+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sas-triangle-congruence-exploration/ssssswi6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sas-triangle-congruence-exploration/ssssswi6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sas-triangle-congruence-exploration/ssssswi6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sas-triangle-congruence-exploration/ssssswi6"/>
      <lastmod>2026-11-01T21:25:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sas-triangle-congruence-exploration/ssssswi6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sas-triangle-congruence-exploration/ssssswi6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sas-triangle-congruence-exploration/ssssswi6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sas-triangle-congruence-exploration/ssssswi6"/>
      <lastmod>2026-11-01T21:25:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-of-cylinder-vs-cone-part-1/ssssswig</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-cylinder-vs-cone-part-1/ssssswig"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-cylinder-vs-cone-part-1/ssssswig"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-cylinder-vs-cone-part-1/ssssswig"/>
      <lastmod>2026-11-01T20:47:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-of-cylinder-vs-cone-part-1/ssssswig</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-of-cylinder-vs-cone-part-1/ssssswig"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-of-cylinder-vs-cone-part-1/ssssswig"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-of-cylinder-vs-cone-part-1/ssssswig"/>
      <lastmod>2026-11-01T20:47:52+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-a-plane-and-a-cube/ssssswi9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-a-plane-and-a-cube/ssssswi9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-a-plane-and-a-cube/ssssswi9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-a-plane-and-a-cube/ssssswi9"/>
      <lastmod>2026-11-01T23:47:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-a-plane-and-a-cube/ssssswi9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-a-plane-and-a-cube/ssssswi9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-a-plane-and-a-cube/ssssswi9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-a-plane-and-a-cube/ssssswi9"/>
      <lastmod>2026-11-01T23:47:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadrilateral-can-you-draw-it/ssssswie</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-can-you-draw-it/ssssswie"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-can-you-draw-it/ssssswie"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-can-you-draw-it/ssssswie"/>
      <lastmod>2026-11-02T17:57:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadrilateral-can-you-draw-it/ssssswie</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadrilateral-can-you-draw-it/ssssswie"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadrilateral-can-you-draw-it/ssssswie"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadrilateral-can-you-draw-it/ssssswie"/>
      <lastmod>2026-11-02T17:57:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-4/ssssswiv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-4/ssssswiv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-illustration-by-tim-brzezinski-4/ssssswiv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-4/ssssswiv"/>
      <lastmod>2026-11-02T09:46:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-geometry-illustration-by-tim-brzezinski-4/ssssswiv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-4/ssssswiv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-geometry-illustration-by-tim-brzezinski-4/ssssswiv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-geometry-illustration-by-tim-brzezinski-4/ssssswiv"/>
      <lastmod>2026-11-02T09:46:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/powers-of-complex-numbers-by-judah-l-schwartz-2/ssssswi4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/powers-of-complex-numbers-by-judah-l-schwartz-2/ssssswi4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/powers-of-complex-numbers-by-judah-l-schwartz-2/ssssswi4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/powers-of-complex-numbers-by-judah-l-schwartz-2/ssssswi4"/>
      <lastmod>2026-11-02T02:58:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/powers-of-complex-numbers-by-judah-l-schwartz-2/ssssswi4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/powers-of-complex-numbers-by-judah-l-schwartz-2/ssssswi4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/powers-of-complex-numbers-by-judah-l-schwartz-2/ssssswi4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/powers-of-complex-numbers-by-judah-l-schwartz-2/ssssswi4"/>
      <lastmod>2026-11-02T02:58:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/blank-construction-full-toolbar/ssssswil</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/blank-construction-full-toolbar/ssssswil"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/blank-construction-full-toolbar/ssssswil"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/blank-construction-full-toolbar/ssssswil"/>
      <lastmod>2026-11-02T16:41:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/blank-construction-full-toolbar/ssssswil</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/blank-construction-full-toolbar/ssssswil"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/blank-construction-full-toolbar/ssssswil"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/blank-construction-full-toolbar/ssssswil"/>
      <lastmod>2026-11-02T16:41:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/area-and-perimeter-of-a-rectangle-by-s-kay/ssssswiy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-a-rectangle-by-s-kay/ssssswiy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-and-perimeter-of-a-rectangle-by-s-kay/ssssswiy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-a-rectangle-by-s-kay/ssssswiy"/>
      <lastmod>2026-11-01T19:22:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/area-and-perimeter-of-a-rectangle-by-s-kay/ssssswiy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-a-rectangle-by-s-kay/ssssswiy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/area-and-perimeter-of-a-rectangle-by-s-kay/ssssswiy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/area-and-perimeter-of-a-rectangle-by-s-kay/ssssswiy"/>
      <lastmod>2026-11-01T19:22:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solve-simple-linear-equations-ii/ssssswia</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solve-simple-linear-equations-ii/ssssswia"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solve-simple-linear-equations-ii/ssssswia"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solve-simple-linear-equations-ii/ssssswia"/>
      <lastmod>2026-11-02T12:44:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solve-simple-linear-equations-ii/ssssswia</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solve-simple-linear-equations-ii/ssssswia"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solve-simple-linear-equations-ii/ssssswia"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solve-simple-linear-equations-ii/ssssswia"/>
      <lastmod>2026-11-02T12:44:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exterior-angles-of-a-triangle-activity/ssssswic</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angles-of-a-triangle-activity/ssssswic"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angles-of-a-triangle-activity/ssssswic"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angles-of-a-triangle-activity/ssssswic"/>
      <lastmod>2026-11-02T18:08:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exterior-angles-of-a-triangle-activity/ssssswic</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angles-of-a-triangle-activity/ssssswic"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angles-of-a-triangle-activity/ssssswic"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angles-of-a-triangle-activity/ssssswic"/>
      <lastmod>2026-11-02T18:08:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/open-middle-challenge-how-close-to-perpendicular-can-you-get/ssssswir</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/open-middle-challenge-how-close-to-perpendicular-can-you-get/ssssswir"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/open-middle-challenge-how-close-to-perpendicular-can-you-get/ssssswir"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/open-middle-challenge-how-close-to-perpendicular-can-you-get/ssssswir"/>
      <lastmod>2026-11-01T19:08:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/open-middle-challenge-how-close-to-perpendicular-can-you-get/ssssswir</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/open-middle-challenge-how-close-to-perpendicular-can-you-get/ssssswir"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/open-middle-challenge-how-close-to-perpendicular-can-you-get/ssssswir"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/open-middle-challenge-how-close-to-perpendicular-can-you-get/ssssswir"/>
      <lastmod>2026-11-01T19:08:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-volume-by-cross-section-problems/ssssswih</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-volume-by-cross-section-problems/ssssswih"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-volume-by-cross-section-problems/ssssswih"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-volume-by-cross-section-problems/ssssswih"/>
      <lastmod>2026-11-02T15:10:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-volume-by-cross-section-problems/ssssswih</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-volume-by-cross-section-problems/ssssswih"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-volume-by-cross-section-problems/ssssswih"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-volume-by-cross-section-problems/ssssswih"/>
      <lastmod>2026-11-02T15:10:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-introduction/ssssswit</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-introduction/ssssswit"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-introduction/ssssswit"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-introduction/ssssswit"/>
      <lastmod>2026-11-02T18:02:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-introduction/ssssswit</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-introduction/ssssswit"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-introduction/ssssswit"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-introduction/ssssswit"/>
      <lastmod>2026-11-02T18:02:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-functions-dynamic-demo-exploring-slope-and-intercept/ssssswix</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions-dynamic-demo-exploring-slope-and-intercept/ssssswix"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions-dynamic-demo-exploring-slope-and-intercept/ssssswix"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions-dynamic-demo-exploring-slope-and-intercept/ssssswix"/>
      <lastmod>2026-11-02T00:03:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-functions-dynamic-demo-exploring-slope-and-intercept/ssssswix</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions-dynamic-demo-exploring-slope-and-intercept/ssssswix"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions-dynamic-demo-exploring-slope-and-intercept/ssssswix"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions-dynamic-demo-exploring-slope-and-intercept/ssssswix"/>
      <lastmod>2026-11-02T00:03:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-lines-in-slope-intercept-form/ssssswii</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-lines-in-slope-intercept-form/ssssswii"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-lines-in-slope-intercept-form/ssssswii"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-lines-in-slope-intercept-form/ssssswii"/>
      <lastmod>2026-11-02T09:26:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-lines-in-slope-intercept-form/ssssswii</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-lines-in-slope-intercept-form/ssssswii"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-lines-in-slope-intercept-form/ssssswii"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-lines-in-slope-intercept-form/ssssswii"/>
      <lastmod>2026-11-02T09:26:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/counting-stars-1-to-13-scored/ssssswio</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/counting-stars-1-to-13-scored/ssssswio"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/counting-stars-1-to-13-scored/ssssswio"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/counting-stars-1-to-13-scored/ssssswio"/>
      <lastmod>2026-11-02T18:43:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/counting-stars-1-to-13-scored/ssssswio</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/counting-stars-1-to-13-scored/ssssswio"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/counting-stars-1-to-13-scored/ssssswio"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/counting-stars-1-to-13-scored/ssssswio"/>
      <lastmod>2026-11-02T18:43:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/symmetry-of-two-points-in-sphere-cylinder/ssssswos</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-of-two-points-in-sphere-cylinder/ssssswos"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-of-two-points-in-sphere-cylinder/ssssswos"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-of-two-points-in-sphere-cylinder/ssssswos"/>
      <lastmod>2026-11-02T02:24:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/symmetry-of-two-points-in-sphere-cylinder/ssssswos</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/symmetry-of-two-points-in-sphere-cylinder/ssssswos"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/symmetry-of-two-points-in-sphere-cylinder/ssssswos"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/symmetry-of-two-points-in-sphere-cylinder/ssssswos"/>
      <lastmod>2026-11-02T02:24:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parallelograms-discovery-labs/ssssswo7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelograms-discovery-labs/ssssswo7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelograms-discovery-labs/ssssswo7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelograms-discovery-labs/ssssswo7"/>
      <lastmod>2026-11-01T19:34:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parallelograms-discovery-labs/ssssswo7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parallelograms-discovery-labs/ssssswo7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parallelograms-discovery-labs/ssssswo7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parallelograms-discovery-labs/ssssswo7"/>
      <lastmod>2026-11-01T19:34:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-7-5-2-practice-changing-temperatures/ssssswon</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-5-2-practice-changing-temperatures/ssssswon"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-5-2-practice-changing-temperatures/ssssswon"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-5-2-practice-changing-temperatures/ssssswon"/>
      <lastmod>2026-11-01T20:21:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-7-5-2-practice-changing-temperatures/ssssswon</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-5-2-practice-changing-temperatures/ssssswon"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-5-2-practice-changing-temperatures/ssssswon"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-5-2-practice-changing-temperatures/ssssswon"/>
      <lastmod>2026-11-01T20:21:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sss-triangle-demo/ssssswo2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-triangle-demo/ssssswo2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-triangle-demo/ssssswo2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-triangle-demo/ssssswo2"/>
      <lastmod>2026-11-02T17:54:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sss-triangle-demo/ssssswo2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sss-triangle-demo/ssssswo2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sss-triangle-demo/ssssswo2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sss-triangle-demo/ssssswo2"/>
      <lastmod>2026-11-02T17:54:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-net-geometric-and-function-visualization/ssssswok</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-net-geometric-and-function-visualization/ssssswok"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-net-geometric-and-function-visualization/ssssswok"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-net-geometric-and-function-visualization/ssssswok"/>
      <lastmod>2026-11-02T02:48:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-net-geometric-and-function-visualization/ssssswok</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-net-geometric-and-function-visualization/ssssswok"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-net-geometric-and-function-visualization/ssssswok"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-net-geometric-and-function-visualization/ssssswok"/>
      <lastmod>2026-11-02T02:48:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trapezium-dimensions/ssssswoz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-dimensions/ssssswoz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-dimensions/ssssswoz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-dimensions/ssssswoz"/>
      <lastmod>2026-11-02T16:44:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trapezium-dimensions/ssssswoz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trapezium-dimensions/ssssswoz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trapezium-dimensions/ssssswoz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trapezium-dimensions/ssssswoz"/>
      <lastmod>2026-11-02T16:44:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/impossible-figures/ssssswo0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/impossible-figures/ssssswo0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/impossible-figures/ssssswo0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/impossible-figures/ssssswo0"/>
      <lastmod>2026-11-01T22:12:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/impossible-figures/ssssswo0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/impossible-figures/ssssswo0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/impossible-figures/ssssswo0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/impossible-figures/ssssswo0"/>
      <lastmod>2026-11-01T22:12:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/derivative-function-with-tangent/ssssswod</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-function-with-tangent/ssssswod"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-function-with-tangent/ssssswod"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-function-with-tangent/ssssswod"/>
      <lastmod>2026-11-02T17:13:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/derivative-function-with-tangent/ssssswod</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/derivative-function-with-tangent/ssssswod"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/derivative-function-with-tangent/ssssswod"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/derivative-function-with-tangent/ssssswod"/>
      <lastmod>2026-11-02T17:13:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/set-problem/ssssswof</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/set-problem/ssssswof"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/set-problem/ssssswof"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/set-problem/ssssswof"/>
      <lastmod>2026-11-01T20:43:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/set-problem/ssssswof</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/set-problem/ssssswof"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/set-problem/ssssswof"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/set-problem/ssssswof"/>
      <lastmod>2026-11-01T20:43:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-cross-section-and-surface-of-revolution/ssssswo8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-cross-section-and-surface-of-revolution/ssssswo8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-cross-section-and-surface-of-revolution/ssssswo8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-cross-section-and-surface-of-revolution/ssssswo8"/>
      <lastmod>2026-11-01T21:58:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-cross-section-and-surface-of-revolution/ssssswo8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-cross-section-and-surface-of-revolution/ssssswo8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-cross-section-and-surface-of-revolution/ssssswo8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-cross-section-and-surface-of-revolution/ssssswo8"/>
      <lastmod>2026-11-01T21:58:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-number-arithmetic-and-geometry-visualizing-on-the-argand-diagram/ssssswou</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-arithmetic-and-geometry-visualizing-on-the-argand-diagram/ssssswou"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-arithmetic-and-geometry-visualizing-on-the-argand-diagram/ssssswou"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-arithmetic-and-geometry-visualizing-on-the-argand-diagram/ssssswou"/>
      <lastmod>2026-11-01T21:13:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-number-arithmetic-and-geometry-visualizing-on-the-argand-diagram/ssssswou</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-number-arithmetic-and-geometry-visualizing-on-the-argand-diagram/ssssswou"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-number-arithmetic-and-geometry-visualizing-on-the-argand-diagram/ssssswou"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-number-arithmetic-and-geometry-visualizing-on-the-argand-diagram/ssssswou"/>
      <lastmod>2026-11-01T21:13:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/b-zier-curves-dynamic-construction-and-visualization/ssssswo5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/b-zier-curves-dynamic-construction-and-visualization/ssssswo5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/b-zier-curves-dynamic-construction-and-visualization/ssssswo5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/b-zier-curves-dynamic-construction-and-visualization/ssssswo5"/>
      <lastmod>2026-11-01T19:23:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/b-zier-curves-dynamic-construction-and-visualization/ssssswo5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/b-zier-curves-dynamic-construction-and-visualization/ssssswo5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/b-zier-curves-dynamic-construction-and-visualization/ssssswo5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/b-zier-curves-dynamic-construction-and-visualization/ssssswo5"/>
      <lastmod>2026-11-01T19:23:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/copy-a-given-line-segment-construction/ssssswob</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copy-a-given-line-segment-construction/ssssswob"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copy-a-given-line-segment-construction/ssssswob"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copy-a-given-line-segment-construction/ssssswob"/>
      <lastmod>2026-11-01T21:29:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/copy-a-given-line-segment-construction/ssssswob</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/copy-a-given-line-segment-construction/ssssswob"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/copy-a-given-line-segment-construction/ssssswob"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/copy-a-given-line-segment-construction/ssssswob"/>
      <lastmod>2026-11-01T21:29:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/areas-with-geoboard/ssssswo3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/areas-with-geoboard/ssssswo3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/areas-with-geoboard/ssssswo3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/areas-with-geoboard/ssssswo3"/>
      <lastmod>2026-11-01T20:40:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/areas-with-geoboard/ssssswo3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/areas-with-geoboard/ssssswo3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/areas-with-geoboard/ssssswo3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/areas-with-geoboard/ssssswo3"/>
      <lastmod>2026-11-01T20:40:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-area-and-perimeter/ssssswoq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-area-and-perimeter/ssssswoq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-area-and-perimeter/ssssswoq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-area-and-perimeter/ssssswoq"/>
      <lastmod>2026-11-01T20:54:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-area-and-perimeter/ssssswoq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-area-and-perimeter/ssssswoq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-area-and-perimeter/ssssswoq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-area-and-perimeter/ssssswoq"/>
      <lastmod>2026-11-01T20:54:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/topkapi-scroll-geometric-patterns/ssssswo1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/topkapi-scroll-geometric-patterns/ssssswo1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/topkapi-scroll-geometric-patterns/ssssswo1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/topkapi-scroll-geometric-patterns/ssssswo1"/>
      <lastmod>2026-11-01T21:05:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/topkapi-scroll-geometric-patterns/ssssswo1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/topkapi-scroll-geometric-patterns/ssssswo1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/topkapi-scroll-geometric-patterns/ssssswo1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/topkapi-scroll-geometric-patterns/ssssswo1"/>
      <lastmod>2026-11-01T21:05:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/partial-products-of-1-digit-by-3-digit/ssssswom</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-products-of-1-digit-by-3-digit/ssssswom"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-products-of-1-digit-by-3-digit/ssssswom"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-products-of-1-digit-by-3-digit/ssssswom"/>
      <lastmod>2026-11-02T18:09:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/partial-products-of-1-digit-by-3-digit/ssssswom</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/partial-products-of-1-digit-by-3-digit/ssssswom"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/partial-products-of-1-digit-by-3-digit/ssssswom"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/partial-products-of-1-digit-by-3-digit/ssssswom"/>
      <lastmod>2026-11-02T18:09:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-fraction-comparison-practice-based-on-guillaume-lesprit-s-idea/ssssswoj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-fraction-comparison-practice-based-on-guillaume-lesprit-s-idea/ssssswoj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-fraction-comparison-practice-based-on-guillaume-lesprit-s-idea/ssssswoj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-fraction-comparison-practice-based-on-guillaume-lesprit-s-idea/ssssswoj"/>
      <lastmod>2026-11-02T17:53:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-fraction-comparison-practice-based-on-guillaume-lesprit-s-idea/ssssswoj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-fraction-comparison-practice-based-on-guillaume-lesprit-s-idea/ssssswoj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-fraction-comparison-practice-based-on-guillaume-lesprit-s-idea/ssssswoj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-fraction-comparison-practice-based-on-guillaume-lesprit-s-idea/ssssswoj"/>
      <lastmod>2026-11-02T17:53:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/octagon-to-square-dissection-by-steve-phelps/ssssswop</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/octagon-to-square-dissection-by-steve-phelps/ssssswop"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/octagon-to-square-dissection-by-steve-phelps/ssssswop"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/octagon-to-square-dissection-by-steve-phelps/ssssswop"/>
      <lastmod>2026-11-01T21:30:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/octagon-to-square-dissection-by-steve-phelps/ssssswop</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/octagon-to-square-dissection-by-steve-phelps/ssssswop"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/octagon-to-square-dissection-by-steve-phelps/ssssswop"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/octagon-to-square-dissection-by-steve-phelps/ssssswop"/>
      <lastmod>2026-11-01T21:30:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-orthocenter-by-katieshepherd/ssssswow</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-orthocenter-by-katieshepherd/ssssswow"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-triangle-s-orthocenter-by-katieshepherd/ssssswow"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-orthocenter-by-katieshepherd/ssssswow"/>
      <lastmod>2026-11-01T23:56:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-triangle-s-orthocenter-by-katieshepherd/ssssswow</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-orthocenter-by-katieshepherd/ssssswow"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-triangle-s-orthocenter-by-katieshepherd/ssssswow"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-triangle-s-orthocenter-by-katieshepherd/ssssswow"/>
      <lastmod>2026-11-01T23:56:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangular-prism-cross-section/ssssswo6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-prism-cross-section/ssssswo6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-prism-cross-section/ssssswo6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-prism-cross-section/ssssswo6"/>
      <lastmod>2026-11-02T11:58:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangular-prism-cross-section/ssssswo6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangular-prism-cross-section/ssssswo6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangular-prism-cross-section/ssssswo6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangular-prism-cross-section/ssssswo6"/>
      <lastmod>2026-11-02T11:58:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/net-of-a-cone-by-tanq-zlateva/ssssswog</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-tanq-zlateva/ssssswog"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cone-by-tanq-zlateva/ssssswog"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-tanq-zlateva/ssssswog"/>
      <lastmod>2026-11-02T02:54:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/net-of-a-cone-by-tanq-zlateva/ssssswog</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-tanq-zlateva/ssssswog"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/net-of-a-cone-by-tanq-zlateva/ssssswog"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/net-of-a-cone-by-tanq-zlateva/ssssswog"/>
      <lastmod>2026-11-02T02:54:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-function-quiz/ssssswo9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-function-quiz/ssssswo9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-function-quiz/ssssswo9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-function-quiz/ssssswo9"/>
      <lastmod>2026-11-01T23:20:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-function-quiz/ssssswo9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-function-quiz/ssssswo9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-function-quiz/ssssswo9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-function-quiz/ssssswo9"/>
      <lastmod>2026-11-01T23:20:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/blast-off-geometric-transformations-and-piecewise-functions/ssssswoe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/blast-off-geometric-transformations-and-piecewise-functions/ssssswoe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/blast-off-geometric-transformations-and-piecewise-functions/ssssswoe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/blast-off-geometric-transformations-and-piecewise-functions/ssssswoe"/>
      <lastmod>2026-11-02T02:25:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/blast-off-geometric-transformations-and-piecewise-functions/ssssswoe</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/blast-off-geometric-transformations-and-piecewise-functions/ssssswoe"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/blast-off-geometric-transformations-and-piecewise-functions/ssssswoe"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/blast-off-geometric-transformations-and-piecewise-functions/ssssswoe"/>
      <lastmod>2026-11-02T02:25:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-to-torus-parametric-surface-and-rotation-sequence/ssssswov</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-to-torus-parametric-surface-and-rotation-sequence/ssssswov"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-to-torus-parametric-surface-and-rotation-sequence/ssssswov"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-to-torus-parametric-surface-and-rotation-sequence/ssssswov"/>
      <lastmod>2026-11-01T21:45:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-to-torus-parametric-surface-and-rotation-sequence/ssssswov</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-to-torus-parametric-surface-and-rotation-sequence/ssssswov"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-to-torus-parametric-surface-and-rotation-sequence/ssssswov"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-to-torus-parametric-surface-and-rotation-sequence/ssssswov"/>
      <lastmod>2026-11-01T21:45:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/basic-geometric-line-constructions/ssssswo4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-geometric-line-constructions/ssssswo4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-geometric-line-constructions/ssssswo4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-geometric-line-constructions/ssssswo4"/>
      <lastmod>2026-11-01T21:41:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/basic-geometric-line-constructions/ssssswo4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/basic-geometric-line-constructions/ssssswo4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/basic-geometric-line-constructions/ssssswo4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/basic-geometric-line-constructions/ssssswo4"/>
      <lastmod>2026-11-01T21:41:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/apollonius-parabola-2/ssssswol</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/apollonius-parabola-2/ssssswol"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/apollonius-parabola-2/ssssswol"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/apollonius-parabola-2/ssssswol"/>
      <lastmod>2026-11-01T23:36:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/apollonius-parabola-2/ssssswol</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/apollonius-parabola-2/ssssswol"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/apollonius-parabola-2/ssssswol"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/apollonius-parabola-2/ssssswol"/>
      <lastmod>2026-11-01T23:36:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/h-derivatives-demo/ssssswoy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/h-derivatives-demo/ssssswoy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/h-derivatives-demo/ssssswoy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/h-derivatives-demo/ssssswoy"/>
      <lastmod>2026-11-02T12:09:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/h-derivatives-demo/ssssswoy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/h-derivatives-demo/ssssswoy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/h-derivatives-demo/ssssswoy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/h-derivatives-demo/ssssswoy"/>
      <lastmod>2026-11-02T12:09:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-rule-demonstration/ssssswoa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-rule-demonstration/ssssswoa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-rule-demonstration/ssssswoa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-rule-demonstration/ssssswoa"/>
      <lastmod>2026-11-02T03:11:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-rule-demonstration/ssssswoa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-rule-demonstration/ssssswoa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-rule-demonstration/ssssswoa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-rule-demonstration/ssssswoa"/>
      <lastmod>2026-11-02T03:11:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/interactive-practice-random-triangle-orthocenter-and-logarithmic-translation/ssssswoc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-practice-random-triangle-orthocenter-and-logarithmic-translation/ssssswoc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-practice-random-triangle-orthocenter-and-logarithmic-translation/ssssswoc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-practice-random-triangle-orthocenter-and-logarithmic-translation/ssssswoc"/>
      <lastmod>2026-11-02T03:12:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/interactive-practice-random-triangle-orthocenter-and-logarithmic-translation/ssssswoc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/interactive-practice-random-triangle-orthocenter-and-logarithmic-translation/ssssswoc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/interactive-practice-random-triangle-orthocenter-and-logarithmic-translation/ssssswoc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/interactive-practice-random-triangle-orthocenter-and-logarithmic-translation/ssssswoc"/>
      <lastmod>2026-11-02T03:12:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-inscribed-polygons-and-rectangle-division-in-a-unit-ci/ssssswor</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-inscribed-polygons-and-rectangle-division-in-a-unit-ci/ssssswor"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-inscribed-polygons-and-rectangle-division-in-a-unit-ci/ssssswor"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-inscribed-polygons-and-rectangle-division-in-a-unit-ci/ssssswor"/>
      <lastmod>2026-11-01T19:21:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-inscribed-polygons-and-rectangle-division-in-a-unit-ci/ssssswor</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-inscribed-polygons-and-rectangle-division-in-a-unit-ci/ssssswor"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-inscribed-polygons-and-rectangle-division-in-a-unit-ci/ssssswor"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-inscribed-polygons-and-rectangle-division-in-a-unit-ci/ssssswor"/>
      <lastmod>2026-11-01T19:21:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ratios-and-fractions/ssssswoh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratios-and-fractions/ssssswoh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratios-and-fractions/ssssswoh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratios-and-fractions/ssssswoh"/>
      <lastmod>2026-11-02T10:38:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ratios-and-fractions/ssssswoh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ratios-and-fractions/ssssswoh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ratios-and-fractions/ssssswoh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ratios-and-fractions/ssssswoh"/>
      <lastmod>2026-11-02T10:38:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/section-of-a-cone/ssssswot</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/section-of-a-cone/ssssswot"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/section-of-a-cone/ssssswot"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/section-of-a-cone/ssssswot"/>
      <lastmod>2026-11-01T22:07:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/section-of-a-cone/ssssswot</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/section-of-a-cone/ssssswot"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/section-of-a-cone/ssssswot"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/section-of-a-cone/ssssswot"/>
      <lastmod>2026-11-01T22:07:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/comprehensive-example-similar-triangles-tree-diagrams-subtraction-planes-an/ssssswox</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comprehensive-example-similar-triangles-tree-diagrams-subtraction-planes-an/ssssswox"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comprehensive-example-similar-triangles-tree-diagrams-subtraction-planes-an/ssssswox"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comprehensive-example-similar-triangles-tree-diagrams-subtraction-planes-an/ssssswox"/>
      <lastmod>2026-11-01T22:11:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/comprehensive-example-similar-triangles-tree-diagrams-subtraction-planes-an/ssssswox</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/comprehensive-example-similar-triangles-tree-diagrams-subtraction-planes-an/ssssswox"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/comprehensive-example-similar-triangles-tree-diagrams-subtraction-planes-an/ssssswox"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/comprehensive-example-similar-triangles-tree-diagrams-subtraction-planes-an/ssssswox"/>
      <lastmod>2026-11-01T22:11:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/three-bounces-billiard-problem-geometric-construction-and-trajectory-analysis/ssssswoi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-bounces-billiard-problem-geometric-construction-and-trajectory-analysis/ssssswoi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-bounces-billiard-problem-geometric-construction-and-trajectory-analysis/ssssswoi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-bounces-billiard-problem-geometric-construction-and-trajectory-analysis/ssssswoi"/>
      <lastmod>2026-11-02T00:33:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/three-bounces-billiard-problem-geometric-construction-and-trajectory-analysis/ssssswoi</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/three-bounces-billiard-problem-geometric-construction-and-trajectory-analysis/ssssswoi"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/three-bounces-billiard-problem-geometric-construction-and-trajectory-analysis/ssssswoi"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/three-bounces-billiard-problem-geometric-construction-and-trajectory-analysis/ssssswoi"/>
      <lastmod>2026-11-02T00:33:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/animated-construction-of-the-midsegment/ssssswoo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-construction-of-the-midsegment/ssssswoo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-construction-of-the-midsegment/ssssswoo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-construction-of-the-midsegment/ssssswoo"/>
      <lastmod>2026-11-02T18:49:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/animated-construction-of-the-midsegment/ssssswoo</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/animated-construction-of-the-midsegment/ssssswoo"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/animated-construction-of-the-midsegment/ssssswoo"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/animated-construction-of-the-midsegment/ssssswoo"/>
      <lastmod>2026-11-02T18:49:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-focus-and-directrix-sssss2yg/sssss6ss</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-focus-and-directrix-sssss2yg/sssss6ss"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-focus-and-directrix-sssss2yg/sssss6ss"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-focus-and-directrix-sssss2yg/sssss6ss"/>
      <lastmod>2026-11-02T16:47:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-focus-and-directrix-sssss2yg/sssss6ss</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-focus-and-directrix-sssss2yg/sssss6ss"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-focus-and-directrix-sssss2yg/sssss6ss"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-focus-and-directrix-sssss2yg/sssss6ss"/>
      <lastmod>2026-11-02T16:47:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-root-part-6/sssss6s7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-part-6/sssss6s7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-part-6/sssss6s7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-part-6/sssss6s7"/>
      <lastmod>2026-11-02T02:56:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-root-part-6/sssss6s7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-part-6/sssss6s7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-part-6/sssss6s7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-part-6/sssss6s7"/>
      <lastmod>2026-11-02T02:56:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-wave-animation/sssss6sn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-wave-animation/sssss6sn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-wave-animation/sssss6sn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-wave-animation/sssss6sn"/>
      <lastmod>2026-11-02T03:01:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-wave-animation/sssss6sn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-wave-animation/sssss6sn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-wave-animation/sssss6sn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-wave-animation/sssss6sn"/>
      <lastmod>2026-11-02T03:01:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dynamic-proof-of-sas-triangle-congruence-theorem-by-luis-alberto-peralta-amaya/sssss6s2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-sas-triangle-congruence-theorem-by-luis-alberto-peralta-amaya/sssss6s2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-proof-of-sas-triangle-congruence-theorem-by-luis-alberto-peralta-amaya/sssss6s2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-sas-triangle-congruence-theorem-by-luis-alberto-peralta-amaya/sssss6s2"/>
      <lastmod>2026-11-02T17:05:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dynamic-proof-of-sas-triangle-congruence-theorem-by-luis-alberto-peralta-amaya/sssss6s2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-sas-triangle-congruence-theorem-by-luis-alberto-peralta-amaya/sssss6s2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dynamic-proof-of-sas-triangle-congruence-theorem-by-luis-alberto-peralta-amaya/sssss6s2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dynamic-proof-of-sas-triangle-congruence-theorem-by-luis-alberto-peralta-amaya/sssss6s2"/>
      <lastmod>2026-11-02T17:05:38+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/reflectional-symmetry-of-tetrahedron/sssss6sk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflectional-symmetry-of-tetrahedron/sssss6sk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflectional-symmetry-of-tetrahedron/sssss6sk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflectional-symmetry-of-tetrahedron/sssss6sk"/>
      <lastmod>2026-11-02T09:00:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/reflectional-symmetry-of-tetrahedron/sssss6sk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/reflectional-symmetry-of-tetrahedron/sssss6sk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/reflectional-symmetry-of-tetrahedron/sssss6sk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/reflectional-symmetry-of-tetrahedron/sssss6sk"/>
      <lastmod>2026-11-02T09:00:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-barycentric-coordinates/sssss6sz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-barycentric-coordinates/sssss6sz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-barycentric-coordinates/sssss6sz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-barycentric-coordinates/sssss6sz"/>
      <lastmod>2026-11-02T16:53:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-barycentric-coordinates/sssss6sz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-barycentric-coordinates/sssss6sz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-barycentric-coordinates/sssss6sz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-barycentric-coordinates/sssss6sz"/>
      <lastmod>2026-11-02T16:53:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-functions-slope-intercept-form-practice-geogebra-interactive/sssss6s0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions-slope-intercept-form-practice-geogebra-interactive/sssss6s0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions-slope-intercept-form-practice-geogebra-interactive/sssss6s0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions-slope-intercept-form-practice-geogebra-interactive/sssss6s0"/>
      <lastmod>2026-11-01T19:04:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-functions-slope-intercept-form-practice-geogebra-interactive/sssss6s0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions-slope-intercept-form-practice-geogebra-interactive/sssss6s0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions-slope-intercept-form-practice-geogebra-interactive/sssss6s0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions-slope-intercept-form-practice-geogebra-interactive/sssss6s0"/>
      <lastmod>2026-11-01T19:04:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-trigonometric-ratios/sssss6sd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-trigonometric-ratios/sssss6sd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-trigonometric-ratios/sssss6sd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-trigonometric-ratios/sssss6sd"/>
      <lastmod>2026-11-02T17:15:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-trigonometric-ratios/sssss6sd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-trigonometric-ratios/sssss6sd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-trigonometric-ratios/sssss6sd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-trigonometric-ratios/sssss6sd"/>
      <lastmod>2026-11-02T17:15:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilating-a-line-segment/sssss6sf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilating-a-line-segment/sssss6sf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilating-a-line-segment/sssss6sf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilating-a-line-segment/sssss6sf"/>
      <lastmod>2026-11-02T13:29:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilating-a-line-segment/sssss6sf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilating-a-line-segment/sssss6sf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilating-a-line-segment/sssss6sf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilating-a-line-segment/sssss6sf"/>
      <lastmod>2026-11-02T13:29:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-triangles-exploration-translation-and-vector-construction/sssss6s8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-exploration-translation-and-vector-construction/sssss6s8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-exploration-translation-and-vector-construction/sssss6s8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-exploration-translation-and-vector-construction/sssss6s8"/>
      <lastmod>2026-11-01T20:30:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-triangles-exploration-translation-and-vector-construction/sssss6s8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-triangles-exploration-translation-and-vector-construction/sssss6s8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-triangles-exploration-translation-and-vector-construction/sssss6s8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-triangles-exploration-translation-and-vector-construction/sssss6s8"/>
      <lastmod>2026-11-01T20:30:01+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/distance-between-two-points-on-a-number-line/sssss6su</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-between-two-points-on-a-number-line/sssss6su"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-between-two-points-on-a-number-line/sssss6su"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-between-two-points-on-a-number-line/sssss6su"/>
      <lastmod>2026-11-02T02:37:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/distance-between-two-points-on-a-number-line/sssss6su</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/distance-between-two-points-on-a-number-line/sssss6su"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/distance-between-two-points-on-a-number-line/sssss6su"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/distance-between-two-points-on-a-number-line/sssss6su"/>
      <lastmod>2026-11-02T02:37:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/improper-fractions-visualized-from-circles-and-sectors-to-number-line/sssss6s5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/improper-fractions-visualized-from-circles-and-sectors-to-number-line/sssss6s5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/improper-fractions-visualized-from-circles-and-sectors-to-number-line/sssss6s5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/improper-fractions-visualized-from-circles-and-sectors-to-number-line/sssss6s5"/>
      <lastmod>2026-11-02T00:23:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/improper-fractions-visualized-from-circles-and-sectors-to-number-line/sssss6s5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/improper-fractions-visualized-from-circles-and-sectors-to-number-line/sssss6s5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/improper-fractions-visualized-from-circles-and-sectors-to-number-line/sssss6s5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/improper-fractions-visualized-from-circles-and-sectors-to-number-line/sssss6s5"/>
      <lastmod>2026-11-02T00:23:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logistic-models-of-covid-19-in-vermont-over-time/sssss6sb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logistic-models-of-covid-19-in-vermont-over-time/sssss6sb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logistic-models-of-covid-19-in-vermont-over-time/sssss6sb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logistic-models-of-covid-19-in-vermont-over-time/sssss6sb"/>
      <lastmod>2026-11-01T19:12:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logistic-models-of-covid-19-in-vermont-over-time/sssss6sb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logistic-models-of-covid-19-in-vermont-over-time/sssss6sb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logistic-models-of-covid-19-in-vermont-over-time/sssss6sb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logistic-models-of-covid-19-in-vermont-over-time/sssss6sb"/>
      <lastmod>2026-11-01T19:12:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-regular-polygons/sssss6s3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-regular-polygons/sssss6s3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-regular-polygons/sssss6s3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-regular-polygons/sssss6s3"/>
      <lastmod>2026-11-02T13:42:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-regular-polygons/sssss6s3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-regular-polygons/sssss6s3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-regular-polygons/sssss6s3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-regular-polygons/sssss6s3"/>
      <lastmod>2026-11-02T13:42:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-surface-by-daryl-cox/sssss6sq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-surface-by-daryl-cox/sssss6sq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-surface-by-daryl-cox/sssss6sq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-surface-by-daryl-cox/sssss6sq"/>
      <lastmod>2026-11-02T13:00:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-surface-by-daryl-cox/sssss6sq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-surface-by-daryl-cox/sssss6sq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-surface-by-daryl-cox/sssss6sq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-surface-by-daryl-cox/sssss6sq"/>
      <lastmod>2026-11-02T13:00:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/similar-right-triangles-demo-by-philip-taylor/sssss6s1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-right-triangles-demo-by-philip-taylor/sssss6s1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-right-triangles-demo-by-philip-taylor/sssss6s1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-right-triangles-demo-by-philip-taylor/sssss6s1"/>
      <lastmod>2026-11-02T18:27:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/similar-right-triangles-demo-by-philip-taylor/sssss6s1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/similar-right-triangles-demo-by-philip-taylor/sssss6s1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/similar-right-triangles-demo-by-philip-taylor/sssss6s1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/similar-right-triangles-demo-by-philip-taylor/sssss6s1"/>
      <lastmod>2026-11-02T18:27:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vector-subtraction-demonstration-by-d-jayaseelan-2/sssss6sm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-subtraction-demonstration-by-d-jayaseelan-2/sssss6sm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-subtraction-demonstration-by-d-jayaseelan-2/sssss6sm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-subtraction-demonstration-by-d-jayaseelan-2/sssss6sm"/>
      <lastmod>2026-11-02T16:52:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vector-subtraction-demonstration-by-d-jayaseelan-2/sssss6sm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vector-subtraction-demonstration-by-d-jayaseelan-2/sssss6sm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vector-subtraction-demonstration-by-d-jayaseelan-2/sssss6sm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vector-subtraction-demonstration-by-d-jayaseelan-2/sssss6sm"/>
      <lastmod>2026-11-02T16:52:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/kite-space/sssss6sj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-space/sssss6sj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-space/sssss6sj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-space/sssss6sj"/>
      <lastmod>2026-11-01T23:54:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/kite-space/sssss6sj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/kite-space/sssss6sj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/kite-space/sssss6sj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/kite-space/sssss6sj"/>
      <lastmod>2026-11-01T23:54:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/helical-slide-with-square-cross-sections/sssss6sp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/helical-slide-with-square-cross-sections/sssss6sp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/helical-slide-with-square-cross-sections/sssss6sp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/helical-slide-with-square-cross-sections/sssss6sp"/>
      <lastmod>2026-11-01T19:35:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/helical-slide-with-square-cross-sections/sssss6sp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/helical-slide-with-square-cross-sections/sssss6sp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/helical-slide-with-square-cross-sections/sssss6sp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/helical-slide-with-square-cross-sections/sssss6sp"/>
      <lastmod>2026-11-01T19:35:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-inscribed-in-a-circle/sssss6sw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-inscribed-in-a-circle/sssss6sw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-inscribed-in-a-circle/sssss6sw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-inscribed-in-a-circle/sssss6sw"/>
      <lastmod>2026-11-01T21:20:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-inscribed-in-a-circle/sssss6sw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-inscribed-in-a-circle/sssss6sw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-inscribed-in-a-circle/sssss6sw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-inscribed-in-a-circle/sssss6sw"/>
      <lastmod>2026-11-01T21:20:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-functions-parameter-plane/sssss6s6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions-parameter-plane/sssss6s6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions-parameter-plane/sssss6s6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions-parameter-plane/sssss6s6"/>
      <lastmod>2026-11-02T02:38:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-functions-parameter-plane/sssss6s6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-functions-parameter-plane/sssss6s6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-functions-parameter-plane/sssss6s6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-functions-parameter-plane/sssss6s6"/>
      <lastmod>2026-11-02T02:38:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/inside-out-ellipse-demo/sssss6sg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inside-out-ellipse-demo/sssss6sg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inside-out-ellipse-demo/sssss6sg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inside-out-ellipse-demo/sssss6sg"/>
      <lastmod>2026-11-02T09:49:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/inside-out-ellipse-demo/sssss6sg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/inside-out-ellipse-demo/sssss6sg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/inside-out-ellipse-demo/sssss6sg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/inside-out-ellipse-demo/sssss6sg"/>
      <lastmod>2026-11-02T09:49:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-functions-on-unit-circle-1/sssss6s9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-functions-on-unit-circle-1/sssss6s9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-functions-on-unit-circle-1/sssss6s9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-functions-on-unit-circle-1/sssss6s9"/>
      <lastmod>2026-11-02T09:26:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-functions-on-unit-circle-1/sssss6s9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-functions-on-unit-circle-1/sssss6s9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-functions-on-unit-circle-1/sssss6s9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-functions-on-unit-circle-1/sssss6s9"/>
      <lastmod>2026-11-02T09:26:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-8-3-8-translating-to-y-mx-b/sssss6se</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-8-3-8-translating-to-y-mx-b/sssss6se"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-8-3-8-translating-to-y-mx-b/sssss6se"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-8-3-8-translating-to-y-mx-b/sssss6se"/>
      <lastmod>2026-11-01T20:24:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-8-3-8-translating-to-y-mx-b/sssss6se</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-8-3-8-translating-to-y-mx-b/sssss6se"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-8-3-8-translating-to-y-mx-b/sssss6se"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-8-3-8-translating-to-y-mx-b/sssss6se"/>
      <lastmod>2026-11-01T20:24:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-surface-area-dynamic-demonstration-edited/sssss6sv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-surface-area-dynamic-demonstration-edited/sssss6sv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-surface-area-dynamic-demonstration-edited/sssss6sv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-surface-area-dynamic-demonstration-edited/sssss6sv"/>
      <lastmod>2026-11-02T18:43:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-surface-area-dynamic-demonstration-edited/sssss6sv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-surface-area-dynamic-demonstration-edited/sssss6sv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-surface-area-dynamic-demonstration-edited/sssss6sv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-surface-area-dynamic-demonstration-edited/sssss6sv"/>
      <lastmod>2026-11-02T18:43:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-square-and-cube-root-functions/sssss6s4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-square-and-cube-root-functions/sssss6s4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-square-and-cube-root-functions/sssss6s4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-square-and-cube-root-functions/sssss6s4"/>
      <lastmod>2026-11-02T13:37:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-square-and-cube-root-functions/sssss6s4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-square-and-cube-root-functions/sssss6s4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-square-and-cube-root-functions/sssss6s4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-square-and-cube-root-functions/sssss6s4"/>
      <lastmod>2026-11-02T13:37:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lines-in-multiple-planes/sssss6sl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lines-in-multiple-planes/sssss6sl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lines-in-multiple-planes/sssss6sl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lines-in-multiple-planes/sssss6sl"/>
      <lastmod>2026-11-01T23:36:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lines-in-multiple-planes/sssss6sl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lines-in-multiple-planes/sssss6sl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lines-in-multiple-planes/sssss6sl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lines-in-multiple-planes/sssss6sl"/>
      <lastmod>2026-11-01T23:36:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sector-area-with-inscribed-and-circumscribed-squares/sssss6sy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sector-area-with-inscribed-and-circumscribed-squares/sssss6sy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sector-area-with-inscribed-and-circumscribed-squares/sssss6sy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sector-area-with-inscribed-and-circumscribed-squares/sssss6sy"/>
      <lastmod>2026-11-01T19:09:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sector-area-with-inscribed-and-circumscribed-squares/sssss6sy</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sector-area-with-inscribed-and-circumscribed-squares/sssss6sy"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sector-area-with-inscribed-and-circumscribed-squares/sssss6sy"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sector-area-with-inscribed-and-circumscribed-squares/sssss6sy"/>
      <lastmod>2026-11-01T19:09:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cross-section-solid-example-squares/sssss6sa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-section-solid-example-squares/sssss6sa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-section-solid-example-squares/sssss6sa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-section-solid-example-squares/sssss6sa"/>
      <lastmod>2026-11-02T17:38:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cross-section-solid-example-squares/sssss6sa</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cross-section-solid-example-squares/sssss6sa"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cross-section-solid-example-squares/sssss6sa"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cross-section-solid-example-squares/sssss6sa"/>
      <lastmod>2026-11-02T17:38:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/quadratic-vertex-form-investigation-dynamic-parameter-exploration/sssss6sc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-vertex-form-investigation-dynamic-parameter-exploration/sssss6sc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-vertex-form-investigation-dynamic-parameter-exploration/sssss6sc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-vertex-form-investigation-dynamic-parameter-exploration/sssss6sc"/>
      <lastmod>2026-11-02T02:19:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/quadratic-vertex-form-investigation-dynamic-parameter-exploration/sssss6sc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/quadratic-vertex-form-investigation-dynamic-parameter-exploration/sssss6sc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/quadratic-vertex-form-investigation-dynamic-parameter-exploration/sssss6sc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/quadratic-vertex-form-investigation-dynamic-parameter-exploration/sssss6sc"/>
      <lastmod>2026-11-02T02:19:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/angle-bisectors-of-a-triangle/sssss6sr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-bisectors-of-a-triangle/sssss6sr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-bisectors-of-a-triangle/sssss6sr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-bisectors-of-a-triangle/sssss6sr"/>
      <lastmod>2026-11-01T23:10:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/angle-bisectors-of-a-triangle/sssss6sr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/angle-bisectors-of-a-triangle/sssss6sr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/angle-bisectors-of-a-triangle/sssss6sr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/angle-bisectors-of-a-triangle/sssss6sr"/>
      <lastmod>2026-11-01T23:10:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sine-and-cosine-addition-formula-demo/sssss6sh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-and-cosine-addition-formula-demo/sssss6sh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-and-cosine-addition-formula-demo/sssss6sh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-and-cosine-addition-formula-demo/sssss6sh"/>
      <lastmod>2026-11-02T16:46:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sine-and-cosine-addition-formula-demo/sssss6sh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sine-and-cosine-addition-formula-demo/sssss6sh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sine-and-cosine-addition-formula-demo/sssss6sh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sine-and-cosine-addition-formula-demo/sssss6sh"/>
      <lastmod>2026-11-02T16:46:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/penrose-kites-and-darts/sssss6st</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/penrose-kites-and-darts/sssss6st"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/penrose-kites-and-darts/sssss6st"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/penrose-kites-and-darts/sssss6st"/>
      <lastmod>2026-11-01T20:42:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/penrose-kites-and-darts/sssss6st</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/penrose-kites-and-darts/sssss6st"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/penrose-kites-and-darts/sssss6st"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/penrose-kites-and-darts/sssss6st"/>
      <lastmod>2026-11-01T20:42:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-reflection/sssss6sx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-reflection/sssss6sx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-reflection/sssss6sx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-reflection/sssss6sx"/>
      <lastmod>2026-11-02T18:47:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-reflection/sssss6sx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-reflection/sssss6sx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-reflection/sssss6sx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-reflection/sssss6sx"/>
      <lastmod>2026-11-02T18:47:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rotations-activity-intervention-exploring-triangle-rotation-and-similarity/sssss6si</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotations-activity-intervention-exploring-triangle-rotation-and-similarity/sssss6si"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotations-activity-intervention-exploring-triangle-rotation-and-similarity/sssss6si"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotations-activity-intervention-exploring-triangle-rotation-and-similarity/sssss6si"/>
      <lastmod>2026-11-02T16:50:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rotations-activity-intervention-exploring-triangle-rotation-and-similarity/sssss6si</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rotations-activity-intervention-exploring-triangle-rotation-and-similarity/sssss6si"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rotations-activity-intervention-exploring-triangle-rotation-and-similarity/sssss6si"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rotations-activity-intervention-exploring-triangle-rotation-and-similarity/sssss6si"/>
      <lastmod>2026-11-02T16:50:10+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/triangle-congruence-angle-side-angle-asa-exploration/sssss6so</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-congruence-angle-side-angle-asa-exploration/sssss6so"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-congruence-angle-side-angle-asa-exploration/sssss6so"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-congruence-angle-side-angle-asa-exploration/sssss6so"/>
      <lastmod>2026-11-02T00:20:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/triangle-congruence-angle-side-angle-asa-exploration/sssss6so</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/triangle-congruence-angle-side-angle-asa-exploration/sssss6so"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/triangle-congruence-angle-side-angle-asa-exploration/sssss6so"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/triangle-congruence-angle-side-angle-asa-exploration/sssss6so"/>
      <lastmod>2026-11-02T00:20:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/corresponding-parts-and-scale-factors/sssss67s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/corresponding-parts-and-scale-factors/sssss67s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/corresponding-parts-and-scale-factors/sssss67s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/corresponding-parts-and-scale-factors/sssss67s"/>
      <lastmod>2026-11-01T20:33:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/corresponding-parts-and-scale-factors/sssss67s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/corresponding-parts-and-scale-factors/sssss67s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/corresponding-parts-and-scale-factors/sssss67s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/corresponding-parts-and-scale-factors/sssss67s"/>
      <lastmod>2026-11-01T20:33:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-function-on-horizontal-axis/sssss677</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-function-on-horizontal-axis/sssss677"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-function-on-horizontal-axis/sssss677"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-function-on-horizontal-axis/sssss677"/>
      <lastmod>2026-11-02T18:23:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-function-on-horizontal-axis/sssss677</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-function-on-horizontal-axis/sssss677"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-function-on-horizontal-axis/sssss677"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-function-on-horizontal-axis/sssss677"/>
      <lastmod>2026-11-02T18:23:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ordering-rational-numbers-by-praveen-kumar/sssss67n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ordering-rational-numbers-by-praveen-kumar/sssss67n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ordering-rational-numbers-by-praveen-kumar/sssss67n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ordering-rational-numbers-by-praveen-kumar/sssss67n"/>
      <lastmod>2026-11-02T17:40:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ordering-rational-numbers-by-praveen-kumar/sssss67n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ordering-rational-numbers-by-praveen-kumar/sssss67n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ordering-rational-numbers-by-praveen-kumar/sssss67n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ordering-rational-numbers-by-praveen-kumar/sssss67n"/>
      <lastmod>2026-11-02T17:40:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sir-model-simulation-for-simplified-covid-19-dynamics/sssss672</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sir-model-simulation-for-simplified-covid-19-dynamics/sssss672"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sir-model-simulation-for-simplified-covid-19-dynamics/sssss672"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sir-model-simulation-for-simplified-covid-19-dynamics/sssss672"/>
      <lastmod>2026-11-01T20:55:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sir-model-simulation-for-simplified-covid-19-dynamics/sssss672</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sir-model-simulation-for-simplified-covid-19-dynamics/sssss672"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sir-model-simulation-for-simplified-covid-19-dynamics/sssss672"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sir-model-simulation-for-simplified-covid-19-dynamics/sssss672"/>
      <lastmod>2026-11-01T20:55:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/golden-and-root-rectangles-demo/sssss67k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/golden-and-root-rectangles-demo/sssss67k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/golden-and-root-rectangles-demo/sssss67k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/golden-and-root-rectangles-demo/sssss67k"/>
      <lastmod>2026-11-01T22:05:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/golden-and-root-rectangles-demo/sssss67k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/golden-and-root-rectangles-demo/sssss67k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/golden-and-root-rectangles-demo/sssss67k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/golden-and-root-rectangles-demo/sssss67k"/>
      <lastmod>2026-11-01T22:05:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/parabola-drawing-and-demonstration/sssss67z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-drawing-and-demonstration/sssss67z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-drawing-and-demonstration/sssss67z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-drawing-and-demonstration/sssss67z"/>
      <lastmod>2026-11-02T11:51:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/parabola-drawing-and-demonstration/sssss67z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/parabola-drawing-and-demonstration/sssss67z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/parabola-drawing-and-demonstration/sssss67z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/parabola-drawing-and-demonstration/sssss67z"/>
      <lastmod>2026-11-02T11:51:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geoboard-and-automatic-feedback-with-geogebra/sssss670</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geoboard-and-automatic-feedback-with-geogebra/sssss670"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geoboard-and-automatic-feedback-with-geogebra/sssss670"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geoboard-and-automatic-feedback-with-geogebra/sssss670"/>
      <lastmod>2026-11-01T23:18:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geoboard-and-automatic-feedback-with-geogebra/sssss670</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geoboard-and-automatic-feedback-with-geogebra/sssss670"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geoboard-and-automatic-feedback-with-geogebra/sssss670"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geoboard-and-automatic-feedback-with-geogebra/sssss670"/>
      <lastmod>2026-11-01T23:18:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/feng-shui-spiral-example/sssss67d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/feng-shui-spiral-example/sssss67d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/feng-shui-spiral-example/sssss67d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/feng-shui-spiral-example/sssss67d"/>
      <lastmod>2026-11-02T16:38:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/feng-shui-spiral-example/sssss67d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/feng-shui-spiral-example/sssss67d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/feng-shui-spiral-example/sssss67d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/feng-shui-spiral-example/sssss67d"/>
      <lastmod>2026-11-02T16:38:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tilt-the-duct/sssss67f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tilt-the-duct/sssss67f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tilt-the-duct/sssss67f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tilt-the-duct/sssss67f"/>
      <lastmod>2026-11-02T16:45:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tilt-the-duct/sssss67f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tilt-the-duct/sssss67f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tilt-the-duct/sssss67f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tilt-the-duct/sssss67f"/>
      <lastmod>2026-11-02T16:45:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-numbers-algebraic-and-trigonometric-form-with-geometric-representation/sssss678</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-numbers-algebraic-and-trigonometric-form-with-geometric-representation/sssss678"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-numbers-algebraic-and-trigonometric-form-with-geometric-representation/sssss678"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-numbers-algebraic-and-trigonometric-form-with-geometric-representation/sssss678"/>
      <lastmod>2026-11-02T02:57:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-numbers-algebraic-and-trigonometric-form-with-geometric-representation/sssss678</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-numbers-algebraic-and-trigonometric-form-with-geometric-representation/sssss678"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-numbers-algebraic-and-trigonometric-form-with-geometric-representation/sssss678"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-numbers-algebraic-and-trigonometric-form-with-geometric-representation/sssss678"/>
      <lastmod>2026-11-02T02:57:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/location-of-irrational-numbers-on-number-line/sssss67u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/location-of-irrational-numbers-on-number-line/sssss67u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/location-of-irrational-numbers-on-number-line/sssss67u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/location-of-irrational-numbers-on-number-line/sssss67u"/>
      <lastmod>2026-11-02T18:32:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/location-of-irrational-numbers-on-number-line/sssss67u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/location-of-irrational-numbers-on-number-line/sssss67u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/location-of-irrational-numbers-on-number-line/sssss67u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/location-of-irrational-numbers-on-number-line/sssss67u"/>
      <lastmod>2026-11-02T18:32:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-8-4-12-practice-systems-of-equations/sssss675</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-8-4-12-practice-systems-of-equations/sssss675"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-8-4-12-practice-systems-of-equations/sssss675"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-8-4-12-practice-systems-of-equations/sssss675"/>
      <lastmod>2026-11-01T22:56:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-8-4-12-practice-systems-of-equations/sssss675</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-8-4-12-practice-systems-of-equations/sssss675"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-8-4-12-practice-systems-of-equations/sssss675"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-8-4-12-practice-systems-of-equations/sssss675"/>
      <lastmod>2026-11-01T22:56:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/shearer-dynamic-geometry-demo/sssss67b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shearer-dynamic-geometry-demo/sssss67b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shearer-dynamic-geometry-demo/sssss67b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shearer-dynamic-geometry-demo/sssss67b"/>
      <lastmod>2026-11-01T19:37:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/shearer-dynamic-geometry-demo/sssss67b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/shearer-dynamic-geometry-demo/sssss67b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/shearer-dynamic-geometry-demo/sssss67b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/shearer-dynamic-geometry-demo/sssss67b"/>
      <lastmod>2026-11-01T19:37:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tessellation-of-kites-and-degenerate-hexagons/sssss673</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tessellation-of-kites-and-degenerate-hexagons/sssss673"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tessellation-of-kites-and-degenerate-hexagons/sssss673"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tessellation-of-kites-and-degenerate-hexagons/sssss673"/>
      <lastmod>2026-11-01T21:27:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tessellation-of-kites-and-degenerate-hexagons/sssss673</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tessellation-of-kites-and-degenerate-hexagons/sssss673"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tessellation-of-kites-and-degenerate-hexagons/sssss673"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tessellation-of-kites-and-degenerate-hexagons/sssss673"/>
      <lastmod>2026-11-01T21:27:34+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/practicing-representing-fractions-on-number-line/sssss67q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practicing-representing-fractions-on-number-line/sssss67q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practicing-representing-fractions-on-number-line/sssss67q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practicing-representing-fractions-on-number-line/sssss67q"/>
      <lastmod>2026-11-02T09:56:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/practicing-representing-fractions-on-number-line/sssss67q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/practicing-representing-fractions-on-number-line/sssss67q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/practicing-representing-fractions-on-number-line/sssss67q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/practicing-representing-fractions-on-number-line/sssss67q"/>
      <lastmod>2026-11-02T09:56:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/translation/sssss671</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation/sssss671"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation/sssss671"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation/sssss671"/>
      <lastmod>2026-11-01T21:34:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/translation/sssss671</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/translation/sssss671"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/translation/sssss671"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/translation/sssss671"/>
      <lastmod>2026-11-01T21:34:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/prism-and-pyramid-practice/sssss67m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-and-pyramid-practice/sssss67m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-and-pyramid-practice/sssss67m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-and-pyramid-practice/sssss67m"/>
      <lastmod>2026-11-01T21:31:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/prism-and-pyramid-practice/sssss67m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/prism-and-pyramid-practice/sssss67m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/prism-and-pyramid-practice/sssss67m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/prism-and-pyramid-practice/sssss67m"/>
      <lastmod>2026-11-01T21:31:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vectors-question-3/sssss67j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-question-3/sssss67j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-question-3/sssss67j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-question-3/sssss67j"/>
      <lastmod>2026-11-02T16:42:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vectors-question-3/sssss67j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vectors-question-3/sssss67j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vectors-question-3/sssss67j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vectors-question-3/sssss67j"/>
      <lastmod>2026-11-02T16:42:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-addition-demo-by-panpan1663/sssss67p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-demo-by-panpan1663/sssss67p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-demo-by-panpan1663/sssss67p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-demo-by-panpan1663/sssss67p"/>
      <lastmod>2026-11-02T13:14:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-addition-demo-by-panpan1663/sssss67p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-addition-demo-by-panpan1663/sssss67p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-addition-demo-by-panpan1663/sssss67p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-addition-demo-by-panpan1663/sssss67p"/>
      <lastmod>2026-11-02T13:14:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualization-of-derivative/sssss67w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualization-of-derivative/sssss67w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualization-of-derivative/sssss67w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualization-of-derivative/sssss67w"/>
      <lastmod>2026-11-02T12:33:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualization-of-derivative/sssss67w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualization-of-derivative/sssss67w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualization-of-derivative/sssss67w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualization-of-derivative/sssss67w"/>
      <lastmod>2026-11-02T12:33:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/algebra-balance-scales-interactive-equation-solving/sssss676</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebra-balance-scales-interactive-equation-solving/sssss676"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebra-balance-scales-interactive-equation-solving/sssss676"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebra-balance-scales-interactive-equation-solving/sssss676"/>
      <lastmod>2026-11-01T21:49:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/algebra-balance-scales-interactive-equation-solving/sssss676</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/algebra-balance-scales-interactive-equation-solving/sssss676"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/algebra-balance-scales-interactive-equation-solving/sssss676"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/algebra-balance-scales-interactive-equation-solving/sssss676"/>
      <lastmod>2026-11-01T21:49:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-linear-inequalities-in-2-variables/sssss67g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-inequalities-in-2-variables/sssss67g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-inequalities-in-2-variables/sssss67g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-inequalities-in-2-variables/sssss67g"/>
      <lastmod>2026-11-01T19:29:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-linear-inequalities-in-2-variables/sssss67g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-linear-inequalities-in-2-variables/sssss67g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-linear-inequalities-in-2-variables/sssss67g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-linear-inequalities-in-2-variables/sssss67g"/>
      <lastmod>2026-11-01T19:29:37+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/earth-is-round/sssss679</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/earth-is-round/sssss679"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/earth-is-round/sssss679"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/earth-is-round/sssss679"/>
      <lastmod>2026-11-01T21:20:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/earth-is-round/sssss679</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/earth-is-round/sssss679"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/earth-is-round/sssss679"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/earth-is-round/sssss679"/>
      <lastmod>2026-11-01T21:20:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-squares-demo/sssss67e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-squares-demo/sssss67e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-squares-demo/sssss67e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-squares-demo/sssss67e"/>
      <lastmod>2026-11-02T17:56:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-squares-demo/sssss67e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-squares-demo/sssss67e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-squares-demo/sssss67e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-squares-demo/sssss67e"/>
      <lastmod>2026-11-02T17:56:45+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-non-random-sampling-methods/sssss67v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-non-random-sampling-methods/sssss67v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-non-random-sampling-methods/sssss67v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-non-random-sampling-methods/sssss67v"/>
      <lastmod>2026-11-01T19:04:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-non-random-sampling-methods/sssss67v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-non-random-sampling-methods/sssss67v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-non-random-sampling-methods/sssss67v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-non-random-sampling-methods/sssss67v"/>
      <lastmod>2026-11-01T19:04:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-programming-example-1/sssss674</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-programming-example-1/sssss674"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-programming-example-1/sssss674"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-programming-example-1/sssss674"/>
      <lastmod>2026-11-01T20:58:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-programming-example-1/sssss674</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-programming-example-1/sssss674"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-programming-example-1/sssss674"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-programming-example-1/sssss674"/>
      <lastmod>2026-11-01T20:58:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/perpendicular-bisectors-construction-task/sssss67l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisectors-construction-task/sssss67l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisectors-construction-task/sssss67l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisectors-construction-task/sssss67l"/>
      <lastmod>2026-11-02T15:50:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/perpendicular-bisectors-construction-task/sssss67l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/perpendicular-bisectors-construction-task/sssss67l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/perpendicular-bisectors-construction-task/sssss67l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/perpendicular-bisectors-construction-task/sssss67l"/>
      <lastmod>2026-11-02T15:50:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hello-kitty-sine-graph-public/sssss67y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hello-kitty-sine-graph-public/sssss67y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hello-kitty-sine-graph-public/sssss67y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hello-kitty-sine-graph-public/sssss67y"/>
      <lastmod>2026-11-02T02:52:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hello-kitty-sine-graph-public/sssss67y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hello-kitty-sine-graph-public/sssss67y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hello-kitty-sine-graph-public/sssss67y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hello-kitty-sine-graph-public/sssss67y"/>
      <lastmod>2026-11-02T02:52:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dancing-solution-curves-of-odes-by-juan-carlos-ponce-campuzano/sssss67a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dancing-solution-curves-of-odes-by-juan-carlos-ponce-campuzano/sssss67a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dancing-solution-curves-of-odes-by-juan-carlos-ponce-campuzano/sssss67a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dancing-solution-curves-of-odes-by-juan-carlos-ponce-campuzano/sssss67a"/>
      <lastmod>2026-11-02T16:30:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dancing-solution-curves-of-odes-by-juan-carlos-ponce-campuzano/sssss67a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dancing-solution-curves-of-odes-by-juan-carlos-ponce-campuzano/sssss67a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dancing-solution-curves-of-odes-by-juan-carlos-ponce-campuzano/sssss67a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dancing-solution-curves-of-odes-by-juan-carlos-ponce-campuzano/sssss67a"/>
      <lastmod>2026-11-02T16:30:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometry-sohcahtoa-dynamic-right-triangle-ratios/sssss67c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometry-sohcahtoa-dynamic-right-triangle-ratios/sssss67c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometry-sohcahtoa-dynamic-right-triangle-ratios/sssss67c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometry-sohcahtoa-dynamic-right-triangle-ratios/sssss67c"/>
      <lastmod>2026-11-01T19:14:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometry-sohcahtoa-dynamic-right-triangle-ratios/sssss67c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometry-sohcahtoa-dynamic-right-triangle-ratios/sssss67c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometry-sohcahtoa-dynamic-right-triangle-ratios/sssss67c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometry-sohcahtoa-dynamic-right-triangle-ratios/sssss67c"/>
      <lastmod>2026-11-01T19:14:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/p3-making-triangles-2-square-grid-able-to-check-answer/sssss67r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p3-making-triangles-2-square-grid-able-to-check-answer/sssss67r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p3-making-triangles-2-square-grid-able-to-check-answer/sssss67r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p3-making-triangles-2-square-grid-able-to-check-answer/sssss67r"/>
      <lastmod>2026-11-01T19:05:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/p3-making-triangles-2-square-grid-able-to-check-answer/sssss67r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/p3-making-triangles-2-square-grid-able-to-check-answer/sssss67r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/p3-making-triangles-2-square-grid-able-to-check-answer/sssss67r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/p3-making-triangles-2-square-grid-able-to-check-answer/sssss67r"/>
      <lastmod>2026-11-01T19:05:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sphere-and-art/sssss67h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-and-art/sssss67h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-and-art/sssss67h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-and-art/sssss67h"/>
      <lastmod>2026-11-02T00:06:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sphere-and-art/sssss67h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sphere-and-art/sssss67h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sphere-and-art/sssss67h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sphere-and-art/sssss67h"/>
      <lastmod>2026-11-02T00:06:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solving-linear-equations-with-general-strategy/sssss67t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-equations-with-general-strategy/sssss67t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-equations-with-general-strategy/sssss67t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-equations-with-general-strategy/sssss67t"/>
      <lastmod>2026-11-01T21:02:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solving-linear-equations-with-general-strategy/sssss67t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solving-linear-equations-with-general-strategy/sssss67t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solving-linear-equations-with-general-strategy/sssss67t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solving-linear-equations-with-general-strategy/sssss67t"/>
      <lastmod>2026-11-01T21:02:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-circumcenter-and-the-nine-point-circle-figure-7-2/sssss67x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-circumcenter-and-the-nine-point-circle-figure-7-2/sssss67x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-circumcenter-and-the-nine-point-circle-figure-7-2/sssss67x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-circumcenter-and-the-nine-point-circle-figure-7-2/sssss67x"/>
      <lastmod>2026-11-02T00:47:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-circumcenter-and-the-nine-point-circle-figure-7-2/sssss67x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-circumcenter-and-the-nine-point-circle-figure-7-2/sssss67x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-circumcenter-and-the-nine-point-circle-figure-7-2/sssss67x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-circumcenter-and-the-nine-point-circle-figure-7-2/sssss67x"/>
      <lastmod>2026-11-02T00:47:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/islamic-geometric-pattern-darb-i-imam-dome/sssss67i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-geometric-pattern-darb-i-imam-dome/sssss67i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-geometric-pattern-darb-i-imam-dome/sssss67i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-geometric-pattern-darb-i-imam-dome/sssss67i"/>
      <lastmod>2026-11-01T21:00:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/islamic-geometric-pattern-darb-i-imam-dome/sssss67i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/islamic-geometric-pattern-darb-i-imam-dome/sssss67i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/islamic-geometric-pattern-darb-i-imam-dome/sssss67i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/islamic-geometric-pattern-darb-i-imam-dome/sssss67i"/>
      <lastmod>2026-11-01T21:00:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/law-of-sines-case-ssa/sssss67o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-sines-case-ssa/sssss67o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-sines-case-ssa/sssss67o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-sines-case-ssa/sssss67o"/>
      <lastmod>2026-11-02T02:39:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/law-of-sines-case-ssa/sssss67o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-sines-case-ssa/sssss67o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-sines-case-ssa/sssss67o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-sines-case-ssa/sssss67o"/>
      <lastmod>2026-11-02T02:39:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conic-section-of-a-cone/sssss6ns</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-section-of-a-cone/sssss6ns"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-section-of-a-cone/sssss6ns"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-section-of-a-cone/sssss6ns"/>
      <lastmod>2026-11-02T12:32:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conic-section-of-a-cone/sssss6ns</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-section-of-a-cone/sssss6ns"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-section-of-a-cone/sssss6ns"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-section-of-a-cone/sssss6ns"/>
      <lastmod>2026-11-02T12:32:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/fraction-strip-addition-demo/sssss6n7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-strip-addition-demo/sssss6n7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-strip-addition-demo/sssss6n7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-strip-addition-demo/sssss6n7"/>
      <lastmod>2026-11-02T18:04:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/fraction-strip-addition-demo/sssss6n7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/fraction-strip-addition-demo/sssss6n7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/fraction-strip-addition-demo/sssss6n7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/fraction-strip-addition-demo/sssss6n7"/>
      <lastmod>2026-11-02T18:04:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/vertical-translation-shifting-function-graphs-up-and-down/sssss6nn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-translation-shifting-function-graphs-up-and-down/sssss6nn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-translation-shifting-function-graphs-up-and-down/sssss6nn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-translation-shifting-function-graphs-up-and-down/sssss6nn"/>
      <lastmod>2026-11-01T21:05:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/vertical-translation-shifting-function-graphs-up-and-down/sssss6nn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/vertical-translation-shifting-function-graphs-up-and-down/sssss6nn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/vertical-translation-shifting-function-graphs-up-and-down/sssss6nn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/vertical-translation-shifting-function-graphs-up-and-down/sssss6nn"/>
      <lastmod>2026-11-01T21:05:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/data-table-probability-general/sssss6n2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/data-table-probability-general/sssss6n2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/data-table-probability-general/sssss6n2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/data-table-probability-general/sssss6n2"/>
      <lastmod>2026-11-01T23:59:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/data-table-probability-general/sssss6n2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/data-table-probability-general/sssss6n2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/data-table-probability-general/sssss6n2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/data-table-probability-general/sssss6n2"/>
      <lastmod>2026-11-01T23:59:29+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cosine-rule-question-generator-for-side-length/sssss6nk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-rule-question-generator-for-side-length/sssss6nk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-rule-question-generator-for-side-length/sssss6nk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-rule-question-generator-for-side-length/sssss6nk"/>
      <lastmod>2026-11-02T17:47:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cosine-rule-question-generator-for-side-length/sssss6nk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cosine-rule-question-generator-for-side-length/sssss6nk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cosine-rule-question-generator-for-side-length/sssss6nk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cosine-rule-question-generator-for-side-length/sssss6nk"/>
      <lastmod>2026-11-02T17:47:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/binomial-to-normal-distribution-with-gamma-coefficient-version-2/sssss6nz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-to-normal-distribution-with-gamma-coefficient-version-2/sssss6nz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-to-normal-distribution-with-gamma-coefficient-version-2/sssss6nz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-to-normal-distribution-with-gamma-coefficient-version-2/sssss6nz"/>
      <lastmod>2026-11-02T00:50:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/binomial-to-normal-distribution-with-gamma-coefficient-version-2/sssss6nz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/binomial-to-normal-distribution-with-gamma-coefficient-version-2/sssss6nz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/binomial-to-normal-distribution-with-gamma-coefficient-version-2/sssss6nz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/binomial-to-normal-distribution-with-gamma-coefficient-version-2/sssss6nz"/>
      <lastmod>2026-11-02T00:50:39+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/signs-of-numbers-in-coordinates/sssss6n0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/signs-of-numbers-in-coordinates/sssss6n0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/signs-of-numbers-in-coordinates/sssss6n0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/signs-of-numbers-in-coordinates/sssss6n0"/>
      <lastmod>2026-11-02T16:37:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/signs-of-numbers-in-coordinates/sssss6n0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/signs-of-numbers-in-coordinates/sssss6n0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/signs-of-numbers-in-coordinates/sssss6n0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/signs-of-numbers-in-coordinates/sssss6n0"/>
      <lastmod>2026-11-02T16:37:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-symmetry-of-zeros-in-quadratics/sssss6nd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-symmetry-of-zeros-in-quadratics/sssss6nd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-symmetry-of-zeros-in-quadratics/sssss6nd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-symmetry-of-zeros-in-quadratics/sssss6nd"/>
      <lastmod>2026-11-02T18:25:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-symmetry-of-zeros-in-quadratics/sssss6nd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-symmetry-of-zeros-in-quadratics/sssss6nd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-symmetry-of-zeros-in-quadratics/sssss6nd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-symmetry-of-zeros-in-quadratics/sssss6nd"/>
      <lastmod>2026-11-02T18:25:26+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/trigonometric-functions-sine-cosine-and-tangent-via-the-unit-circle/sssss6nf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-functions-sine-cosine-and-tangent-via-the-unit-circle/sssss6nf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-functions-sine-cosine-and-tangent-via-the-unit-circle/sssss6nf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-functions-sine-cosine-and-tangent-via-the-unit-circle/sssss6nf"/>
      <lastmod>2026-11-01T21:11:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/trigonometric-functions-sine-cosine-and-tangent-via-the-unit-circle/sssss6nf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/trigonometric-functions-sine-cosine-and-tangent-via-the-unit-circle/sssss6nf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/trigonometric-functions-sine-cosine-and-tangent-via-the-unit-circle/sssss6nf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/trigonometric-functions-sine-cosine-and-tangent-via-the-unit-circle/sssss6nf"/>
      <lastmod>2026-11-01T21:11:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/conic-sections-by-katie/sssss6n8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-sections-by-katie/sssss6n8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-sections-by-katie/sssss6n8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-by-katie/sssss6n8"/>
      <lastmod>2026-11-02T18:16:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/conic-sections-by-katie/sssss6n8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/conic-sections-by-katie/sssss6n8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/conic-sections-by-katie/sssss6n8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/conic-sections-by-katie/sssss6n8"/>
      <lastmod>2026-11-02T18:16:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hyperbola-construction-sssssqa3/sssss6nu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-construction-sssssqa3/sssss6nu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-construction-sssssqa3/sssss6nu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-construction-sssssqa3/sssss6nu"/>
      <lastmod>2026-11-01T23:30:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hyperbola-construction-sssssqa3/sssss6nu</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hyperbola-construction-sssssqa3/sssss6nu"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hyperbola-construction-sssssqa3/sssss6nu"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hyperbola-construction-sssssqa3/sssss6nu"/>
      <lastmod>2026-11-01T23:30:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-polygons-and-incircles/sssss6n5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-polygons-and-incircles/sssss6n5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-polygons-and-incircles/sssss6n5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-polygons-and-incircles/sssss6n5"/>
      <lastmod>2026-11-02T00:35:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-polygons-and-incircles/sssss6n5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-polygons-and-incircles/sssss6n5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-polygons-and-incircles/sssss6n5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-polygons-and-incircles/sssss6n5"/>
      <lastmod>2026-11-02T00:35:36+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/linear-inequalities-system-region-selection-practice/sssss6nb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-inequalities-system-region-selection-practice/sssss6nb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-inequalities-system-region-selection-practice/sssss6nb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-inequalities-system-region-selection-practice/sssss6nb"/>
      <lastmod>2026-11-01T19:29:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/linear-inequalities-system-region-selection-practice/sssss6nb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/linear-inequalities-system-region-selection-practice/sssss6nb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/linear-inequalities-system-region-selection-practice/sssss6nb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/linear-inequalities-system-region-selection-practice/sssss6nb"/>
      <lastmod>2026-11-01T19:29:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/describing-transformations-with-geogebra/sssss6n3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/describing-transformations-with-geogebra/sssss6n3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/describing-transformations-with-geogebra/sssss6n3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/describing-transformations-with-geogebra/sssss6n3"/>
      <lastmod>2026-11-01T23:04:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/describing-transformations-with-geogebra/sssss6n3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/describing-transformations-with-geogebra/sssss6n3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/describing-transformations-with-geogebra/sssss6n3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/describing-transformations-with-geogebra/sssss6n3"/>
      <lastmod>2026-11-01T23:04:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/spiral-method-for-showing-irrational-numbers/sssss6nq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-method-for-showing-irrational-numbers/sssss6nq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-method-for-showing-irrational-numbers/sssss6nq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-method-for-showing-irrational-numbers/sssss6nq"/>
      <lastmod>2026-11-01T20:50:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/spiral-method-for-showing-irrational-numbers/sssss6nq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/spiral-method-for-showing-irrational-numbers/sssss6nq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/spiral-method-for-showing-irrational-numbers/sssss6nq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/spiral-method-for-showing-irrational-numbers/sssss6nq"/>
      <lastmod>2026-11-01T20:50:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-root-function-graph-with-related-geometric-objects/sssss6n1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-function-graph-with-related-geometric-objects/sssss6n1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-function-graph-with-related-geometric-objects/sssss6n1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-function-graph-with-related-geometric-objects/sssss6n1"/>
      <lastmod>2026-11-02T18:08:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-root-function-graph-with-related-geometric-objects/sssss6n1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-root-function-graph-with-related-geometric-objects/sssss6n1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-root-function-graph-with-related-geometric-objects/sssss6n1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-root-function-graph-with-related-geometric-objects/sssss6n1"/>
      <lastmod>2026-11-02T18:08:48+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/function-diagrams-on-parallel-axes/sssss6nm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-diagrams-on-parallel-axes/sssss6nm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-diagrams-on-parallel-axes/sssss6nm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-diagrams-on-parallel-axes/sssss6nm"/>
      <lastmod>2026-11-01T21:29:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/function-diagrams-on-parallel-axes/sssss6nm</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/function-diagrams-on-parallel-axes/sssss6nm"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/function-diagrams-on-parallel-axes/sssss6nm"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/function-diagrams-on-parallel-axes/sssss6nm"/>
      <lastmod>2026-11-01T21:29:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/mean-confidence-interval-demo/sssss6nj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mean-confidence-interval-demo/sssss6nj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mean-confidence-interval-demo/sssss6nj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mean-confidence-interval-demo/sssss6nj"/>
      <lastmod>2026-11-01T20:54:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/mean-confidence-interval-demo/sssss6nj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/mean-confidence-interval-demo/sssss6nj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/mean-confidence-interval-demo/sssss6nj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/mean-confidence-interval-demo/sssss6nj"/>
      <lastmod>2026-11-01T20:54:33+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-7-8-20-lesson-memory-test/sssss6np</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-8-20-lesson-memory-test/sssss6np"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-8-20-lesson-memory-test/sssss6np"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-8-20-lesson-memory-test/sssss6np"/>
      <lastmod>2026-11-02T10:35:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-7-8-20-lesson-memory-test/sssss6np</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-7-8-20-lesson-memory-test/sssss6np"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-7-8-20-lesson-memory-test/sssss6np"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-7-8-20-lesson-memory-test/sssss6np"/>
      <lastmod>2026-11-02T10:35:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/locus-problem-5/sssss6nw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-problem-5/sssss6nw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-problem-5/sssss6nw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-problem-5/sssss6nw"/>
      <lastmod>2026-11-02T16:37:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/locus-problem-5/sssss6nw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/locus-problem-5/sssss6nw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/locus-problem-5/sssss6nw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/locus-problem-5/sssss6nw"/>
      <lastmod>2026-11-02T16:37:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/calculate-the-area-of-a-parallelogram/sssss6n6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculate-the-area-of-a-parallelogram/sssss6n6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculate-the-area-of-a-parallelogram/sssss6n6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculate-the-area-of-a-parallelogram/sssss6n6"/>
      <lastmod>2026-11-02T18:44:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/calculate-the-area-of-a-parallelogram/sssss6n6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/calculate-the-area-of-a-parallelogram/sssss6n6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/calculate-the-area-of-a-parallelogram/sssss6n6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/calculate-the-area-of-a-parallelogram/sssss6n6"/>
      <lastmod>2026-11-02T18:44:24+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/volume-and-surface-area-of-a-sphere/sssss6ng</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-and-surface-area-of-a-sphere/sssss6ng"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-and-surface-area-of-a-sphere/sssss6ng"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-and-surface-area-of-a-sphere/sssss6ng"/>
      <lastmod>2026-11-02T02:10:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/volume-and-surface-area-of-a-sphere/sssss6ng</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/volume-and-surface-area-of-a-sphere/sssss6ng"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/volume-and-surface-area-of-a-sphere/sssss6ng"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/volume-and-surface-area-of-a-sphere/sssss6ng"/>
      <lastmod>2026-11-02T02:10:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/unit-circle-and-graph-of-cosine/sssss6n9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-graph-of-cosine/sssss6n9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-graph-of-cosine/sssss6n9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-graph-of-cosine/sssss6n9"/>
      <lastmod>2026-11-01T19:12:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/unit-circle-and-graph-of-cosine/sssss6n9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/unit-circle-and-graph-of-cosine/sssss6n9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/unit-circle-and-graph-of-cosine/sssss6n9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/unit-circle-and-graph-of-cosine/sssss6n9"/>
      <lastmod>2026-11-01T19:12:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/surface-area-and-volume-relationships/sssss6ne</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-and-volume-relationships/sssss6ne"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-and-volume-relationships/sssss6ne"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-and-volume-relationships/sssss6ne"/>
      <lastmod>2026-11-02T17:09:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/surface-area-and-volume-relationships/sssss6ne</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/surface-area-and-volume-relationships/sssss6ne"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/surface-area-and-volume-relationships/sssss6ne"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/surface-area-and-volume-relationships/sssss6ne"/>
      <lastmod>2026-11-02T17:09:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/proper-fractions-demo/sssss6nv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proper-fractions-demo/sssss6nv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proper-fractions-demo/sssss6nv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proper-fractions-demo/sssss6nv"/>
      <lastmod>2026-11-02T18:58:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/proper-fractions-demo/sssss6nv</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/proper-fractions-demo/sssss6nv"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/proper-fractions-demo/sssss6nv"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/proper-fractions-demo/sssss6nv"/>
      <lastmod>2026-11-02T18:58:47+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cone-net-by-b-caplan/sssss6n4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-net-by-b-caplan/sssss6n4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-net-by-b-caplan/sssss6n4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-net-by-b-caplan/sssss6n4"/>
      <lastmod>2026-11-02T18:59:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cone-net-by-b-caplan/sssss6n4</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cone-net-by-b-caplan/sssss6n4"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cone-net-by-b-caplan/sssss6n4"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cone-net-by-b-caplan/sssss6n4"/>
      <lastmod>2026-11-02T18:59:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/transformations-with-geogebra/sssss6nl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-with-geogebra/sssss6nl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-with-geogebra/sssss6nl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-with-geogebra/sssss6nl"/>
      <lastmod>2026-11-01T21:59:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/transformations-with-geogebra/sssss6nl</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/transformations-with-geogebra/sssss6nl"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/transformations-with-geogebra/sssss6nl"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/transformations-with-geogebra/sssss6nl"/>
      <lastmod>2026-11-01T21:59:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/intersection-of-lines/sssss6ny</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-lines/sssss6ny"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-lines/sssss6ny"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-lines/sssss6ny"/>
      <lastmod>2026-11-02T00:16:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/intersection-of-lines/sssss6ny</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/intersection-of-lines/sssss6ny"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/intersection-of-lines/sssss6ny"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/intersection-of-lines/sssss6ny"/>
      <lastmod>2026-11-02T00:16:54+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/demonstration-of-volume-of-solids-of-revolution/sssss6na</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-volume-of-solids-of-revolution/sssss6na"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-volume-of-solids-of-revolution/sssss6na"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-volume-of-solids-of-revolution/sssss6na"/>
      <lastmod>2026-11-01T23:54:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/demonstration-of-volume-of-solids-of-revolution/sssss6na</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/demonstration-of-volume-of-solids-of-revolution/sssss6na"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/demonstration-of-volume-of-solids-of-revolution/sssss6na"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/demonstration-of-volume-of-solids-of-revolution/sssss6na"/>
      <lastmod>2026-11-01T23:54:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ninja-cat-coordinates/sssss6nc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ninja-cat-coordinates/sssss6nc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ninja-cat-coordinates/sssss6nc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ninja-cat-coordinates/sssss6nc"/>
      <lastmod>2026-11-01T19:25:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ninja-cat-coordinates/sssss6nc</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ninja-cat-coordinates/sssss6nc"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ninja-cat-coordinates/sssss6nc"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ninja-cat-coordinates/sssss6nc"/>
      <lastmod>2026-11-01T19:25:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hypotrochoid/sssss6nr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hypotrochoid/sssss6nr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hypotrochoid/sssss6nr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hypotrochoid/sssss6nr"/>
      <lastmod>2026-11-01T23:44:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hypotrochoid/sssss6nr</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hypotrochoid/sssss6nr"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hypotrochoid/sssss6nr"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hypotrochoid/sssss6nr"/>
      <lastmod>2026-11-01T23:44:46+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-dissection-demo/sssss6nh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-dissection-demo/sssss6nh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-dissection-demo/sssss6nh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-dissection-demo/sssss6nh"/>
      <lastmod>2026-11-01T21:57:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-dissection-demo/sssss6nh</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-dissection-demo/sssss6nh"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-dissection-demo/sssss6nh"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-dissection-demo/sssss6nh"/>
      <lastmod>2026-11-01T21:57:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/complex-solutions-of-quadratic-functions/sssss6nt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-solutions-of-quadratic-functions/sssss6nt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-solutions-of-quadratic-functions/sssss6nt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-solutions-of-quadratic-functions/sssss6nt"/>
      <lastmod>2026-11-02T08:46:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/complex-solutions-of-quadratic-functions/sssss6nt</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/complex-solutions-of-quadratic-functions/sssss6nt"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/complex-solutions-of-quadratic-functions/sssss6nt"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/complex-solutions-of-quadratic-functions/sssss6nt"/>
      <lastmod>2026-11-02T08:46:04+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/chinese-match-puzzles-2-7-puzzles/sssss6nx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chinese-match-puzzles-2-7-puzzles/sssss6nx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chinese-match-puzzles-2-7-puzzles/sssss6nx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chinese-match-puzzles-2-7-puzzles/sssss6nx"/>
      <lastmod>2026-11-01T21:28:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/chinese-match-puzzles-2-7-puzzles/sssss6nx</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/chinese-match-puzzles-2-7-puzzles/sssss6nx"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/chinese-match-puzzles-2-7-puzzles/sssss6nx"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/chinese-match-puzzles-2-7-puzzles/sssss6nx"/>
      <lastmod>2026-11-01T21:28:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/rectangular-prism-and-cross-sections/sssss6ni</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-prism-and-cross-sections/sssss6ni"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-prism-and-cross-sections/sssss6ni"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-prism-and-cross-sections/sssss6ni"/>
      <lastmod>2026-11-02T18:33:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/rectangular-prism-and-cross-sections/sssss6ni</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/rectangular-prism-and-cross-sections/sssss6ni"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/rectangular-prism-and-cross-sections/sssss6ni"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/rectangular-prism-and-cross-sections/sssss6ni"/>
      <lastmod>2026-11-02T18:33:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/numeric-triple-vs-third-comparison/sssss6no</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/numeric-triple-vs-third-comparison/sssss6no"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/numeric-triple-vs-third-comparison/sssss6no"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/numeric-triple-vs-third-comparison/sssss6no"/>
      <lastmod>2026-11-01T23:39:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/numeric-triple-vs-third-comparison/sssss6no</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/numeric-triple-vs-third-comparison/sssss6no"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/numeric-triple-vs-third-comparison/sssss6no"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/numeric-triple-vs-third-comparison/sssss6no"/>
      <lastmod>2026-11-01T23:39:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/electron-density-layer-model/sssss62s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/electron-density-layer-model/sssss62s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/electron-density-layer-model/sssss62s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/electron-density-layer-model/sssss62s"/>
      <lastmod>2026-11-02T03:09:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/electron-density-layer-model/sssss62s</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/electron-density-layer-model/sssss62s"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/electron-density-layer-model/sssss62s"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/electron-density-layer-model/sssss62s"/>
      <lastmod>2026-11-02T03:09:18+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geogebra-algebra-view-tutorial/sssss627</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-algebra-view-tutorial/sssss627"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-algebra-view-tutorial/sssss627"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-algebra-view-tutorial/sssss627"/>
      <lastmod>2026-11-01T23:18:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geogebra-algebra-view-tutorial/sssss627</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geogebra-algebra-view-tutorial/sssss627"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geogebra-algebra-view-tutorial/sssss627"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geogebra-algebra-view-tutorial/sssss627"/>
      <lastmod>2026-11-01T23:18:27+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilations-on-a-square-grid-by-ms-espy/sssss62n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-on-a-square-grid-by-ms-espy/sssss62n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-on-a-square-grid-by-ms-espy/sssss62n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-on-a-square-grid-by-ms-espy/sssss62n"/>
      <lastmod>2026-11-02T16:58:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilations-on-a-square-grid-by-ms-espy/sssss62n</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilations-on-a-square-grid-by-ms-espy/sssss62n"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilations-on-a-square-grid-by-ms-espy/sssss62n"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilations-on-a-square-grid-by-ms-espy/sssss62n"/>
      <lastmod>2026-11-02T16:58:19+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lattice-points-under-hyperbola/sssss622</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lattice-points-under-hyperbola/sssss622"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lattice-points-under-hyperbola/sssss622"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lattice-points-under-hyperbola/sssss622"/>
      <lastmod>2026-11-02T17:40:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lattice-points-under-hyperbola/sssss622</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lattice-points-under-hyperbola/sssss622"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lattice-points-under-hyperbola/sssss622"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lattice-points-under-hyperbola/sssss622"/>
      <lastmod>2026-11-02T17:40:05+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/characteristics-of-a-kite/sssss62k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/characteristics-of-a-kite/sssss62k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/characteristics-of-a-kite/sssss62k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/characteristics-of-a-kite/sssss62k"/>
      <lastmod>2026-11-02T12:48:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/characteristics-of-a-kite/sssss62k</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/characteristics-of-a-kite/sssss62k"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/characteristics-of-a-kite/sssss62k"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/characteristics-of-a-kite/sssss62k"/>
      <lastmod>2026-11-02T12:48:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/venn-diagram-logic-demo-by-karl/sssss62z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-logic-demo-by-karl/sssss62z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-logic-demo-by-karl/sssss62z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-logic-demo-by-karl/sssss62z"/>
      <lastmod>2026-11-02T00:57:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/venn-diagram-logic-demo-by-karl/sssss62z</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/venn-diagram-logic-demo-by-karl/sssss62z"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/venn-diagram-logic-demo-by-karl/sssss62z"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/venn-diagram-logic-demo-by-karl/sssss62z"/>
      <lastmod>2026-11-02T00:57:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/60-degree-angle-construction/sssss620</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/60-degree-angle-construction/sssss620"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/60-degree-angle-construction/sssss620"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/60-degree-angle-construction/sssss620"/>
      <lastmod>2026-11-01T21:27:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/60-degree-angle-construction/sssss620</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/60-degree-angle-construction/sssss620"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/60-degree-angle-construction/sssss620"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/60-degree-angle-construction/sssss620"/>
      <lastmod>2026-11-01T21:27:17+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/creating-surfaces-of-revolution-about-x-axis-using-ggb-ar/sssss62d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/creating-surfaces-of-revolution-about-x-axis-using-ggb-ar/sssss62d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/creating-surfaces-of-revolution-about-x-axis-using-ggb-ar/sssss62d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/creating-surfaces-of-revolution-about-x-axis-using-ggb-ar/sssss62d"/>
      <lastmod>2026-11-02T16:37:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/creating-surfaces-of-revolution-about-x-axis-using-ggb-ar/sssss62d</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/creating-surfaces-of-revolution-about-x-axis-using-ggb-ar/sssss62d"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/creating-surfaces-of-revolution-about-x-axis-using-ggb-ar/sssss62d"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/creating-surfaces-of-revolution-about-x-axis-using-ggb-ar/sssss62d"/>
      <lastmod>2026-11-02T16:37:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cylinder-and-centroid-demonstration/sssss62f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-and-centroid-demonstration/sssss62f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-and-centroid-demonstration/sssss62f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-and-centroid-demonstration/sssss62f"/>
      <lastmod>2026-11-02T16:32:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cylinder-and-centroid-demonstration/sssss62f</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cylinder-and-centroid-demonstration/sssss62f"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cylinder-and-centroid-demonstration/sssss62f"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cylinder-and-centroid-demonstration/sssss62f"/>
      <lastmod>2026-11-02T16:32:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/investigating-planes/sssss628</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-planes/sssss628"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-planes/sssss628"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-planes/sssss628"/>
      <lastmod>2026-11-02T00:39:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/investigating-planes/sssss628</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/investigating-planes/sssss628"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/investigating-planes/sssss628"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/investigating-planes/sssss628"/>
      <lastmod>2026-11-02T00:39:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-division-demonstration-by-diego-lieban-2/sssss62u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-division-demonstration-by-diego-lieban-2/sssss62u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-division-demonstration-by-diego-lieban-2/sssss62u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-division-demonstration-by-diego-lieban-2/sssss62u"/>
      <lastmod>2026-11-02T02:56:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-division-demonstration-by-diego-lieban-2/sssss62u</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-division-demonstration-by-diego-lieban-2/sssss62u"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-division-demonstration-by-diego-lieban-2/sssss62u"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-division-demonstration-by-diego-lieban-2/sssss62u"/>
      <lastmod>2026-11-02T02:56:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/graphing-to-the-iss/sssss625</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-to-the-iss/sssss625"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-to-the-iss/sssss625"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-to-the-iss/sssss625"/>
      <lastmod>2026-11-02T09:40:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/graphing-to-the-iss/sssss625</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/graphing-to-the-iss/sssss625"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/graphing-to-the-iss/sssss625"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/graphing-to-the-iss/sssss625"/>
      <lastmod>2026-11-02T09:40:53+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/im-8-7-3-lesson-powers-of-powers-of-10/sssss62b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-8-7-3-lesson-powers-of-powers-of-10/sssss62b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-8-7-3-lesson-powers-of-powers-of-10/sssss62b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-8-7-3-lesson-powers-of-powers-of-10/sssss62b"/>
      <lastmod>2026-11-01T20:15:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/im-8-7-3-lesson-powers-of-powers-of-10/sssss62b</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/im-8-7-3-lesson-powers-of-powers-of-10/sssss62b"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/im-8-7-3-lesson-powers-of-powers-of-10/sssss62b"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/im-8-7-3-lesson-powers-of-powers-of-10/sssss62b"/>
      <lastmod>2026-11-01T20:15:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sections-of-spheres-by-dan-dale/sssss623</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-spheres-by-dan-dale/sssss623"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-spheres-by-dan-dale/sssss623"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-spheres-by-dan-dale/sssss623"/>
      <lastmod>2026-11-01T23:18:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sections-of-spheres-by-dan-dale/sssss623</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-spheres-by-dan-dale/sssss623"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-spheres-by-dan-dale/sssss623"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-spheres-by-dan-dale/sssss623"/>
      <lastmod>2026-11-01T23:18:12+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-graphs-of-derivatives-by-patrickccatalano-gmail-com/sssss62q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-graphs-of-derivatives-by-patrickccatalano-gmail-com/sssss62q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-graphs-of-derivatives-by-patrickccatalano-gmail-com/sssss62q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-graphs-of-derivatives-by-patrickccatalano-gmail-com/sssss62q"/>
      <lastmod>2026-11-02T09:03:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-graphs-of-derivatives-by-patrickccatalano-gmail-com/sssss62q</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-graphs-of-derivatives-by-patrickccatalano-gmail-com/sssss62q"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-graphs-of-derivatives-by-patrickccatalano-gmail-com/sssss62q"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-graphs-of-derivatives-by-patrickccatalano-gmail-com/sssss62q"/>
      <lastmod>2026-11-02T09:03:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/the-geometric-meaning-of-a/sssss621</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-geometric-meaning-of-a/sssss621"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-geometric-meaning-of-a/sssss621"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-geometric-meaning-of-a/sssss621"/>
      <lastmod>2026-11-02T02:55:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/the-geometric-meaning-of-a/sssss621</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/the-geometric-meaning-of-a/sssss621"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/the-geometric-meaning-of-a/sssss621"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/the-geometric-meaning-of-a/sssss621"/>
      <lastmod>2026-11-02T02:55:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/properties-of-isosceles-triangles-demo-by-ms-kayla-moore/sssss62m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-isosceles-triangles-demo-by-ms-kayla-moore/sssss62m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-isosceles-triangles-demo-by-ms-kayla-moore/sssss62m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-isosceles-triangles-demo-by-ms-kayla-moore/sssss62m"/>
      <lastmod>2026-11-02T17:04:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/properties-of-isosceles-triangles-demo-by-ms-kayla-moore/sssss62m</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/properties-of-isosceles-triangles-demo-by-ms-kayla-moore/sssss62m"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/properties-of-isosceles-triangles-demo-by-ms-kayla-moore/sssss62m"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/properties-of-isosceles-triangles-demo-by-ms-kayla-moore/sssss62m"/>
      <lastmod>2026-11-02T17:04:28+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hexastring-cube/sssss62j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexastring-cube/sssss62j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexastring-cube/sssss62j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexastring-cube/sssss62j"/>
      <lastmod>2026-11-01T23:09:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hexastring-cube/sssss62j</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexastring-cube/sssss62j"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexastring-cube/sssss62j"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexastring-cube/sssss62j"/>
      <lastmod>2026-11-01T23:09:14+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/ellipse-focal-property/sssss62p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-focal-property/sssss62p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-focal-property/sssss62p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-focal-property/sssss62p"/>
      <lastmod>2026-11-02T18:44:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/ellipse-focal-property/sssss62p</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/ellipse-focal-property/sssss62p"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/ellipse-focal-property/sssss62p"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/ellipse-focal-property/sssss62p"/>
      <lastmod>2026-11-02T18:44:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/draw-a-line-with-3-points-negative-slope-and-fractions/sssss62w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-a-line-with-3-points-negative-slope-and-fractions/sssss62w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-a-line-with-3-points-negative-slope-and-fractions/sssss62w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-a-line-with-3-points-negative-slope-and-fractions/sssss62w"/>
      <lastmod>2026-11-02T18:04:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/draw-a-line-with-3-points-negative-slope-and-fractions/sssss62w</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/draw-a-line-with-3-points-negative-slope-and-fractions/sssss62w"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/draw-a-line-with-3-points-negative-slope-and-fractions/sssss62w"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/draw-a-line-with-3-points-negative-slope-and-fractions/sssss62w"/>
      <lastmod>2026-11-02T18:04:07+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/pythagorean-theorem-and-triangle-construction/sssss626</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-and-triangle-construction/sssss626"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-and-triangle-construction/sssss626"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-and-triangle-construction/sssss626"/>
      <lastmod>2026-11-01T20:46:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/pythagorean-theorem-and-triangle-construction/sssss626</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-and-triangle-construction/sssss626"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/pythagorean-theorem-and-triangle-construction/sssss626"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/pythagorean-theorem-and-triangle-construction/sssss626"/>
      <lastmod>2026-11-01T20:46:22+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/cube-nets-by-mran/sssss62g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-nets-by-mran/sssss62g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-nets-by-mran/sssss62g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-nets-by-mran/sssss62g"/>
      <lastmod>2026-11-02T00:48:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/cube-nets-by-mran/sssss62g</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/cube-nets-by-mran/sssss62g"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/cube-nets-by-mran/sssss62g"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/cube-nets-by-mran/sssss62g"/>
      <lastmod>2026-11-02T00:48:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-transformations-and-vectors/sssss629</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-vectors/sssss629"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-and-vectors/sssss629"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-vectors/sssss629"/>
      <lastmod>2026-11-02T18:26:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-transformations-and-vectors/sssss629</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-vectors/sssss629"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-transformations-and-vectors/sssss629"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-transformations-and-vectors/sssss629"/>
      <lastmod>2026-11-02T18:26:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/collecting-like-terms-practice/sssss62e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/collecting-like-terms-practice/sssss62e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/collecting-like-terms-practice/sssss62e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/collecting-like-terms-practice/sssss62e"/>
      <lastmod>2026-11-01T21:12:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/collecting-like-terms-practice/sssss62e</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/collecting-like-terms-practice/sssss62e"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/collecting-like-terms-practice/sssss62e"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/collecting-like-terms-practice/sssss62e"/>
      <lastmod>2026-11-01T21:12:30+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/polynomial-roots-and-factors/sssss62v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-roots-and-factors/sssss62v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-roots-and-factors/sssss62v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-roots-and-factors/sssss62v"/>
      <lastmod>2026-11-01T23:13:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/polynomial-roots-and-factors/sssss62v</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/polynomial-roots-and-factors/sssss62v"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/polynomial-roots-and-factors/sssss62v"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/polynomial-roots-and-factors/sssss62v"/>
      <lastmod>2026-11-01T23:13:08+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/further-kinematics-equilateral-triangles-and-integral-calculus/sssss624</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/further-kinematics-equilateral-triangles-and-integral-calculus/sssss624"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/further-kinematics-equilateral-triangles-and-integral-calculus/sssss624"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/further-kinematics-equilateral-triangles-and-integral-calculus/sssss624"/>
      <lastmod>2026-11-02T03:10:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/further-kinematics-equilateral-triangles-and-integral-calculus/sssss624</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/further-kinematics-equilateral-triangles-and-integral-calculus/sssss624"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/further-kinematics-equilateral-triangles-and-integral-calculus/sssss624"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/further-kinematics-equilateral-triangles-and-integral-calculus/sssss624"/>
      <lastmod>2026-11-02T03:10:43+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometrical-and-mechanical-meanings-of-derivative/sssss62l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometrical-and-mechanical-meanings-of-derivative/sssss62l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometrical-and-mechanical-meanings-of-derivative/sssss62l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometrical-and-mechanical-meanings-of-derivative/sssss62l"/>
      <lastmod>2026-11-01T19:06:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometrical-and-mechanical-meanings-of-derivative/sssss62l</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometrical-and-mechanical-meanings-of-derivative/sssss62l"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometrical-and-mechanical-meanings-of-derivative/sssss62l"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometrical-and-mechanical-meanings-of-derivative/sssss62l"/>
      <lastmod>2026-11-01T19:06:31+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/tile-pattern/sssss62y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tile-pattern/sssss62y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tile-pattern/sssss62y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tile-pattern/sssss62y"/>
      <lastmod>2026-11-01T20:41:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/tile-pattern/sssss62y</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/tile-pattern/sssss62y"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/tile-pattern/sssss62y"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/tile-pattern/sssss62y"/>
      <lastmod>2026-11-01T20:41:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exploring-4-main-conic-sections-with-geogebra-ar/sssss62a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-4-main-conic-sections-with-geogebra-ar/sssss62a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-4-main-conic-sections-with-geogebra-ar/sssss62a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-4-main-conic-sections-with-geogebra-ar/sssss62a"/>
      <lastmod>2026-11-02T00:09:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exploring-4-main-conic-sections-with-geogebra-ar/sssss62a</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exploring-4-main-conic-sections-with-geogebra-ar/sssss62a"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exploring-4-main-conic-sections-with-geogebra-ar/sssss62a"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exploring-4-main-conic-sections-with-geogebra-ar/sssss62a"/>
      <lastmod>2026-11-02T00:09:40+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/design-based-on-an-epicycloid/sssss62c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/design-based-on-an-epicycloid/sssss62c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/design-based-on-an-epicycloid/sssss62c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/design-based-on-an-epicycloid/sssss62c"/>
      <lastmod>2026-11-02T06:35:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/design-based-on-an-epicycloid/sssss62c</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/design-based-on-an-epicycloid/sssss62c"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/design-based-on-an-epicycloid/sssss62c"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/design-based-on-an-epicycloid/sssss62c"/>
      <lastmod>2026-11-02T06:35:49+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/point-slope-form-demonstration/sssss62r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-slope-form-demonstration/sssss62r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-slope-form-demonstration/sssss62r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-slope-form-demonstration/sssss62r"/>
      <lastmod>2026-11-01T19:14:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/point-slope-form-demonstration/sssss62r</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-slope-form-demonstration/sssss62r"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-slope-form-demonstration/sssss62r"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-slope-form-demonstration/sssss62r"/>
      <lastmod>2026-11-01T19:14:42+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/sections-of-rectangular-prisms-cuboids/sssss62h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-rectangular-prisms-cuboids/sssss62h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-rectangular-prisms-cuboids/sssss62h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-rectangular-prisms-cuboids/sssss62h"/>
      <lastmod>2026-11-01T23:22:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/sections-of-rectangular-prisms-cuboids/sssss62h</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/sections-of-rectangular-prisms-cuboids/sssss62h"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/sections-of-rectangular-prisms-cuboids/sssss62h"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/sections-of-rectangular-prisms-cuboids/sssss62h"/>
      <lastmod>2026-11-01T23:22:32+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/square-template-with-investigation-questions/sssss62t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-template-with-investigation-questions/sssss62t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-template-with-investigation-questions/sssss62t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-template-with-investigation-questions/sssss62t"/>
      <lastmod>2026-11-01T21:47:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/square-template-with-investigation-questions/sssss62t</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/square-template-with-investigation-questions/sssss62t"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/square-template-with-investigation-questions/sssss62t"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/square-template-with-investigation-questions/sssss62t"/>
      <lastmod>2026-11-01T21:47:35+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/gaussian-distributions-and-transformations/sssss62x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gaussian-distributions-and-transformations/sssss62x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gaussian-distributions-and-transformations/sssss62x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gaussian-distributions-and-transformations/sssss62x"/>
      <lastmod>2026-11-02T02:35:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/gaussian-distributions-and-transformations/sssss62x</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/gaussian-distributions-and-transformations/sssss62x"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/gaussian-distributions-and-transformations/sssss62x"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/gaussian-distributions-and-transformations/sssss62x"/>
      <lastmod>2026-11-02T02:35:00+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/law-of-sines-exploration/sssss62i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-sines-exploration/sssss62i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-sines-exploration/sssss62i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-sines-exploration/sssss62i"/>
      <lastmod>2026-11-01T23:45:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/law-of-sines-exploration/sssss62i</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/law-of-sines-exploration/sssss62i"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/law-of-sines-exploration/sssss62i"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/law-of-sines-exploration/sssss62i"/>
      <lastmod>2026-11-01T23:45:41+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/diagonals-of-parallelograms/sssss62o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diagonals-of-parallelograms/sssss62o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diagonals-of-parallelograms/sssss62o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diagonals-of-parallelograms/sssss62o"/>
      <lastmod>2026-11-02T18:38:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/diagonals-of-parallelograms/sssss62o</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/diagonals-of-parallelograms/sssss62o"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/diagonals-of-parallelograms/sssss62o"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/diagonals-of-parallelograms/sssss62o"/>
      <lastmod>2026-11-02T18:38:06+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/solid-disk-method-with-hole/sssss6ks</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solid-disk-method-with-hole/sssss6ks"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solid-disk-method-with-hole/sssss6ks"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solid-disk-method-with-hole/sssss6ks"/>
      <lastmod>2026-11-01T19:16:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/solid-disk-method-with-hole/sssss6ks</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/solid-disk-method-with-hole/sssss6ks"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/solid-disk-method-with-hole/sssss6ks"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/solid-disk-method-with-hole/sssss6ks"/>
      <lastmod>2026-11-01T19:16:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/visualizing-curved-surface-area-of-cones-by-dan-dale/sssss6k7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-curved-surface-area-of-cones-by-dan-dale/sssss6k7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-curved-surface-area-of-cones-by-dan-dale/sssss6k7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-curved-surface-area-of-cones-by-dan-dale/sssss6k7"/>
      <lastmod>2026-11-01T21:37:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/visualizing-curved-surface-area-of-cones-by-dan-dale/sssss6k7</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/visualizing-curved-surface-area-of-cones-by-dan-dale/sssss6k7"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/visualizing-curved-surface-area-of-cones-by-dan-dale/sssss6k7"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/visualizing-curved-surface-area-of-cones-by-dan-dale/sssss6k7"/>
      <lastmod>2026-11-01T21:37:55+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/dilation-investigation/sssss6kn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-investigation/sssss6kn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-investigation/sssss6kn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-investigation/sssss6kn"/>
      <lastmod>2026-11-02T18:47:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/dilation-investigation/sssss6kn</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/dilation-investigation/sssss6kn"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/dilation-investigation/sssss6kn"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/dilation-investigation/sssss6kn"/>
      <lastmod>2026-11-02T18:47:59+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/subtraction-of-directed-numbers-dynamic-number-line-demonstration/sssss6k2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtraction-of-directed-numbers-dynamic-number-line-demonstration/sssss6k2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtraction-of-directed-numbers-dynamic-number-line-demonstration/sssss6k2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtraction-of-directed-numbers-dynamic-number-line-demonstration/sssss6k2"/>
      <lastmod>2026-11-01T20:49:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/subtraction-of-directed-numbers-dynamic-number-line-demonstration/sssss6k2</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/subtraction-of-directed-numbers-dynamic-number-line-demonstration/sssss6k2"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/subtraction-of-directed-numbers-dynamic-number-line-demonstration/sssss6k2"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/subtraction-of-directed-numbers-dynamic-number-line-demonstration/sssss6k2"/>
      <lastmod>2026-11-01T20:49:02+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/orthocenter-demonstration-by-ngan-chiu-yeung/sssss6kk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-demonstration-by-ngan-chiu-yeung/sssss6kk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-demonstration-by-ngan-chiu-yeung/sssss6kk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-demonstration-by-ngan-chiu-yeung/sssss6kk"/>
      <lastmod>2026-11-02T18:01:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/orthocenter-demonstration-by-ngan-chiu-yeung/sssss6kk</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/orthocenter-demonstration-by-ngan-chiu-yeung/sssss6kk"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/orthocenter-demonstration-by-ngan-chiu-yeung/sssss6kk"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/orthocenter-demonstration-by-ngan-chiu-yeung/sssss6kk"/>
      <lastmod>2026-11-02T18:01:20+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/geometric-construction-of-netflix-logo/sssss6kz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-netflix-logo/sssss6kz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-netflix-logo/sssss6kz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-netflix-logo/sssss6kz"/>
      <lastmod>2026-11-01T23:14:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/geometric-construction-of-netflix-logo/sssss6kz</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/geometric-construction-of-netflix-logo/sssss6kz"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/geometric-construction-of-netflix-logo/sssss6kz"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/geometric-construction-of-netflix-logo/sssss6kz"/>
      <lastmod>2026-11-01T23:14:25+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/point-slope-form-practice/sssss6k0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-slope-form-practice/sssss6k0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-slope-form-practice/sssss6k0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-slope-form-practice/sssss6k0"/>
      <lastmod>2026-11-02T11:41:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/point-slope-form-practice/sssss6k0</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/point-slope-form-practice/sssss6k0"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/point-slope-form-practice/sssss6k0"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/point-slope-form-practice/sssss6k0"/>
      <lastmod>2026-11-02T11:41:57+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/hexagonal-prism-3d-construction-and-visualization/sssss6kd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagonal-prism-3d-construction-and-visualization/sssss6kd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagonal-prism-3d-construction-and-visualization/sssss6kd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagonal-prism-3d-construction-and-visualization/sssss6kd"/>
      <lastmod>2026-11-02T18:02:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/hexagonal-prism-3d-construction-and-visualization/sssss6kd</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/hexagonal-prism-3d-construction-and-visualization/sssss6kd"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/hexagonal-prism-3d-construction-and-visualization/sssss6kd"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/hexagonal-prism-3d-construction-and-visualization/sssss6kd"/>
      <lastmod>2026-11-02T18:02:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/wheel-paradox/sssss6kf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wheel-paradox/sssss6kf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wheel-paradox/sssss6kf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wheel-paradox/sssss6kf"/>
      <lastmod>2026-11-01T23:46:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/wheel-paradox/sssss6kf</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/wheel-paradox/sssss6kf"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/wheel-paradox/sssss6kf"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/wheel-paradox/sssss6kf"/>
      <lastmod>2026-11-01T23:46:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/planes-in-space/sssss6k8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planes-in-space/sssss6k8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes-in-space/sssss6k8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes-in-space/sssss6k8"/>
      <lastmod>2026-11-01T21:40:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/planes-in-space/sssss6k8</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/planes-in-space/sssss6k8"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/planes-in-space/sssss6k8"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/planes-in-space/sssss6k8"/>
      <lastmod>2026-11-01T21:40:23+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/lissajous-divisibility/sssss6ku</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lissajous-divisibility/sssss6ku"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lissajous-divisibility/sssss6ku"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lissajous-divisibility/sssss6ku"/>
      <lastmod>2026-11-02T02:38:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/lissajous-divisibility/sssss6ku</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/lissajous-divisibility/sssss6ku"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/lissajous-divisibility/sssss6ku"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/lissajous-divisibility/sssss6ku"/>
      <lastmod>2026-11-02T02:38:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exponential-function-model/sssss6k5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-function-model/sssss6k5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-function-model/sssss6k5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-function-model/sssss6k5"/>
      <lastmod>2026-11-02T08:35:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exponential-function-model/sssss6k5</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exponential-function-model/sssss6k5"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exponential-function-model/sssss6k5"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exponential-function-model/sssss6k5"/>
      <lastmod>2026-11-02T08:35:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/congruent-triangles-exercise-6/sssss6kb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruent-triangles-exercise-6/sssss6kb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruent-triangles-exercise-6/sssss6kb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruent-triangles-exercise-6/sssss6kb"/>
      <lastmod>2026-11-02T16:41:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/congruent-triangles-exercise-6/sssss6kb</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/congruent-triangles-exercise-6/sssss6kb"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/congruent-triangles-exercise-6/sssss6kb"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/congruent-triangles-exercise-6/sssss6kb"/>
      <lastmod>2026-11-02T16:41:51+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/exterior-angles-in-convex-polygons/sssss6k3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angles-in-convex-polygons/sssss6k3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angles-in-convex-polygons/sssss6k3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angles-in-convex-polygons/sssss6k3"/>
      <lastmod>2026-11-02T02:26:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/exterior-angles-in-convex-polygons/sssss6k3</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/exterior-angles-in-convex-polygons/sssss6k3"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/exterior-angles-in-convex-polygons/sssss6k3"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/exterior-angles-in-convex-polygons/sssss6k3"/>
      <lastmod>2026-11-02T02:26:09+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/slope-and-angle-relationships-in-linear-functions/sssss6kq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-and-angle-relationships-in-linear-functions/sssss6kq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-and-angle-relationships-in-linear-functions/sssss6kq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-and-angle-relationships-in-linear-functions/sssss6kq"/>
      <lastmod>2026-11-02T03:06:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/slope-and-angle-relationships-in-linear-functions/sssss6kq</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/slope-and-angle-relationships-in-linear-functions/sssss6kq"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/slope-and-angle-relationships-in-linear-functions/sssss6kq"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/slope-and-angle-relationships-in-linear-functions/sssss6kq"/>
      <lastmod>2026-11-02T03:06:44+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/positive-integer-number-line-division/sssss6k1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/positive-integer-number-line-division/sssss6k1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/positive-integer-number-line-division/sssss6k1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/positive-integer-number-line-division/sssss6k1"/>
      <lastmod>2026-11-02T09:37:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/positive-integer-number-line-division/sssss6k1</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/positive-integer-number-line-division/sssss6k1"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/positive-integer-number-line-division/sssss6k1"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/positive-integer-number-line-division/sssss6k1"/>
      <lastmod>2026-11-02T09:37:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/logic-gates-demo/sssss6km</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logic-gates-demo/sssss6km"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logic-gates-demo/sssss6km"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logic-gates-demo/sssss6km"/>
      <lastmod>2026-11-02T16:45:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/logic-gates-demo/sssss6km</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/logic-gates-demo/sssss6km"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/logic-gates-demo/sssss6km"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/logic-gates-demo/sssss6km"/>
      <lastmod>2026-11-02T16:45:03+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/horizontal-translations/sssss6kj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-translations/sssss6kj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-translations/sssss6kj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-translations/sssss6kj"/>
      <lastmod>2026-11-02T18:20:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/horizontal-translations/sssss6kj</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/horizontal-translations/sssss6kj"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/horizontal-translations/sssss6kj"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/horizontal-translations/sssss6kj"/>
      <lastmod>2026-11-02T18:20:15+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/l-hopital-s-rule-demonstration/sssss6kp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/l-hopital-s-rule-demonstration/sssss6kp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/l-hopital-s-rule-demonstration/sssss6kp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/l-hopital-s-rule-demonstration/sssss6kp"/>
      <lastmod>2026-11-02T17:36:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/l-hopital-s-rule-demonstration/sssss6kp</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/l-hopital-s-rule-demonstration/sssss6kp"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/l-hopital-s-rule-demonstration/sssss6kp"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/l-hopital-s-rule-demonstration/sssss6kp"/>
      <lastmod>2026-11-02T17:36:11+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/green-parabola/sssss6kw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/green-parabola/sssss6kw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/green-parabola/sssss6kw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/green-parabola/sssss6kw"/>
      <lastmod>2026-11-02T18:18:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/green-parabola/sssss6kw</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/green-parabola/sssss6kw"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/green-parabola/sssss6kw"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/green-parabola/sssss6kw"/>
      <lastmod>2026-11-02T18:18:58+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/construction-of-a-rhombus-by-theodore-savich/sssss6k6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-a-rhombus-by-theodore-savich/sssss6k6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-a-rhombus-by-theodore-savich/sssss6k6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-a-rhombus-by-theodore-savich/sssss6k6"/>
      <lastmod>2026-11-02T15:54:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/construction-of-a-rhombus-by-theodore-savich/sssss6k6</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/construction-of-a-rhombus-by-theodore-savich/sssss6k6"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/construction-of-a-rhombus-by-theodore-savich/sssss6k6"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/construction-of-a-rhombus-by-theodore-savich/sssss6k6"/>
      <lastmod>2026-11-02T15:54:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/curves-constructed-with-straight-lines/sssss6kg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curves-constructed-with-straight-lines/sssss6kg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curves-constructed-with-straight-lines/sssss6kg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curves-constructed-with-straight-lines/sssss6kg"/>
      <lastmod>2026-11-02T16:58:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/curves-constructed-with-straight-lines/sssss6kg</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/curves-constructed-with-straight-lines/sssss6kg"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/curves-constructed-with-straight-lines/sssss6kg"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/curves-constructed-with-straight-lines/sssss6kg"/>
      <lastmod>2026-11-02T16:58:13+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/zh/case/constructing-rectangular-prisms-with-given-surface-area/sssss6k9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-rectangular-prisms-with-given-surface-area/sssss6k9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-rectangular-prisms-with-given-surface-area/sssss6k9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-rectangular-prisms-with-given-surface-area/sssss6k9"/>
      <lastmod>2026-11-01T19:23:50+00:00</lastmod>
    </url>
    <url>
      <loc>https://www.mathplotai.com/en/case/constructing-rectangular-prisms-with-given-surface-area/sssss6k9</loc>
      <xhtml:link rel="alternate" hreflang="zh" href="https://www.mathplotai.com/zh/case/constructing-rectangular-prisms-with-given-surface-area/sssss6k9"/>
      <xhtml:link rel="alternate" hreflang="en" href="https://www.mathplotai.com/en/case/constructing-rectangular-prisms-with-given-surface-area/sssss6k9"/>
      <xhtml:link rel="alternate" hreflang="x-default" href="https://www.mathplotai.com/zh/case/constructing-rectangular-prisms-with-given-surface-area/sssss6k9"/>
      <lastmod>2026-11-01T19:23:50+00:00</lastmod>
    </url>
</urlset>
